CN116892612A - Dual-clutch gearbox heavy-load starting control method and system - Google Patents
Dual-clutch gearbox heavy-load starting control method and system Download PDFInfo
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- CN116892612A CN116892612A CN202311062728.2A CN202311062728A CN116892612A CN 116892612 A CN116892612 A CN 116892612A CN 202311062728 A CN202311062728 A CN 202311062728A CN 116892612 A CN116892612 A CN 116892612A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 68
- 230000009977 dual effect Effects 0.000 claims description 46
- 101150102678 clu1 gene Proteins 0.000 claims description 22
- 230000001133 acceleration Effects 0.000 claims description 18
- 238000004590 computer program Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 5
- 238000013021 overheating Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003491 array Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Classifications
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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
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D48/00—External control of clutches
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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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/14—Inputs being a function of torque or torque demand
- F16H59/16—Dynamometric measurement of torque
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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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/36—Inputs being a function of speed
- F16H59/44—Inputs being a function of speed dependent on machine speed of the machine, e.g. the 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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/50—Inputs being a function of the status of the machine, e.g. position of doors or safety belts
- F16H59/54—Inputs being a function of the status of the machine, e.g. position of doors or safety belts dependent on signals from the brakes, e.g. parking brakes
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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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/60—Inputs being a function of ambient conditions
- F16H59/66—Road conditions, e.g. slope, slippery
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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
-
- 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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/14—Inputs being a function of torque or torque demand
- F16H2059/147—Transmission input torque, e.g. measured or estimated engine torque
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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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/14—Inputs being a function of torque or torque demand
- F16H2059/148—Transmission output torque, e.g. measured or estimated torque at output drive shaft
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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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/60—Inputs being a function of ambient conditions
- F16H59/66—Road conditions, e.g. slope, slippery
- F16H2059/663—Road slope
Abstract
The invention provides a method and a system for controlling heavy-load starting of a double-clutch gearbox, wherein the method comprises the following steps: when the starting of the vehicle is detected, the running state of the vehicle is detected in real time, and whether the current vehicle is in a heavy-load starting working condition is judged according to the running state; if yes, acquiring real-time working parameters of a double-clutch gearbox and a real-time working state of a brake pedal in the current vehicle in real time, and judging whether the double-clutch gearbox enters a double-clutch starting state according to the real-time working parameters and the real-time working state, wherein the double-clutch gearbox comprises a first clutch and a second clutch; if yes, corresponding transmission torques are distributed to the first clutch and the second clutch based on a preset rule, and the transmission torques are transmitted to wheel ends of the vehicle through the first clutch and the second clutch respectively. The clutch plate can be prevented from overheating, and the usability of the gearbox is improved.
Description
Technical Field
The invention relates to the technical field of double-clutch gearboxes, in particular to a double-clutch gearbox heavy-load starting control method and system.
Background
Along with the progress of science and technology and the rapid development of productivity, automobiles are popularized in daily life of people, and become one of the indispensable transportation means for people to travel, so that the travel efficiency of people is greatly improved.
The method comprises the steps that a large-load starting working condition is met in the using process of an existing fuel vehicle, in the process, the target starting rotating speed of an automatic gear double-clutch gearbox is calculated by taking an accelerator opening value as an input variable table, so that the large-load starting means long-time, large-torque and high-rotating-speed difference friction starting for the double-clutch gearbox, a large amount of heat is generated in the whole starting process, one part of heat can be taken away by cooling oil liquid, the other part of heat can be left in a clutch plate to exist in a temperature mode, the temperature of the clutch plate can be quickly increased, and the performance of the clutch is reduced or thermal protection can be generated.
Aiming at the working condition of heavy-load starting of the dual-clutch gearbox, most of the prior art improves the heat dissipation capacity of the gearbox by reducing the heat in clutch hardware or increasing the flow of cooling oil, however, the output torque transmitted to the wheel end of the vehicle by the gearbox can be reduced in the implementation process, so that the acceleration performance of the vehicle is reduced, and the use experience of a user is correspondingly reduced.
Disclosure of Invention
Based on the above, the invention aims to provide a control method and a system for heavy-load starting of a double-clutch gearbox, which are used for solving the technical problem that in the prior art, a clutch plate is overheated in the process of heavy-load starting of the double-clutch gearbox.
