CN105143659A - Fuel injection valve and production method thereof - Google Patents
Fuel injection valve and production method thereof Download PDFInfo
- Publication number
- CN105143659A CN105143659A CN201480022851.4A CN201480022851A CN105143659A CN 105143659 A CN105143659 A CN 105143659A CN 201480022851 A CN201480022851 A CN 201480022851A CN 105143659 A CN105143659 A CN 105143659A
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- China
- Prior art keywords
- fuel
- mentioned
- fuel orifice
- recess
- manufacturing procedure
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
- F02M61/1833—Discharge orifices having changing cross sections, e.g. being divergent
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
- B23K26/142—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor for the removal of by-products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
- B23K26/146—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor the fluid stream containing a liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
- B23K26/382—Removing material by boring or cutting by boring
- B23K26/389—Removing material by boring or cutting by boring of fluid openings, e.g. nozzles, jets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
- F02M61/184—Discharge orifices having non circular sections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
- F02M63/0078—Valve member details, e.g. special shape, hollow or fuel passages in the valve member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8069—Fuel injection apparatus manufacture, repair or assembly involving removal of material from the fuel apparatus, e.g. by punching, hydro-erosion or mechanical operation
Abstract
The purpose of the present invention is to impede deposits from adhering in a fuel injection valve having a plurality of combinations of fuel injection holes and concavities, and to increase the degree of freedom in designing the placement and incline angle of the fuel injection holes. In order to achieve this purpose, the present invention has concavities (301o) formed by press-working in an outer surface of an injection hole formation member (301), and fuel injection holes (301n) formed by liquid jet lasers such as water jet lasers in bottom surfaces (301ob) of the concavities (301o). It is more preferable to perform grinding to form a valve seat constituent surface (301g) before the fuel injection holes (301n) are formed by liquid jet lasers.
Description
Technical field
The present invention relates to Fuelinjection nozzle and the manufacture method thereof of the burner oil for internal-combustion engine.
Background technique
As the background technique of the art, there is Japanese Unexamined Patent Publication 2011-140036 publication (patent documentation 1).In this publication (summary), describe a kind of laser processing device as the device processed the fuel orifice of Fuelinjection nozzle, it possesses: to the nozzle of hole burner oil; At the laser head of the liquid internal illuminating laser beam sprayed to hole; Keep the holder of machined object; And be configured in non-working position and interdict the laser beam of passing hole laser beam blocking tool, laser beam blocking tool be provided with by arrive hole liquid discharge discharge path.And then in this publication (0027 section), processing method as fuel orifice describes a kind of processing method, laser beam in gas irradiates to machined object and carries out roughing to fine pore by it, and utilizes water jet laser to carry out fine finishing to having carried out rough machined fine pore.Water jet laser can collect as the laser beam of required beam diameter and obtaining (0030-0032 section) by irradiating at the water column formed from nozzle ejection high pressure water (water jet) inner utilization laser head.Adopt this processing device or processing method, surface roughness can be made smaller fuel orifice to be processed as straight shape and reduce heat affecting (0049 section).In addition, laser beam blocking tool is processed (0050 section) for preventing the non-working position of the laser beam of the water jet laser of passing hole to machined object.
And, in Japanese Unexamined Patent Publication 2010-038127 publication (patent documentation 2), describe a kind of Fuelinjection nozzle, it is formed with fuel orifice by punch process and the recess A that formed in the exit opening portion of fuel orifice and recess B (paragraph 0031-0042).Fuel orifice, recess A and recess B are extruded by punch process and are processed as blind hole shape.Now, the material be extruded by punch process can form ridge on the face of the compressive plane opposition side with drift.When this ridge by valve seat form face cutting or electric discharge processing and after being removed, then fuel orifice can from the through face to opposition side, the compressive plane side of drift.In this Fuelinjection nozzle, quench after the valve seat removing ridge forms the cutting in face or electric discharge is processed, and then enforcement cutting carries out the fine finishing that valve seat forms face.Finally, water jet or fluid grinding is utilized by the overlap produced in fine finishing to remove.
Prior art document
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2011-140036 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2010-038127 publication
Summary of the invention
Invent problem to be solved
In Fuelinjection nozzle, the rigidity especially forming the position of fuel orifice forming the spray-hole forming member of fuel orifice is lower.When forming multiple fuel orifice, often forming a fuel orifice, the rigidity of spray-hole forming member all can be caused to reduce.Between multiple fuel orifice, when fuel orifice is different relative to the angle of inclination of the central axis of Fuelinjection nozzle or when true dip direction is different, then cannot carries out punch process to whole fuel orifices once but carry out punch process one by one.Therefore, before the machining of whole fuel orifices, spray-hole forming member needs the rigidity had needed for punch process.In Fuelinjection nozzle, in order to make the length L of fuel orifice be adequate value relative to the ratio (L/D) of the diameter D of fuel orifice, sometimes arrange in the exit opening portion of fuel orifice from outer surface side towards flow in fuel to the recess that caves in of upstream side (inner side).Especially the rigidity of spray-hole forming member can be caused in the structure that this recess is set to reduce.
When spray-hole forming member does not have the rigidity needed for punch process, such as, described in patent documentation 2, the fuel orifice sometimes formed by leading punch process can deform because of the stress produced when the punch process of the fuel orifice processed afterwards.Now then be difficult to the higher machining accuracy maintaining fuel orifice.
In the past, when forming fuel orifice and recess by punch process, need to consider that the rigidity of spray-hole forming member decides configuration or the angle of inclination of fuel orifice.Therefore, remarkable for the design of the configuration or angle of inclination that obtain the fuel orifice of desired injected fuel spray.
But in punch process, by making working surface be full shear plane, the surface roughness of working surface can be reduced and reduce sedimental attachment.The water jet laser beam machining that patent documentation 1 is recorded, although surface roughness can be made compared with the working surface of common laser beam machining (in gas laser beam machining) to reduce, not as good as the surface roughness of the working surface suitably processed by punch process.And, the Fuelinjection nozzle of patent documentation 1 does not have recess in the exit opening portion of fuel orifice, sediments in the structure of combination with multiple fuel orifice and recess is not easily adhered to and improves the demand of the configuration of fuel orifice and the design freedom at angle of inclination, does not then take in.
