CN103625394B - A kind of clutch state recognition methods - Google Patents
A kind of clutch state recognition methods Download PDFInfo
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- CN103625394B CN103625394B CN201310539886.2A CN201310539886A CN103625394B CN 103625394 B CN103625394 B CN 103625394B CN 201310539886 A CN201310539886 A CN 201310539886A CN 103625394 B CN103625394 B CN 103625394B
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Abstract
The present invention proposes a kind of clutch state recognition methods, to improve accuracy and the reliability of clutch state identification.The present invention is as follows: control unit of engine judges clutch state according to accelerator pedal signal, vehicle speed signal, engine rotational speed signal, engine torque demand signal, idling torque control signal and gearbox-gear signal, automobile be in idling at shelves coasting mode and be not in descending state time, if engine torque demand reduces and idling moment of torsion reduces, then control unit of engine judges to be in when front clutch the state of stepping on, otherwise judges that power-transfer clutch is not in the state of stepping on; After automobile accelerator pedal unclamps, if engine speed bust, and speed of a motor vehicle changing value is less than predetermined value, then control unit of engine judges to be in when front clutch the state of stepping on, otherwise judges that power-transfer clutch is not in the state of stepping on.The present invention is simple and easy to realize, and can improve accuracy and the reliability of clutch state identification, increases the safety of wagon control.
Description
Technical field
The invention belongs to field of automobile electronic control, be related specifically to a kind of clutch state recognition methods.
Background technology
Clutch state has important effect in automobile EMS control system, is the important input that engine torque controls.Current automobile is all on pedal of clutch, clutch switch is installed, gather clutch switch signal by ECU and identify clutch state, because clutch switch itself easily damages, and the circuit diagnostics of on-off signal is difficult to realize, and causes certain hidden danger to traffic safety.
Summary of the invention
The object of the invention is to propose a kind of clutch state recognition methods, to improve accuracy and the reliability of clutch state identification.
Clutch state recognition methods of the present invention is as follows: control unit of engine gathers accelerator pedal signal, vehicle speed signal, engine rotational speed signal, engine torque demand signal, idling torque control signal and gearbox-gear signal, and judge clutch state according to accelerator pedal signal, vehicle speed signal, engine rotational speed signal, engine torque demand signal, idling torque control signal and gearbox-gear signal, specifically comprise the steps:
A: the clutch state determination methods of idling under shelves coasting mode: automobile be in idling at shelves coasting mode and be not in descending state time, if engine torque demand reduces and idling moment of torsion reduces, then control unit of engine judges to be in when front clutch the state of stepping on, otherwise judges that power-transfer clutch is not in the state of stepping on;
B: the clutch state determination methods after losing throttle under non-idling coasting mode: after automobile accelerator pedal unclamps, if engine speed bust, and speed of a motor vehicle changing value is less than predetermined value, then control unit of engine judges to be in when front clutch the state of stepping on, otherwise judges that power-transfer clutch is not in the state of stepping on.
The theoretical foundation of above-mentioned conjunction device state identification method is as follows: after idling steps on power-transfer clutch under shelves coasting mode, the prominent feature that engine control occurs is: 1, owing to stepping on power-transfer clutch, driving engine and change speed gear box are thrown off, and transmission resistance reduces instantaneously, and external engine demand torque reduces rapidly; 2, after stepping on power-transfer clutch, resistive torque reduces, and certainly will cause engine speed upper drift instantaneously, idle-speed control is consistent to make actual engine speed and target idling speed, needs to reduce idle-speed control P and I part torque adjustment; 3, because idling is when shelves coast, even without stepping on power-transfer clutch, also there will be the situation that the reduction of external demand moment of torsion, idling P and I part torque conditions reduce.In order to avoid the erroneous judgement of clutch state, need to identify that vehicle is in idling in shelves coast operating mode, because this operating mode and flat road idling have one significantly to distinguish at shelves coasting mode be exactly: descending there will be the speed of a motor vehicle to be increased, and the flat road speed of a motor vehicle keeps stable.The prominent feature stepping on power-transfer clutch rear engine control appearance after losing throttle under non-idling coasting mode is: 1, owing to stepping on power-transfer clutch, engine speed can drop sharply to idling speed; 2, the speed of a motor vehicle there will be slow decline, and to touch on the brake be quick decline.
