CN102588052A - SCR (selective catalyst reduction) jetting system - Google Patents
SCR (selective catalyst reduction) jetting system Download PDFInfo
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- CN102588052A CN102588052A CN2012100582944A CN201210058294A CN102588052A CN 102588052 A CN102588052 A CN 102588052A CN 2012100582944 A CN2012100582944 A CN 2012100582944A CN 201210058294 A CN201210058294 A CN 201210058294A CN 102588052 A CN102588052 A CN 102588052A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention relates to an SCR (selective catalyst reduction) jetting system, which comprises an adblue tank, a conveying pump, a pressure storage cavity, a pressure regulating valve, an air storage tank and a nozzle. The nozzle comprises a compressed air inlet and an adblue inlet; an output end of the pressure storage cavity is communicated with the adblue inlet of the nozzle, and an output end of the air storage tank is communicated with the compressed air inlet of the nozzle; the adblue tank comprises a tank body, a pump body is arranged on the tank body, the conveying pump, the pressure storage cavity and the pressure regulating valve are disposed in the pump body, an input end of the conveying pump is communicated with the inside of the tank body, and an output end of the conveying pump is communicated with the pressure storage cavity; and a backflow end of the pressure storage cavity is communicated with the inside of the tank body via the pressure regulating valve. The tank body, the conveying pump, the pressure storage cavity and the pressure regulating valve are integrated, the structure of the SCR jetting system is simplified, arrangement of a total vehicle is more convenient, and cost of the total vehicle is reduced.
Description
Technical field
The present invention relates to exhaust gas purification system for internal combustion engine, especially for diesel exhaust aftertreatment, to reduce the selective catalytic reduction system operating (SCR ejecting system, Selective Catalyst Reduction) of Diesel NOx discharging.
Background technique
To the effulent of Motor Vehicle, people adopt various method means to eliminate the harmful matter that it contains.The SCR technology is to reduce a kind of very effective method of NOx compound.Motor SCR post-processing technology is that the reducing agent urea liquid is sprayed in the engine exhaust, and under the effect of EGT and air-flow, urea liquid can decompose fast and discharges ammonia, and the NOx reduction is become nitrogen, reaches the effect that reduces NOx.Owing to urea liquid has popularization and the use that advantages such as stable performance, simple, the required reducing agent relative quantity of chemical reaction are few obtain people.
International standard ISO22241-1 has stipulated to be used for the quality requirement of the NOx reducing agent AUS32 of diesel engine.This is that a kind of urea content is 32.5% aqueous solution of urea, abbreviates as and adds indigo plant, and its FCTA temprature is-11.5 ℃.
The existing SCR ejecting system generally all is foreign manufacturers produce; It comprises adds blue jar, transfer pump, pressure accumulation chamber, adds blue return-flow system, gas holder, adds cyan nozzle etc.; The indigo plant of adding of preparation is stored in and adds in blue jar, adds blue jar and connects transfer pump through pipeline, adds the blue pressure accumulation chamber that after the transfer pump supercharging, is transported to by the road of adding in blue jar; Wherein part add through pipeline arrive add cyan nozzle after; The gas that provides with gas holder sprays in the engine exhaust pipe, and unnecessary adding bluely gets back to and add blue tank body through adding blue return-flow system in the pressure accumulation chamber, in adding jar, realizes circulating.
Existing SCR ejecting system pipe-line system is very complicated, is not easy to the layout of car load, causes price very high.
In addition, Chinese patent CN101084053A has proposed to reverse by transfer pump adding blue AEI After End of Injection, and the measure on the blue tube road of finding time prevents to add the technological scheme that spray orifice is stopped up in blue crystallization.After adopting this scheme, automobile must rerun a period of time in the parking rear engine, perhaps behind engine cutoff, makes motor and transfer pump reverse a period of time by storage battery; Also need adopt reversible motor and transfer pump, can raise the cost, and practical operation is also very inconvenient.