The first aspect of the embodiment of the invention provides:
a dual clutch transmission heavy load launch control method, wherein the method comprises:
when the starting of the vehicle is detected, detecting the running state of the vehicle in real time, and judging whether the vehicle is in a heavy-load starting working condition currently according to the running state;
if the current vehicle is in the heavy-load starting working condition according to the running state, acquiring real-time working parameters of a double-clutch gearbox and a real-time working state of a brake pedal in the current vehicle in real time, and judging whether the double-clutch gearbox enters the double-clutch starting state according to the real-time working parameters and the real-time working state, wherein the double-clutch gearbox comprises a first clutch and a second clutch;
and if the dual-clutch gearbox enters the dual-clutch starting state according to the real-time working parameters and the real-time working state, distributing corresponding transmission torques to the first clutch and the second clutch based on preset rules, and transmitting the transmission torques to the wheel end of the vehicle through the first clutch and the second clutch respectively.
The beneficial effects of the invention are as follows: through real-time detection of the running state of the vehicle, whether the current vehicle is in a heavy-load starting working condition can be correspondingly obtained, further, real-time working parameters of a double-clutch gearbox and the real-time working state of a brake pedal in the vehicle are obtained in real time, whether the current double-clutch gearbox can enter the double-clutch starting state or not can be correspondingly obtained based on the real-time working parameters, and further, if so, the torque output by an engine can be correspondingly transmitted to a first clutch and a second clutch respectively through different transmission paths, so that heat generated by friction can be effectively prevented from being concentrated on one clutch, overheating of clutch plates can be effectively avoided, the service performance of the gearbox is correspondingly improved, and the use experience of a user is improved.
Further, the step of judging whether the vehicle is currently under a heavy-load starting condition according to the running state includes:
when the vehicle is detected to be in a forward state, detecting the speed of the vehicle in real time, and calculating the corresponding gradient of the road on which the vehicle is currently driven in real time based on a first preset algorithm according to the speed of the vehicle;
judging whether the angle corresponding to the gradient is larger than a preset angle threshold value or not in real time;
if the angle corresponding to the gradient is judged to be larger than the preset angle threshold in real time, judging that the vehicle is in the heavy-load starting working condition currently;
or judging whether the output torque of an engine of the vehicle is larger than a preset torque threshold value and the speed of the non-driving wheels is smaller than a preset rotating speed threshold value in real time;
and if the output torque of the engine of the vehicle is larger than the preset torque threshold value and the speed of the non-driving wheels is smaller than the preset rotating speed threshold value, judging that the vehicle is in a pit-sinking state currently, and entering the heavy-load starting working condition.
Further, the expression of the first preset algorithm is:
wherein slope represents the current slope value of the position of the vehicle, dvel represents the actual acceleration value of the vehicle, G vehicle Representing the acceleration component of the vehicle in the direction of travel, G represents the normal gravitational acceleration.
Further, the step of judging whether the dual clutch transmission enters a dual clutch starting state according to the real-time working parameter and the real-time working state includes:
extracting the oil temperature of the gearbox, the rotating speed of the input shaft, the temperature of the clutch and the gear of the transmission contained in the real-time working parameters in real time, and judging whether the brake pedal is in a braking state according to the real-time working state;
if the brake pedal is not in the braking state according to the real-time working state, judging whether the oil temperature of the gearbox, the rotating speed of the input shaft, the clutch temperature and the gear of the gearbox all meet preset requirements in real time;
and if the oil temperature of the gearbox, the rotating speed of the input shaft, the clutch temperature and the gear of the gearbox all meet the preset requirements in real time, judging that the double-clutch gearbox enters the double-clutch starting state.
Further, the step of allocating corresponding transmission torques to the first clutch and the second clutch based on a preset rule includes:
acquiring the output torque, a torque deviation value, a non-driving wheel speed and a first preset target torque limit value of an engine in the vehicle in real time;
and if the non-driving wheel speed is detected to be smaller than a preset speed threshold, calculating a first target torque transmitted to the first clutch and a second target torque transmitted to the second clutch according to the output torque, the torque deviation value and the first preset target torque limit value.
Further, the step of calculating the first target torque transferred to the first clutch and the second target torque transferred to the second clutch according to the output torque, the torque deviation value and the first preset target torque limit value includes:
calculating the first target torque according to the engine output torque, the torque deviation value, the first preset target torque limit value and a second preset algorithm, wherein the expression of the second preset algorithm is as follows:
T clu1 ＝Min(T engine -T error ，T lim )
wherein T is clu1 Representing the first target torque, T engine Represents the output torque of the engine, T err o r Representing the torque deviation value, T lim Representing the first preset target torque limit.
