WO2022155849A1 - Dual-clutch transmission overheating protection method and apparatus, and computer storage medium - Google Patents

Dual-clutch transmission overheating protection method and apparatus, and computer storage medium Download PDF

Info

Publication number
WO2022155849A1
WO2022155849A1 PCT/CN2021/073105 CN2021073105W WO2022155849A1 WO 2022155849 A1 WO2022155849 A1 WO 2022155849A1 CN 2021073105 W CN2021073105 W CN 2021073105W WO 2022155849 A1 WO2022155849 A1 WO 2022155849A1
Authority
WO
WIPO (PCT)
Prior art keywords
target gear
clutch
gear
predicted temperature
dual
Prior art date
Application number
PCT/CN2021/073105
Other languages
French (fr)
Chinese (zh)
Inventor
杨志凌
董昭相
柳泉冰
Original Assignee
浙江吉利控股集团有限公司
吉利汽车研究院（宁波）有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 浙江吉利控股集团有限公司, 吉利汽车研究院（宁波）有限公司 filed Critical 浙江吉利控股集团有限公司
Priority to CN202180067053.3A priority Critical patent/CN116685787A/en
Priority to PCT/CN2021/073105 priority patent/WO2022155849A1/en
Publication of WO2022155849A1 publication Critical patent/WO2022155849A1/en

Links

Classifications

    • 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
    • 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
    • F16H61/16—Inhibiting or initiating shift during unfavourable conditions, e.g. preventing forward reverse shift at high vehicle speed, preventing engine over speed

