CN104033223B - The measuring device of tail gas filter of I. C. engine regeneration point - Google Patents
The measuring device of tail gas filter of I. C. engine regeneration point Download PDFInfo
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- CN104033223B CN104033223B CN201410302442.1A CN201410302442A CN104033223B CN 104033223 B CN104033223 B CN 104033223B CN 201410302442 A CN201410302442 A CN 201410302442A CN 104033223 B CN104033223 B CN 104033223B
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- Prior art keywords
- regeneration point
- gas filter
- reference tube
- pressure
- exhaust gas
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- 230000008929 regeneration Effects 0.000 title claims abstract description 56
- 238000011069 regeneration method Methods 0.000 title claims abstract description 56
- 238000002485 combustion reaction Methods 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 9
- 206010034703 Perseveration Diseases 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 35
- 238000005259 measurement Methods 0.000 description 11
- 239000002245 particle Substances 0.000 description 7
- 238000009825 accumulation Methods 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 5
- 238000001914 filtration Methods 0.000 description 3
- 229910052573 porcelain Inorganic materials 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Processes For Solid Components From Exhaust (AREA)
Abstract
A kind of measuring device <b> of tail gas filter of I. C. engine regeneration point, </b> is used for combustion motor exhaust gas filter regeneration point and judges, its structure comprises: be connected to the exhaust gas filter (2) in suction tude (1), there is the pressure reference tube (4) of certain resistance coefficient, it is characterized in that, the outlet pipe (3) of exhaust gas filter is connected with mortor operated valve (5), exhaust pipe between outlet pipe and mortor operated valve is connected with described pressure reference tube, suction tude is equipped with the first pressure transducer (61), the entrance location of pressure reference tube is equipped with the second pressure transducer (62).Be characterized in: in regeneration point measuring phase, mortor operated valve is in closed condition, flowing in filter and pressure reference tube is the tail gas of internal-combustion engine under same operating, saves the step judging that whether operating mode is identical, makes the judgement of regeneration point timely; The phenomenon that simultaneously it also avoid mortor operated valve perseveration occurs, and the tail gas without filtered in regeneration point deterministic process enters air.
Description
Technical field
A kind of measuring device of tail gas filter of I. C. engine regeneration point
,judge for combustion motor exhaust gas filter regeneration point, to regenerate described filter in time.
Background technique
The particle of prior art combustion motor exhaust emissions generally adopts wall-flow ceramic filter to filter; when the particle accumulation in porcelain filter is to time a certain amount of; when namely arriving regeneration point, porcelain filter is regenerated, by heating, burn clearance of particles again to filter.Described regeneration point must have a suitable scope, and too low burning is insufficient, and ceramic for filtration can be made during too high burning to damage, and described regeneration point draws by test.Because the particle accumulation amount in ceramic for filtration can not directly be measured; so then prior art is generally calculated by the isoparametric measurement of pressure difference of combustion motor machine rotating speed, delivery temperature and porcelain filter the judgement of regeneration point; because the abrasion condition of the operating mode and internal-combustion engine self of internal-combustion engine is different; there is larger error to the particle accumulation amount that different internal-combustion engines calculates according to same formula with actual particle accumulation amount, accurately can not judge regeneration point.
For getting rid of the regeneration point error of calculations that the factors such as the operating mode of internal-combustion engine, wearing and tearing and internal-combustion engine individual difference are brought, whether particle accumulation amount in ceramic for filtration of accurately measuring reaches regeneration point; The patent No. be 2011101664792 patent of invention provide a kind of method of measurement of regeneration point of tail gas filter of diesel engine, the method is: the suction tude be connected with diesel engine is connected in parallel to exhaust gas filter and a pressure reference tube respectively, a mortor operated valve is provided with in the front end of exhaust gas filter, another mortor operated valve is provided with in the front end of pressure reference tube, suction tude is equipped with a pressure transducer, and described pressure reference tube has a fixing resistance coefficient; In diesel engine running, the resistance coefficient of exhaust gas filter can increase gradually, by controlling described mortor operated valve, tail gas is allowed to flow out from exhaust gas filter and pressure reference tube respectively, can measure the pressure in exhaust gas filter and pressure reference tube respectively with pressure transducer, the pressure comparing both can judge the regeneration point of exhaust gas filter.
The deficiency of this invention is: 1, first to judge diesel engine operating conditions whether stable (namely diesel engine speed have one stabilization time section), only just can judge regeneration point when diesel engine condition is stablized, make the judgement of regeneration point not in time; When diesel engine condition is unstable, judges that regeneration point needs repeatedly repeatedly to switch mortor operated valve, affect the working life of mortor operated valve; 2, when judging regeneration point, the tail gas having filtered enters air.
Summary of the invention
A kind of measuring device of tail gas filter of I. C. engine regeneration point is proposed for the present invention of prior art deficiency, the technical problem solved is on the basis of the regeneration point error of calculations brought in factors such as getting rid of the operating mode of internal-combustion engine, wearing and tearing and internal-combustion engine individual difference, make regeneration point judge in time, when judging regeneration point without unfiltered exhaust emissions simultaneously.