Further, the step of calculating the first target torque transferred to the first clutch and the second target torque transferred to the second clutch according to the output torque, the torque deviation value and the first preset target torque limit value includes:
calculating the second target torque according to the first target torque based on a third preset algorithm, wherein the expression of the third preset algorithm is as follows:
T clu2 ＝Max(0,T engine -T error -T clu1 )
wherein T is clu1 Representing the first target torque, T clu2 Representing the second target torque, T engine Represents the output torque of the engine, T error Representing the torque offset value.
A second aspect of an embodiment of the present invention proposes:
a dual clutch transmission heavy load launch control system, wherein the system comprises:
the detection module is used for detecting the running state of the vehicle in real time when the starting of the vehicle is detected, and judging whether the vehicle is in a heavy-load starting working condition currently according to the running state;
the judging module is used for acquiring the real-time working parameters of the double-clutch gearbox and the real-time working state of the brake pedal in the vehicle in real time if the vehicle is in the heavy-load starting working condition according to the running state, judging whether the double-clutch gearbox enters the double-clutch starting state according to the real-time working parameters and the real-time working state, wherein the double-clutch gearbox comprises a first clutch and a second clutch;
and the execution module is used for distributing corresponding transmission torque to the first clutch and the second clutch based on a preset rule and transmitting the transmission torque to the wheel end of the vehicle through the first clutch and the second clutch respectively if the double-clutch gearbox is judged to enter the double-clutch starting state according to the real-time working parameters and the real-time working state.
Further, the detection module is specifically configured to:
when the vehicle is detected to be in a forward state, detecting the speed of the vehicle in real time, and calculating the corresponding gradient of the road on which the vehicle is currently driven in real time based on a first preset algorithm according to the speed of the vehicle;
judging whether the angle corresponding to the gradient is larger than a preset angle threshold value or not in real time;
if the angle corresponding to the gradient is judged to be larger than the preset angle threshold in real time, judging that the vehicle is in the heavy-load starting working condition currently;
or judging whether the output torque of an engine of the vehicle is larger than a preset torque threshold value and the speed of the non-driving wheels is smaller than a preset rotating speed threshold value in real time;
and if the output torque of the engine of the vehicle is larger than the preset torque threshold value and the speed of the non-driving wheels is smaller than the preset rotating speed threshold value, judging that the vehicle is in a pit-sinking state currently, and entering the heavy-load starting working condition.
Further, the expression of the first preset algorithm is:
wherein slope represents the current slope value of the position of the vehicle, dvel represents the actual acceleration value of the vehicle, G vehicle Representing the acceleration component of the vehicle in the direction of travel, G represents the normal gravitational acceleration.
Further, the judging module is specifically configured to:
extracting the oil temperature of the gearbox, the rotating speed of the input shaft, the temperature of the clutch and the gear of the transmission contained in the real-time working parameters in real time, and judging whether the brake pedal is in a braking state according to the real-time working state;
if the brake pedal is not in the braking state according to the real-time working state, judging whether the oil temperature of the gearbox, the rotating speed of the input shaft, the clutch temperature and the gear of the gearbox all meet preset requirements in real time;
and if the oil temperature of the gearbox, the rotating speed of the input shaft, the clutch temperature and the gear of the gearbox all meet the preset requirements in real time, judging that the double-clutch gearbox enters the double-clutch starting state.
Further, the execution module is specifically configured to:
acquiring the output torque, a torque deviation value, a non-driving wheel speed and a first preset target torque limit value of an engine in the vehicle in real time;
and if the non-driving wheel speed is detected to be smaller than a preset speed threshold, calculating a first target torque transmitted to the first clutch and a second target torque transmitted to the second clutch according to the output torque, the torque deviation value and the first preset target torque limit value.
Further, the execution module is specifically configured to:
calculating the first target torque according to the engine output torque, the torque deviation value, the first preset target torque limit value and a second preset algorithm, wherein the expression of the second preset algorithm is as follows:
T clu1 ＝Min(T engine -T error ，T lim )
wherein T is clu1 Representing the first target torque, T engine Represents the output torque of the engine, T err o r Representing the torque deviation value, T lim Representing the first preset target torque limit.
Further, the execution module is specifically further configured to:
calculating the second target torque according to the first target torque based on a third preset algorithm, wherein the expression of the third preset algorithm is as follows:
T clu2 ＝Max(0,T engine -T error -T clu1 )
wherein T is clu1 Representing the first target torque, T clu2 Representing the second target torque, T engine Represents the output torque of the engine, T error Representing the torque offset value.