Definitions

  • the invention relates to the technical field of dual-clutch automatic transmission control, in particular to a dual-clutch transmission thermal protection method and device, and a computer storage medium.
  • clutch control is one of its core key technologies. Whether it is a dry dual clutch transmission or a wet dual clutch transmission, the performance and life of the clutch are affected by the working characteristics, and temperature is one of the key factors affecting the working characteristics of the clutch.
  • the temperature rise of the clutch will affect the friction coefficient of the clutch, accelerate the wear of the clutch, and affect the driving performance such as the starting and shifting of the transmission; if the temperature of the clutch is higher than its limit capacity for a long time, it will cause the failure of the clutch and directly affect the reliability of the transmission. and vehicle safety.
  • the current dual-clutch transmission control logic will limit the engine torque, disable the gear of the shaft where the overheated clutch is located, and even open the clutch when the clutch temperature is too high to avoid overheating, but these thermal protections Strategy can seriously affect drivability.
  • the existing clutch thermal protection strategies such as limiting the engine torque, opening the clutch, etc.
  • the existing thermal protection strategies belong to the overheating of the clutch.
  • the overheating of the clutch has already caused a certain degree of damage to the hardware, and the clutch hardware cannot be protected to the greatest extent.
  • the purpose of the present invention is to provide a method and device for thermal protection of a dual clutch transmission, and a computer storage medium, so as to solve the problem of damage to the clutch caused by overheating of the clutch due to long-term slippage of the clutch.
  • a thermal protection method for a dual-clutch transmission comprising: obtaining a target gear according to a current vehicle speed and an accelerator pedal signal; obtaining a predicted temperature of the clutch after switching to the target gear; comparing the predicted temperature with a preset temperature limit; When the predicted temperature exceeds the preset temperature limit, set the previous gear of the target gear as the target gear; when the predicted temperature does not exceed the preset temperature limit, output the target gear requested by the driver as the final target gear.
  • the step before the step of obtaining the predicted temperature of the clutch after switching to the target gear, the step further includes: obtaining the accelerator opening, engine torque, engine speed and the current gear; and engine speed to determine whether the current shift mode is a non-power shift mode; if so, directly switch to the target gear; if not, execute the step: obtain the predicted temperature of the clutch after switching to the target gear.
  • the above-mentioned step of obtaining the predicted temperature rise for switching from the current gear to the target gear includes: obtaining the slippage duration and the load torque and rotational speed difference of the clutch in the process of switching to the target gear; Calculate the slippage work of the clutch according to the speed difference, load torque and slippage time.
  • the above-mentioned step of obtaining the predicted temperature rise for switching from the current gear to the target gear includes: calculating the predicted temperature rise according to the specific heat capacity of the clutch, the cooling capacity of the transmission and the slippage work.
  • the above-mentioned step of setting the previous gear of the target gear as the target gear when the predicted temperature exceeds the preset temperature limit includes: when the predicted temperature exceeds the preset temperature limit , to disable the target gear.
  • the step of outputting the target gear when the predicted temperature does not exceed the preset temperature limit includes: judging whether the target gear is disabled; if not, switching the vehicle gear to target gear; if so, switch the vehicle gear to the previous gear of the target gear.
  • the method for thermal protection of the dual clutch transmission further includes: if there is no gear whose predicted temperature does not exceed the preset temperature limit between the target gear and the current gear, performing a power interruption shift block.
  • the invention also provides a clutch thermal protection device, comprising: a shift sequence module, a temperature prediction module and an overheat protection module; the shift sequence module: obtains the target gear according to the current vehicle speed and the accelerator pedal signal; the temperature prediction module: obtains the switch to Predicted temperature of the clutch after the target gear; overheat protection module: when the predicted temperature of the clutch exceeds the preset temperature limit, the previous gear of the target gear is set as the target gear; when the predicted temperature of the clutch does not exceed the preset temperature limit When the value is set, the target gear requested by the driver is output as the final target gear.
  • the present invention also provides a computer storage medium, where computer program instructions are stored on the computer storage medium, and when the computer program instructions are executed by a processor, any one of the above-mentioned thermal protection methods for a dual clutch transmission is implemented.
  • the method and device for thermal protection of a dual clutch transmission, and a computer storage medium provided by the present invention obtain the target gear according to the current vehicle speed and the accelerator pedal signal; obtain the predicted temperature of the clutch after switching to the target gear; and then judge whether the clutch is overheated according to the predicted temperature
  • the gear shift is intervened and corrected, and the target gear with no risk of overheating of the clutch is finally output to the transmission control unit for execution.
  • FIG. 1 is a flow chart of a method for thermal protection of a dual clutch transmission according to the present invention.
  • FIG. 2 is a flow chart of a method for determining a shift demand according to the present invention.
  • FIG. 3 is a flowchart of a method for determining a shift mode according to the present invention.
  • FIG. 4 is a schematic block diagram of a thermal protection method for a dual clutch transmission according to the present invention.
  • FIG. 5 is a structural block diagram of the clutch thermal protection device shown in the present invention.
  • Fig. 1 is a flow chart of a method for thermal protection of a dual clutch transmission shown in the present invention
  • Fig. 2 is a flow chart of a method for judging shift demand according to the present invention
  • Fig. 3 is a flow chart of a method for judging shift mode shown in the present invention