For this reason, the object of the invention is in the Fuelinjection nozzle of the combination with multiple fuel orifice and recess, make sediments be difficult to adhere to and improve the configuration of fuel orifice and the design freedom at angle of inclination.
For solving the method for problem
In order to reach above-mentioned purpose, the present invention forms recess at the outer surface of spray-hole forming member by punch process, and forms fuel orifice in the liquid jet laser beam machining such as underrun water jet laser beam machining of this recess.And then preferably, before forming fuel orifice by liquid jet laser beam machining, implement the grinding that valve seat formation face is processed.
The recess formed by punch process is exposed to the outer surface of spray-hole forming member, but the less and sediments of the surface roughness of this working surface is difficult to attachment.The surface roughness of the fuel orifice formed by liquid jet laser beam machining is larger than the surface roughness of recess, but surface roughness can be made to be less value, and can prevent sediments from adhering to owing to being undertaken cleaning by fuel injection all the time.
When passing through liquid jet laser beam machining at the bottom surface of recess formation fuel orifice, larger load can not be acted in spray-hole forming member, avoid producing larger stress in spray-hole forming member, therefore the configuration of fuel orifice and the design freedom at angle of inclination improve.
The effect of invention
According to the present invention, sediments can be made to be difficult to adhere to and to improve the configuration of fuel orifice and the design freedom at angle of inclination.
Problem other than the above, structure and effect can be understood by the explanation of following mode of execution.
Accompanying drawing explanation
Fig. 1 is the sectional view of the structure of the electro-magneto fuel injector representing one embodiment of the invention, is the longitudinal section representing the cutting plane parallel with central axis 100a.
Fig. 2 is the sectional view of the structure of the electro-magneto fuel injector representing one embodiment of the invention, is the longitudinal section representing the cutting plane parallel with central axis 100a.
Fig. 3 is the flow chart of the operation representing fabricate fuel spray-hole 301n and recess 301o in spray-hole forming member 301.
Fig. 4 is the figure of the blank represented for fabricate fuel spray-hole 301n and recess 301o.
Fig. 5 is the sectional view of the V-V section representing Fig. 4.
Fig. 6 is the sectional view of the machining state representing the manufacturing procedure S2 shown in Fig. 3.
Fig. 7 is the sectional view of the machining state representing the manufacturing procedure S3 shown in Fig. 3.
Fig. 8 be represent the manufacturing procedure S3 shown in Fig. 3 till the stereogram of the outward appearance of the spray-hole forming member 301 of state that terminates.
Fig. 9 is the sectional view of the IX-IX section representing Fig. 8.
Figure 10 is the sectional view for spray-hole forming member 301 expression of the state terminated to the manufacturing procedure S6 shown in Fig. 3 the section same with Fig. 9.
Figure 11 is the ideograph be described the water jet laser beam machining of fuel orifice.
Figure 12 is the sectional view for spray-hole forming member 301 expression of the state terminated to the manufacturing procedure S8 shown in Fig. 3 the section same with Fig. 9.
Figure 13 illustrates the first case of fuel orifice 301n.
Figure 14 illustrates the second case of fuel orifice 301n.
Figure 15 illustrates the 3rd example of fuel orifice 301n.
Embodiment
Below embodiments of the invention are described.
The structure of Fig. 1 and Fig. 2 to electro-magneto fuel injector 100 is utilized to be described.Fig. 1 is the sectional view of the structure of the electro-magneto fuel injector representing one embodiment of the invention, is the longitudinal section representing the cutting plane parallel with central axis 100a.Fig. 2 is the sectional view of the structure of the electro-magneto fuel injector representing one embodiment of the present of invention, is the longitudinal section representing the cutting plane parallel with central axis 100a.
Electro-magneto fuel injector 100 is made up of following portion: the fuel supplying part 200 of supply fuel; Tip portion is provided with the spray nozzle part 300 of the valve portion 300a allowing or interdict fuel circulation; And the electromagnetic drive part 400 of actuating valve portion 300a.In the present embodiment, the example of the electro-magneto fuel injector of gasoline-fueled internal-combustion engine is described.The present invention also can be applicable to the Fuelinjection nozzle that such as driven by piezoelectric element or for the Fuelinjection nozzle beyond the electro-magneto fuel injector of the form of diesel engine.
In the electro-magneto fuel injector 100 of the present embodiment, form fuel supplying part 200 in the upper end side of drawing and form spray nozzle part 300 in lower end side, and be configured with electromagnetic drive part 400 between fuel supplying part 200 and spray nozzle part 300.That is, be configured with successively along central axis 100a direction: fuel supplying part 200, electromagnetic drive part 400 and spray nozzle part 300.
Fuel supplying part 200 can link with not shown fuel distribution tube relative to the end of spray nozzle part 300 opposition side.Spray nozzle part 300 inserts the upper mounting hole formed of firing chamber forming member (gray iron etc.) of not shown sucking pipe or internal-combustion engine relative to the end of fuel supplying part 200 opposition side.Electro-magneto fuel injector 100 accepts fuel supply by fuel supplying part 200 from fuel distribution tube, and from the tip portion of spray nozzle part 300 to burner oil in sucking pipe or firing chamber.Inner at electro-magneto fuel injector 100, tip portion from the above-mentioned end of fuel supplying part 200 to spray nozzle part 300 is configured with fuel passage 101 (101a ~ 101h), and fuel is roughly flowed along the central axis 100a direction of electro-magneto fuel injector 100.
In the following description, for the two end part in the direction of the central axis 100a along electro-magneto fuel injector 100, the end or tip side that are positioned at the fuel supplying part 200 of opposition side relative to spray nozzle part 300 are called base end part or terminal side, and the end or tip side that are positioned at the spray nozzle part 300 of opposition side relative to fuel supplying part 200 are called tip portion or tip side.Further, with the above-below direction of Fig. 1 for benchmark to each portion being formed electro-magneto fuel injector additional " on " or D score be described.This is in order to easy understand illustrates, and electro-magneto fuel injector is not limited to this above-below direction relative to the actual load form of internal-combustion engine.