In order to improve the transformation efficiency of SCR system, need improve the atomization characteristics of ejector spray.The secondary injection of general employing gas; Utilize the interaction of gas and liquid to improve atomizing effect; Traditional atomized spray system adopts liquids and gases in the cavity volume of spray nozzle front end, to mix, and AEI After End of Injection is through the pressurized air purge; Empty the indigo plant of adding in pipeline and the mixing chamber, but the spray orifice position of sparger is still added blue crystallization obstruction spray orifice easily.
Summary of the invention
Technical problem to be solved by this invention is: the SCR ejecting system that a kind of designs simplification is provided.
The present invention solves the problems of the technologies described above the technological scheme that is adopted:
A kind of SCR ejecting system, it comprises adds blue jar, transfer pump, pressure accumulation chamber, pressure regulator valve, gas holder, nozzle; Said nozzle comprises the compressed air inlet, adds blue inlet; The output terminal in pressure accumulation chamber and nozzle add blue inlet UNICOM, the compressed air inlet UNICOM of the output terminal of gas holder and nozzle; Add blue jar and comprise tank body, tank body is provided with the pump housing, and said transfer pump, pressure accumulation chamber, pressure regulator valve are arranged in the pump housing, and the input end of transfer pump and tank interior UNICOM carry delivery side of pump and pressure accumulation chamber UNICOM; The backflow end in pressure accumulation chamber is through pressure regulator valve and tank interior UNICOM.
In the such scheme, the said pump housing is arranged on the top of tank body.
In the such scheme, be provided with output tube and reflow pipe in the tank body, the input end of transfer pump is through output tube and tank interior UNICOM, and the backflow end in pressure accumulation chamber is successively through pressure regulator valve, reflow pipe and tank interior UNICOM.
In the such scheme, transfer pump is an electromagnetic pump.
In the such scheme, also be provided with the circulation heating pipe in the tank body, circulation heating pipe's intake pipe and outlet pipe respectively with the circulation UNICOM of motor.
In the such scheme, said nozzle also comprises metering valve, and metering valve comprises the valve body that shell, Electromagnetic Drive part and Electromagnetic Drive partly drive, and electromagnetic drive part divides setting in the enclosure; Said valve body is a hollow stem, and the lower end of valve body is provided with ball valve, the upper end of valve body with add blue inlet UNICOM, have linked hole on the sidewall of valve body;
Said nozzle also comprises guide pin bushing, and guide pin bushing is enclosed within on the valve body, and the upper end of guide pin bushing is connected with said shell, and the lower inside of guide pin bushing is provided with the valve seat that cooperates with valve ball; Form cavity between guide pin bushing and the valve body, said cavity is through the hollow parts UNICOM of linked hole and valve body; Open on the sidewall of guide pin bushing said compressed air inlet.
In the such scheme, said electromagnetic drive part branch comprises electromagnetic coil and iron core, and iron core is a cylindrical shell, is provided with spring and spring pin in the cylindrical shell, and spring is arranged between spring pin and the valve body upper end.
In the such scheme, metering valve also comprises the tubular guiding element, and guiding element is connected with valve body top, and the outer side surface of guiding element and the inner side surface of guide pin bushing are sealed and matched.
In the such scheme, the upper end of valve body is through iron core and add the blue UNICOM that enters the mouth.
In the such scheme, said valve body, ball valve and guiding element are welded as a whole.
The invention has the advantages that:
1, tank body and transfer pump, pressure accumulation chamber, pressure regulator valve are integrated, have simplified SCR ejecting system structure, and the layout of more convenient car load has reduced integral vehicle cost.
2, the said pump housing is arranged on the top of tank body, help in pressure accumulation chamber and the pipeline add blue under action of gravity natural back flow can exempt under the low temperature freeze damage and add blue pumping system to adding in the blue jar.
3, transfer pump adopts electromagnetic pump as driving power, and volume is little, is convenient to be integrated on the tank body, and control is simple, and is reliable.
4, adopt the circulating water heating of motor to add the urea in blue jar, can also adopt the sleeve pipe mode to heat blue tube, guarantee the reliable operation of system under low temperature environment, and saved electric energy.