  • Fig. 4 is a principle block diagram of the thermal protection method of the dual clutch transmission shown in the present invention.
  • the thermal protection method of the dual clutch transmission shown in the present invention includes the following steps:
  • Step S11 Obtain the target gear according to the current vehicle speed and the accelerator pedal signal.
  • the automatic shift controller can downshift the current gear to the target gear according to the driver's behavioral intention.
  • the clutch will slip and wear, which will generate a lot of heat, which may cause the clutch to overheat.
  • the heat generated can be quickly cooled by the transmission oil, so that the clutch temperature will not change too much.
  • the current gear is switched to the target gear as a downshift.
  • the present invention can also be applied to an upshift process.
  • the chassis controller sends the calculated current vehicle speed signal and the accelerator pedal signal to the vehicle controller, and the vehicle controller calculates the driver's required gear according to the vehicle accelerator and vehicle speed, and then sends the driver's The desired gear is set to the target gear.
  • FIG. 2 is a flowchart of a method for determining a shift demand according to the present invention.
  • step S12 obtaining the predicted temperature of the clutch after switching to the target gear, before including: judging whether the current shifting demand is a downshifting demand; if so, execute the step: obtaining after switching to the target gear the predicted clutch temperature; if not, shift directly to the target gear.
  • the up/down shift demand judgment is obtained by comparing the current gear with the target gear.
  • the target gear is greater than the current gear, it is an upshift; when the target gear is less than the current gear, it is a downshift; when the target gear is equal to the current gear, the current gear is kept working and does not enter the shift.
  • the vehicle controller After calculating the driver's required gear/target gear, the vehicle controller compares the target gear with the current gear. If the target gear is higher than the current gear (for example, the current gear is 3 and the target gear is 4), it is confirmed that the current shift demand is an upshift shift demand. If the target gear is lower than the current gear (for example, the current gear is 6 and the target gear is 2), it is confirmed that the current shifting demand is the shifting demand for downshifting.
  • shift demand is divided into two types: upshift demand and downshift demand.
  • FIG. 3 is a flowchart of a method for determining a shift mode according to the present invention.
  • step S12 obtaining the predicted temperature of the clutch after switching to the target gear, before further comprising: obtaining the accelerator opening, engine torque, engine speed and the current gear; according to the accelerator opening, engine torque and engine speed Determine whether the current shifting mode is a non-power shifting mode; if so, directly switch to the target gear; if not, execute the step: obtain the predicted temperature of the clutch after switching to the target gear.
  • the non-power shift mode is established if the accelerator opening is less than or equal to the preset opening, and the engine torque is less than or equal to the preset torque, and the engine speed is within the speed range of the current working gear. If the accelerator opening is greater than the preset opening, and the engine torque is greater than the preset torque, and the engine speed is within the speed range of the current working gear, it is in the power shift mode.
  • the preset opening degree and the preset torque are set according to the type of the vehicle, and different vehicles have different parameters in the actual process, which is not limited in the present invention.
  • the shifting mode is divided into a power shifting mode and a non-power shifting mode.
  • step S12 is performed: obtaining the switch Predicted clutch temperature after reaching the target gear.
  • Step S12 Obtain the predicted temperature of the clutch after switching to the target gear.
  • Fig. 4 is the principle block diagram of the thermal protection method of the dual clutch transmission shown in the present invention.
  • the overheating of the clutch is directly related to the heat resistance of the clutch hardware and the high temperature rise during downshifting.
  • the temperature rise of the clutch is mainly caused by the proportional integral of the clutch load torque and speed difference and the slippage time.
  • the slippage work that may be generated is evaluated to determine the execution Whether there are potential risks such as excessive clutch temperature and limited engine torque during the driver's request for a gear.
  • the transmission oil temperature is the clutch temperature. Therefore, the predicted temperature after the clutch is switched to the target gear can be obtained from the sum of the current oil temperature and the predicted temperature rise of switching to the target gear.
  • step S12 obtaining the predicted temperature of the clutch after switching to the target gear, including: obtaining the predicted temperature rise of switching from the current gear to the target gear; obtaining the predicted temperature according to the current temperature of the clutch and the predicted temperature rise .
  • the step of obtaining the predicted temperature rise for switching from the current gear to the target gear includes: obtaining the slippage duration and the load torque and rotational speed difference of the clutch in the process of switching to the target gear; The torque and slipping time are used to calculate the slipping work of the clutch.
  • the step of obtaining the predicted temperature rise for switching from the current gear to the target gear includes: calculating the predicted temperature rise according to the specific heat capacity of the clutch, the cooling capacity of the transmission and the slip work of the clutch.
  • transmission oil can be used to cool clutch friction plates and steel plates.
  • the level of oil temperature has a great influence on the cooling effect (the higher the oil temperature, the worse the cooling ability, and the lower the oil temperature, the better the cooling ability).
  • the transmission oil can be cooled by the oil cooler, and then circulated into the transmission to cool the clutch again.
  • the oil temperature is the temperature before entering the oil cooler.
  • the clutch will generate a lot of heat due to slipping during the working process.
  • the predicted temperature rise is the temperature that may rise after the heat generated by the clutch during the working process of the clutch minus the cooling capacity of the transmission oil, and the oil temperature plus the predicted temperature.