A third aspect of an embodiment of the present invention proposes:
a computer comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the dual clutch transmission heavy load launch control method as described above when executing the computer program.
A fourth aspect of the embodiment of the present invention proposes:
a readable storage medium having stored thereon a computer program, wherein the program when executed by a processor implements the dual clutch transmission heavy launch control method as described above.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a flow chart of a method for controlling heavy load start of a dual clutch transmission according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a heavy load start condition in a heavy load start control method for a dual clutch transmission according to a second embodiment of the present invention;
FIG. 3 is a schematic diagram of a dual clutch transmission according to a fifth embodiment of the present invention;
FIG. 4 is a parameter chart of the dual clutch transmission according to the first embodiment of the present invention when the dual clutch transmission is not in the dual clutch starting state;
FIG. 5 is a parameter chart of the dual clutch transmission according to the first embodiment of the present invention when the dual clutch transmission enters a dual clutch start state;
fig. 6 is a block diagram of a dual clutch transmission heavy load start control system according to a sixth embodiment of the present invention.
The invention will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Several embodiments of the invention are presented in the figures. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a method for controlling heavy load start of a dual clutch transmission according to a first embodiment of the present invention is shown, where the method for controlling heavy load start of a dual clutch transmission according to the present embodiment can effectively avoid overheating of clutch plates, correspondingly improve usability of the transmission, and improve use experience of a user.
Specifically, the method for controlling heavy-load starting of the dual-clutch gearbox provided by the embodiment specifically comprises the following steps:
step S10, when the starting of the vehicle is detected, detecting the running state of the vehicle in real time, and judging whether the vehicle is in a heavy-load starting working condition currently according to the running state;
step S20, if the current vehicle is in the heavy-load starting working condition according to the running state, acquiring the current real-time working parameters of the double-clutch gearbox and the real-time working state of a brake pedal in the vehicle in real time, and judging whether the double-clutch gearbox enters the double-clutch starting state according to the real-time working parameters and the real-time working state, wherein the double-clutch gearbox comprises a first clutch and a second clutch;
and step S30, if the dual clutch gearbox enters the dual clutch starting state according to the real-time working parameters and the real-time working state, distributing corresponding transmission torques to the first clutch and the second clutch based on preset rules, and transmitting the transmission torques to the wheel end of the vehicle through the first clutch and the second clutch respectively.
Specifically, in the embodiment, it should be firstly explained that the method for controlling the heavy load starting of the dual clutch transmission provided in the embodiment is specifically applied to a heavy load condition that a vehicle mounted with the dual clutch transmission is in a pit, gets out of order or climbs, and the like, so as to avoid the phenomenon that a clutch plate is overheated. Based on the above, when the whole vehicle controller detects the starting of the vehicle in real time, the running state of the current vehicle is immediately detected, namely signals such as the speed of the current vehicle, the position of the gear lever, the clutch temperature, the output torque of the engine and the like are obtained in real time, and further, whether the current vehicle is under a heavy-load starting working condition can be judged in real time. Specifically, if so, further real-time working parameters of the double clutch in the current vehicle and the real-time working state of the brake pedal are required to be obtained in real time, and meanwhile, whether the double clutch gearbox in the current vehicle meets the requirement of entering the double clutch starting state can be further judged according to the current real-time working parameters and the real-time working state.
Further, if the whole vehicle controller judges that the double-clutch gearbox in the current vehicle meets the requirement of entering a double-clutch starting state, the first clutch and the second clutch in the current double-clutch gearbox can be started at the same time, and the torque output by the engine is reasonably distributed to the current first clutch and the current second clutch according to preset rules, so that the transmission torque output by the engine can be finally transmitted to the wheel end of the current vehicle through the current first clutch and the current second clutch.
Second embodiment
Specifically, in this embodiment, it should be noted that the step of determining whether the vehicle is currently in the heavy-load starting condition according to the driving state includes:
when the vehicle is detected to be in a forward state, detecting the speed of the vehicle in real time, and calculating the corresponding gradient of the road on which the vehicle is currently driven in real time based on a first preset algorithm according to the speed of the vehicle;
judging whether the angle corresponding to the gradient is larger than a preset angle threshold value or not in real time;
if the angle corresponding to the gradient is judged to be larger than the preset angle threshold in real time, judging that the vehicle is in the heavy-load starting working condition currently;
or judging whether the output torque of an engine of the vehicle is larger than a preset torque threshold value and the speed of the non-driving wheels is smaller than a preset rotating speed threshold value in real time;
and if the output torque of the engine of the vehicle is larger than the preset torque threshold value and the speed of the non-driving wheels is smaller than the preset rotating speed threshold value, judging that the vehicle is in a pit-sinking state currently, and entering the heavy-load starting working condition.