5, pressurized gas and add and blue in the cavity between guide pin bushing and the metering valve, mix utilizes pressurized air and adds blue interaction and improve and add blue atomization quality.AEI After End of Injection utilizes the pressurized air purge, removes the indigo plant of adding that remains in nozzle wall surface, adds blue crystallization when preventing low temperature and stops up spray orifice.
6, metering valve also comprises the tubular guiding element, and it is arranged between guide pin bushing and the valve body, can play good sealing and leading role.
Description of drawings
Fig. 1 is the structural representation of SCR ejecting system of the present invention.
Fig. 2 is the sectional view of nozzle.
Among the figure: 1-outlet pipe, 2-nozzle, 201-guiding element, 202-spring, 203-spring pin, 204-metering valve, 205-add blue inlet; The 206-iron core, 207-electrical plug, 208-interface, 209-housing, 210-electromagnetic coil, 211-guide pin bushing, 212-compressed air inlet; The 213-ball valve, 214-valve seat, 215-valve body, 216-linked hole, 3-ECU, 4-air solenoid valve, 5-tank body; 6-adds indigo plant, 7-fill valve, 8-intake pipe, 9-entering water electromagnetic valve, the 10-pump housing, 11-heating pipe, 12-output tube; The 13-filter, 14-transfer pump, 15-pressure accumulation chamber, 16-outer pipe, 17-outlet pipe, 18-pressure regulator valve; The 19-reflow pipe, 20-pressure transducer, 22-temperature transducer, 23-tap hole, 24-gas holder, 25-vacuum solenoid valve.
Embodiment
As shown in Figure 1, SCR ejecting system of the present invention comprises and adds blue jar, transfer pump 24, pressure accumulation chamber 15, pressure regulator valve 18, gas holder 24, nozzle 2, ECU 3; Said nozzle 2 comprises the compressed air inlet, adds blue inlet; The output terminal in pressure accumulation chamber 15 and nozzle add blue inlet UNICOM, the compressed air inlet UNICOM of the output terminal of gas holder 24 and nozzle.The compressed air pressure that stores in the gas holder 24 is 0.8-0.9MPa, is reduced to 0.4MPa through reduction valve 25, and pressurized air is connected to nozzle 2 through air solenoid valve 4.
Add blue jar and comprise tank body 5, the top of tank body 5 is provided with the pump housing 10, is provided with transfer pump 14, pressure accumulation chamber 15 and pressure regulator valve 18 in the pump housing 10; The output terminal of transfer pump 14 and pressure accumulation chamber 15 UNICOMs; Nozzle 2 UNICOMs of the output terminal in pressure accumulation chamber 15 and SCR ejecting system, the backflow end in pressure accumulation chamber 15 is through pressure regulator valve 18 and tank interior UNICOM.Transfer pump is an electromagnetic pump, and pressure regulator valve 18 is a solenoid valve.
As shown in Figure 2, nozzle 2 comprises compressed air inlet 212, adds blue inlet 205 and metering valve 204, and metering valve comprises the valve body 215 that shell 209, Electromagnetic Drive part and Electromagnetic Drive partly drive, and electromagnetic drive part divides setting in the enclosure.Said valve body 215 is a hollow stem, and the lower end of valve body 215 is provided with ball valve 213, the upper end of valve body with add blue inlet 205 UNICOMs, have linked hole 216 on the sidewall of valve body;
Said nozzle 2 also comprises guide pin bushing 211, and guide pin bushing 211 is enclosed within on the valve body 215, and the upper end of guide pin bushing 211 is connected with said shell 209, and the lower inside of guide pin bushing is provided with the valve seat 214 that cooperates with valve ball, the conical bore that said valve seat 214 makes progress for big mouth.Form cavity between guide pin bushing 211 and the valve body 215, said cavity is through the hollow parts UNICOM of linked hole 216 with valve body 215; Open on the sidewall of guide pin bushing 211 said compressed air inlet 212.