  • the rising value is the temperature that the clutch can reach in this working condition as the judgment condition for whether the clutch is overheated.
  • Step S13 Compare the predicted temperature with a preset temperature limit.
  • the clutch When the clutch temperature is greater than the preset temperature limit, the clutch overheats, which will cause damage to the clutch hardware; when the clutch temperature is less than or equal to the preset temperature limit, the clutch can work normally without causing damage to the clutch hardware.
  • the preset temperature limit value is set according to the clutch type of the vehicle, and different clutches have different parameters in the actual process, which is not limited in the present invention.
  • Step S14 when the predicted temperature exceeds the preset temperature limit, set the previous gear of the target gear as the target gear.
  • step S14 when the predicted temperature exceeds the preset temperature limit, setting the previous gear of the target gear as the target gear, including: when the predicted temperature exceeds the preset temperature limit, disabling the target gear.
  • the target gear is disabled when it is predicted that the temperature of the clutch will exceed a preset temperature limit after switching to the target gear. Then, the last gear of the target gear is set as the target gear of the second level, and it is continued to judge whether the temperature of the clutch switched to the target gear of the second level will exceed the preset temperature limit. If it exceeds, disable the second-level target gear, set the previous gear of the second-level target gear to the second-level target gear, and continue to judge until the clutch temperature switched to the target gear does not exceed The preset temperature limit is reached, or until the gear currently used by the vehicle is determined (that is, the target gear is the current gear).
  • Step S15 When the predicted temperature does not exceed the preset temperature limit, output the target gear requested by the driver as the final target gear.
  • the target gear is output to the shift controller for execution, so as to switch the current gear to the target gear.
  • Step S15 when the predicted temperature does not exceed the preset temperature limit, output the target gear requested by the driver as the final target gear, and then include: judging whether the target gear is disabled; if not, changing the vehicle gear Switch to the target gear; if so, switch the vehicle gear to the previous gear of the target gear.
  • the last gear of the target gear is a non-switchable gear (eg, the gear is the gear currently being used by the vehicle)
  • perform a power interruption shift Interrupt Shift
  • Interrupt Shift to make the vehicle change from the currently used gear Shifts into user-demanded gears without clutch temperature exceeding preset temperature limits.
  • the thermal protection method for the dual clutch transmission further includes: if there is no gear whose predicted temperature does not exceed a preset temperature limit between the target gear and the current gear, performing an Interrupt Shift (Interrupt Shift) , so that the vehicle shifts from the currently used gear to the user-required gear without the clutch temperature exceeding the preset temperature limit.
  • Interrupt Shift Interrupt Shift
  • the vehicle when there is no gear whose predicted temperature does not exceed the temperature limit (ie, there is no available gear) between the standard gear and the current gear, the vehicle is switched to a power-off gear.
  • the downshift is intervened and corrected before the clutch overheat occurs during the power downshift, and the clutch slippage work is predicted based on the clutch temperature and oil temperature.
  • the next-level target gear ie, the previous gear of the target gear
  • the clutch temperature can be prevented from exceeding the limit caused by long-term clutch slippage, effectively reducing the risk of overheating of the clutch, and protecting the clutch from thermal damage to the greatest extent. Abnormalities such as clutch disengagement will not affect the drivability of the vehicle.
  • the embodiment of the present invention optimizes the software logic, does not need to change the hardware material of the clutch, effectively reduces the cost and shortens the development cycle; and does not involve the change of the shift point, and does not affect the driving style of the whole vehicle. Dynamics and the driver's overall vehicle experience are not affected.
  • FIG. 5 is a block diagram of the clutch thermal protection device according to the present invention.
  • the invention also provides a clutch thermal protection device, comprising: a shift sequence module, a temperature prediction module and an overheat protection module; the shift sequence module: obtains the target gear according to the current vehicle speed and the accelerator pedal signal; the temperature prediction module: obtains the switch to Predicted temperature of the clutch after the target gear; overheat protection module: when the predicted temperature of the clutch exceeds the preset temperature limit, the previous gear of the target gear is set as the target gear; when the predicted temperature of the clutch does not exceed the preset temperature limit When the value is set, the driver's request target gear is output to the final target gear.
  • the clutch thermal protection device intervenes and corrects the downshift before the clutch overheat occurs during the power downshift process, and predicts the clutch slippage work according to the clutch temperature and oil temperature.
  • the next-level target gear ie, the previous gear of the target gear
  • the clutch temperature can be prevented from exceeding the limit caused by long-term clutch slippage, effectively reducing the risk of overheating of the clutch, and protecting the clutch from thermal damage to the greatest extent. Abnormalities such as clutch disengagement will not affect the drivability of the vehicle.
  • the present invention further includes a computer storage medium on which computer program instructions are stored; when the computer program instructions are executed by a processor, the data service management method according to any one of the embodiments of the present invention is implemented.
  • An embodiment of the present invention also provides a computer program product, the computer program product includes computer program code, when the computer program code is run on a computer, the computer is made to execute the method described in the various possible implementation manners above.
  • An embodiment of the present invention further provides a chip, including a memory and a processor, where the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that a chip installed with the chip is
  • the apparatus performs the method as described in the various possible embodiments above.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Transmission Device (AREA)