The structure of this measuring device comprises: be connected to the exhaust gas filter 2 in suction tude 1, it is characterized in that, the end of the outlet pipe 3 of exhaust gas filter is connected with mortor operated valve 5, the stage casing of outlet pipe is connected with the pressure reference tube 4 with certain resistance coefficient, suction tude is equipped with the first pressure transducer 61, the entrance location of pressure reference tube is equipped with the second pressure transducer 62.
The resistance coefficient of described pressure reference tube is 80% to 100% of the resistance coefficient of described exhaust gas filter when reaching regeneration point.
As a kind of improve near the first pressure transducer position pipeline on be also provided with the first temperature transducer 71, near the second pressure transducer position pipeline on be also provided with the second temperature transducer 72; The resistance coefficient of described pressure reference tube is 10% to 20% of the resistance coefficient of described exhaust gas filter when reaching regeneration point.
The present invention compared with prior art, its beneficial effect is: in regeneration point measuring phase, mortor operated valve is in closed condition, tail gas sequentially passes through from filter and pressure reference tube, the tail gas flowing through filter and pressure reference tube is the tail gas of internal-combustion engine under same operating, save the step judging that whether operating mode is identical, regeneration point can be judged in time; The phenomenon that simultaneously it also avoid mortor operated valve perseveration occurs, and extends the working life of mortor operated valve; Because pressure reference tube is arranged on the outlet pipe of exhaust gas filter, the tail gas without filtered in regeneration point deterministic process enters air.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the electrical principle skeleton diagram of pressure detecting instrument of the present invention.
Embodiment
Now contrast accompanying drawing and the specific embodiment of the present invention is described.
The structure of this measuring device first embodiment comprises: the suction tude 1 be connected with exhaust gases of internal combustion engines discharge tube, be connected to the exhaust gas filter 2 in suction tude 1, the filter core of described exhaust gas filter is wall-flow ceramic filter, it is characterized in that, the end of the outlet pipe 3 of exhaust gas filter is connected with mortor operated valve 5, the stage casing of outlet pipe is connected with the pressure reference tube 4 with certain resistance coefficient, suction tude is equipped with the first pressure transducer 61, the exhaust pipe of the entrance location near pressure reference tube is equipped with the second pressure transducer 62.
The resistance coefficient of described pressure reference tube is 80% to 100% of the resistance coefficient of described exhaust gas filter when reaching regeneration point.The resistance coefficient of described pressure reference tube adjusts acquisition by the diameter or length changing pressure reference tube.
The measurement procedure of this device is:
Force samples: namely close mortor operated valve, measures the pressure value P 0 in suction tude by the first pressure transducer; By the second pressure transducer measuring pressure reference tube upward pressure value P2;
Ratio calculation: namely calculate the pressure value P 1 of exhaust gas filter and the ratio K of the pressure value P 2 of pressure reference tube, the pressure value P 1 of exhaust gas filter is the pressure value P 0 of suction tude and the difference of the pressure value P 2 of pressure reference tube,
P1=P0－P2；
K=P1/P2；
Regeneration point judges: compare with a setting value K ' by ratio K, if K≤K ' shows that exhaust gas filter reaches regeneration point; If K ﹤ is K ', continue to repeat said method process from force samples step every one period of stand-by period.
After above-mentioned steps terminates, open mortor operated valve, tail gas flows out from mortor operated valve and pressure reference tube, to reduce the exhaust resistance of internal-combustion engine.
Test show when the resistance coefficient of described pressure reference tube be described exhaust gas filter reach regeneration point time resistance coefficient 80% to 100%, the measurement error of regeneration point can be less than 5%; When the resistance coefficient of described pressure reference tube be described exhaust gas filter reach regeneration point time resistance coefficient 10% to 20%, the measurement error of regeneration point can be less than 10%; The requirement of filter reliable regeneration can be met.
The difference of this measuring device second embodiment and the first embodiment is: near the first pressure transducer position pipeline on have additional the first temperature transducer 71, near the second pressure transducer position pipeline on have additional the second temperature transducer 72; Its measurement procedure also changes:
Change 1: in described force samples step, increases temperature sampling namely by the intake temperature T1 in the first temperature sensor measurement suction tude, by the inlet temperature T2 of the second temperature sensor measurement pressure reference tube;
Change 2: increase ratio temperature correction step between described ratio calculation step and regeneration point determining step, ratio temperature correction step is:
Calculate the difference △ T of intake temperature T1 and inlet temperature T2, △ T=T1-T2;
Ratio K is undertaken calculating temperature correction ratio K c by following formula,
Kc=K/(1+0.01△T)；
Change 3: replace ratio K with temperature correction ratio K c and compare with setting value K ' in described regeneration point determining step.