Said electromagnetic drive part branch comprises electromagnetic coil 210 and iron core 206, and iron core 206 is a cylindrical shell, is provided with spring 202 and spring pin 203 in the cylindrical shell, and spring 202 is arranged between spring pin 203 and valve body 215 upper ends.The upper end of valve body 215 is through iron core 206 and add blue 205 UNICOMs that enter the mouth.
Metering valve also comprises tubular guiding element 201, and guiding element 201 is connected with valve body 215 tops, and the inner side surface of the outer side surface of guiding element 201 and guide pin bushing 211 is sealed and matched.Said valve body 215, ball valve 213 and guiding element 201 are welded as a whole.
The working principle of nozzle 2 is:
Transfer pump in the SCR system will add indigo plant and be transported in the nozzle 2 through adding blue inlet 201; Endoporus and spring 202 center holes through spring pin 203 get in the valve body 215 on the metering valve 204 earlier, again through in the cavity between 216 entering guide pin bushings 211 of the linked hole on the valve body 215 and the metering valve 204.Pressurized gas 212 gets into nozzles from the compressed air inlet, and adds and bluely in the cavity between guide pin bushing 211 and the metering valve 204, mix.When adding blue the injection, electromagnetic coil 210 powers on.Metering valve 204 overcomes spring force to top offset under the effect of electromagnetic force; Ball valve 213 separates with the conical surface of valve seat 214; Simultaneously the solenoid valve of air compression air is opened, and quantitative pressurized air gets into nozzles 2 by compressed air inlet 212, quantitative add blue and pressurized air under the effect of pressure in spray orifice sprays into outlet pipe 1; With the nitrogen oxides generation reduction reaction in the waste gas, realize purification function.
When spraying end; ECU 3 at first pilot pressure modulating valve 18 is opened; Pressure accumulation chamber 15 internal pressures are reduced to barometric pressure, and pressurized air will get into the blue solution of adding of nozzle 2 and blow back tank body 5 through outer pipe 16, pressure accumulation chamber 15, pressure regulator valve 18, reflow pipe 19, and the blue solution that adds that will get in the cavity between guide pin bushing 211 and the metering valve 204 is blown into outlet pipe 1 from spray orifice; Thereby not only can remove the indigo plant of adding that remains in the nozzle 2, can also empty the indigo plant of adding in pressure accumulation chamber 15 and the outer pipe 16.After removing finishes, 210 outages of ECU 3 control electromagnetic coils, air solenoid valve 4 cuts out simultaneously, and metering valve 204 is return under the effect of spring force, and ball valve 213 is fitted with the conical surface of valve seat 214, adds blue the injection and accomplishes.
Described iron core 206 is cylindrical components of a shoulder shape, its shoulder end and guide pin bushing 211 welding, and circular bead surface is used for the location of guide pin bushing 211.The upper end of iron core is an outside thread, is used to add the installation connection of blue sparger.Iron core 206, guide pin bushing 211, valve body 215, ball valve 213 and valve seat 214 etc. with add blue contacted component by the stainless steel material manufacturing.
The upper end of valve seat 214 be one seal, internal taper hole face that big mouth makes progress, there is a spray orifice at the center of its lower end.Valve seat 214 is coaxial with guide pin bushing 211, and is welded on the guide pin bushing 211.
Described spring pin 203 is angles of circumference less than the metal tube of 360 degree, and the axial position of adjustment spring pin 203 can change the pressure of 202 pairs of metering valves 204 of spring, and the spring pin of adjusting behind the spring pressure is fixed with the welding of iron core inner side surface.
Nozzle pass through joint 208, electrical plug 207 links to each other with the ECU ECU of SCR ejecting system; ECU 3 is according to the signals such as engine load, tach signal and SCR catalytic converter front and rear row temperature of input; Output pulse width modulation signal PWM controls the dutycycle of electromagnetic coil 210, thus injecting times and emitted dose that blue sparger is added in control.