Specifically, in this embodiment, it should be noted that, in order to accurately determine whether the current vehicle is under a heavy-load starting condition, the speed of the current vehicle may be detected in real time, and meanwhile, the gradient corresponding to the road on which the current vehicle is running may be correspondingly calculated according to the speed of the current vehicle and a preset first preset algorithm, and at the same time, whether the angle corresponding to the current gradient is greater than a preset angle threshold value is determined in real time, preferably, the current preset angle threshold value may be 25 degrees, 40 degrees, and the like.
Further, if the angle corresponding to the current gradient is judged to be larger than the preset angle threshold in real time, the current vehicle can be accurately judged to be in the heavy-load starting working condition.
Specifically, in this embodiment, it should also be noted that, the expression of the first preset algorithm is:
wherein slope represents the current slope value of the position of the vehicle, dvel represents the actual acceleration value of the vehicle, G vehicle Representing the acceleration component of the vehicle in the direction of travel, G represents the normal gravitational acceleration.
Specifically, in the present embodiment, it is also noted that, after the required vehicle speed is obtained through the above steps, the actual acceleration of the current vehicle and the acceleration component in the traveling direction can be further calculated, and based on this, the gradient corresponding to the road on which the current vehicle travels can be calculated immediately according to the first preset algorithm correspondence.
Third embodiment
In addition, in this embodiment, it should be noted that the step of determining whether the dual clutch gearbox enters the dual clutch starting state according to the real-time working parameter and the real-time working state includes:
extracting the oil temperature of the gearbox, the rotating speed of the input shaft, the temperature of the clutch and the gear of the transmission contained in the real-time working parameters in real time, and judging whether the brake pedal is in a braking state according to the real-time working state;
if the brake pedal is not in the braking state according to the real-time working state, judging whether the oil temperature of the gearbox, the rotating speed of the input shaft, the clutch temperature and the gear of the gearbox all meet preset requirements in real time;
and if the oil temperature of the gearbox, the rotating speed of the input shaft, the clutch temperature and the gear of the gearbox all meet the preset requirements in real time, judging that the double-clutch gearbox enters the double-clutch starting state.
In addition, in this embodiment, after the required real-time operating parameters of the dual clutch transmission are obtained through the above steps, parameters such as the transmission oil temperature, the input shaft rotational speed, the clutch temperature, and the transmission gear included in the current real-time operating parameters are further extracted, based on which it is further determined whether the brake pedal of the current vehicle is in a braking state, specifically, if not, it is further determined whether the parameters of the transmission oil temperature, the input shaft rotational speed, the clutch temperature, and the transmission gear all meet preset requirements. More specifically, if yes, it can be directly determined that the current dual clutch gearbox can enter the dual clutch starting state, preferably, the embodiment can determine in real time whether the oil temperature of the gearbox is higher than 110 degrees, whether the rotation speed of the input shaft is higher than 450 revolutions per second, whether the clutch temperature is higher than 130 degrees and whether the gear of the gearbox is in 2 gears, and further, the dual clutch starting state can be entered only on the premise that the current four parameters simultaneously meet the preset requirements.
Fourth embodiment
In addition, in the present embodiment, it should be further noted that the step of allocating the corresponding transmission torques to the first clutch and the second clutch based on the preset rule includes:
acquiring the output torque, a torque deviation value, a non-driving wheel speed and a first preset target torque limit value of an engine in the vehicle in real time;
and if the non-driving wheel speed is detected to be smaller than a preset speed threshold, calculating a first target torque transmitted to the first clutch and a second target torque transmitted to the second clutch according to the output torque, the torque deviation value and the first preset target torque limit value.
In addition, in this embodiment, it should be further noted that, in order to reasonably allocate corresponding transmission torques to the first clutch and the second clutch, the output torque, the torque deviation value and the first preset target torque limit value of the engine in the current vehicle are further obtained in real time, and then, only the current output torque, the torque deviation value and the first preset target torque limit value are input into preset algorithms respectively, so that the first target torque transferred to the first clutch and the second target torque transferred to the second clutch can be finally calculated, thereby facilitating subsequent processing.
