CN104655361B - Detection system and method for knock position in engine cylinder - Google Patents

Detection system and method for knock position in engine cylinder Download PDF

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Publication number
CN104655361B
CN104655361B CN201510021512.0A CN201510021512A CN104655361B CN 104655361 B CN104655361 B CN 104655361B CN 201510021512 A CN201510021512 A CN 201510021512A CN 104655361 B CN104655361 B CN 104655361B
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optical fiber
pinking
optical
engine cylinder
observing window
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CN104655361A (en
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王伟
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Chery Automobile Co Ltd
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Chery Automobile Co Ltd
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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

Pinking position detecting system and method in engine cylinder
Technical field
The present invention relates to engine art, particularly to pinking position detecting system and method in a kind of engine cylinder.
Background technology
The main generation judging pinking in engine cylinder by two methods in engine test exploitation at present, one kind is profit The change of in-cylinder pressure when being burnt with the cylinder pressure sensor monitoring in cylinder, the pressure curve being recorded according to cylinder pressure sensor Fluctuate and to judge pinking;Another is to utilize detonation sensor, and the vibrations of the cylinder body being caused according to pressure wave during pinking are sentencing The generation of disconnected pinking;May determine that whether electromotor occurs pinking by both approaches.Current by cylinder pressure sensor and quick-fried The knock detection that shake sensor is realized, can only judge the generation of pinking, but can not judge the orientation that in cylinder, pinking occurs, also just not The reason lead to pinking can be further determined that.
Content of the invention
In order to solve the problems, such as that prior art cannot determine the orientation that pinking in cylinder occurs, embodiments provide one Plant pinking position detecting system and method in 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 includes:
It is arranged on engine cylinder and be integrated with the spark plug assembly of spark plug, be evenly distributed on described spark plug surrounding Multiple optical fiber observing windows, optical fibre communication line, fiber amplifier unit, optical-electrical converter and computer unit, described optical fiber observing Window, in described engine cylinder, one end of each optical-fibre channel of described optical fibre communication line is respectively provided with a described light Fine observation window, the other end of described optical-fibre channel connects a passage of described fiber amplifier unit;
Described optical fibre communication line, the multipath light signal for collecting the plurality of optical fiber observing window transmits to described Fiber amplifier unit;
Described fiber amplifier unit, the multipath light signal for transmitting to described optical fibre communication line is amplified;
Described optical-electrical converter, is converted to the signal of telecommunication for the multipath light signal after amplifying described fiber amplifier unit;
Described computer unit, for the multi-channel electric signal being exported according to described optical-electrical converter, judges in engine cylinder Whether there is pinking, 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 includes sleeve, described spark plug, institute State optical fibre communication line and described optical fiber observing window all in described sleeve.
In another kind of implementation of the embodiment of the present invention, described sleeve is provided with mark line, described mark line and institute State the other electrode alignment in spark plug.
In another kind of implementation of the embodiment of the present invention, the observed direction of described optical fiber observing window and described spark The length direction of plug is in an acute angle, and described observed direction is the straight line place direction perpendicular to described optical fiber observing window, multiple The observed direction of described optical fiber observing window radially distributes around described spark plug.
In another kind of implementation of the embodiment of the present invention, described optical fiber observing window is quartz glass optical fiber observation window Mouthful.
In another kind of implementation of the embodiment of the present invention, described system includes 8 described optical fiber observing windows.
In another kind of implementation of the embodiment of the present invention, described fiber amplifier unit includes 2 fiber amplifiers, often Individual described fiber amplifier includes 4 passages.
On the other hand, the embodiment of the present invention additionally provides a kind of electromotor using the as above system realization described in any one Pinking method for detecting position in cylinder, methods described includes:
The multipath light signal that the plurality of optical fiber observing window is collected transmits to described fiber amplifier unit;
The multipath light signal of described optical fibre communication line transmission is amplified;
Multipath light signal after described fiber amplifier unit is amplified is converted to the signal of telecommunication;
According to the multi-channel electric signal of described optical-electrical converter output, judge whether pinking occurs in engine cylinder, and determine Pinking position when pinking occurs.