The working principle of SCR system is:
Be provided with output tube 12 and reflow pipe 19 in the tank body 5, the input end of transfer pump 14 is through output tube 12 and tank body 5 inner UNICOMs, and the backflow end in pressure accumulation chamber 15 is successively through pressure regulator valve 18, reflow pipe 19 and tank body 5 inner UNICOMs.
Also be provided with the circulation heating pipe in the tank body 5, circulation heating pipe's intake pipe 8 and outlet pipe 17 respectively with the circulation UNICOM of motor.
The indigo plant of adding by international standard ISO22241-1 preparation is stored in and adds in blue jar, adds bluely to flow into transfer pumps 14 from output tube 12 through filters 13.Add indigo plant and spray in the engine exhaust pipe 1 behind pressure accumulation chamber 15, outer pipe 16 arrival nozzles 2 in transfer pump supercharging rear section, the unnecessary indigo plant of adding is got back in the tank body 5 by adding blue reflow pipe 19 through pressure accumulation chamber 15, pressure regulator valve 18, in tank body 5, realizes circulating.
On the integrated pump housing 10 that adds blue upper end, the heating equipment that utilizes engine cycles water is installed also, the heating pipe assembly is made up of intake pipe 8, entering water electromagnetic valve 9, heating pipe 12, outlet pipe 17 etc.Intake pipe 8 links to each other with engine water pump outlet port circulating water, also is installed into water solenoid valve 9 on the intake pipe 8, and outlet pipe 17 communicates with engine cycles water low voltage terminal.Intake pipe is incorporated into part engine cycles water among the heating pipe 11, carries out heat exchange with the integrated indigo plant of adding of adding in blue jar, the circulating water of high temperature with add indigo plant and carry out getting back to engine water jacket from outlet pipe 17 after the heat exchange and circulate.
Add in blue jar that liquid level sensor 22 being installed, be used to detect the height of liquid level, when liquid level was lower than the minimum liquid level of design, DCU reported to the police according to liquid level information, reminded the driver to add blue filling.
Add in blue jar that pressure transducer 20 and temperature transducer 21 being installed, be used to detect the temperature and pressure that adds indigo plant.Simultaneously, add the tap hole 22 that the band spiral cover is arranged at bottom, blue tank body right side, be used for the impurity in the periodic cleaning casing.The tank body left upper portion has adds blue fill valve 7, is used to add blue filling.
The signal that pressure transducer 20, temperature transducer 21, liquid level sensor 22 record is passed to ECU 3, and ECU 3 obtains the jeting instruction of motor through communication between CAN and the Engine ECU, carries out the injection control of system.Give ECU with the feedback of status of SCR system simultaneously.After ECU 3 receives jeting instruction, open and add cyan nozzle 2, open air solenoid valve 4 simultaneously, measure accurate wellatomized urea liquid and spray in the engine exhaust pipe 1.And when spraying end, transfer pump 14 cuts out, and pressure regulator valve 18 is opened, and pressure accumulation chamber 15 internal pressures are reduced to barometric pressure, adds blue under action of gravity, having got back to and adds blue jar, has emptied the indigo plant of adding in pressure accumulation chamber 15 and the output tube 12.
Add blue outer pipe 16 outsides and be surrounded by heat-insulating material, above-mentioned thermal insulating material adopts the flame retarding foamed plastics.The purpose that coats thermal insulating material is to reduce the energy consumption of adding blue heating equipment.
Claims (10)
1. SCR ejecting system, it comprises adds blue jar, transfer pump, pressure accumulation chamber, pressure regulator valve, gas holder, nozzle; Said nozzle comprises the compressed air inlet, adds blue inlet; The output terminal in pressure accumulation chamber and nozzle add blue inlet UNICOM, the compressed air inlet UNICOM of the output terminal of gas holder and nozzle; It is characterized in that: add blue jar and comprise tank body, tank body is provided with the pump housing, and said transfer pump, pressure accumulation chamber, pressure regulator valve are arranged in the pump housing, and the input end of transfer pump and tank interior UNICOM carry delivery side of pump and pressure accumulation chamber UNICOM; The backflow end in pressure accumulation chamber is through pressure regulator valve and tank interior UNICOM.