Fifth embodiment
In this embodiment, it should be noted that the step of calculating the first target torque transmitted to the first clutch and the second target torque transmitted to the second clutch according to the output torque, the torque deviation value and the first preset target torque limit value includes:
calculating the first target torque according to the engine output torque, the torque deviation value, the first preset target torque limit value and a second preset algorithm, wherein the expression of the second preset algorithm is as follows:
T clu1 ＝Min(T engine -T error ，T lim )
wherein T is clu1 Representing the first target torque, T engine Represents the output torque of the engine, T error Representing the torque deviation value, T lim Representing the first preset target torque limit.
Further, the first target torque can be correspondingly calculated according to the engine output torque, the torque deviation value, the first preset target torque limit value and the preset second preset algorithm which are obtained in real time.
In this embodiment, it should be noted that the step of calculating the first target torque transmitted to the first clutch and the second target torque transmitted to the second clutch according to the output torque, the torque deviation value and the first preset target torque limit value includes:
calculating the second target torque according to the first target torque based on a third preset algorithm, wherein the expression of the third preset algorithm is as follows:
T clu2 ＝Max(0,T engine -T error -T clu1 )
wherein T is clu1 Representing the first target torque, T clu2 Representing the second target torque, T engine Represents the output torque of the engine, T error Representing the torque offset value.
In this embodiment, it should be noted that, in the same way, the second target torque can be correspondingly calculated according to the third preset algorithm immediately after the first target torque is obtained through the above steps.
Further, after the first target torque and the second target torque are obtained through the steps, the torque transmitted to the wheel end is further calculated through a fourth preset algorithm, and specifically, the expression of the fourth preset algorithm is as follows:
T wheel ＝T clu1 *I ratio1 +T clu2 *I ratio2
wherein T is wheel Representing the output torque at the wheel end, T clu1 Representing a first target torque, I ration1 Representing first gear ratio, T clu2 Representing a second target torque, I ration Representing a second gear ratio.
Referring to fig. 4, a sixth embodiment of the present invention provides:
a dual clutch transmission heavy load launch control system, wherein the system comprises:
the detection module is used for detecting the running state of the vehicle in real time when the starting of the vehicle is detected, and judging whether the vehicle is in a heavy-load starting working condition currently according to the running state;
the judging module is used for acquiring the real-time working parameters of the double-clutch gearbox and the real-time working state of the brake pedal in the vehicle in real time if the vehicle is in the heavy-load starting working condition according to the running state, judging whether the double-clutch gearbox enters the double-clutch starting state according to the real-time working parameters and the real-time working state, wherein the double-clutch gearbox comprises a first clutch and a second clutch;
and the execution module is used for distributing corresponding transmission torque to the first clutch and the second clutch based on a preset rule and transmitting the transmission torque to the wheel end of the vehicle through the first clutch and the second clutch respectively if the double-clutch gearbox is judged to enter the double-clutch starting state according to the real-time working parameters and the real-time working state.
In the dual clutch transmission heavy-load starting control system, the detection module is specifically configured to:
when the vehicle is detected to be in a forward state, detecting the speed of the vehicle in real time, and calculating the corresponding gradient of the road on which the vehicle is currently driven in real time based on a first preset algorithm according to the speed of the vehicle;
judging whether the angle corresponding to the gradient is larger than a preset angle threshold value or not in real time;
if the angle corresponding to the gradient is judged to be larger than the preset angle threshold in real time, judging that the vehicle is in the heavy-load starting working condition currently;
or judging whether the output torque of an engine of the vehicle is larger than a preset torque threshold value and the speed of the non-driving wheels is smaller than a preset rotating speed threshold value in real time;
and if the output torque of the engine of the vehicle is larger than the preset torque threshold value and the speed of the non-driving wheels is smaller than the preset rotating speed threshold value, judging that the vehicle is in a pit-sinking state currently, and entering the heavy-load starting working condition.
In the dual-clutch gearbox heavy-load starting control system, the expression of the first preset algorithm is as follows:
wherein slope represents the current slope value of the position of the vehicle, dvel represents the actual acceleration value of the vehicle, G vehicle Representing the acceleration component of the vehicle in the direction of travel, G represents the normal gravitational acceleration.
