CN104655361A - Detection system and method for knock position in engine cylinder - Google Patents
Detection system and method for knock position in engine cylinder Download PDFInfo
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- CN104655361A CN104655361A CN201510021512.0A CN201510021512A CN104655361A CN 104655361 A CN104655361 A CN 104655361A CN 201510021512 A CN201510021512 A CN 201510021512A CN 104655361 A CN104655361 A CN 104655361A
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- optical fiber
- pinking
- engine cylinder
- observing window
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Abstract
The invention discloses a detection system and method for a knock position in an engine cylinder and belongs to the field of engines. The system comprises a spark plug assembly, a plurality of optical fiber observation windows, an optical fiber communication cable, an optical fiber amplification unit, a photoelectric converter and a computer unit, wherein the spark plug assembly is mounted on the engine cylinder and integrated with spark plugs, and the optical fiber observation windows are uniformly distributed around the spark plugs; each optical fiber observation window is arranged at one end of an optical fiber channel of the optical fiber communication cable, and the other end of the optical fiber channel is connected with a channel of the optical fiber amplification unit; the optical fiber communication cable is used for transmitting multipath optical signals collected by the optical fiber observation windows to the optical fiber amplification unit; the optical fiber amplification unit is used for amplifying the multipath optical signals transmitted by the optical fiber communication cable; the photoelectric converter is used for converting the multipath optical signals amplified by the optical fiber amplification unit into electrical signals; the computer unit is used for judging whether knock occurs in the engine cylinder or not and determining the knock position according to the multipath electrical signals output by the photoelectric converter.
Description
Technical field
The present invention relates to engine art, particularly pinking position detecting system and method in a kind of engine cylinder.
Background technology
Judge the generation of pinking in engine cylinder mainly through two kinds of methods in current engine test exploitation, be a change for in-cylinder pressure when utilizing the cylinder pressure sensor monitoring burning be located in cylinder, the fluctuation of the pressure curve recorded according to cylinder pressure sensor judges pinking; Another utilizes detonation sensor, and the vibrations of the cylinder body caused according to pressure wave during pinking judge the generation of pinking; Can judge whether engine pinking occurs by these two kinds of methods.At present by the knock detection that cylinder pressure sensor and detonation sensor realize, the generation of pinking can only be judged, but can not judge the orientation that in cylinder, pinking occurs, also just can not determine the reason causing pinking further.
Summary of the invention
The problem in the orientation that pinking occurs in cylinder cannot be determined to solve prior art, embodiments providing pinking position detecting system and method in a kind of engine cylinder.Described technical scheme is as follows:
On the one hand, embodiments provide pinking position detecting system in a kind of engine cylinder, described system comprises:
To be arranged on engine cylinder and to be integrated with the spark plug assembly of spark plug, the multiple optical fiber observing windows being evenly distributed on described spark plug surrounding, optical fibre communication line, fiber amplifier unit, photoelectric commutator and computer unit, described optical fiber observing window is located in described engine cylinder, each described optical fiber observing window is separately positioned on one end of an optical-fibre channel of described optical fibre communication line, and the other end of described optical-fibre channel connects a passage of described fiber amplifier unit;
Described optical fibre communication line, transfers to described fiber amplifier unit for the multipath light signal collected by described multiple optical fiber observing window;
Described fiber amplifier unit, amplifies for the multipath light signal transmitted described optical fibre communication line;
Described photoelectric commutator, is converted to electric signal for the multipath light signal after being amplified by described fiber amplifier unit;
Described computer unit, for the multi-channel electric signal exported according to described photoelectric commutator, judges whether pinking occurs in engine cylinder, and pinking position when determining that pinking occurs.
In a kind of implementation of the embodiment of the present invention, described spark plug assembly also comprises sleeve, and described spark plug, described optical fibre communication line and described optical fiber observing window are all located in described sleeve.
In the another kind of implementation of the embodiment of the present invention, described sleeve is provided with mark line, and described mark line aligns with the other electrode in described spark plug.