2. SCR ejecting system as claimed in claim 1 is characterized in that: the said pump housing is arranged on the top of tank body.
3. SCR ejecting system as claimed in claim 1; It is characterized in that: be provided with output tube and reflow pipe in the tank body; The input end of transfer pump is through output tube and tank interior UNICOM, and the backflow end in pressure accumulation chamber is successively through pressure regulator valve, reflow pipe and tank interior UNICOM.
4. SCR ejecting system as claimed in claim 1 is characterized in that: transfer pump is an electromagnetic pump.
5. SCR ejecting system as claimed in claim 1 is characterized in that: also be provided with the circulation heating pipe in the tank body, circulation heating pipe's intake pipe and outlet pipe respectively with the circulation UNICOM of motor.
6. SCR ejecting system as claimed in claim 1 is characterized in that: said nozzle also comprises metering valve, and metering valve comprises the valve body that shell, Electromagnetic Drive part and Electromagnetic Drive partly drive, and electromagnetic drive part divides setting in the enclosure; Said valve body is a hollow stem, and the lower end of valve body is provided with ball valve, the upper end of valve body with add blue inlet UNICOM, have linked hole on the sidewall of valve body;
Said nozzle also comprises guide pin bushing, and guide pin bushing is enclosed within on the valve body, and the upper end of guide pin bushing is connected with said shell, and the lower inside of guide pin bushing is provided with the valve seat that cooperates with valve ball; Form cavity between guide pin bushing and the valve body, said cavity is through the hollow parts UNICOM of linked hole and valve body; Open on the sidewall of guide pin bushing said compressed air inlet.
7. SCR ejecting system as claimed in claim 6 is characterized in that: said electromagnetic drive part branch comprises electromagnetic coil and iron core, and iron core is a cylindrical shell, is provided with spring and spring pin in the cylindrical shell, and spring is arranged between spring pin and the valve body upper end.
8. SCR ejecting system as claimed in claim 7 is characterized in that: metering valve also comprises the tubular guiding element, and guiding element is connected with valve body top, and the outer side surface of guiding element and the inner side surface of guide pin bushing are sealed and matched.
9. like claim 7 or 8 described SCR ejecting systems, it is characterized in that: the upper end of valve body is through iron core and add the blue UNICOM that enters the mouth.
10. SCR ejecting system as claimed in claim 8 is characterized in that: said valve body, ball valve and guiding element are welded as a whole.
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| CN201210058294.4A CN102588052B (en) | 2012-03-08 | 2012-03-08 | A kind of SCR ejecting system |
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| CN201210058294.4A CN102588052B (en) | 2012-03-08 | 2012-03-08 | A kind of SCR ejecting system |
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| CN102588052B CN102588052B (en) | 2016-01-20 |
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Cited By (16)
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|---|---|---|---|---|
| CN104131868A (en) * | 2013-04-17 | 2014-11-05 | 大陆汽车系统公司 | Reductant delivery unit for automotive selective catalytic reduction with reducing agent heating |
| CN105464762A (en) * | 2014-07-01 | 2016-04-06 | 博世汽车柴油系统有限公司 | Selective catalytic reduction system |
| CN105499011A (en) * | 2016-01-15 | 2016-04-20 | 山东拓普液压气动有限公司 | Oil mist spraying device |
| CN105587383A (en) * | 2014-10-18 | 2016-05-18 | 浙江福爱电子有限公司 | SCR metering module |