Specifically, in described step A, when Das Gaspedal is in the state do not stepped on, and engine torque be idling moment of torsion state of a control, change speed gear box is not when being in neutral position state, control unit of engine judges that the current idling that is in of automobile is at shelves coasting mode.
In described step A, in idling under shelves coasting mode, when the speed of a motor vehicle is acceleration mode within several time periods continuous, control unit of engine judges that automobile is current and is in descending state.
In described step B, after the schedule time after automobile accelerator pedal unclamps, control unit of engine judges engine speed and the speed of a motor vehicle again.This is in order to for being avoided losing throttle moment, degree of cyclic irregularity on the impact calculated, Cai therefore after one is lost throttle delay time the speed of a motor vehicle and engine speed sudden change conditions are judged, the accuracy of judgement can be improved.
In described step B, if the rotating speed of engine speed within adjacent two time periods decreases beyond predetermined value, then show engine speed bust.
In described step B, if the decreasing value of the speed of a motor vehicle within described adjacent two time periods lowers be less than predetermined value, then show that speed of a motor vehicle changing value is less than predetermined value.
Clutch state recognition methods of the present invention is simple and easy to realize, when not increasing cost, can judge by assisted clutch Switch Controller clutch state, or clutch switch is diagnosed, improve accuracy and the reliability of clutch state identification, increase the safety of wagon control.
Accompanying drawing explanation
Fig. 1 is the diagram of circuit of clutch state recognition methods of the present invention.
Detailed description of the invention
Contrast accompanying drawing below, by the description to embodiment, the effect and principle of work etc. of the specific embodiment of the present invention as the mutual alignment between the shape of involved each component, structure, each several part and annexation, each several part are described in further detail.
Embodiment 1:
As shown in Figure 1, the clutch state recognition methods of the present embodiment is as follows: control unit of engine gathers accelerator pedal signal, vehicle speed signal, engine rotational speed signal, engine torque demand signal, idling torque control signal and gearbox-gear signal, and judge clutch state according to accelerator pedal signal, vehicle speed signal, engine rotational speed signal, engine torque demand signal, idling torque control signal and gearbox-gear signal, specifically comprise the steps:
A: the clutch state determination methods of idling under shelves coasting mode:
A1: judge whether automobile is in idling at shelves coasting mode: when Das Gaspedal is in the state do not stepped on, and engine torque be idling moment of torsion state of a control, change speed gear box is not when being in neutral position state, control unit of engine judges that the current idling that is in of automobile is at shelves coasting mode;
A2: judge whether automobile is in descending state: in idling under shelves coasting mode, when the speed of a motor vehicle is acceleration mode within continuous three time periods, control unit of engine judges that automobile is current and is in descending state;
A3: automobile be in idling at shelves coasting mode and be not in descending state time, if engine torque demand reduces and idling moment of torsion reduces, then control unit of engine judges to be in the state of stepping on when front clutch, otherwise judges that power-transfer clutch is not in the state of stepping on;
B: the clutch state determination methods after losing throttle under non-idling coasting mode: after the schedule time after automobile accelerator pedal unclamps, if the rotating speed of engine speed within adjacent two time periods decreases beyond predetermined value, and the decreasing value attenuating of the speed of a motor vehicle within described adjacent two time periods is less than predetermined value, then control unit of engine judges to be in when front clutch the state of stepping on, otherwise judges that power-transfer clutch is not in the state of stepping on.
Claims (6)
1. a clutch state recognition methods, it is characterized in that control unit of engine gathers accelerator pedal signal, vehicle speed signal, engine rotational speed signal, engine torque demand signal, idling torque control signal and gearbox-gear signal, and judge clutch state according to accelerator pedal signal, vehicle speed signal, engine rotational speed signal, engine torque demand signal, idling torque control signal and gearbox-gear signal, specifically comprise the steps:
A: the clutch state determination methods of idling under shelves coasting mode: automobile be in idling at shelves coasting mode and be not in descending state time, if engine torque demand reduces and idling moment of torsion reduces, then control unit of engine judges to be in when front clutch the state of stepping on, otherwise judges that power-transfer clutch is not in the state of stepping on;
B: the clutch state determination methods after losing throttle under non-idling coasting mode: after automobile accelerator pedal unclamps, if engine speed bust, and speed of a motor vehicle changing value is less than predetermined value, then control unit of engine judges to be in when front clutch the state of stepping on, otherwise judges that power-transfer clutch is not in the state of stepping on.