Below the structure of fuel supplying part 200, electromagnetic drive part 400 and spray nozzle part 300 is described in detail.
Fuel supplying part 200 is made up of fuel pipe 201, and this fuel pipe 201 is extended from an end of the fixed iron core 401 of formation electromagnetic drive part 400 described later.Namely in the present embodiment, fixed iron core 401 and fuel pipe 201 are configured as parts integratedly.
The fuel supplying mouth 201a be communicated with fuel passage 101a is offered in the upper end portion of fuel pipe 201.Be provided with expanding on the outer circumferential face of below relative to fuel supplying mouth 201a and form the wide diameter portion 201b of stepped part.O type circle 202 is installed between this wide diameter portion 201b and fuel supplying mouth 201a.And then, between O type circle 202 and wide diameter portion 201b, be provided with packing ring 203.
O type circle 202 when fuel supplying mouth 201a is installed on fuel distribution tube as prevent fuel leakage Sealing play function.Further, packing ring 203 is for auxiliary O type circle 202.Packing ring 203 is formed with multiple ring-shaped member lamination.The filter cleaner 204 that the foreign matter be mixed into carries out filtering is equipped in fuel in the inner side of fuel supplying mouth 201a.
Spray nozzle part 300 possesses valve portion 300a in its tip portion (underpart), and possesses hollow cylinder (nozzle body) 300b forming fuel passage 101f at the upstream side of valve portion 300a.In addition, tip seal 103 is provided with at the tip portion outer circumferential face of nozzle body 300b.
Valve portion 300a possesses: spray-hole forming member 301, guide element 302 and be arranged on the spool 303 of an end (tip side) of plunger rod 102.
Concave shape portion 301b is formed with downward from upper-end surface 301a in the inner side of spray-hole forming member 301.From upper-end surface 301a towards the depth side of concave shape portion 301b on concave shape portion 301b, be formed with the inner peripheral surface 301c of the cylindrical shape parallel with central axis 100a.Be formed with stepped part 301d in the lower end of inner peripheral surface 301c, and be formed with inner circumferential wall 301e from the inner circumferential of stepped part 301d towards the depth side of concave shape portion 301b.Upload at stepped part 301d and put guide element 302 described later.Inner circumferential wall 301e is formed as towards depth side undergauge and defines fuel chambers 301f.The valve seat being formed with cone shape in the lower end of inner circumferential wall 301e forms face 301g, and forms the apex of the cone shape of face 301g at formation valve seat, is provided with the relief portion 301h avoiding interfering with spool 303.
Form on the 301g of face at the valve seat of cone shape and be provided with ring-type the valve seat 301b contacted with spool 303.It is very narrow and close to linear contact lay that valve seat forms the contact width of face 301g and spool 303.Therefore, the annulus forming the contact width of face 301g and spool 303 suitable with valve seat is called valve seat 301b, thus difference valve seat 301b and valve seat form face 301g.But valve seat 301b is formed in valve seat and forms between the top and bottom of face 301g, sometimes also valve seat is formed face 301g and is called valve seat 301b.
In the outside of spray-hole forming member 301, be formed with the outer circumferential face 301i parallel with central axis 100a with drum downward from upper-end surface 301a.The lower end of outer circumferential face 301i is connected with end face (lower end surface) 301j.Curved face part (or the sphere portion) 301k outstanding from surface is formed at the central part of end face 301j.
According to said structure, spray-hole forming member 301 is formed as bottom tube-like and has: the cylindrical portion 301l be made up of inner peripheral surface 301c and outer circumferential face 301i; And by the bottom 301m comprising inner circumferential wall 301e, valve seat forms face 301g, relief portion 301h and the end face 301j of curved face part (or sphere portion) 301k is formed.
The bottom 301m of spray-hole forming member 301 is formed with fuel orifice 301n and recess 301o in the mode of through bottom 301m.Recess 301o has: the inner peripheral surface 301oa being formed as drum from the outer surface of curved face part 301k towards 301b side, concave shape portion; And the bottom surface 301ob be formed flatly.The outlet of fuel orifice 301n is at the bottom surface 301ob opening of recess 301o, and its entrance is at back side (valve seat forms 301g side, the face) opening of spray-hole forming member 301.The central axis of inner peripheral surface 301oa is consistent with the central axis of fuel orifice 301n.The central axis upright of bottom surface 301ob and fuel orifice 301n.Multiple fuel orifice 301n arranges recess 301o separately individually, is provided with the combination of multiple fuel orifice 301a and recess 301o.
Spray-hole forming member 301 can be made by manufacturing procedure described later, inserts and is fixed on the recess inner peripheral surface 300ba formed in the tip portion of nozzle body 300b.Now, the periphery of the top end of spray-hole forming member 301 is welded and sealed fuel with the top end inner circumferential of nozzle body 300b.
Guide element 302 is configured in the inner side of spray-hole forming member 301.The through through hole 302a to lower end surface from upper-end surface is formed at the central part of guide element 302.Through hole 302a forms the guide surface of the tip side (lower end side) of plunger rod 102, guides the movement of the plunger rod 102 on the direction (open and close valve direction) of centrally axis 100a.Be formed with fuel passage 101g at the outer circumferential face of guide element 302, be then formed with fuel passage 101h in the lower end surface of guide element 302.
Spool 303 valve portion 301a when valve closing contact with valve seat 301b and with valve seat 301b sealed fuel ordinatedly.Valve portion 300a is the main portion of burner oil, constitutes the spraying forming portion forming injected fuel spray.
Electromagnetic drive part 400 is made up of following portion: fixed iron core 401, coil 402, periphery yoke 403, movable core 404, first spring members (helical spring) 405, spring force adjustment member 406, second spring members (spring) 407 and spring seat member 408.