In the another kind of implementation of the embodiment of the present invention, the observed ray of described optical fiber observing window and the length direction of described spark plug are an acute angle, described observed ray is the direction, straight line place perpendicular to described optical fiber observing window, and the observed ray of multiple described optical fiber observing window radially distributes around described spark plug.
In the another kind of implementation of the embodiment of the present invention, described optical fiber observing window is quartz glass optical fiber observation window.
In the another kind of implementation of the embodiment of the present invention, described system comprises 8 described optical fiber observing windows.
In the another kind of implementation of the embodiment of the present invention, described fiber amplifier unit comprises 2 fiber amplifiers, and each described fiber amplifier comprises 4 passages.
On the other hand, the embodiment of the present invention additionally provides pinking method for detecting position in a kind of engine cylinder adopting the system as above described in any one to realize, and described method comprises:
The multipath light signal that described multiple optical fiber observing window collects is transferred to described fiber amplifier unit;
The multipath light signal that described optical fibre communication line transmits is amplified;
Multipath light signal after being amplified by described fiber amplifier unit is converted to electric signal;
According to the multi-channel electric signal that described photoelectric commutator exports, judge whether pinking occurs in engine cylinder, and pinking position when determining that pinking occurs.
In a kind of implementation of the embodiment of the present invention, the described multi-channel electric signal exported according to described photoelectric commutator, judges whether pinking occurs in engine cylinder, comprising:
Determine the maximum voltage value in multiple described electric signal;
More described maximum voltage value and pre-set threshold value size, if described maximum voltage value is more than or equal to described pre-set threshold value, then determine, in described engine cylinder, pinking occurs.
In the another kind of implementation of the embodiment of the present invention, described pinking position when determining that pinking occurs, comprising:
Determine the numbering of the optical fiber observing window corresponding to the light signal that described maximum voltage value is corresponding;
According to the numbering of optical fiber observing window preset and the corresponding relation of position, determine that the position of the optical fiber observing window collecting light signal corresponding to described maximum voltage value is described pinking position.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
In-engine light signal is gathered by optical fiber observing window, then by fiber amplifier unit and photoelectric commutator, light signal is converted to electric signal, then judge whether pinking occurs in engine according to electric signal, and pinking position when determining that pinking occurs, solve the problem that prior art cannot judge the orientation that pinking occurs in cylinder.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of pinking position detecting system in the engine cylinder that provides of the embodiment of the present invention one;
Fig. 2 is the structural representation of pinking position detecting system in the engine cylinder that provides of the embodiment of the present invention two;
Fig. 3 is the structural representation of the spark plug assembly that the embodiment of the present invention two provides;
Fig. 4 is the structural representation of the sleeve that the embodiment of the present invention two provides;
Fig. 5 is the structural representation of the optical fiber observing window that the embodiment of the present invention two provides;
Fig. 6 is the process flow diagram of pinking method for detecting position in the engine cylinder that provides of the embodiment of the present invention three;
Fig. 7 is the process flow diagram of pinking method for detecting position in the engine cylinder that provides of the embodiment of the present invention four.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiment one
Embodiments provide pinking position detecting system in a kind of engine cylinder, see Fig. 1, this system comprises:
To be arranged on engine cylinder and to be integrated with the spark plug assembly (not shown) of spark plug, the multiple optical fiber observing windows 101 being evenly distributed on spark plug surrounding, optical fibre communication line 102, fiber amplifier unit 103, photoelectric commutator 104 and computer unit 105, optical fiber observing window 101 is located in engine cylinder, each optical fiber observing window 101 is separately positioned on one end of an optical-fibre channel of optical fibre communication line 102, a passage of the other end connecting fiber amplifying unit 103 of optical-fibre channel;
Optical fibre communication line 102, transfers to fiber amplifier unit 103 for the multipath light signal collected by multiple optical fiber observing window 101, and wherein, light signal is that optical fiber observing window 101 collects in cylinder;
Fiber amplifier unit 103, amplifies for the multipath light signal transmitted optical fibre communication line 102;
Photoelectric commutator 104, is converted to electric signal for the multipath light signal after being amplified by fiber amplifier unit 103;
Computer unit 105, for the multi-channel electric signal exported according to photoelectric commutator 104, judges whether pinking occurs in engine cylinder, and pinking position when determining that pinking occurs.
