CN111071255B - Overheating protection control method for dual-clutch automatic transmission - Google Patents
Overheating protection control method for dual-clutch automatic transmission Download PDFInfo
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- CN111071255B CN111071255B CN201911426343.3A CN201911426343A CN111071255B CN 111071255 B CN111071255 B CN 111071255B CN 201911426343 A CN201911426343 A CN 201911426343A CN 111071255 B CN111071255 B CN 111071255B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/18—Propelling the vehicle
- B60W30/184—Preventing damage resulting from overload or excessive wear of the driveline
- B60W30/186—Preventing damage resulting from overload or excessive wear of the driveline excessive wear or burn out of friction elements, e.g. clutches
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/18—Conjoint control of vehicle sub-units of different type or different function including control of braking systems
- B60W10/182—Conjoint control of vehicle sub-units of different type or different function including control of braking systems including control of parking brakes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/08—Interaction between the driver and the control system
- B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/02—Clutches
- B60W2510/0291—Clutch temperature
Abstract
The invention provides an overheating protection control method for a dual-clutch automatic transmission, relates to the field of transmissions, and solves the problem of how to improve the safety of a vehicle when the dual-clutch automatic transmission is overheated. The method comprises the steps that when a vehicle climbs on a slope for a long time, a gearbox control system identifies the climbing working condition by comparing a road inclination angle alpha with a preset inclination angle beta 1, when the angle alpha is larger than the angle beta 1, the gearbox control system monitors the temperatures TC1 and TC2 of clutches C1 and C2, the gearbox control system is provided with a plurality of preset temperatures, if any one of TC1 and TC2 is increased to one of the preset temperatures, the gearbox control system controls the clamping force of an electronic parking control system to reach a corresponding preset calibration value and controls an engine control system to enter a corresponding clutch slope protection mode, and an instrument prompts that the clutch is overheated. The method can improve the safety of the vehicle and the driving experience during long-time climbing.
Description
Technical Field
The invention relates to the field of transmissions, in particular to an overheating protection control method for a dual-clutch automatic transmission.
Background
The double-clutch automatic transmission (DCT) comprises two automatically controlled clutches C1 and C2, and can simultaneously control the operation of the two clutches through electronic control and hydraulic pushing. DCT has the advantages of high transmission efficiency, short gear shifting time and uninterrupted power; however, due to the lack of a structure of the torque converter, when the DCT is in a low-speed long-slope creep working condition, the clutch plates are in a slipping state for a long time, and overheating is likely to cause thermal attenuation and even ablation of the clutch plates.
In order to solve the above-mentioned problems of the DCT, a method of preventing the clutch from overheating by urging the driver to step on the accelerator pedal by a slight movement of the vehicle is proposed, and as disclosed in chinese patent document No. 201510843925.7, the method may include: determining, with a controller, whether a state of a vehicle satisfies a hill hold condition; acquiring, with a controller, a temperature of a clutch between an engine and a transmission when a hill hold condition is satisfied; applying, with a controller, a first torque having a predetermined square wave shape to the clutch when the temperature of the clutch reaches a first temperature; and applying a second torque having a predetermined sine wave shape to the clutch with the controller when the temperature of the clutch reaches a second temperature higher than the first temperature.
However, the above method has the following drawbacks: the vehicle slightly moves and is possibly ignored by a driver, so that the condition that the clutch is overheated cannot be solved, and the vehicle has potential safety hazard.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides an overheating protection control method for a dual-clutch automatic transmission, which solves the technical problem of how to improve the safety of a vehicle when the dual-clutch automatic transmission is overheated.
The invention is realized by the following technical scheme: an overheating protection control method of a dual clutch automatic transmission is characterized in that,
s1, when the vehicle crawls on a slope for a long time, the gearbox control system acquires a road inclination angle alpha and a preset inclination angle beta 1 through a set sensor and compares the road inclination angle alpha and the preset inclination angle beta 1 to identify the slope crawling condition;
s2, when alpha is larger than beta 1, the temperature TC1 and TC2 of the clutches C1 and C2 are monitored by the gearbox control system;
and S3, setting a plurality of preset temperatures for the gearbox control system, and if any one of TC1 and TC2 is at one preset temperature, controlling the clamping force of the electronic parking control system to reach a corresponding preset calibration value by the gearbox control system and simultaneously controlling the engine control system to enter a corresponding clutch ramp protection mode, wherein the instrument prompts that the clutch is overheated.