Adopt the pressure reference tube compared with slight drag coefficient, the exhaust back pressure of internal-combustion engine can be made when regeneration point is measured to reduce, thus additional oil consumption can be made to reduce; But the reduction of resistance coefficient can make temperature in outlet pipe be starkly lower than temperature in suction tude (temperature difference is maximum reaches 10 degree), makes regeneration point measurement error increase, therefore needs reduced value K to carry out temperature correction, to improve the measuring accuracy of regeneration point; The object of set temperature sensor is for temperature correction is used.Test when showing that pressure reference tube resistance coefficient is larger in outlet pipe in temperature and suction tude temperature less close to the temperature difference, the measurement error of regeneration point can be less than 5%; After the resistance coefficient of pressure reference tube reduces, the ratio temperature compensation described in increase also can make the measurement error of regeneration point be less than 5%.
Above-mentioned pressure measurement and the judgement of regeneration point are completed automatically by pressure detecting instrument 8.Fig. 2 is the block diagram of pressure detecting instrument 8, pressure detecting instrument 8 mainly comprises SCM system, drives the amplifirer of mortor operated valve, the input end that the output terminal of the first pressure transducer, the second pressure transducer, the first temperature transducer, the second temperature transducer is corresponding with SCM system is respectively connected, the output terminal of SCM system is connected with the input end of amplifirer, the output termination mortor operated valve of amplifirer; Program is provided with in SCM system, control the first pressure transducer, the second pressure transducer, the first temperature transducer, the second temperature transducer and mortor operated valve at set intervals and carry out pressure, temperature sampling, carry out ratio calculation, ratio temperature correction (when needing), regeneration point judgement to the pressure signal gathered, when exhaust gas filter reaches regeneration point, SCM system sends the signal that a prompting needs to regenerate exhaust gas filter; After regeneration point measuring phase terminates, control mortor operated valve and open.
Claims (4)
1. the measuring device of a tail gas filter of I. C. engine regeneration point, comprise: be connected to the exhaust gas filter (2) in suction tude (1), it is characterized in that, the end of the outlet pipe (3) of exhaust gas filter is connected with mortor operated valve (5), the pressure reference tube (4) with certain resistance coefficient is connected with in the stage casing of outlet pipe, suction tude is equipped with the first pressure transducer (61), the entrance location of pressure reference tube is equipped with the second pressure transducer (62).
2. the measuring device of tail gas filter of I. C. engine regeneration point according to claim 1, is characterized in that, the resistance coefficient of described pressure reference tube is 80% to 100% of the resistance coefficient of described exhaust gas filter when reaching regeneration point.
3. the measuring device of tail gas filter of I. C. engine regeneration point according to claim 1, is characterized in that, the resistance coefficient of described pressure reference tube is 10% to 20% of the resistance coefficient of described exhaust gas filter when reaching regeneration point.
4. the measuring device of tail gas filter of I. C. engine regeneration point according to claim 3, it is characterized in that, near the first pressure transducer position pipeline on be also provided with the first temperature transducer (71), near the second pressure transducer position pipeline on be also provided with the second temperature transducer (72).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410302442.1A CN104033223B (en) | 2014-06-30 | 2014-06-30 | The measuring device of tail gas filter of I. C. engine regeneration point |
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| CN201410302442.1A CN104033223B (en) | 2014-06-30 | 2014-06-30 | The measuring device of tail gas filter of I. C. engine regeneration point |
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| CN104033223A CN104033223A (en) | 2014-09-10 |
| CN104033223B true CN104033223B (en) | 2016-03-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3414434B1 (en) | 2016-02-10 | 2021-01-27 | Scania CV AB | Method and system for diagnosing exhaust sensors |
| CN113833555A (en) * | 2021-09-27 | 2021-12-24 | 无锡威孚力达催化净化器有限责任公司 | Method and device for determining carrier backpressure, terminal and readable storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2011149414A (en) * | 2009-09-15 | 2011-08-04 | Ibiden Co Ltd | Particulate sensor and exhaust emission control device |
| JP5716519B2 (en) * | 2011-04-27 | 2015-05-13 | トヨタ自動車株式会社 | Exhaust gas recirculation system for internal combustion engines |
| CN102537428A (en) * | 2011-06-21 | 2012-07-04 | 高玉琴 | Four-way valve |
| CN102840020B (en) * | 2011-06-21 | 2014-11-12 | 高玉琴 | Measuring device for regeneration point of diesel engine exhaust filter |
| JP2013231376A (en) * | 2012-04-27 | 2013-11-14 | Iseki & Co Ltd | Working vehicle |
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Effective date of registration: 20180323 Address after: 511492 East Ring Road No. 120, east ring street, Panyu District, Guangzhou, Guangdong (north side of workshop No. 5) Patentee after: Guangzhou Sheng Kang Power Equipment Co., Ltd. Address before: 225500 Jiangsu province Taizhou city Jiangyan District Jiangyan town Jindu International Garden Room C2-304 Patentee before: Gao Yuqin |
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