CN104929786A - Vehicle fuel cut control method and device - Google Patents
Vehicle fuel cut control method and device Download PDFInfo
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- CN104929786A CN104929786A CN201510240479.0A CN201510240479A CN104929786A CN 104929786 A CN104929786 A CN 104929786A CN 201510240479 A CN201510240479 A CN 201510240479A CN 104929786 A CN104929786 A CN 104929786A
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- vehicle
- rotating speed
- oil
- engine
- mass flywheel
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Abstract
The invention discloses a vehicle fuel cut control method and a device. The time of stopping supplying fuel to an engine is determined through comparing the rotating speed of the vehicle engine with the fuel cut rotating speed and comparing the engine rotating speed fluctuation rate with the preset rotating speed fluctuation rate; and if the rotating speed of the engine is lower than or equal to the fuel cut rotating speed at a present gear, the engine rotating speed fluctuation rate is greater than or equal to the preset rotating speed fluctuation rate, and a vehicle clutch is located in a joint state, the fuel supply to the engine is cut off, so that a dual mass flywheel can be prevented from operating in a resonance area, and the dual mass flywheel and a crankshaft are protected.
Description
Technical field
The invention belongs to field of vehicle control, particularly a kind of vehicle fuel cut-off control method and device.
Background technique
In order to improve driving comfortability and the smoothness of manual gear vehicle, a large amount of car enterprise have employed double mass flywheel on the engine, and its reason is that double mass flywheel has the function such as damping, noise reduction.But, be configured with manually keeping off a car of double mass flywheel, when vehicle there is off-gear, suppress the situations such as car time, easily cause engine speed to reduce, when engine speed is lower than 700rpm, double mass flywheel easily and bent axle produce and resonate, cause the damage of the two.
Summary of the invention
Technical problem to be solved by this invention is to provide one can make double mass flywheel avoid running at resonance zone, the vehicle fuel cut-off control method shield to double mass flywheel and bent axle and device.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
A kind of vehicle fuel cut-off control method, comprises the steps:
Determine that the working time of motor is greater than Preset Time;
Determine the current residing gear of vehicle;
Now, if the rotating speed of motor is less than or equal to the oil-break rotating speed under current shift, and engine speed fluctuations rate is more than or equal to preset rotation speed fluctuation ratio, and the clutch of vehicle is in jointing state, then cut off to engine oil.
Preferably, described Preset Time is 3 seconds.
Preferably, the current residing gear of described vehicle is obtained by shift sensor.
Preferably, described oil-break rotating speed is by obtaining the Experimental Calibration of double mass flywheel.
Preferably, described preset rotation speed fluctuation ratio is by obtaining the Experimental Calibration of double mass flywheel.
A kind of vehicle device for controlling fuel injection comprises the first information acquisition module, the second data obtaining module and the Executive Module that connect successively;
Described first information acquisition module, it is for determining that the working time of motor is greater than Preset Time;
Described second data obtaining module, it is for determining the current residing gear of vehicle;
Described Executive Module, it is for being less than or equal to the oil-break rotating speed under current shift when the rotating speed of motor, and engine speed fluctuations rate is more than or equal to preset rotation speed fluctuation ratio, and when the clutch of vehicle is in jointing state, cuts off to engine oil.
Preferably, in described first information acquisition module, Preset Time is 3 seconds.
Preferably, in described second data obtaining module, the current residing gear of vehicle is obtained by shift sensor.
Preferably, in described Executive Module, oil-break rotating speed passes through to obtain the Experimental Calibration of double mass flywheel.
Preferably, in described Executive Module, preset rotation speed fluctuation ratio passes through to obtain the Experimental Calibration of double mass flywheel.
A kind of vehicle fuel cut-off control method provided by the present invention and device, it passes through the rotating speed of vehicle motor and comparing of oil-break rotating speed, and engine speed fluctuations rate was determined to stop the opportunity to engine oil with comparing of preset rotation speed fluctuation ratio, if the rotating speed of motor is less than or equal to the oil-break rotating speed under current shift, and engine speed fluctuations rate is more than or equal to preset rotation speed fluctuation ratio, and the clutch of vehicle is in jointing state, then cut off to engine oil, thus double mass flywheel can be made to avoid running at resonance zone, double mass flywheel and bent axle are played a protective role.
Accompanying drawing explanation
The flow chart of the vehicle fuel cut-off control method that Fig. 1 provides for the embodiment of the present invention;
The skeleton diagram of the vehicle fuel cut-off control that Fig. 2 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
As shown in Figure 1, a kind of vehicle fuel cut-off control method comprises the steps:
Step 1:ECU (Electronic Control Unit, electronic control unit, also known as " car running computer ", " vehicle-mounted computer ") running state of present engine is obtained by the running state flag bit of motor, and determine that the working time of motor is greater than Preset Time, this Preset Time is preferably 3 seconds.Be greater than 3 seconds between only having when the engine is running, guarantee motor runs well, and Starter is thrown off with flywheel.