The working principle of the invention is as follows: when a vehicle climbs on a slope for a long time, a gearbox control system acquires a road inclination angle alpha and a preset inclination angle beta 1 through a set sensor and compares the road inclination angle alpha with the preset inclination angle beta 1 to identify the slope climbing working condition, when the angle alpha is larger than the angle beta 1, the gearbox control system monitors the temperatures TC1 and TC2 of clutches C1 and C2, when any one of TC1 and TC2 is increased to the preset temperature, the gearbox control system controls the clamping force of an electronic parking control system to reach a preset calibration value and controls an engine control system to enter a clutch slope protection mode at the same time, and an instrument prompts that the clutch is overheated. The invention improves the safety of the vehicle when the clutch is overheated by adding the calibration values of the multi-section electronic parking control system under the multi-section preset temperature and the ramp protection mode, the electronic parking control system can realize automatic parking of the ramp and prevent the vehicle from moving backwards when the condition of the ramp occurs, the gearbox control system can control the electronic parking control system to clamp and avoid the vehicle from sliding backwards caused by the overheating of the clutch when the clutch is overheated, and the multi-section ramp protection mode is set, so that the misjudgment of the system can be reduced and the safety of the vehicle can also be improved. The electronic parking system is usually used for parking, and the system is used for preventing the clutch from being overheated by setting a plurality of calibration values, so that the safety of the vehicle is greatly improved.
In the above method for controlling overheat protection of a dual clutch automatic transmission, the step S3 may include:
s31, when any one of TC1 and TC2 is raised to a first preset temperature, the engine control system enters a first clutch hill protection mode;
s32, when any one of TC1 and TC2 is raised to a second preset temperature, the engine control system enters a second clutch hill protection mode;
when either of TC1 and TC2 rises to a third predetermined temperature, the engine control system enters a third clutch hill-hold mode.
The multi-section preset temperature and the clutch protection mode are set, so that the accuracy of judgment of the gearbox control device is improved, and the running safety of a vehicle is improved.
In the method for controlling the overheating protection of the dual-clutch automatic transmission, the first clutch ramp protection mode is that the clamping force of the electronic parking control system reaches a first preset calibration value, the engine enters a torque limiting mode, and the vehicle is slowly decelerated. The first clutch slope protection mode is used for reminding a driver, and the safety of the vehicle is improved.
In the above method for controlling overheat protection of a dual clutch automatic transmission, the step S31 may include:
s311, if the driver does not perform acceleration operation after the preset time t1, or the vehicle speed is reduced to the preset vehicle speed V0, the electronic parking control system is completely pulled up to realize vehicle parking;
and S312, if the accelerator opening is increased by the driver, the clutch enters a light sliding or locking state, and the vehicle continues to move forward.
The first clutch slope protection mode judges the driving intention and can assist a driver in driving.
In the method for controlling the overheating protection of the dual-clutch automatic transmission, the clamping force of the electronic parking control system reaches a second preset calibration value in the second clutch slope protection mode, the engine enters the torque limiting mode, the running resistance of the vehicle is increased, and the vehicle is slowly decelerated. The second clutch slope protection mode is set for limiting the driving of the vehicle, reminding a driver that the DCT temperature is higher, preventing the driver from continuing driving and improving the safety of the vehicle.
In the above method for controlling overheat protection of a dual clutch automatic transmission, the step S32 may include:
s321, if the driver does not perform acceleration operation after the preset time t2, or the vehicle speed is reduced to the preset vehicle speed V0, completely pulling up the electronic parking control system to park the vehicle;
and S322, if the accelerator opening degree is increased by the driver, the clutch enters a locking state, and the vehicle continues to move forwards.
The second clutch slope protection mode judges the driving intention and can assist a driver in driving.
In the above method for controlling the overheating protection of the dual clutch automatic transmission, in the third clutch ramp protection mode, the clamping force of the electronic parking control system reaches a third preset calibration value, the vehicle running resistance is increased, C1 and C2 are completely disengaged, and when the vehicle is slowly decelerated until V1, the electronic parking control system is completely pulled up to realize reliable parking of the vehicle. The third ramp protection mode is set for forced deceleration parking, the DCT is prevented from being overheated, the electronic parking control system can enable the vehicle to be stably parked, and the situation that the vehicle slips backwards due to the fact that the two clutches are disengaged is avoided.
In the overheating protection control method for the dual-clutch automatic transmission, the electronic parking control system, the engine control system and the instrument are all connected with the gearbox control system. The addition of the electronic parking control system can improve the stability of the vehicle when the DCT climbs the slope and is overheated.
Compared with the prior art, the control device for detecting electronic parking abuse has the advantages that:
1. the electronic parking control system is added for assisting, so that the influence of DCT overheating can be reduced, and the safety of the vehicle is improved.
2. The multi-section preset temperature and the slope protection mode are set, so that the driver can know the DCT condition, and the driving experience is improved.
