CN114439938A - Engine control method and device in starting process of manual-gear vehicle and vehicle - Google Patents
Engine control method and device in starting process of manual-gear vehicle and vehicle Download PDFInfo
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- CN114439938A CN114439938A CN202210093564.9A CN202210093564A CN114439938A CN 114439938 A CN114439938 A CN 114439938A CN 202210093564 A CN202210093564 A CN 202210093564A CN 114439938 A CN114439938 A CN 114439938A
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- vehicle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
- F16H63/50—Signals to an engine or motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
Abstract
The invention provides an engine control method in the starting process of a manual transmission vehicle, which comprises the following steps: when the vehicle is judged to be in a starting and semi-clutch state, controlling the torque of the engine to be output according to a first preset torque curve; when the vehicle is judged to be in other starting states except the starting semi-clutch state, controlling the torque of the engine to be output according to a second preset torque curve; in the first preset torque curve, when the opening degree of an accelerator pedal is not changed, the torque of the engine is increased and then reduced along with the increase of the rotating speed of the engine.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to an engine control method and device in the starting process of a manual-gear vehicle and an automobile.
Background
With the development of economy and the continuous progress of science and technology, the income and the living standard of people are continuously improved, and regardless of work or life, the automobile is an important vehicle indispensable to the life of modern people.
With the development of automobiles, automatic transmission automobiles have become more and more large, but still a large part of people purchase manual transmission vehicles due to their cost advantages. And many novice drivers are not proficient enough to drive the vehicle, and the accelerator pedal and the clutch pedal are not well controlled to easily pull the rotating speed of the engine to be very high when the manual vehicle type is used for stepping on the accelerator for starting, so that the rotating speed difference between the main friction plate and the auxiliary friction plate of the clutch is large, the temperature of the clutch plate is too high, the clutch plate is ablated, the service life of the clutch is greatly shortened, and the cost of the vehicle is increased.
Disclosure of Invention
The invention aims to provide an engine control method and device for a manual-gear vehicle starting process and an automobile.
The technical scheme of the invention is as follows:
the invention provides an engine control method in the starting process of a manual transmission vehicle, which comprises the following steps:
when the vehicle is judged to be in a starting and semi-clutch state, controlling the torque of the engine to be output according to a first preset torque curve;
when the vehicle is judged to be in other starting states except the starting semi-clutch state, controlling the torque of the engine to be output according to a second preset torque curve;
in the first preset torque curve, when the opening degree of an accelerator pedal is not changed, the torque of the engine is increased and then reduced along with the increase of the rotating speed of the engine.
Preferably, the specific conditions for determining that the vehicle is in the starting and partially-clutched state are as follows:
the first condition is as follows: the clutch pedal travel ClutchDistance of the vehicle indicates that the clutch is in a half-clutch state;
and a second condition: the brake pedal state of the vehicle is a brake-not-stepping state;
and (3) carrying out a third condition: the accelerator pedal opening AccPed of the vehicle is larger than a preset pedal opening value AccPedMin;
the vehicle speed is less than the preset vehicle speed VehSpeedMin; and
and a fifth condition: the shift handle of the vehicle is in a gear state.
Preferably, if the clutch pedal travel ClutchDistance of the vehicle is greater than the preset clutch minimum pedal travel ClutchDistance min and less than the preset clutch maximum pedal travel ClutchDistance max, it indicates that the clutch of the vehicle is in the half-clutch state.
Wherein ClutchDistanceMax represents a pedal stroke when the clutch is disengaged, ClutchDistanceMin represents a pedal stroke when the clutch is engaged, and the pedal stroke ClutchDistanceMax when the clutch is disengaged and the pedal stroke ClutchDistanceMin when the clutch is engaged are both nominal values.
Preferably, the second preset torque curve is an engine-out characteristic curve of the vehicle.
The invention also provides an engine control device in the starting process of the manual transmission vehicle, which comprises the following steps:
the first control module is used for controlling the torque of the engine to be output according to a first preset torque curve when the vehicle is judged to be in a starting and semi-clutch state;
the second control module is used for controlling the torque of the engine to be output according to a second preset torque curve when the vehicle is judged to be in other starting states except the starting half-clutch state;
in the first preset torque curve, when the opening degree of an accelerator pedal is not changed, the torque of the engine is increased and then reduced along with the increase of the rotating speed of the engine.