Step 2: obtain the current residing gear of vehicle by shift sensor, because under different gear, the resonance speed of double mass flywheel and bent axle is different, so need to judge the current residing gear of vehicle, and then could determine the oil-break rotating speed under current shift.Oil-break rotating speed under current shift obtains according to Experimental Calibration, and same double mass flywheel oil-break rotating speed under different gear is different; Different double mass flywheel coupling is with on a car, and the resonance speed under identical gear is not identical yet, so need be obtained the oil-break rotating speed under different gear by test.
Step 3: now, if the rotating speed of motor is less than or equal to the oil-break rotating speed under current shift, and engine speed fluctuations rate is more than or equal to preset rotation speed fluctuation ratio, and the clutch of vehicle is in jointing state, then cut off to engine oil.Preset rotation speed fluctuation ratio is by obtaining the Experimental Calibration of double mass flywheel, and this preset rotation speed fluctuation ratio is arranged within double mass flywheel can not produce the maximum fluctuation rate scope of resonance.The clutch of vehicle is in jointing state and ensure that vehicle is in gear running state, and when stopping is after engine oil, the speed of a motor vehicle could slowly reduce.
This vehicle fuel cut-off control method is passed through the rotating speed of vehicle motor and comparing of oil-break rotating speed; and engine speed fluctuations rate was determined to stop the opportunity to engine oil with comparing of preset rotation speed fluctuation ratio; if the rotating speed of motor is less than or equal to the oil-break rotating speed under current shift; and engine speed fluctuations rate is more than or equal to preset rotation speed fluctuation ratio; and the clutch of vehicle is in jointing state; then cut off to engine oil; thus double mass flywheel can be made to avoid running at resonance zone, double mass flywheel and bent axle are played a protective role.
Correspondingly, as shown in Figure 2, the embodiment of the present invention additionally provides a kind of vehicle device for controlling fuel injection, and it comprises first information acquisition module 100, second data obtaining module 200 and Executive Module 300 that connect successively;
First information acquisition module 100, it is for determining that the working time of motor is greater than Preset Time.This Preset Time is 3 seconds, is greater than 3 seconds between only having when the engine is running, ensure that motor runs well, and Starter is thrown off with flywheel.
Second data obtaining module 200, it obtains the current residing gear of vehicle by shift sensor, because under different gear, the resonance speed of double mass flywheel is different, so need to judge the current residing gear of vehicle, and then the oil-break rotating speed under current shift could be determined.Oil-break rotating speed under current shift obtains according to Experimental Calibration, and same double mass flywheel oil-break rotating speed under different gear is different; Different double mass flywheel coupling is with on a car, and the resonance speed under identical gear is not identical yet.So the oil-break rotating speed under different gear need be obtained by test.
Executive Module 300, it is for being less than or equal to the oil-break rotating speed under current shift when the rotating speed of motor, and engine speed fluctuations rate is more than or equal to preset rotation speed fluctuation ratio, and when the clutch of vehicle is in jointing state, cuts off to engine oil.Oil-break rotating speed under current shift obtains according to Experimental Calibration, and same double mass flywheel oil-break rotating speed under different gear is different; Different double mass flywheel coupling is with on a car, and the resonance speed under identical gear is not identical yet, so need be obtained the oil-break rotating speed under different gear by test.Preset rotation speed fluctuation ratio is by obtaining the Experimental Calibration of double mass flywheel, and this preset rotation speed fluctuation ratio is arranged within double mass flywheel can not produce the maximum fluctuation rate scope of resonance.The clutch of vehicle is in jointing state and ensure that vehicle is in gear running state, and when stopping is after engine oil, the speed of a motor vehicle could slowly reduce.
This vehicle device for controlling fuel injection passes through the rotating speed of vehicle motor and comparing of oil-break rotating speed; and engine speed fluctuations rate was determined to stop the opportunity to engine oil with comparing of preset rotation speed fluctuation ratio; if the rotating speed of motor is less than or equal to the oil-break rotating speed under current shift; and engine speed fluctuations rate is more than or equal to preset rotation speed fluctuation ratio; and the clutch of vehicle is in jointing state; then cut off to engine oil; thus double mass flywheel can be made to avoid running at resonance zone, double mass flywheel and bent axle are played a protective role.
In sum, content of the present invention is not limited in the above-described embodiments, and those skilled in the art can propose other mode of execution easily according to guiding theory of the present invention, and these mode of executions all comprise within the scope of the present invention.
Claims (10)
1. a vehicle fuel cut-off control method, is characterized in that, comprises the steps:
Determine that the working time of motor is greater than Preset Time;
Determine the current residing gear of vehicle;
Now, if the rotating speed of motor is less than or equal to the oil-break rotating speed under current shift, and engine speed fluctuations rate is more than or equal to preset rotation speed fluctuation ratio, and the clutch of vehicle is in jointing state, then cut off to engine oil.
2. vehicle fuel cut-off control method according to claim 1, is characterized in that: described Preset Time is 3 seconds.