| CN106285851A (en) * | 2016-09-22 | 2017-01-04 | 凯龙高科技股份有限公司 | A kind of dosing pump fluid path blow device |
| CN106773670A (en) * | 2016-11-23 | 2017-05-31 | 吉林师范大学 | SCR system method for urea injection control based on constraint H ∞ feedback oscillator arteries and veins staves |
| WO2017114060A1 (en) * | 2015-12-31 | 2017-07-06 | 天纳克（苏州）排放系统有限公司 | Integrated device, tail gas post-processing system and control method |
| CN107131345A (en) * | 2017-06-28 | 2017-09-05 | 浙江鑫业电子科技有限公司 | A kind of urea Unit injector magnetic valve |
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| WO2017211118A1 (en) * | 2016-06-06 | 2017-12-14 | 天纳克（苏州）排放系统有限公司 | Integrated apparatus, exhaust gas post-processing system, and control method |
| WO2017211121A1 (en) * | 2016-06-06 | 2017-12-14 | 天纳克（苏州）排放系统有限公司 | Integrated device, exhaust-gas aftertreatment system, and control method |
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| CN112412590A (en) * | 2020-11-21 | 2021-02-26 | 山东艾泰克环保科技股份有限公司 | Integrated urea box for preventing urea freezing crystallization for automobile |
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| CN104131868A (en) * | 2013-04-17 | 2014-11-05 | 大陆汽车系统公司 | Reductant delivery unit for automotive selective catalytic reduction with reducing agent heating |
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| CN105587383A (en) * | 2014-10-18 | 2016-05-18 | 浙江福爱电子有限公司 | SCR metering module |
| WO2017114060A1 (en) * | 2015-12-31 | 2017-07-06 | 天纳克（苏州）排放系统有限公司 | Integrated device, tail gas post-processing system and control method |
| CN105499011A (en) * | 2016-01-15 | 2016-04-20 | 山东拓普液压气动有限公司 | Oil mist spraying device |
| WO2017211118A1 (en) * | 2016-06-06 | 2017-12-14 | 天纳克（苏州）排放系统有限公司 | Integrated apparatus, exhaust gas post-processing system, and control method |
| WO2017211121A1 (en) * | 2016-06-06 | 2017-12-14 | 天纳克（苏州）排放系统有限公司 | Integrated device, exhaust-gas aftertreatment system, and control method |
| WO2017211120A1 (en) * | 2016-06-06 | 2017-12-14 | 天纳克（苏州）排放系统有限公司 | Integrated device, exhaust-gas aftertreatment system, and control method |
| CN106285851A (en) * | 2016-09-22 | 2017-01-04 | 凯龙高科技股份有限公司 | A kind of dosing pump fluid path blow device |
| CN106773670A (en) * | 2016-11-23 | 2017-05-31 | 吉林师范大学 | SCR system method for urea injection control based on constraint H ∞ feedback oscillator arteries and veins staves |
| CN106773670B (en) * | 2016-11-23 | 2019-08-20 | 吉林师范大学 | SCR system method for urea injection control based on constraint H ∞ feedback oscillator arteries and veins stave |
| WO2018171212A1 (en) * | 2017-03-20 | 2018-09-27 | 天纳克（苏州）排放系统有限公司 | Exhaust gas after-treatment system |
| CN107131345A (en) * | 2017-06-28 | 2017-09-05 | 浙江鑫业电子科技有限公司 | A kind of urea Unit injector magnetic valve |
| CN108266252A (en) * | 2018-03-26 | 2018-07-10 | 浙江爱力浦科技股份有限公司 | A kind of air cooling air-assisted automatic control type urea liquid spraying system |
| CN108425725A (en) * | 2018-03-26 | 2018-08-21 | 浙江爱力浦科技股份有限公司 | A kind of water cooling air-assisted automatic control type urea liquid spraying system |
| CN108425725B (en) * | 2018-03-26 | 2023-12-05 | 浙江爱力浦科技股份有限公司 | Water-cooled air auxiliary type automatic control urea solution injection system |
| CN112412590A (en) * | 2020-11-21 | 2021-02-26 | 山东艾泰克环保科技股份有限公司 | Integrated urea box for preventing urea freezing crystallization for automobile |
| CN112412590B (en) * | 2020-11-21 | 2021-08-27 | 山东艾泰克环保科技股份有限公司 | Integrated urea box for preventing urea freezing crystallization for automobile |
| CN114593263A (en) * | 2022-05-10 | 2022-06-07 | 烟台盈德精密机械有限公司 | Urea pump nozzle electromagnetic valve |
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