Fixed iron core 401 has: the lower end surface 401a formed in the end (underpart) relative to fuel pipe 201 opposition side, central part form fuel passage 101c through hole 401b and on the end of the extended side of fuel pipe 201 towards the lip part 401c that radial direction is formed highlightedly.The outer circumferential face 401d of fixed iron core 401 is chimeric with the inner peripheral surface of the wide diameter portion 300ba be formed on nozzle body 300b.Coil 402 is wound with at the outer circumferential side of fixed iron core 401 and nozzle body wide diameter portion 300ba.
Periphery yoke 403, to arrange around the mode of coil 402 outer circumferential side, doubles as the outer cover part of electro-magneto fuel injector 100.The upper end side inner peripheral surface 403a of periphery yoke 403 is connected with the outer circumferential face of the lip part 401c of fixed iron core 401 and fixes.Further, the lower end side inner peripheral surface 403b of periphery yoke 403 is connected with the outer circumferential face of nozzle body wide diameter portion 300ba and fixes.
Movable core 404 is configured with in the side, underpart of fixed iron core 401.The end face 404a of movable core 404 is opposed with the end face 401a of fixed iron core 401.Further, the outer circumferential face of movable core 404 is opposed across small gap with the inner peripheral surface of nozzle body wide diameter portion 300ba, and movable core 404 is set in the inner side of nozzle body wide diameter portion 300ba to move up in the side of centrally axis 100a.
The recess 404c from 404b side, 404a side direction lower end surface, upper-end surface depression is formed at the central part of movable core 404.The through through hole 404d to lower end surface 404b on the direction of centrally axis 100a is formed in the bottom surface of recess 404c.Plunger rod 102 is provided with in the mode of inserting through hole 404d.Movable core 404 and plunger rod 102 are configured to can relative displacement on the direction of centrally axis 100a.Be provided with by the bottom surface opening of recess 404c and the through fuel passage 101d formed to the through hole of lower end surface 404b around the through hole 404d of movable core 404.
Plunger rod 102 is by the first spring 405 to valve closing direction (lower direction) force, and the spool 303 formed in underpart contacts with valve seat 301b.Therefore, the upper end portion of the first spring 405 abuts with the lower end surface of spring force adjustment member 406, and the underpart of the first spring 405 abuts with the upper-end surface of wide diameter portion 102a of the upper end portion being formed in plunger rod 102.Movable core 404 is by the second spring members 407 to valve opening position (upper direction) force, and the bottom surface of recess 404c contacts with the lower end surface of the wide diameter portion 102a of plunger rod 102.Therefore, the upper end portion of the second spring members 407 abuts with the lower end surface 404b of movable core 404, and the underpart of the second spring members 407 abuts with the seat surface 408a of spring seat member 408.
The active force of the first spring 405 is set as larger than the active force of the second spring 407.Therefore, spool 303 can maintain the state contacted with valve seat 301b.On the other hand, movable core 404 utilizes the wide diameter portion 102a of plunger rod 102 to limit towards the displacement of valve opening position.In the present embodiment, said structure is adopted to be transmitted to movable core 404 via plunger rod wide diameter portion 102a by the active force of the first spring 405, and the active force of the valve opening position that movable core 404 is born, the i.e. active force of the second spring 407 and the magnetic attracting force of fixed iron core 401, transmit to plunger rod 102 via movable core 404.
In order to regulate the active force of the first spring 405, in the hollow part 201c of fuel pipe 201, be provided with spring force adjustment member 406.Further, the lower portion of the first spring 405 is configured in the through hole 401b of fixed iron core 401, and upper portion is configured in the hollow part 201c of fuel pipe 201.First spring 405 and spring force adjustment member 406 are configured in fuel passage 101a, 101c, are configured with fuel passage 101b at the central part of spring force adjustment member 406.
Above-mentioned fixed iron core 401, coil 402 and periphery yoke 403, form electromagnet movable core 404 being produced to magnetic attracting force.
Through hole 408b through on the direction of centrally axis 100a is formed at the central part of above-mentioned spring seat member 408.Through hole 408b forms the guide surface of the upper end side of plunger rod 102, guides the movement of the plunger rod 102 on the direction (open and close valve direction) of centrally axis 100a.Fuel passage 101e is formed at spring seat member 408.
Coil 402 is assemblied in the outer circumferential side of fixed iron core 401 and nozzle body wide diameter portion 300ba with the state being wound in bobbin, and around it, molding has resin material.Utilize the resin material used in this molding to be formed with connector 105, this connector 105 has the terminal 104 of drawing from coil 402.
Next the action of electro-magneto fuel injector 100 is described.
Under the state that coil 402 is not energized, utilize the active force to the first spring members that plunger rod 102 exerts a force to valve closing direction, spool 303 abuts and valve closing with valve seat 301b.This state is called valve closing state of rest.Now, movable core 404 is exerted a force to valve opening position by the second spring members 407, and the bottom surface of recess 404c abuts with plunger rod wide diameter portion 102a.Movable core 404 is limited towards the displacement of valve opening position by plunger rod wide diameter portion 102a, and generates the space corresponding with the stroke of spool 303 between upper-end surface 404a with fixed iron core lower end surface 401a.
When coil 402 is energized, then the electromagnet be made up of fixed iron core 401, coil 402 and periphery yoke 403 is utilized to produce magnetic flux.This magnetic flux in fixed iron core 401 (containing lip part 401c), periphery yoke 403, nozzle body wide diameter portion 300ba and the movable core 404 formed around coil 402 with annular flow.Now, can act on magnetic attracting force between movable core upper-end surface 404a and fixed iron core lower end surface 401a, movable core 404 is attracted to fixed iron core 401.Plunger rod 102 is by movable core 404 pull-up, and the valve portion 301a of spool 303 leaves from valve seat 301b.Thus, the fuel passage between spool 303 and valve seat 301b is open.