Drawings
FIG. 1 is a schematic illustration of the steps of a dual clutch automatic transmission over-temperature protection control method.
FIG. 2 is a schematic illustration of a dual clutch automatic transmission over-temperature protection control method step S3.
FIG. 3 is a schematic illustration of steps S31 and S32 of a dual clutch automatic transmission over-temperature protection control method.
FIG. 4 is a schematic block diagram of a dual clutch automatic transmission over-temperature protection control method.
In the figure 1, a gearbox control system; 1a, a tilt angle sensor; 2. an electronic parking control system; 3. an engine control system; 4. instrument and meter
Detailed Description
In order to make the technical problems, technical solutions and advantages solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, 2 and 3, when the vehicle climbs on the slope for a long time, the gearbox control system acquires the road inclination angle alpha and the preset inclination angle beta 1 through the arranged sensors and compares the road inclination angle alpha and the preset inclination angle beta 1 to identify the climbing condition of the slope, when α > β 1, the transmission control system monitors the temperatures TC1 and TC2 of the clutches C1 and C2, if any one of TC1 and TC2 is heated to the temperature T1, the transmission control system controls the electronic parking control system and simultaneously controls the engine control system to enter a clutch hill protection mode I, the clamping force of the electronic parking control system reaches a calibrated value P1, the engine enters a torque limit mode, the vehicle decelerates slowly, an instrument indicates that the clutch is overheated, the step I of the clutch slope protection mode comprises that if the driver does not operate in an accelerating mode after the preset time t1, or the vehicle speed is reduced to the preset vehicle speed V0, the electronic parking control system is completely pulled up to realize the reliable parking of the vehicle; if the driver increases the opening degree of the accelerator, the clutch enters a light sliding or locking state, and the vehicle continues to move forward. If any one of TC1 and TC2 continues to rise to the temperature T2, the gearbox control system controls the electronic parking control system and simultaneously controls the engine control system to enter a clutch ramp protection mode II, the clamping force of the electronic parking control system reaches a calibrated value P2, the engine enters a torque limiting mode, the running resistance of the vehicle is increased, the vehicle decelerates slowly, and an instrument prompts that the clutch is overheated, wherein the clutch ramp protection mode II comprises that if the driver does not perform acceleration operation after the preset time T2, or the vehicle speed is reduced to the preset vehicle speed V0, the electronic parking control system is completely pulled up to realize the reliable parking of the vehicle; if the driver increases the accelerator opening, the clutch enters a locking state, and the vehicle continues to keep a certain speed. If any one of TC1 and TC2 is increased to a warning temperature T3, the transmission control system controls the electronic parking control system to control the engine control system to enter a clutch slope protection mode III at the same time, the clamping force of the electronic parking control system reaches a calibrated value P3, the running resistance of the vehicle is increased, C1 and C2 are completely disengaged, the vehicle is slowly decelerated until V1, the electronic parking control system is completely pulled up to realize reliable parking of the vehicle, and an instrument indicates that the clutch is overheated. T1> t2, V0> V1 and V1 approach 0, and the electronic parking control system clamping force P3> P2> P1.
As shown in fig. 4, the structure of the overheat protection control method for the dual clutch automatic transmission comprises a transmission control system 1, an inclination angle sensor 1a, an electronic parking control system 2, an engine control system 3 and a meter 4, wherein the electronic parking control system 2, the engine control system 3 and the meter 4 are all connected with the transmission control system 1. When the vehicle climbs on a slope for a long time, the gearbox control system 1 identifies the road working condition through the arranged inclination angle sensor 1a and controls the electronic parking control system 2 to clamp and control the engine control system 3 to reduce the vehicle speed and controls the instrument to display that the clutch is overheated.
The specific embodiments described herein are merely illustrative of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (8)
1. An overheating protection control method of a dual clutch automatic transmission is characterized in that,
s1, when the vehicle crawls on a slope for a long time, the gearbox control system acquires a road inclination angle alpha and a preset inclination angle beta 1 through a set sensor and compares the road inclination angle alpha and the preset inclination angle beta 1 to identify the slope crawling condition;
s2, when alpha is larger than beta 1, the temperature TC1 of the clutch C1 and the temperature TC2 of the clutch C2 are monitored by the gearbox control system;
and S3, setting a plurality of preset temperatures for the gearbox control system, and if any one of TC1 and TC2 is at one preset temperature, controlling the clamping force of the electronic parking control system to reach a corresponding preset calibration value by the gearbox control system and simultaneously controlling the engine control system to enter a corresponding clutch ramp protection mode, wherein the instrument prompts that the clutch is overheated.