The embodiment of the present invention gathers in-engine light signal by optical fiber observing window, then by fiber amplifier unit and photoelectric commutator, light signal is converted to electric signal, then judge whether pinking occurs in engine according to electric signal, and pinking position when determining that pinking occurs, solve the problem that prior art cannot judge the orientation that pinking occurs in cylinder.
Embodiment two
Embodiments provide pinking position detecting system in a kind of engine cylinder, see Fig. 2 and Fig. 3, this system comprises:
To be arranged on engine cylinder 2 and to be integrated with the spark plug assembly 200 of spark plug 20, the multiple optical fiber observing windows 201 being evenly distributed on spark plug 20 surrounding, optical fibre communication line 202, fiber amplifier unit 203, photoelectric commutator 204 and computer unit 205, each optical fiber observing window 201 is separately positioned on one end of an optical-fibre channel of optical fibre communication line 202, a passage of the other end connecting fiber amplifying unit 203 of optical-fibre channel;
Optical fibre communication line 202, transfers to fiber amplifier unit 203 for the multipath light signal collected by multiple optical fiber observing window 201, and wherein, light signal is that optical fiber observing window 201 collects in cylinder;
Fiber amplifier unit 203, amplifies for the multipath light signal transmitted optical fibre communication line 202;
Photoelectric commutator 204, is converted to electric signal for the multipath light signal after being amplified by fiber amplifier unit 203;
Computer unit 205, for the multi-channel electric signal exported according to photoelectric commutator 204, judges whether pinking occurs in engine cylinder, and pinking position when determining that pinking occurs.
As shown in Figures 3 and 4, spark plug assembly 200 also comprises sleeve 200a, and spark plug 20, optical fibre communication line 202 and optical fiber observing window 201 are all located in sleeve 200a.Wherein, spark plug 20 comprises central electrode 20a and other electrode 20b.Multiple optical fiber observing window 201 is uniformly distributed in around central electrode 20a.
Further, sleeve 200a is provided with mark line 200b, and mark line 200b aligns with the other electrode 20b in spark plug 20.During spark plug 20 installation process, ensure that mark line 200b and other electrode 20b is in same plane, spark plug 20 is arranged on engine cylinder 2, can determine the position of other electrode 20b, thus judges each position corresponding to optical fiber observing window 201.
Further, the observed ray of optical fiber observing window 201 and the length direction of spark plug 20 press from both sides an acute angle, observed ray is the direction, straight line place at the center perpendicular to optical fiber observing window 201, and the observed ray of multiple optical fiber observing window 201 radially distributes around spark plug 20.This acute angle can be 60 degree, better can gather the light signal of each position around casing wall in detecting engine cylinder 2 in engine operation process.Wherein, the optical-fibre channel of optical fibre communication line 202 is extended bottom engine cylinder 2 by spark plug assembly 200.Particularly, after engine ignition work, the flame of normal combustion starts to propagate, if in flame propagation process, in engine cylinder 2, temperature, pressure raises too fast, and after reaching certain condition, dieseling appears in detonation point, namely pinking occurs.Now, the multiple optical fiber observing windows 201 be distributed in around central electrode 20a collect the light signal of different directions, the light signal collected is transferred to fiber amplifier unit 203 by optical fibre communication line 202, after fiber amplifier unit 203 and photoelectric commutator 204 process, input computer unit 205, according to the signal received, computer unit 205 judges whether pinking and pinking position occur in engine cylinder.
In embodiments of the present invention, optical fiber observing window 201 is made up of high-purity, the high grade of transparency, high temperature high-pressure resistant material.Preferably, optical fiber observing window 201 can be quartz glass optical fiber observation window.
As shown in Figure 5, in order to ensure the precision observed, and match with the optical-fibre channel quantity of optical fibre communication line 202, this system can comprise 8 optical fiber observing windows 201.