When movable core upper-end surface 404a abuts with fixed iron core lower end surface 401a, then movable core upper-end surface 404a is in the state that is adsorbed in fixed iron core lower end surface 401a and stops mobile, and plunger rod 102 continues the movement to valve opening position.Soon, the movement that plunger rod 102 cannot continue to valve opening position because of the active force of the first spring members 405, and pushed back to valve closing direction by the first spring members 405.Abutted with the bottom surface of movable core recess 404c by the lower end surface of the plunger rod wide diameter portion 102a of plunger rod 102 pushed back to valve closing direction and remain static.This state is called valve opening state of rest.Further, by from starting to be energized from during being called valve opening action during valve closing state of rest is to valve opening state of rest.
If interdict the energising to coil 402 under valve opening state of rest, then between movable core upper-end surface 404a and fixed iron core lower end surface 401a, magnetic attracting force reduces, if the active force of the first spring members than this magnetic attracting force and the second spring members 407 active force make a concerted effort large, then plunger rod 102 and movable core 404 start to move to valve closing direction.When the valve portion 301a of spool 303 abuts with valve seat 301b, then plunger rod 102 stops the movement to valve closing direction.After this movable core 404 also continues the movement to valve closing direction, but the movement that then cannot continue to valve closing direction because of the active force of the second spring members 407 soon.And then movable core 404 is pushed back to valve opening position by the second spring members 407, the bottom surface of movable core recess 404c abuts and remain static (valve closing state of rest) with the lower end surface of plunger rod wide diameter portion 102a.Under this valve closing state of rest, the fuel passage between spool 303 and valve seat 301b is closed.
In the present embodiment, plunger rod 102 and movable core 404 electro-magneto fuel injector of relative displacement can be illustrated, but also can be plunger rod 102 structure fixing with movable core 404.Or, plunger rod 102 and movable core 404 also can be other can the structure of relative displacement.Further, the electromagnet be made up of fixed iron core 401, coil 402 and periphery yoke 403 also can be the structure different from the present embodiment.
Next Fig. 3 to Figure 12 is utilized to be described manufacture method.Especially the processing method as manufacture method tool characteristic fuel orifice 301n and recess 301o is described.Fig. 3 is the flow chart of the operation representing fabricate fuel spray-hole 301n and recess 301o in spray-hole forming member 301.Fig. 4 is the figure of the blank (semi-finished product) represented for fabricate fuel spray-hole 301n and recess 301o.Fig. 5 is the sectional view of the V-V section representing Fig. 4.Fig. 6 is the sectional view of the machining state representing the manufacturing procedure S2 shown in Fig. 3.Fig. 7 is the sectional view of the machining state representing the manufacturing procedure S3 shown in Fig. 3.Fig. 8 be represent the manufacturing procedure S3 shown in Fig. 3 till the stereogram of the outward appearance of the semi-finished product 301 ' (spray-hole forming member 301) of state that terminates.Fig. 9 is the sectional view of the IX-IX section representing Fig. 8.Figure 10 is the sectional view spray-hole forming member 301 of the state terminated to the manufacturing procedure S6 shown in Fig. 3 being represented to the section same with Fig. 9.Figure 11 is the ideograph be described the water jet laser beam machining of fuel orifice 301n.Figure 12 is the sectional view spray-hole forming member 301 of the finishing stage terminated to the manufacturing procedure S8 shown in Fig. 3 being represented to the section same with Fig. 9.
The semi-finished product 301 ' of spray-hole forming member 301 are prepared in manufacturing procedure S1.These semi-finished product 301 ' shown in Fig. 4 and Fig. 5.In addition, turn upside down relative to Fig. 1 and Fig. 2 in Fig. 4 and Fig. 5, but " on " D score all the time with Fig. 1 and Fig. 2 for benchmark.The explanation of Fig. 6 to Figure 11 described later is also same.
Semi-finished product 301 ' are formed inner peripheral surface 301c, stepped part 301d in the concave shape portion 301b of upper-end surface 301a and inner side, inner circumferential wall 301e and relief portion 301h.Further, outer circumferential face 301i, end face (lower end surface) 301j, curved face part (or sphere portion) 301k is formed in the outside of semi-finished product 301 '.
In semi-finished product 301 ', do not complete the valve seat forming valve seat 301b and form face 301g, face 301g ' is formed to the valve seat of unfinished state and implements roughing.Certainly, fuel orifice 301 and recess 301o is not formed.Although semi-finished product 301 ' do not complete valve seat form face 301g, define bottom tube-like.This semi-finished product 301 ' can be made by cutting or plastic working.
In manufacturing procedure S2, as shown in Figure 6, semi-finished product 301 ' are placed in the upper surface of punch die 401, and with spring collet 402 strong keep periphery.In addition, extrude the planar surface portion 301p of curved face part 301k periphery with the blade part 403a of drift 403, punch process is carried out to positioning hole 301qa (with reference to Fig. 8).Similarly positioning hole 301qb and type are differentiated that hole 301qc processes.
Next, in manufacturing procedure S3, as shown in Figure 7, keeping, under the state clamping semi-finished product 301 ', extruding the outer surface of curved face part 301k with the blade part 404a of drift 404, recess 301o punch process is blind hole shape by curved face part 301k.Now, by being blind hole shape by recess 301o punch process, the valve seat to unfinished state forms face 301g ' side extruded material and is formed and extrude portion 301r '.By carrying out punch process to recess 301o, the inner peripheral surface 301oa of recess 301o is processed into full shear plane, can the little recess 301o of forming surface roughness.
Recess 301o carries out punch process according to the number of fuel orifice 301n.Possess 6 fuel orifice 301n in the present embodiment, therefore 6 punch process are carried out to recess 301o.Both that can be 1 also can be the number of fuel orifice 301n beyond 6 is multiple.
The central axis of fuel orifice 301n has relative to central axis 100a the angle of inclination that is greater than 0 ° and tilts.The central axis of recess 301o is consistent with the central axis of fuel orifice 301n, and therefore in order to carry out punch process to recess 301o, the mode that drift 404 has angle of inclination Ap with its central axis 404b relative to central axis 100a is crimped on curved face part 301k.And between multiple fuel orifice 301n, the angle of inclination of central axis is different.