3. vehicle fuel cut-off control method according to claim 1, is characterized in that: the current residing gear of described vehicle is obtained by shift sensor.
4. vehicle fuel cut-off control method according to claim 1, is characterized in that: described oil-break rotating speed is by obtaining the Experimental Calibration of double mass flywheel.
5. vehicle fuel cut-off control method according to claim 1, is characterized in that: described preset rotation speed fluctuation ratio is by obtaining the Experimental Calibration of double mass flywheel.
6. a vehicle device for controlling fuel injection, is characterized in that, comprising: the first information acquisition module connected successively, the second data obtaining module and Executive Module;
Described first information acquisition module, it is for determining that the working time of motor is greater than Preset Time;
Described second data obtaining module, it is for determining the current residing gear of vehicle;
Described Executive Module, it is for being less than or equal to the oil-break rotating speed under current shift when the rotating speed of motor, and engine speed fluctuations rate is more than or equal to preset rotation speed fluctuation ratio, and when the clutch of vehicle is in jointing state, cuts off to engine oil.
7. vehicle device for controlling fuel injection according to claim 6, is characterized in that: in described first information acquisition module, Preset Time is 3 seconds.
8. vehicle device for controlling fuel injection according to claim 6, is characterized in that: in described second data obtaining module, the current residing gear of vehicle is obtained by shift sensor.
9. vehicle device for controlling fuel injection according to claim 6, is characterized in that: in described Executive Module, oil-break rotating speed is by obtaining the Experimental Calibration of double mass flywheel.
10. vehicle device for controlling fuel injection according to claim 6, is characterized in that: in described Executive Module, preset rotation speed fluctuation ratio is by obtaining the Experimental Calibration of double mass flywheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510240479.0A CN104929786A (en) | 2015-05-12 | 2015-05-12 | Vehicle fuel cut control method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510240479.0A CN104929786A (en) | 2015-05-12 | 2015-05-12 | Vehicle fuel cut control method and device |
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| CN104929786A true CN104929786A (en) | 2015-09-23 |
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| CN201510240479.0A Pending CN104929786A (en) | 2015-05-12 | 2015-05-12 | Vehicle fuel cut control method and device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160097335A1 (en) * | 2009-04-20 | 2016-04-07 | Continental Automotive Gmbh | IMethod and Device for Operating an Internal Combustion Engine |
| CN107100745A (en) * | 2016-02-22 | 2017-08-29 | 上汽通用汽车有限公司 | The method of noise of automobile of the reduction with double mass flywheel during flame-out |
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| JP2010037988A (en) * | 2008-08-01 | 2010-02-18 | Toyota Motor Corp | Internal combustion engine control device |
| CN103016705A (en) * | 2011-09-23 | 2013-04-03 | 通用汽车环球科技运作有限责任公司 | System and method for controlling loads on a dual mass flywheel attached to an engine based on engine speed |
| CN104102793A (en) * | 2014-08-04 | 2014-10-15 | 安徽江淮汽车股份有限公司 | Analysis method for engine crankshaft system torsional vibration |
| CN104185583A (en) * | 2012-03-16 | 2014-12-03 | 日产自动车株式会社 | Drive control device and drive control method for hybrid drive electric automobile |
| CN104198181A (en) * | 2014-07-31 | 2014-12-10 | 长城汽车股份有限公司 | Method and system for resonance detection of dual mass flywheel |
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2015
- 2015-05-12 CN CN201510240479.0A patent/CN104929786A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010037988A (en) * | 2008-08-01 | 2010-02-18 | Toyota Motor Corp | Internal combustion engine control device |
| CN103016705A (en) * | 2011-09-23 | 2013-04-03 | 通用汽车环球科技运作有限责任公司 | System and method for controlling loads on a dual mass flywheel attached to an engine based on engine speed |
| CN104185583A (en) * | 2012-03-16 | 2014-12-03 | 日产自动车株式会社 | Drive control device and drive control method for hybrid drive electric automobile |
| CN104198181A (en) * | 2014-07-31 | 2014-12-10 | 长城汽车股份有限公司 | Method and system for resonance detection of dual mass flywheel |
| CN104102793A (en) * | 2014-08-04 | 2014-10-15 | 安徽江淮汽车股份有限公司 | Analysis method for engine crankshaft system torsional vibration |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160097335A1 (en) * | 2009-04-20 | 2016-04-07 | Continental Automotive Gmbh | IMethod and Device for Operating an Internal Combustion Engine |
| US9797324B2 (en) * | 2009-04-20 | 2017-10-24 | Continental Automotive Gmbh | Method and device for operating an internal combustion engine |
| CN107100745A (en) * | 2016-02-22 | 2017-08-29 | 上汽通用汽车有限公司 | The method of noise of automobile of the reduction with double mass flywheel during flame-out |
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Address after: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Applicant after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Applicant before: Anhui Jianghuai Automotive Co., Ltd. |
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Application publication date: 20150923 |