In a kind of implementation of the embodiment of the present invention, the described multiple telecommunication according to the output of described optical-electrical converter Number, judge whether pinking occurs in engine cylinder, including:
Determine the maximum voltage value in multiple described signals of telecommunication;
Relatively described maximum voltage value and pre-set threshold value size, if described maximum voltage value is more than or equal to described default valve It is determined that there is pinking in described engine cylinder in value.
In another kind of implementation of the embodiment of the present invention, the described pinking position determining during pinking generation, including:
Determine the numbering of the optical fiber observing window corresponding to the corresponding optical signal of described maximum voltage value;
Numbering according to optical fiber observing window set in advance and the corresponding relation of position, determine and collect described maximum electricity The position that pressure is worth the optical fiber observing window of corresponding optical signal is described pinking position.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is:
In-engine optical signal is gathered by optical fiber observing window, then passes through fiber amplifier unit and optical-electrical converter When converting optical signals to the signal of telecommunication, then judge whether pinking occurs in electromotor according to the signal of telecommunication, and determining that pinking occurs Pinking position, solve the problems, such as that prior art cannot judge the orientation that pinking in cylinder occurs.
Brief description
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, will make to required in embodiment description below Accompanying drawing be briefly described it should be apparent that, drawings in the following description are only some embodiments of the present invention, for For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings Accompanying drawing.
Fig. 1 is the structural representation of pinking position detecting system in the engine cylinder that the embodiment of the present invention one provides;
Fig. 2 is the structural representation of pinking position detecting system in the engine cylinder that the embodiment of the present invention two provides;
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 flow chart of pinking method for detecting position in the engine cylinder that the embodiment of the present invention three provides;
Fig. 7 is the flow chart of pinking method for detecting position in the engine cylinder that the embodiment of the present invention four provides.
Specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention Formula is described in further detail.
Embodiment one
Embodiments provide pinking position detecting system in a kind of engine cylinder, referring to Fig. 1, this system includes:
It is arranged on engine cylinder and be integrated with the spark plug assembly (not shown) of spark plug, be evenly distributed on spark plug four Multiple optical fiber observing windows 101 in week, optical fibre communication line 102, fiber amplifier unit 103, optical-electrical converter 104 and computer list Unit 105, in engine cylinder, each optical fiber observing window 101 is separately positioned on optical fibre communication line to optical fiber observing window 101 On 102 one end of an optical-fibre channel, the other end of optical-fibre channel connects a passage of fiber amplifier unit 103;
Optical fibre communication line 102, the multipath light signal for collecting multiple optical fiber observing windows 101 transmits to be put to optical fiber Big unit 103, wherein, optical signal is that optical fiber observing window 101 collects in cylinder;
Fiber amplifier unit 103, the multipath light signal for transmitting to optical fibre communication line 102 is amplified;
Optical-electrical converter 104, is converted to the signal of telecommunication for the multipath light signal after amplifying fiber amplifier unit 103;
Computer unit 105, for the multi-channel electric signal being exported according to optical-electrical converter 104, judge in engine cylinder be No generation pinking, and pinking position when determining that pinking occurs.
The embodiment of the present invention gathers in-engine optical signal by optical fiber observing window, then passes through fiber amplifier unit Convert optical signals to the signal of telecommunication with optical-electrical converter, then judge whether pinking occurs in electromotor according to the signal of telecommunication, and really Determine pinking position when pinking occurs, solve the problems, such as that prior art cannot judge the orientation that in cylinder, pinking occurs.