Therefore, angle of inclination Ap is regulated respectively to each fuel orifice 301n.
Stage after manufacturing procedure S3 terminates, the outward appearance that semi-finished product 301 ' are such in Fig. 8.
Next, in manufacturing procedure S4, by cutting, face 301g ' is formed to valve seat and carry out roughing, the portion that the extrudes 301r ' formed in manufacturing procedure S3 is removed.In stage after manufacturing procedure S4 terminates, the IX-IX section of Fig. 8 becomes the section shape shown in Fig. 9.Now, the valve seat defining unfinished state forms face 301g ".
Next, in manufacturing procedure S5, quenching processing is carried out to semi-finished product 301 ' and improves hardness.By this quenching, the resistance to abrasion that the valve seat after completing forms face 301g improves.
Next, in manufacturing procedure S6, face 301g is formed to valve seat " carry out fine finishing (cutting) and complete valve seat formation face 301g.By this fine finishing, circularity and the surface roughness of valve seat formation face g improve and can guarantee high oil-tightness.Valve seat forms face g conically shape, is configured with the circular valve seat 301b abutted with the valve portion 303a of spool 303 in the way of the top and bottom of conical side surface.
In stage after manufacturing procedure S6 terminates, the IX-IX section of Fig. 8 becomes the section shape shown in Figure 10.
At the end of manufacturing procedure S6, then perform the manufacturing procedure of fuel orifice 301n.The manufacturing procedure of fuel orifice 301n performs in manufacturing procedure S7 and manufacturing procedure S8.
Manufacturing procedure S7 is utilizing water jet laser 500 to perform the front operation of processing through hole 301n ' in advance at the position of the fuel orifice 301n forming semi-finished product 301 ' of fine finishing (manufacturing procedure S8).Also on the books at patent documentation 1, then laser power is little and be difficult to be formed through hole to adopt the water jet laser of path, and the circularity, cylindricity etc. in the water jet laser adopting large footpath then hole can deteriorations.And think, when increasing laser power, surface roughness (surface accuracy) then can be caused to worsen.Therefore, by forming through hole 301n ' and utilizing the working surface of water jet laser 500 couples of through hole 301n ' of path to carry out fine finishing, thus the machining accuracy (circularity, cylindricity, surface roughness etc.) of fuel orifice 301n is improved.
In addition, in the present embodiment to using the water jet laser 500 of water to be illustrated, but also the liquid beyond water can be used.When using the liquid beyond water, the term used in this manual " water " is described as " liquid ".
In manufacturing procedure S7, at semi-finished product 301 ' upper formation through hole 301n '.The processing of through hole 301n ' is carried out with common laser beam machining (in gas laser beam machining), electric discharge processing, water jet laser beam machining etc.Also processing method in addition can be adopted, but in the upper processing method producing larger stress of semi-finished product 301 ', then restrict by the rigidity of semi-finished product 301 ' as mentioned above, the design at the configuration of fuel orifice or angle of inclination can be caused no longer simple and should avoid.
Next, in manufacturing procedure S8, as shown in figure 11, by water jet laser, fine finishing is carried out to the sidewall of through hole 301n ', and complete fuel orifice 301n.That is, the side wall surface of fuel orifice 301n can be formed by water jet laser 500.The laser beam 501 produced in not shown generating device of laser is by guiding focusing lenses 502 such as optical fiber.The laser beam that focusing lens 502 collects is imported in water container 503 from the window 503a being located at water container (liquid-container) 503.Water container 503 possesses the nozzle 503c of the water jet 500a of water-supplying mouth (liquid supply port) 503b and ejection high pressure.The laser beam be imported in water container 503 is irradiated in the inside of water jet (water column) 500a.Laser beam repeats total reflection phenomenon at the inner face of water jet 500a, and advances with the state be enclosed in water jet 500a.Adopt this processing method, water jet 500a forms parallel-flow beam, therefore make position and the angle change of the parallel-flow beam relative to water jet laser 500 of semi-finished product 301 ', and the fuel orifice 301n with desired diameter, angle of inclination, shape can be formed.Further, the cooling effect inhibitory action of water can be utilized in the heat of semi-finished product 301 ', and reduce the surface roughness of the working surface of fuel orifice 301n.
In stage after manufacturing procedure S8 terminates, the IX-IX section of Fig. 8 becomes the section shape shown in Figure 12.
When utilizing punch process that fuel orifice 301n is processed as full shear plane, after being blind hole shape by fuel orifice 301n extrusion process, utilizing cutting to form face 301g to valve seat carrying out fine finishing (with reference to patent documentation 2).When this processing sequence, overlap can be produced on the opening portion forming face 301g towards valve seat of fuel orifice 301n, therefore need the operation removing this overlap.In the present embodiment, before the manufacturing procedure S7 carrying out fuel orifice 301n processing and manufacturing procedure S8, carry out implementing the accurately machined cutting (manufacturing procedure S6) that valve seat forms face 301g.In the present embodiment, processed by water jet laser 500 couples of fuel orifice 301n, thus processing can be carried out while clean working surface with water jet to fuel orifice 301n.Therefore, adopt the order of manufacturing procedure S6, manufacturing procedure S7 and manufacturing procedure S8 then without the need to removing the operation of overlap.
In order to cancel the operation removing overlap, also after manufacturing procedure S6, only manufacturing procedure S8 can be performed.Therefore, also can carry out according to the order of manufacturing procedure S7, manufacturing procedure S6 and manufacturing procedure S8.Further, manufacturing procedure S7 is also non-essential sometimes.Now, can not manufacturing procedure S7 be performed and perform according to the order of manufacturing procedure S6, manufacturing procedure S8.In this situation, without the need to the roughing of fuel orifice 301n, and water jet laser 500 is utilized to form the side wall surface of fuel orifice 301n.In the present embodiment, the particularly important is and do not change this order of three of manufacturing procedure S3, manufacturing procedure S6 and manufacturing procedure S8 and perform, other manufacturing procedure then can be omitted as required.Or, also can add other the manufacturing procedure do not recorded in Fig. 3.