Abstract

A dual-clutch transmission overheating protection method. The method comprises: step S11: acquiring a target gear according to the current vehicle speed and an accelerator pedal signal; step S12: acquiring a predicted temperature of a clutch after switching to the target gear; step S13: comparing the predicted temperature with a preset temperature limit value; step S14: setting a previous gear of the target gear to be a target gear when the predicted temperature exceeds the preset temperature limit value; and step S15: outputting the target gear requested by a driver as a final target gear when the predicted temperature does not exceed the preset temperature limit value. According to the dual-clutch transmission overheating protection method, by pre-determining the risk of overheating of a clutch, when there is a potential risk of overheating, the power downshift timing is intervened and corrected, thereby effectively reducing the risk of overheating of the clutch, protecting the clutch from being damaged by heat to the maximum extent, avoiding situations such as engine torque limiting and clutch out, and not affecting vehicle attributes such as drivability. Also provided are a dual-clutch transmission overheating protection apparatus, and a computer storage medium storing the dual-clutch transmission overheating protection method.

Description

双离合器变速器热保护方法及装置、计算机存储介质Thermal protection method and device for dual clutch transmission, and computer storage medium 技术领域technical field
本发明涉及双离合器自动变速器控制技术领域，特别是涉及一种双离合器变速器热保护方法及装置、计算机存储介质。The invention relates to the technical field of dual-clutch automatic transmission control, in particular to a dual-clutch transmission thermal protection method and device, and a computer storage medium.
背景技术Background technique
对于双离合变速器而言，离合器控制是其核心的关键技术之一。无论是干式双离合器变速器还是湿式双离合器变速器，离合器的性能和寿命均受工作特性的影响，而温度正是影响离合器工作特性的关键因素之一。离合器温升会影响离合器的摩擦系数，加速离合器的磨损，影响变速器的起步、换档等驾驶性能；若离合器温度长时间高于其极限能力，则会引起离合器的失效，直接影响变速器的可靠性及车辆安全性。For dual-clutch transmission, clutch control is one of its core key technologies. Whether it is a dry dual clutch transmission or a wet dual clutch transmission, the performance and life of the clutch are affected by the working characteristics, and temperature is one of the key factors affecting the working characteristics of the clutch. The temperature rise of the clutch will affect the friction coefficient of the clutch, accelerate the wear of the clutch, and affect the driving performance such as the starting and shifting of the transmission; if the temperature of the clutch is higher than its limit capacity for a long time, it will cause the failure of the clutch and directly affect the reliability of the transmission. and vehicle safety.
当前双离合变速器控制逻辑为避免离合器硬件损伤，会在离合器温度过高的时采取对发动机限扭、禁用过热离合器所在轴的挡位，甚至过热时打开离合器等操作进行规避过热，但是这些热保护策略会严重影响到驾驶性。In order to avoid damage to the clutch hardware, the current dual-clutch transmission control logic will limit the engine torque, disable the gear of the shaft where the overheated clutch is located, and even open the clutch when the clutch temperature is too high to avoid overheating, but these thermal protections Strategy can seriously affect drivability.
技术问题technical problem
也就是说，现有的离合器热保护策略，例如对发动机限扭、离合器打开等，这类策略是以牺牲驾驶员的驾驶体验为代价的；而且，现有的热保护策略属于离合器过热时的后处理措施，离合器过热已经对硬件造成了一定程度的伤害，无法最大程度的保护离合器硬件。That is to say, the existing clutch thermal protection strategies, such as limiting the engine torque, opening the clutch, etc., are at the expense of the driver's driving experience; moreover, the existing thermal protection strategies belong to the overheating of the clutch. After-treatment measures, the overheating of the clutch has already caused a certain degree of damage to the hardware, and the clutch hardware cannot be protected to the greatest extent.