In the dual clutch transmission heavy-load starting control system, the judging module is specifically configured to:
extracting the oil temperature of the gearbox, the rotating speed of the input shaft, the temperature of the clutch and the gear of the transmission contained in the real-time working parameters in real time, and judging whether the brake pedal is in a braking state according to the real-time working state;
if the brake pedal is not in the braking state according to the real-time working state, judging whether the oil temperature of the gearbox, the rotating speed of the input shaft, the clutch temperature and the gear of the gearbox all meet preset requirements in real time;
and if the oil temperature of the gearbox, the rotating speed of the input shaft, the clutch temperature and the gear of the gearbox all meet the preset requirements in real time, judging that the double-clutch gearbox enters the double-clutch starting state.
In the dual clutch transmission high-load starting control system, the execution module is specifically configured to:
acquiring the output torque, a torque deviation value, a non-driving wheel speed and a first preset target torque limit value of an engine in the vehicle in real time;
and if the non-driving wheel speed is detected to be smaller than a preset speed threshold, calculating a first target torque transmitted to the first clutch and a second target torque transmitted to the second clutch according to the output torque, the torque deviation value and the first preset target torque limit value.
In the dual clutch transmission high-load starting control system, the execution module is specifically configured to:
calculating the first target torque according to the engine output torque, the torque deviation value, the first preset target torque limit value and a second preset algorithm, wherein the expression of the second preset algorithm is as follows:
T clu1 ＝Min(T engine -T error ’T lim )
wherein T is clu1 Representing the first target torque, T engine Represents the output torque of the engine, T err o r Representing the torque deviation value, T lim Representing the first preset target torque limit.
In the dual clutch transmission high-load starting control system, the execution module is further specifically configured to:
calculating the second target torque according to the first target torque based on a third preset algorithm, wherein the expression of the third preset algorithm is as follows:
T clu2 ＝Max(0,T engine -T error -T clu1 )
wherein T is clu1 Representing the first target torque, T clu2 Representing the second target torque, T engine Represents the output torque of the engine, T error Representing the torque offset value.
A seventh embodiment of the present invention provides a computer, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor implements the dual clutch transmission heavy load start control method provided in the above embodiment when executing the computer program.
An eighth embodiment of the present invention provides a readable storage medium having a computer program stored thereon, wherein the program when executed by a processor implements the dual clutch transmission heavy load launch control method provided by the above embodiment.
In summary, the method and the system for controlling the heavy-load starting of the dual-clutch transmission provided by the embodiment of the invention can effectively avoid overheat of the clutch plates, correspondingly improve the service performance of the transmission, and improve the use experience of users.
The above-described respective modules may be functional modules or program modules, and may be implemented by software or hardware. For modules implemented in hardware, the various modules described above may be located in the same processor; or the above modules may be located in different processors in any combination.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. The method for controlling the heavy-load starting of the double-clutch gearbox is characterized by comprising the following steps of:
when the starting of the vehicle is detected, detecting the running state of the vehicle in real time, and judging whether the vehicle is in a heavy-load starting working condition currently according to the running state;
if the current vehicle is in the heavy-load starting working condition according to the running state, acquiring real-time working parameters of a double-clutch gearbox and a real-time working state of a brake pedal in the current vehicle in real time, and judging whether the double-clutch gearbox enters the double-clutch starting state according to the real-time working parameters and the real-time working state, wherein the double-clutch gearbox comprises a first clutch and a second clutch;
and if the dual-clutch gearbox enters the dual-clutch starting state according to the real-time working parameters and the real-time working state, distributing corresponding transmission torques to the first clutch and the second clutch based on preset rules, and transmitting the transmission torques to the wheel end of the vehicle through the first clutch and the second clutch respectively.
2. The dual clutch transmission heavy load start control method according to claim 1, characterized in that: the step of judging whether the vehicle is in a heavy-load starting working condition according to the running state comprises the following steps:
when the vehicle is detected to be in a forward state, detecting the speed of the vehicle in real time, and calculating the corresponding gradient of the road on which the vehicle is currently driven in real time based on a first preset algorithm according to the speed of the vehicle;
judging whether the angle corresponding to the gradient is larger than a preset angle threshold value or not in real time;
if the angle corresponding to the gradient is judged to be larger than the preset angle threshold in real time, judging that the vehicle is in the heavy-load starting working condition currently;
or judging whether the output torque of an engine of the vehicle is larger than a preset torque threshold value and the speed of the non-driving wheels is smaller than a preset rotating speed threshold value in real time;
and if the output torque of the engine of the vehicle is larger than the preset torque threshold value and the speed of the non-driving wheels is smaller than the preset rotating speed threshold value, judging that the vehicle is in a pit-sinking state currently, and entering the heavy-load starting working condition.