Embodiment two
Embodiments provide pinking position detecting system in a kind of engine cylinder, referring to Fig. 2 and Fig. 3, this system Including:
It is arranged on engine cylinder 2 and is integrated with the spark plug assembly 200 of spark plug 20, be evenly distributed on spark plug 20 4 Multiple optical fiber observing windows 201 in week, optical fibre communication line 202, fiber amplifier unit 203, optical-electrical converter 204 and computer list 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, and optical fiber leads to The other end in road connects a passage of fiber amplifier unit 203;
Optical fibre communication line 202, the multipath light signal for collecting multiple optical fiber observing windows 201 transmits to be put to optical fiber Big unit 203, wherein, optical signal is that optical fiber observing window 201 collects in cylinder;
Fiber amplifier unit 203, the multipath light signal for transmitting to optical fibre communication line 202 is amplified;
Optical-electrical converter 204, is converted to the signal of telecommunication for the multipath light signal after amplifying fiber amplifier unit 203;
Computer unit 205, for the multi-channel electric signal being exported according to optical-electrical converter 204, judge in engine cylinder be No generation pinking, and pinking position when determining that pinking occurs.
As shown in Figures 3 and 4, spark plug assembly 200 also includes sleeve 200a, spark plug 20, optical fibre communication line 202 and optical fiber Observation window 201 is all in sleeve 200a.Wherein, spark plug 20 includes central electrode 20a and other electrode 20b.Multiple optical fiber Observation window 201 is uniformly distributed in around central electrode 20a.
Further, sleeve 200a is provided with mark line 200b, 20b pair, other electrode in mark line 200b and spark plug 20 Together.During spark plug 20 installation process it is ensured that mark line 200b and other electrode 20b in the same plane, spark plug 20 is arranged on to be sent out On the engine cylinder 2 it may be determined that position of other electrode 20b, thus judge each position corresponding to optical fiber observing window 201.
Further, the observed direction of optical fiber observing window 201 and the length direction of spark plug 20 press from both sides an acute angle, observation side To the straight line place direction for the center perpendicular to optical fiber observing window 201, the observed direction of multiple optical fiber observing windows 201 is in It is radially distributed in around spark plug 20.This acute angle can be 60 degree, can preferably gather spy in engine operation process Survey the optical signal of each position around casing wall in engine cylinder 2.Wherein, the optical-fibre channel of optical fibre communication line 202 is total by spark plug 200 are become to extend to engine cylinder 2 bottom.Specifically, after engine ignition work, the flame of normal combustion starts to propagate, if During flame propagation, in engine cylinder 2, temperature pressure rise is too fast, and after having reached certain condition, it is existing that spontaneous combustion in detonation point As there is pinking.Now, the multiple optical fiber observing windows 201 being centrally located around electrode 20a collect different directions Optical signal, the optical signal collecting is transferred to fiber amplifier unit 203 by optical fibre communication line 202, through fiber amplifier unit 203 and after optical-electrical converter 204 processes, input computer unit 205, computer unit 205 judges according to the signal that receives Whether there is pinking and pinking position 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, should System can include 8 optical fiber observing windows 201.
Further, because conventional fiber amplifier is 4 passages, therefore fiber amplifier unit 203 can include 2 optical fiber Amplifier 203a, each fiber amplifier 203a includes 4 passages.Certainly, for the fiber amplifier of other port numbers, then should Fiber amplifier quantity in fiber amplifier unit 203 can determine according to practical situation.
Further, computer unit 205, for determining the maximum voltage value in multi-channel electric signal, compare maximum voltage , there is pinking if determining when maximum voltage value is more than or equal to pre-set threshold value in engine cylinder in value and pre-set threshold value size;If Then determine in engine cylinder when big magnitude of voltage is less than pre-set threshold value and pinking does not occur;Determine maximum voltage value pair when there is pinking The numbering of the optical fiber observing window corresponding to the optical signal answered;Numbering according to optical fiber observing window set in advance and position Corresponding relation, determines that the position of the optical fiber observing window collecting the corresponding optical signal of maximum voltage value is pinking position.
Wherein, pre-set threshold value can draw in advance according to test of many times.