2. clutch state recognition methods according to claim 1, it is characterized in that in described step A, when Das Gaspedal is in the state do not stepped on, and engine torque be idling moment of torsion state of a control, change speed gear box is not when being in neutral position state, control unit of engine judges that the current idling that is in of automobile is at shelves coasting mode.
3. clutch state recognition methods according to claim 2, it is characterized in that in described step A, in idling under shelves coasting mode, when the speed of a motor vehicle is acceleration mode within several time periods continuous, control unit of engine judges that automobile is current and is in descending state.
4. the clutch state recognition methods according to claim 1 or 2 or 3, is characterized in that in described step B, and after the schedule time after automobile accelerator pedal unclamps, control unit of engine judges engine speed and the speed of a motor vehicle again.
5. clutch state recognition methods according to claim 4, is characterized in that in described step B, if the rotating speed of engine speed within adjacent two time periods decreases beyond predetermined value, then shows engine speed bust.
6. clutch state recognition methods according to claim 5, is characterized in that in described step B, if the decreasing value of the speed of a motor vehicle within described adjacent two time periods is less than predetermined value, then shows that speed of a motor vehicle changing value is less than predetermined value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310539886.2A CN103625394B (en) | 2013-11-05 | 2013-11-05 | A kind of clutch state recognition methods |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310539886.2A CN103625394B (en) | 2013-11-05 | 2013-11-05 | A kind of clutch state recognition methods |
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| CN103625394A CN103625394A (en) | 2014-03-12 |
| CN103625394B true CN103625394B (en) | 2016-01-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108583581A (en) * | 2018-06-01 | 2018-09-28 | 重庆众晓社新能源汽车有限公司 | A kind of new-energy automobile safety control system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106240497B (en) * | 2016-08-29 | 2019-01-22 | 广州汽车集团股份有限公司 | A kind of driving operating mode's switch method |
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|---|---|---|---|---|
| CN102009655A (en) * | 2010-11-19 | 2011-04-13 | 奇瑞汽车股份有限公司 | Method for diagnosing switching signal of clutch |
| CN102635692A (en) * | 2012-01-16 | 2012-08-15 | 浙江吉利汽车研究院有限公司 | Clutch neutral gear stopping device for automobile automatic transmission |
| CN102806874A (en) * | 2012-08-22 | 2012-12-05 | 上汽通用五菱汽车股份有限公司 | Clutch and brake mechanism and energy recovery system of pure electric vehicle |
| CN103029708A (en) * | 2013-01-07 | 2013-04-10 | 上海汽车变速器有限公司 | Control method based on engine starting and stopping and system thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090087199A (en) * | 2008-02-12 | 2009-08-17 | 한국오므론전장주식회사 | Electronic control system for vehicle and control method thereof |
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- 2013-11-05 CN CN201310539886.2A patent/CN103625394B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102009655A (en) * | 2010-11-19 | 2011-04-13 | 奇瑞汽车股份有限公司 | Method for diagnosing switching signal of clutch |
| CN102635692A (en) * | 2012-01-16 | 2012-08-15 | 浙江吉利汽车研究院有限公司 | Clutch neutral gear stopping device for automobile automatic transmission |
| CN102806874A (en) * | 2012-08-22 | 2012-12-05 | 上汽通用五菱汽车股份有限公司 | Clutch and brake mechanism and energy recovery system of pure electric vehicle |
| CN103029708A (en) * | 2013-01-07 | 2013-04-10 | 上海汽车变速器有限公司 | Control method based on engine starting and stopping and system thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108583581A (en) * | 2018-06-01 | 2018-09-28 | 重庆众晓社新能源汽车有限公司 | A kind of new-energy automobile safety control system |
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