Further, because conventional fiber amplifier is 4 passages, therefore fiber amplifier unit 203 can comprise 2 fiber amplifier 203a, and each fiber amplifier 203a comprises 4 passages.Certainly, for the fiber amplifier of other port numbers, then the fiber amplifier quantity in this fiber amplifier unit 203 can be determined according to actual conditions.
Further, computer unit 205, for determining the maximum voltage value in multi-channel electric signal, compares maximum voltage value and pre-set threshold value size, in engine cylinder, pinking occurs if determine when maximum voltage value is more than or equal to pre-set threshold value; If when maximum voltage value is less than pre-set threshold value, determine, in engine cylinder, pinking does not occur; The numbering of the optical fiber observing window corresponding to the light signal that maximum voltage value is corresponding is determined when there is pinking; According to the numbering of optical fiber observing window preset and the corresponding relation of position, determine that the position of the optical fiber observing window collecting light signal corresponding to maximum voltage value is pinking position.
Wherein, pre-set threshold value according to test of many times, can draw in advance.
The concrete reason of pinking is gone out to cause according to pinking position analysis, as influence factors such as design of Cooling System defect, air-flow operation problem, firing chamber hot issues, carry out design according to pinking reason and improve, thus ignition phase can be improved, improve the output performance of engine, reduce oil consumption.
Particularly, computer unit 205 can be desktop computer, notebook computer or other types computing machine.
The embodiment of the present invention gathers in-engine light signal by optical fiber observing window, then by fiber amplifier unit and photoelectric commutator, light signal is converted to electric signal, then judge whether pinking occurs in engine according to electric signal, and pinking position when determining that pinking occurs, solve the problem that prior art cannot judge the orientation that pinking occurs in cylinder.
Embodiment three
Embodiments provide pinking method for detecting position in a kind of engine cylinder, the method adopts the system in embodiment one or two to realize, and see Fig. 6, the method comprises:
Step 301: the multipath light signal that multiple optical fiber observing window collects is transferred to fiber amplifier unit.
Step 302: the multipath light signal of optical fibre communication line transmission is amplified.
Step 303: the multipath light signal after being amplified by fiber amplifier unit is converted to electric signal.
Step 304: the multi-channel electric signal exported according to photoelectric commutator, judges whether pinking occurs in engine cylinder, and pinking position when determining that pinking occurs.
The embodiment of the present invention gathers in-engine light signal by optical fiber observing window, then by fiber amplifier unit and photoelectric commutator, light signal is converted to electric signal, then judge whether pinking occurs in engine according to electric signal, and pinking position when determining that pinking occurs, solve the problem that prior art cannot judge the orientation that pinking occurs in cylinder.
Embodiment four
Embodiments provide pinking method for detecting position in a kind of engine cylinder, the method adopts the system in embodiment one or two to realize, and see Fig. 7, the method comprises:
Step 401: the multipath light signal that multiple optical fiber observing window collects is transferred to fiber amplifier unit.
Step 402: the multipath light signal of optical fibre communication line transmission is amplified.
Step 403: the multipath light signal after being amplified by fiber amplifier unit is converted to electric signal.
Step 404: determine the maximum voltage value in multi-channel electric signal, compares maximum voltage value and pre-set threshold value size, if maximum voltage value is more than or equal to pre-set threshold value, then determines, in engine cylinder, pinking occurs, and performs step 405 and 406; If maximum voltage value is less than pre-set threshold value, then determine, in engine cylinder, pinking does not occur.
Wherein, pre-set threshold value according to test of many times, can draw in advance.
Step 405: the numbering determining the optical fiber observing window corresponding to the light signal that maximum voltage value is corresponding when there is pinking.
Step 406: according to the numbering of optical fiber observing window preset and the corresponding relation of position, determines that the position of the optical fiber observing window collecting light signal corresponding to maximum voltage value is pinking position.
The concrete reason of pinking is gone out to cause according to pinking position analysis, as influence factors such as design of Cooling System defect, air-flow operation problem, firing chamber hot issues, carry out design according to pinking reason and improve, thus ignition phase can be improved, improve the output performance of engine, reduce oil consumption.