Go out to cause the concrete reason of pinking according to pinking position analyses, such as design of Cooling System defect, air-flow operation problem, The influence factors such as combustor hot issue, are designed improving according to pinking reason, such that it is able to improve ignition phase, improve and send out The output performance of motivation, reduces oil consumption.
Specifically, computer unit 205 can be desktop computer, notebook computer or other types computer.
The embodiment of the present invention gathers in-engine optical signal by optical fiber observing window, then passes through fiber amplifier unit Convert optical signals to the signal of telecommunication with optical-electrical converter, then judge whether pinking occurs in electromotor according to the signal of telecommunication, and really Determine pinking position when pinking occurs, solve the problems, such as that prior art cannot judge the orientation that in cylinder, pinking occurs.
Embodiment three
Embodiments provide pinking method for detecting position in a kind of engine cylinder, the method adopt embodiment one or System in two is realized, and referring to Fig. 6, the method includes:
Step 301:The multipath light signal that multiple optical fiber observing windows are collected transmits to fiber amplifier unit.
Step 302:The multipath light signal of optical fibre communication line transmission is amplified.
Step 303:Multipath light signal after fiber amplifier unit is amplified is converted to the signal of telecommunication.
Step 304:According to the multi-channel electric signal of optical-electrical converter output, judge whether pinking occurs in engine cylinder, and Pinking position when determining that pinking occurs.
The embodiment of the present invention gathers in-engine optical signal by optical fiber observing window, then passes through fiber amplifier unit Convert optical signals to the signal of telecommunication with optical-electrical converter, then judge whether pinking occurs in electromotor according to the signal of telecommunication, and really Determine pinking position when pinking occurs, solve the problems, such as that prior art cannot judge the orientation that in cylinder, pinking occurs.
Example IV
Embodiments provide pinking method for detecting position in a kind of engine cylinder, the method adopt embodiment one or System in two is realized, and referring to Fig. 7, the method includes:
Step 401:The multipath light signal that multiple optical fiber observing windows are collected transmits to fiber amplifier unit.
Step 402:The multipath light signal of optical fibre communication line transmission is amplified.
Step 403:Multipath light signal after fiber amplifier unit is amplified is converted to the signal of telecommunication.
Step 404:Determine the maximum voltage value in multi-channel electric signal, compare maximum voltage value and pre-set threshold value size, if Maximum voltage value is more than or equal to pre-set threshold value it is determined that there is pinking in engine cylinder, and execution step 405 and 406;If Big magnitude of voltage is less than pre-set threshold value it is determined that there is not pinking in engine cylinder.
Wherein, pre-set threshold value can draw in advance according to test of many times.
Step 405:Determine optical fiber observing window corresponding to the corresponding optical signal of maximum voltage value when there is pinking Numbering.
Step 406:Numbering according to optical fiber observing window set in advance and the corresponding relation of position, determine and collect The position of the optical fiber observing window of the big corresponding optical signal of magnitude of voltage is pinking position.
Go out to cause the concrete reason of pinking according to pinking position analyses, such as design of Cooling System defect, air-flow operation problem, The influence factors such as combustor hot issue, are designed improving according to pinking reason, such that it is able to improve ignition phase, improve and send out The output performance of motivation, reduces oil consumption.
The embodiment of the present invention gathers in-engine optical signal by optical fiber observing window, then passes through fiber amplifier unit Convert optical signals to the signal of telecommunication with optical-electrical converter, then judge whether pinking occurs in electromotor according to the signal of telecommunication, and really Determine pinking position when pinking occurs, solve the problems, such as that prior art cannot judge the orientation that in cylinder, pinking occurs.
It should be noted that:In the engine cylinder that above-described embodiment provides, pinking position detecting system is in detection engine cylinder During interior pinking, only it is illustrated with the division of above-mentioned each functional module, in practical application, can as desired will be above-mentioned Function distribution is completed by different functional modules, the internal structure of equipment will be divided into different functional modules, with complete with The all or part of function of upper description.In addition, above-described embodiment provide engine cylinder in pinking position detecting system with send out In engine cylinder, pinking method for detecting position embodiment belongs to same design, and it implements process and refers to embodiment of the method, here Repeat no more.