In the Fuelinjection nozzle manufactured with the manufacture method of the present embodiment, the recess 301o formed by punch process is exposed to the outer surface of spray-hole forming member 301, but the less and sediments of the surface roughness of this working surface is difficult to attachment.The surface roughness of the fuel orifice 301n formed by water jet laser beam machining is larger than the surface roughness of recess 301o, but the value that surface roughness becomes less can be made, and can prevent sediments from adhering to owing to being undertaken cleaning by fuel injection all the time.
By water jet laser beam machining the bottom surface of recess formed fuel orifice 301n time, under the state that the rigidity of spray-hole forming member 301 reduces, larger load can not be acted in spray-hole forming member 301, avoid producing larger stress in spray-hole forming member 301, therefore the configuration of fuel orifice 301n and the design freedom at angle of inclination improve.
Further, even if utilize electric discharge processing to process fuel orifice 301n, also can prevent the larger load of punch process etc. from acting on semi-finished product 301 '.But temperature is too high and surface roughness that the is working surface of fuel orifice 301n easily worsens in electric discharge processing.Especially as the structure of the present embodiment, form multiple fuel orifice 301n, and then when the recess 301o that its export department formation diameter is larger than fuel orifice 301n, then the sectional area of heat dissipation path diminishes.The temperature that guiding discharge machining causes thus rises and increases and the deterioration of the surface roughness of working surface.Further, when processing multiple fuel orifice, be in high temperature with semi-finished product 301 ' and the state that thermal distortion occurs one by one fabricate fuel spray-hole time, then the machining accuracy of fuel orifice likely can be caused to reduce.By utilizing water jet laser beam machining to process fuel orifice 301n, thus above-mentioned problem can be solved.
The example of Figure 13 to Figure 15 to fuel orifice 301n is utilized to be described.Figure 13 illustrates the first case of fuel orifice 301n.Figure 14 illustrates the second case of fuel orifice 301n.Figure 15 illustrates the 3rd example of fuel orifice 301n.
In the first case shown in Figure 13, fuel orifice 301n and recess 301o is identical with said structure.Fuel orifice 301n is formed from inlet opens 301na to exit opening 301nb by the straight circular hole of constant diameter.
When forming this routine this fuel orifice 301n, the axis angle of water jet laser 500 is constant, and in the circumference of fuel orifice 301n, make the axis of water jet laser 500 relatively mobile relative to semi-finished product 301 '.In this situation, either party that both can make the axis of water jet laser 500 and semi-finished product 301 ' moves, and two sides also can be made to move.Or the state that also axis of water jet laser 500 can be kept fixing according to condition, forms the fuel orifice 301n identical with the diameter of water jet laser 500.
In the fuel orifice 301n of this example, peel off (600a, 600b) in the flowing of inlet opens 301na fuel, therefore the diameter of the essence of fuel orifice 301n is the D ' (Φ D ' < Φ D) less than the dimension D of true form.Therefore, in the fuel orifice 301n of this example, the jet velocity of fuel accelerate and the arrival that there is injected fuel spray apart from elongated tendency.
In Fuelinjection nozzle, in order to control arrival distance (range) of injected fuel spray, need the ratio (L/D) of the length L of fuel orifice to diameter D to be adjusted to appropriate value.Especially in order to avoid fuel to adhere in the cylinder wall surface forming firing chamber or piston face when firing chamber inner direct fuel, or in sucking pipe, when burner oil, avoid fuel to adhere on sucking pipe internal face, it is desirable to spray arrival apart from short (low range) injected fuel spray.Fuel orifice 301n shown in Figure 14 and Figure 15 arrives the concrete example apart from the fuel orifice of short injected fuel spray for realizing.
In the second case shown in Figure 14, fuel orifice 301n is from inlet opens 301na towards exit opening 301nb undergauge.Recess 301o is identical with said structure.Spray after the fuel of valve seat formation face 301g inflow fuel orifice 301n radially flows compressively among fuel orifice 301n.Radial diffusion component dies down slightly, but due to make the length L of fuel orifice 301n be fuel not by the length of complete rectification, therefore can remain radial diffusion component.In this situation, jet velocity slows down, and result to shorten the arrival distance of spraying.
When forming this routine this fuel orifice 301n, the axis of water jet laser 500 is tilted relative to the central axis 301nd of fuel orifice 301n.Further, semi-finished product 301 ' can be rotated centered by the central axis 301nd of fuel orifice 301n relative to the axis of water jet laser 500 to process.In addition, also fixing and mobile for semi-finished product 301 ' water jet laser 500 can be processed.But, if mobile water jet laser 500, then there is the possibility that water jet 500a gets muddled, and the possibility that the machining accuracy that there is fuel orifice 301n worsens.Therefore, can think that it is comparatively real for making semi-finished product 301 ' position and angles shifts carry out processing.
In the 3rd example shown in Figure 15, fuel orifice 301n oval in shape.Although recess 301o also can be circular hole, oval in shape is then better ordinatedly with fuel orifice 301n.The diameter (D) of the fuel orifice of this example have employed the equal diameter of a circle D of the ellipse area (long limit is a13 in this example, minor face is b13) of area and the inlet opens 301na of fuel orifice.The area of this ellipse is minimum area in fuel orifice 301n.Further, ellipse area is from entrance 301na to exit opening 301nb, and the sectional area in hole increases gradually.
When adopting the structure of this example, relative to the fluid that the upstream forming face 301g from valve seat flows into, inlet opens 301na perforate significantly, therefore can suppress to peel off compared with during positive round.From inlet opens 301na flow into fuel among fuel orifice 301n towards radial diffusion flow after spray.Thereby, it is possible to increase radial diffusion composition, and reduce to spray axial jet velocity, therefore, it is possible to the spraying shortening Fuelinjection nozzle further arrives distance.
The fuel orifice 301n of this example, in the same manner as second case, can make the axis of water jet laser 500 process obliquely relative to the central axis 301nd of fuel orifice 301n.