2. The dual clutch automatic transmission overheat protection control method according to claim 1, wherein said step S3 includes:
s31, when any one of TC1 and TC2 is raised to a first preset temperature, the engine control system enters a first clutch hill protection mode;
s32, when any one of TC1 and TC2 is raised to a second preset temperature, the engine control system enters a second clutch hill protection mode;
s33, when either one of TC1 and TC2 rises to a third preset temperature, the engine control system enters a third clutch hill protection mode.
3. The dual clutch automatic transmission overheat protection control method according to claim 2, wherein the first clutch hill protection mode is that the clamping force of the electronic parking control system reaches a first preset calibration value, the engine enters a torque limit mode, and the vehicle decelerates slowly.
4. The dual clutch automatic transmission overheat protection control method according to claim 2, wherein said step S31 includes:
s311, if the driver does not perform acceleration operation after the preset time t1, or the vehicle speed is reduced to the preset vehicle speed V0, the electronic parking control system is completely pulled up to realize vehicle parking;
and S312, if the accelerator opening is increased by the driver, the clutch enters a light sliding or locking state, and the vehicle continues to move forward.
5. The dual clutch automatic transmission overheat protection control method according to claim 2, wherein the second clutch hill protection mode is that the electronic parking control system clamps to a second preset calibration value, the engine enters the torque limit mode, the vehicle running resistance increases, and the vehicle decelerates slowly.
6. The dual clutch automatic transmission overheat protection control method according to claim 2, wherein said step S32 includes:
s321, if the driver does not perform acceleration operation after the preset time t2, or the vehicle speed is reduced to the preset vehicle speed V0, the electronic parking control system is completely pulled up to realize reliable parking of the vehicle;
and S322, if the accelerator opening degree is increased by the driver, the clutch enters a locking state, and the vehicle continues to move forwards.
7. The dual clutch automatic transmission overheat protection control method according to claim 2, wherein the third clutch hill protection mode is that the clamping force of the electronic parking control system reaches a third preset calibration value, the vehicle running resistance is increased, C1 and C2 are completely disengaged, and when the vehicle is slowly decelerated until V1, the electronic parking control system is completely pulled up to realize reliable parking of the vehicle.
8. The dual clutch automatic transmission overheat protection control method according to claim 1, wherein the electronic parking control system, the engine control system and the meter are connected to a transmission control system.
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| CN201911426343.3A CN111071255B (en) | 2019-12-30 | 2019-12-30 | Overheating protection control method for dual-clutch automatic transmission |
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| CN201911426343.3A CN111071255B (en) | 2019-12-30 | 2019-12-30 | Overheating protection control method for dual-clutch automatic transmission |
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| CN111071255B true CN111071255B (en) | 2021-01-22 |
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| CN111532275B (en) * | 2020-06-22 | 2020-10-16 | 北京航空航天大学 | Protection control device and protection control method for wet-type gear shifting clutch |
| WO2022155849A1 (en) * | 2021-01-21 | 2022-07-28 | 浙江吉利控股集团有限公司 | Dual-clutch transmission overheating protection method and apparatus, and computer storage medium |
| CN114379530B (en) * | 2021-04-19 | 2024-04-02 | 长城汽车股份有限公司 | Overheat protection method and device for transfer case and terminal equipment |
| CN115163825A (en) * | 2022-06-28 | 2022-10-11 | 中国第一汽车股份有限公司 | Overheat protection method and device for wet type dual-clutch automatic transmission and electronic equipment |
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| EP2845778A1 (en) * | 2013-08-30 | 2015-03-11 | Schaeffler Technologies AG & Co. KG | Method and device for controlling a drive train of a motor vehicle |
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| CN1958364A (en) * | 2005-11-04 | 2007-05-09 | 丰田自动车株式会社 | Control device and control method for vehicle |
| CN102200187A (en) * | 2010-03-23 | 2011-09-28 | 爱信Ai株式会社 | Power transmission control apparatus for vehicle |
| CN103307263A (en) * | 2012-03-16 | 2013-09-18 | 通用汽车环球科技运作有限责任公司 | Dual-clutch transmission thermal management |
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Effective date of registration: 20210809 Address after: No. 666, Jili Avenue, Jingwei new town, economic and Technological Development Zone, Xi'an, Shaanxi 710299 Patentee after: Xi'an Jirun Automobile Manufacturing Co.,Ltd. Patentee after: GEELY AUTOMOBILE RESEARCH INSTITUTE (NINGBO) Co.,Ltd. Patentee after: ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. Address before: 315336 818 Binhai two road, Hangzhou Bay New District, Ningbo, Zhejiang Patentee before: GEELY AUTOMOBILE RESEARCH INSTITUTE (NINGBO) Co.,Ltd. Patentee before: ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. |
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