3. The dual clutch transmission heavy load start control method according to claim 2, characterized in that: the expression of the first preset algorithm is as follows:
wherein slope represents the current slope value of the position of the vehicle, dvel represents the actual acceleration value of the vehicle, G vehicle Representing the acceleration component of the vehicle in the direction of travel, G represents the normal gravitational acceleration.
4. The dual clutch transmission heavy load start control method according to claim 1, characterized in that: the step of judging whether the dual clutch transmission enters a dual clutch starting state according to the real-time working parameters and the real-time working state comprises the following steps:
extracting the oil temperature of the gearbox, the rotating speed of the input shaft, the temperature of the clutch and the gear of the transmission contained in the real-time working parameters in real time, and judging whether the brake pedal is in a braking state according to the real-time working state;
if the brake pedal is not in the braking state according to the real-time working state, judging whether the oil temperature of the gearbox, the rotating speed of the input shaft, the clutch temperature and the gear of the gearbox all meet preset requirements in real time;
and if the oil temperature of the gearbox, the rotating speed of the input shaft, the clutch temperature and the gear of the gearbox all meet the preset requirements in real time, judging that the double-clutch gearbox enters the double-clutch starting state.
5. The dual clutch transmission heavy load start control method according to claim 1, characterized in that: the step of allocating corresponding transmission torques to the first clutch and the second clutch based on a preset rule includes:
acquiring the output torque, a torque deviation value, a non-driving wheel speed and a first preset target torque limit value of an engine in the vehicle in real time;
and if the non-driving wheel speed is detected to be smaller than a preset speed threshold, calculating a first target torque transmitted to the first clutch and a second target torque transmitted to the second clutch according to the output torque, the torque deviation value and the first preset target torque limit value.
6. The double clutch transmission heavy load start control method according to claim 5, characterized in that: the step of calculating the first target torque transferred to the first clutch and the second target torque transferred to the second clutch according to the output torque, the torque deviation value and the first preset target torque limit value comprises the following steps:
calculating the first target torque according to the engine output torque, the torque deviation value, the first preset target torque limit value and a second preset algorithm, wherein the expression of the second preset algorithm is as follows:
T clu1 ＝Min(T engine -T error ，T lim )
wherein T is clu1 Representing the first target torque, T engine Represents the output torque of the engine, T error Representing the torque deviation value, T lim Representing the first preset target torque limit.
7. The dual clutch transmission heavy load start control method according to claim 6, characterized in that: the step of calculating the first target torque transferred to the first clutch and the second target torque transferred to the second clutch according to the output torque, the torque deviation value and the first preset target torque limit value comprises the following steps:
calculating the second target torque according to the first target torque based on a third preset algorithm, wherein the expression of the third preset algorithm is as follows:
T clu2 ＝Max(0,T engine -T error -T clu1 )
wherein T is clu1 Representing the first target torque, T clu2 Representing the second target torque, T engine Represents the output torque of the engine, T error Representing the torque offset value.
8. A dual clutch transmission heavy load launch control system, the system comprising:
the detection module is used for detecting the running state of the vehicle in real time when the starting of the vehicle is detected, and judging whether the vehicle is in a heavy-load starting working condition currently according to the running state;
the judging module is used for acquiring the real-time working parameters of the double-clutch gearbox and the real-time working state of the brake pedal in the vehicle in real time if the vehicle is in the heavy-load starting working condition according to the running state, judging whether the double-clutch gearbox enters the double-clutch starting state according to the real-time working parameters and the real-time working state, wherein the double-clutch gearbox comprises a first clutch and a second clutch;
and the execution module is used for distributing corresponding transmission torque to the first clutch and the second clutch based on a preset rule and transmitting the transmission torque to the wheel end of the vehicle through the first clutch and the second clutch respectively if the double-clutch gearbox is judged to enter the double-clutch starting state according to the real-time working parameters and the real-time working state.
9. A computer comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor, when executing the computer program, implements the dual clutch transmission heavy load launch control method of any one of claims 1 to 7.
10. A readable storage medium having stored thereon a computer program, which when executed by a processor, implements the dual clutch transmission heavy load launch control method according to any one of claims 1 to 7.
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| CN202311062728.2A CN116892612A (en) | 2023-08-22 | 2023-08-22 | Dual-clutch gearbox heavy-load starting control method and system |
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