In addition, as long as the spray-hole recess sediments of the present embodiment is difficult to adhere to, and generally punch process can be adopted.As long as sediments can be avoided to become problem by carrying out surface treatment etc., then also can be processed recess 301o by cutting or electric discharge processing.In addition, as long as the processing method of the performance equal with punch process can be realized, this processing method just can be utilized to process recess 301o, and utilize water jet laser beam machining to process aperture (fuel orifice).
In addition, the invention is not restricted to the various embodiments described above and comprise various variation.Such as above-described embodiment describes in detail in order to easy understand the present invention, is not limited to possess whole structures.Further, a part for the structure of certain embodiment can be replaced into the structure of another embodiment, and the structure of another embodiment can be added to the structure of certain embodiment.Further, for a part for the structure of each embodiment, can carry out other structures add, delete, displacement.
Symbol description
301-spray-hole forming member; 301 '-semi-finished product; 301g-valve seat forms face; 301g ', 301g "-unfinished state valve seat form face; 301n-fuel orifice; The fuel orifice of 301n '-unfinished state; 301o-recess, 301r '-extrude portion; 403,404-drift; 500-water jet laser; 500a-water jet; 501-laser beam; 502-focusing lens; 503-water container (liquid-container); 503a-window; 503b-water-supplying mouth (liquid supply port); 503c-nozzle; S1 ~ S8 manufacturing procedure.
Claims (7)
1. a manufacture method for Fuelinjection nozzle, this Fuelinjection nozzle has: the recess being formed in the surface of spray-hole forming member; And to offer outlet in the inner side of above-mentioned recess and offer the fuel orifice of entrance at the back side of above-mentioned spray-hole forming member, the feature of the manufacture method of above-mentioned Fuelinjection nozzle is,
Perform following operation: the recess manufacturing procedure being formed above-mentioned recess by punch process; And after above-mentioned recess manufacturing procedure, the fuel orifice manufacturing procedure of above-mentioned fuel orifice is formed by water jet laser beam machining.
2. the manufacture method of Fuelinjection nozzle according to claim 1, is characterized in that,
Between above-mentioned recess manufacturing procedure and above-mentioned fuel orifice manufacturing procedure, perform valve seat form face manufacturing procedure, it is form the valve seat being provided with the valve seat abutted for spool to form face at the back side of above-mentioned spray-hole forming member that this valve seat forms face manufacturing procedure.
3. the manufacture method of Fuelinjection nozzle according to claim 2, is characterized in that,
The entrance of the fuel orifice processed in above-mentioned fuel orifice manufacturing procedure is opened on above-mentioned valve seat formation face.
4. the manufacture method of Fuelinjection nozzle according to claim 3, is characterized in that,
In above-mentioned recess manufacturing procedure, punch process is carried out to multiple recess, process respectively by the side wall surface of water jet laser beam machining to above-mentioned fuel orifice on above-mentioned multiple recess in above-mentioned fuel orifice manufacturing procedure.
5. a Fuelinjection nozzle, it has: the recess being formed in the surface of spray-hole forming member; And to offer outlet in the inner side of above-mentioned recess and offer the fuel orifice of entrance at the back side of above-mentioned spray-hole forming member, the feature of above-mentioned Fuelinjection nozzle is,
Possess: the above-mentioned recess formed by punch process; And by above-mentioned fuel orifice that water jet laser beam machining is formed.
6. Fuelinjection nozzle according to claim 5, is characterized in that,
The entrance of above-mentioned fuel orifice is opened on above-mentioned valve seat formation face.
7. Fuelinjection nozzle according to claim 6, is characterized in that,
Possess multiple above-mentioned recess, and possess multiple above-mentioned fuel orifice formed one by one respectively on multiple above-mentioned recess.
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| CN201710632129.8A CN107313884B (en) | 2013-04-23 | 2014-03-05 | The manufacturing method of fuel injection valve |
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| JP2013-090139 | 2013-04-23 | ||
| JP2013090139A JP6039492B2 (en) | 2013-04-23 | 2013-04-23 | Fuel injection valve and manufacturing method thereof |
| PCT/JP2014/055539 WO2014174906A1 (en) | 2013-04-23 | 2014-03-05 | Fuel injection valve and production method thereof |
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| CN108547710A (en) * | 2018-02-13 | 2018-09-18 | 上海柯来浦能源科技有限公司 | A kind of direct-injection gas nozzle and its engine and dynamical system |
| CN110030135A (en) * | 2018-01-11 | 2019-07-19 | 罗伯特·博世有限公司 | For the valve of dosage fluid, especially fuel injection valve |
| CN112236590A (en) * | 2018-06-08 | 2021-01-15 | 利勃海尔零部件代根多夫有限公司 | Nozzle for injecting fuel |
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| DE102014226762A1 (en) * | 2014-12-22 | 2016-06-23 | Continental Automotive Gmbh | Nozzle body and fluid injection valve |
| DE102014226770A1 (en) * | 2014-12-22 | 2016-06-23 | Continental Automotive Gmbh | Nozzle body and fluid injection valve |
| US9611824B2 (en) * | 2015-02-18 | 2017-04-04 | Caterpillar Inc. | Process for manufacturing an injector body |
| JP6575559B2 (en) | 2017-04-27 | 2019-09-18 | トヨタ自動車株式会社 | Fuel injection valve |
| JP7206601B2 (en) * | 2018-03-08 | 2023-01-18 | 株式会社デンソー | Fuel injection valve and fuel injection system |
| JP7124351B2 (en) * | 2018-03-08 | 2022-08-24 | 株式会社デンソー | Fuel injection valve and fuel injection system |
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| CN112236590A (en) * | 2018-06-08 | 2021-01-15 | 利勃海尔零部件代根多夫有限公司 | Nozzle for injecting fuel |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014174906A1 (en) | 2014-10-30 |
| CN107313884A (en) | 2017-11-03 |
| CN107313884B (en) | 2019-08-13 |
| JP6039492B2 (en) | 2016-12-07 |
| JP2014214622A (en) | 2014-11-17 |
| CN105143659B (en) | 2017-07-18 |
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