The embodiments of the present invention are for illustration only, do 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 pass through hardware To complete it is also possible to the hardware being instructed correlation by program is completed, described program can be stored in a kind of computer-readable In storage medium, storage medium mentioned above can be read only memory, disk or CD etc..
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and Within principle, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.

Claims (10)

1. in a kind of engine cylinder pinking position detecting system it is characterised in that described system includes:
It is arranged on engine cylinder and be integrated with the spark plug assembly of spark plug, be evenly distributed on the multiple of described spark plug surrounding Optical fiber observing window, optical fibre communication line, fiber amplifier unit, optical-electrical converter and computer unit, described optical fiber observing window In described engine cylinder, one end of each optical-fibre channel of described optical fibre communication line is respectively provided with a described optical fiber and sees Survey window, the other end of described optical-fibre channel connects a passage of described fiber amplifier unit;
Described optical fibre communication line, the multipath light signal for collecting the plurality of optical fiber observing window transmits to described optical fiber Amplifying unit;
Described fiber amplifier unit, the multipath light signal for transmitting to described optical fibre communication line is amplified;
Described optical-electrical converter, is converted to the signal of telecommunication for the multipath light signal after amplifying described fiber amplifier unit;
Whether described computer unit, for the multi-channel electric signal being exported according to described optical-electrical converter, judge in engine cylinder There is pinking, and pinking position when determining that pinking occurs.
2. system according to claim 1 is it is characterised in that described spark plug assembly also includes sleeve, described spark plug, Described optical fibre communication line and described optical fiber observing window are all in described sleeve.
3. system according to claim 2 is it is characterised in that described sleeve is provided with mark line, described mark line and institute State the other electrode alignment in spark plug.
4. system according to claim 2 is it is characterised in that the observed direction of described optical fiber observing window and described spark The length direction of plug is in an acute angle, and described observed direction is the straight line place direction perpendicular to described optical fiber observing window, multiple The observed direction of described optical fiber observing window radially distributes around described spark plug.
5. system according to claim 4 is it is characterised in that described optical fiber observing window is quartz glass optical fiber observation window Mouthful.
6. system according to claim 1 is it is characterised in that described system includes 8 described optical fiber observing windows.
7. system according to claim 1 is it is characterised in that described fiber amplifier unit includes 2 fiber amplifiers, often Individual described fiber amplifier includes 4 passages.
8. pinking method for detecting position in the engine cylinder that the system any one of a kind of employing claim 1-7 is realized, It is characterized in that, methods described includes:
The multipath light signal that the plurality of optical fiber observing window is collected transmits to described fiber amplifier unit;
The multipath light signal of described optical fibre communication line transmission is amplified;
Multipath light signal after described fiber amplifier unit is amplified is converted to the signal of telecommunication;
According to the multi-channel electric signal of described optical-electrical converter output, judge whether pinking occurs in engine cylinder, and determine pinking Pinking position during generation.
9. method according to claim 8 it is characterised in that described according to described optical-electrical converter output multiple telecommunication Number, judge whether pinking occurs in engine cylinder, including:
Determine the maximum voltage value in multiple described signals of telecommunication;
Relatively 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 and pinking occurs in described engine cylinder.
10. method according to claim 9 it is characterised in that described determination pinking occur when pinking position, including:
Determine the numbering of the optical fiber observing window corresponding to the corresponding optical signal of described maximum voltage value;
Numbering according to optical fiber observing window set in advance and the corresponding relation of position, determine and collect described maximum voltage value The position of the optical fiber observing window of corresponding optical signal is described pinking position.
CN201510021512.0A 2015-01-15 2015-01-15 Detection system and method for knock position in engine cylinder Active CN104655361B (en)

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Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
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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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

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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
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