The invention also provides an automobile which is characterized by comprising the engine control device in the starting process of the manual-gear vehicle.
The invention has the beneficial effects that:
when a driver drives a manual-gear vehicle to start by stepping on an accelerator, the engine is accurately controlled through the engine control unit assembly, so that the power output of vehicle starting is ensured, and the abrasion of a clutch caused by overhigh rotating speed of the engine is avoided.
Drawings
FIG. 1 is a schematic diagram of an engine control scheme under a manual transmission vehicle throttle-stepping starting condition according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of an engine control method under a manual transmission vehicle accelerator-stepping starting condition according to an embodiment of the invention.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiment of the present invention. The described embodiments are merely some embodiments, and not all embodiments, of the invention. All other examples, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The embodiment of the invention provides a scheme for controlling an engine under the starting working condition of stepping on an accelerator by a manual transmission vehicle.
In the scheme, as shown in fig. 1, an engine control unit assembly acquires relevant characteristic signals of an engine and a finished vehicle in real time. The characteristic signals include a clutch pedal travel ClutchDistance, a brake pedal state clearstatus, an accelerator pedal signal AccPed, a vehicle speed signal VehSpeed, and shift lever position information ShiftPosition.
And then the engine control unit assembly carries out comprehensive processing on the signals so as to carry out special control on the engine.
The processing flow of the method for processing the engine under the starting working condition of the manual transmission vehicle by the engine control unit assembly is shown in FIG. 2.
When the whole vehicle is started by stepping on the accelerator by a driver, the engine control unit performs comprehensive processing on the related signals to control the engine, and the specific processing flow is as follows:
step1, the engine control unit assembly acquires the clutch pedal stroke ClutchDistance, the brake pedal state BreakStatus, the accelerator pedal signal AccPed, the vehicle speed signal VehSpeed and the shift handle position information ShiftPosition in real time;
step2, the engine output torque EngTrq is equal to AccPedTqLimMax when the following conditions are all satisfied.
The engine torque EngTrq is firstly increased and then decreased along with the increase of the engine speed EngSpeed under the condition that the accelerator pedal signal AccPed is unchanged.
Wherein, the above conditions are specifically:
the first condition is as follows: the clutch pedal travel ClutchDistance is less than ClutchDistance max and greater than ClutchDistance min, indicating that the clutch is in a half-clutch state; wherein ClutchDistanceMax represents clutch disengagement and ClutchDistanceMin represents clutch engagement, both of which may be calibrated.
And a second condition: the brake pedal state break status =0, representing no brake application.
And (3) carrying out a third condition: the accelerator pedal signal AccPed is greater than a preset pedal opening value AccPedMin, wherein AccPedMin can be calibrated.
And the condition IV is that the vehicle speed signal VehSpeed is less than the preset vehicle speed VehSpeedMin, wherein the VehSpeedMin can be calibrated.
And a fifth condition: the shift lever position information ShiftPosition =1 represents that the transmission is in the gear state.
Step3, when one of the above five conditions is not satisfied, the engine torque EngTrq is equal to AccPedTrq (a second preset torque curve, specifically, an engine-external characteristic curve of the vehicle), where AccPedTrq is calibratable, and is Map for normal driving demand.
According to the method, when a driver drives a manual-gear vehicle to step on an accelerator for starting, the engine is accurately controlled through the engine control unit assembly, so that the power output of the vehicle for starting is ensured, and the abrasion of a clutch caused by overhigh rotating speed of the engine is avoided.
Claims (6)
1. An engine control method in a starting process of a manual-gear vehicle is characterized by comprising the following steps:
when the vehicle is judged to be in a starting and semi-clutch state, controlling the torque of the engine to be output according to a first preset torque curve;
when the vehicle is judged to be in other starting states except the starting semi-clutch state, controlling the torque of the engine to be output according to a second preset torque curve;
in the first preset torque curve, when the opening degree of an accelerator pedal is not changed, the torque of the engine is increased and then reduced along with the increase of the rotating speed of the engine.
2. The method according to claim 1, wherein the specific conditions for determining that the vehicle is in the launch semi-clutch state are:
the first condition is as follows: the clutch pedal travel ClutchDistance of the vehicle indicates that the clutch is in a half-clutch state;
and a second condition: the brake pedal state of the vehicle is a brake-not-stepping state;
and (3) carrying out a third condition: the accelerator pedal opening AccPed of the vehicle is larger than a preset pedal opening value AccPedMin;
the vehicle speed is less than the preset vehicle speed VehSpeedMin; and
and a fifth condition: the shift handle of the vehicle is in a gear state.