The embodiment of the present invention gathers in-engine light signal by optical fiber observing window, then by fiber amplifier unit and photoelectric commutator, light signal is converted to electric signal, then judge whether pinking occurs in engine according to electric signal, and pinking position when determining that pinking occurs, solve the problem that prior art cannot judge the orientation that pinking occurs in cylinder.
It should be noted that: in the engine cylinder that above-described embodiment provides, pinking position detecting system is when detecting pinking in engine cylinder, only be illustrated with the division of above-mentioned each functional module, in practical application, can distribute as required and by above-mentioned functions and be completed by different functional modules, inner structure by equipment is divided into different functional modules, to complete all or part of function described above.In addition, in the engine cylinder that above-described embodiment provides, in pinking position detecting system and engine cylinder, pinking method for detecting position embodiment belongs to same design, and its specific implementation process refers to embodiment of the method, repeats no more here.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be ROM (read-only memory), disk or CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a pinking position detecting system in engine cylinder, is characterized in that, described system comprises:
To be arranged on engine cylinder and to be integrated with the spark plug assembly of spark plug, the multiple optical fiber observing windows being evenly distributed on described spark plug surrounding, optical fibre communication line, fiber amplifier unit, photoelectric commutator and computer unit, described optical fiber observing window is located in described engine cylinder, each described optical fiber observing window is separately positioned on one end of an optical-fibre channel of described optical fibre communication line, and the other end of described optical-fibre channel connects a passage of described fiber amplifier unit;
Described optical fibre communication line, transfers to described fiber amplifier unit for the multipath light signal collected by described multiple optical fiber observing window;
Described fiber amplifier unit, amplifies for the multipath light signal transmitted described optical fibre communication line;
Described photoelectric commutator, is converted to electric signal for the multipath light signal after being amplified by described fiber amplifier unit;
Described computer unit, for the multi-channel electric signal exported according to described photoelectric commutator, judges whether pinking occurs in engine cylinder, and pinking position when determining that pinking occurs.
2. system according to claim 1, is characterized in that, described spark plug assembly also comprises sleeve, and described spark plug, described optical fibre communication line and described optical fiber observing window are all located in described sleeve.
3. system according to claim 2, is characterized in that, described sleeve is provided with mark line, and described mark line aligns with the other electrode in described spark plug.
4. system according to claim 2, it is characterized in that, the observed ray of described optical fiber observing window and the length direction of described spark plug are an acute angle, described observed ray is the direction, straight line place perpendicular to described optical fiber observing window, and the observed ray of multiple described optical fiber observing window radially distributes around described spark plug.
5. system according to claim 4, is characterized in that, described optical fiber observing window is quartz glass optical fiber observation window.
6. system according to claim 1, is characterized in that, described system comprises 8 described optical fiber observing windows.
7. system according to claim 1, is characterized in that, described fiber amplifier unit comprises 2 fiber amplifiers, and each described fiber amplifier comprises 4 passages.
8. a pinking method for detecting position in the engine cylinder adopting the system according to any one of claim 1-7 to realize, it is characterized in that, described method comprises:
The multipath light signal that described multiple optical fiber observing window collects is transferred to described fiber amplifier unit;
The multipath light signal that described optical fibre communication line transmits is amplified;
Multipath light signal after being amplified by described fiber amplifier unit is converted to electric signal;
According to the multi-channel electric signal that described photoelectric commutator exports, judge whether pinking occurs in engine cylinder, and pinking position when determining that pinking occurs.
9. method according to claim 8, is characterized in that, the described multi-channel electric signal exported according to described photoelectric commutator, judges whether pinking occurs in engine cylinder, comprising:
Determine the maximum voltage value in multiple described electric signal;
More described maximum voltage value and pre-set threshold value size, if described maximum voltage value is more than or equal to described pre-set threshold value, then determine, in described engine cylinder, pinking occurs.
10. method according to claim 9, is characterized in that, described pinking position when determining that pinking occurs, comprising:
Determine the numbering of the optical fiber observing window corresponding to the light signal that described maximum voltage value is corresponding;
According to the numbering of optical fiber observing window preset and the corresponding relation of position, determine that the position of the optical fiber observing window collecting light signal corresponding to described maximum voltage value is described pinking position.