3. The method of claim 2, wherein if the clutch pedal travel ClutchDistance of the vehicle is greater than a preset clutch minimum pedal travel ClutchDistance min and less than a preset clutch maximum pedal travel ClutchDistance max, indicating that the clutch of the vehicle is in a semi-engaged state;
wherein ClutchDistanceMax represents a pedal stroke when the clutch is disengaged, ClutchDistanceMin represents a pedal stroke when the clutch is engaged, and the pedal stroke ClutchDistanceMax when the clutch is disengaged and the pedal stroke ClutchDistanceMin when the clutch is engaged are both nominal values.
4. The method of claim 1, wherein the second predetermined torque profile is an engine-out characteristic of the vehicle.
5. An engine control device during starting of a manual transmission vehicle, comprising:
the first control module is used for controlling the torque of the engine to be output according to a first preset torque curve when the vehicle is judged to be in a starting and semi-clutch state;
the second control module is used for controlling the torque of the engine to be output according to a second preset torque curve when the vehicle is judged to be in other starting states except the starting half-clutch state;
in the first preset torque curve, when the opening degree of an accelerator pedal is not changed, the torque of the engine is increased and then reduced along with the increase of the rotating speed of the engine.
6. An automobile comprising the engine control device during a start of a manual transmission vehicle according to claim 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210093564.9A CN114439938B (en) | 2022-01-26 | 2022-01-26 | Engine control method and device in starting process of manual-gear vehicle and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210093564.9A CN114439938B (en) | 2022-01-26 | 2022-01-26 | Engine control method and device in starting process of manual-gear vehicle and vehicle |
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| Publication Number | Publication Date |
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| CN114439938A true CN114439938A (en) | 2022-05-06 |
| CN114439938B CN114439938B (en) | 2023-04-07 |
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| CN202210093564.9A Active CN114439938B (en) | 2022-01-26 | 2022-01-26 | Engine control method and device in starting process of manual-gear vehicle and vehicle |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102910169A (en) * | 2012-07-21 | 2013-02-06 | 北京工业大学 | Vehicle starting-up control method capable of reducing oil consumption |
| CN103306834A (en) * | 2013-06-27 | 2013-09-18 | 长城汽车股份有限公司 | Engine torque control method capable of improving the start performance of whole vehicle |
| JP2014084813A (en) * | 2012-10-25 | 2014-05-12 | Aisin Seiki Co Ltd | Vehicle driving device |
| CN105644561A (en) * | 2015-12-25 | 2016-06-08 | 潍柴动力股份有限公司 | Method and system for controlling starting of AMT vehicle |
| DE102015119527A1 (en) * | 2015-06-26 | 2016-12-29 | Hyundai Motor Company | Apparatus and method for learning a clutch torque of a dual clutch transmission |
| CN108749810A (en) * | 2018-05-31 | 2018-11-06 | 重庆长安汽车股份有限公司 | A kind of torque control method of manual-gear vehicle starting |
-
2022
- 2022-01-26 CN CN202210093564.9A patent/CN114439938B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102910169A (en) * | 2012-07-21 | 2013-02-06 | 北京工业大学 | Vehicle starting-up control method capable of reducing oil consumption |
| JP2014084813A (en) * | 2012-10-25 | 2014-05-12 | Aisin Seiki Co Ltd | Vehicle driving device |
| CN103306834A (en) * | 2013-06-27 | 2013-09-18 | 长城汽车股份有限公司 | Engine torque control method capable of improving the start performance of whole vehicle |
| DE102015119527A1 (en) * | 2015-06-26 | 2016-12-29 | Hyundai Motor Company | Apparatus and method for learning a clutch torque of a dual clutch transmission |
| CN105644561A (en) * | 2015-12-25 | 2016-06-08 | 潍柴动力股份有限公司 | Method and system for controlling starting of AMT vehicle |
| CN108749810A (en) * | 2018-05-31 | 2018-11-06 | 重庆长安汽车股份有限公司 | A kind of torque control method of manual-gear vehicle starting |
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| CN114439938B (en) | 2023-04-07 |
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