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| CN201510021512.0A CN104655361B (en) | 2015-01-15 | 2015-01-15 | Detection system and method for knock position in engine cylinder |
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| CN201510021512.0A CN104655361B (en) | 2015-01-15 | 2015-01-15 | Detection system and method for knock position in engine cylinder |
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| CN104655361B CN104655361B (en) | 2017-02-22 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105223372A (en) * | 2015-09-22 | 2016-01-06 | 奇瑞汽车股份有限公司 | Engine cylinder flame velocity of propagation measuring system and measuring method |
| CN105466694A (en) * | 2015-12-03 | 2016-04-06 | 奇瑞汽车股份有限公司 | A detection apparatus integrating cylinder-pressure measurement and soot detection |
| CN106197841A (en) * | 2016-06-27 | 2016-12-07 | 奇瑞汽车股份有限公司 | A kind of electromotor in-cylinder combustion measures system and measuring method thereof |
| CN110895177A (en) * | 2019-09-18 | 2020-03-20 | 南京航空航天大学 | Intelligent pressure sensor system for distributed control of intelligent engine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5763769A (en) * | 1995-10-16 | 1998-06-09 | Kluzner; Michael | Fiber optic misfire, knock and LPP detector for internal combustion engines |
| JP2003157950A (en) * | 2001-11-19 | 2003-05-30 | Ngk Spark Plug Co Ltd | Plug cap and ignition plug unit |
| US6649924B1 (en) * | 1999-09-28 | 2003-11-18 | Avl List Gmbh | Optoelectronic measuring device |
| CN1534281A (en) * | 2003-03-26 | 2004-10-06 | 三菱电机株式会社 | Knocking sensor mounting structure for IC engine and knocking sensor for IC engine |
| CN1908608A (en) * | 2005-08-05 | 2007-02-07 | 通用汽车环球科技运作公司 | Dsp-based engine knock detection including knock sensor and circuit diagnostics |
| CN103292954A (en) * | 2013-04-15 | 2013-09-11 | 西北工业大学 | Device for measuring knocking combustion pressure in millimeter-level circular tube |
-
2015
- 2015-01-15 CN CN201510021512.0A patent/CN104655361B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5763769A (en) * | 1995-10-16 | 1998-06-09 | Kluzner; Michael | Fiber optic misfire, knock and LPP detector for internal combustion engines |
| US6649924B1 (en) * | 1999-09-28 | 2003-11-18 | Avl List Gmbh | Optoelectronic measuring device |
| JP2003157950A (en) * | 2001-11-19 | 2003-05-30 | Ngk Spark Plug Co Ltd | Plug cap and ignition plug unit |
| CN1534281A (en) * | 2003-03-26 | 2004-10-06 | 三菱电机株式会社 | Knocking sensor mounting structure for IC engine and knocking sensor for IC engine |
| CN1908608A (en) * | 2005-08-05 | 2007-02-07 | 通用汽车环球科技运作公司 | Dsp-based engine knock detection including knock sensor and circuit diagnostics |
| CN103292954A (en) * | 2013-04-15 | 2013-09-11 | 西北工业大学 | Device for measuring knocking combustion pressure in millimeter-level circular tube |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105223372A (en) * | 2015-09-22 | 2016-01-06 | 奇瑞汽车股份有限公司 | Engine cylinder flame velocity of propagation measuring system and measuring method |
| CN105223372B (en) * | 2015-09-22 | 2019-01-25 | 奇瑞汽车股份有限公司 | Engine cylinder endogenous fire flame propagation velocity measuring system and measurement method |
| CN105466694A (en) * | 2015-12-03 | 2016-04-06 | 奇瑞汽车股份有限公司 | A detection apparatus integrating cylinder-pressure measurement and soot detection |
| CN106197841A (en) * | 2016-06-27 | 2016-12-07 | 奇瑞汽车股份有限公司 | A kind of electromotor in-cylinder combustion measures system and measuring method thereof |
| CN110895177A (en) * | 2019-09-18 | 2020-03-20 | 南京航空航天大学 | Intelligent pressure sensor system for distributed control of intelligent engine |
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