技术解决方案technical solutions
本发明的目的在于提供一种双离合器变速器热保护方法及装置、计算机存储介质，以解决离合器长时间滑磨而导致离合器温度过高对离合器造成损坏的问题。The purpose of the present invention is to provide a method and device for thermal protection of a dual clutch transmission, and a computer storage medium, so as to solve the problem of damage to the clutch caused by overheating of the clutch due to long-term slippage of the clutch.
一种双离合器变速器热保护方法，包括：根据当前车速和油门踏板信号获取目标挡位；获取切换至目标挡位后离合器的预测温度；将所述预测温度与预设温度限值进行对比；在预测温度超过预设温度限值时，将目标挡位的上一挡位设置为目标挡位；在预测温度未超过预设温度限值时，将驾驶员请求的目标档位输出为最终的目标挡位。A thermal protection method for a dual-clutch transmission, comprising: obtaining a target gear according to a current vehicle speed and an accelerator pedal signal; obtaining a predicted temperature of the clutch after switching to the target gear; comparing the predicted temperature with a preset temperature limit; When the predicted temperature exceeds the preset temperature limit, set the previous gear of the target gear as the target gear; when the predicted temperature does not exceed the preset temperature limit, output the target gear requested by the driver as the final target gear.
在本发明的较佳实施例中，上述获取切换至目标挡位后离合器的预测温度的步骤之前包括：判断当前换挡需求是否为降档换挡需求；若是，则执行步骤：获取切换至目标挡位后的离合器预测温度；若否，则直接切换至目标挡位。In a preferred embodiment of the present invention, before the step of obtaining the predicted temperature of the clutch after switching to the target gear, the step includes: judging whether the current shifting demand is a downshifting demand; Predicted clutch temperature after gear; if not, shift directly to target gear.
在本发明的较佳实施例中，上述获取切换至目标挡位后离合器的预测温度的步骤之前还包括：获取油门开度、发动机扭矩、发动机转速及当前挡位；根据油门开度、发动机扭矩及发动机转速判断当前换挡模式是否为非动力换挡模式；若是，则直接切换至目标挡位；若否，则执行步骤：获取切换至目标挡位后离合器的预测温度。In a preferred embodiment of the present invention, before the step of obtaining the predicted temperature of the clutch after switching to the target gear, the step further includes: obtaining the accelerator opening, engine torque, engine speed and the current gear; and engine speed to determine whether the current shift mode is a non-power shift mode; if so, directly switch to the target gear; if not, execute the step: obtain the predicted temperature of the clutch after switching to the target gear.
在本发明的较佳实施例中，上述获取切换至目标挡位后离合器的预测温度的步骤包括：获取由当前挡位切换至目标挡位的预测温升；根据离合器的当前温度和预测温升获取预测温度。In a preferred embodiment of the present invention, the above step of obtaining the predicted temperature of the clutch after switching to the target gear includes: obtaining the predicted temperature rise of switching from the current gear to the target gear; according to the current temperature of the clutch and the predicted temperature rise Get the predicted temperature.
在本发明的较佳实施例中，上述获取由当前挡位切换至目标挡位的预测温升的步骤包括：获取切换至目标挡位过程中的滑磨时长与离合器的加载扭矩和转速差；根据转速差、加载扭矩及滑磨时长计算离合器的滑磨功。In a preferred embodiment of the present invention, the above-mentioned step of obtaining the predicted temperature rise for switching from the current gear to the target gear includes: obtaining the slippage duration and the load torque and rotational speed difference of the clutch in the process of switching to the target gear; Calculate the slippage work of the clutch according to the speed difference, load torque and slippage time.
在本发明的较佳实施例中，上述获取由当前挡位切换至目标挡位的预测温升的步骤包括：根据离合器的比热容、变速器冷却能力及滑磨功计算预测温升。In a preferred embodiment of the present invention, the above-mentioned step of obtaining the predicted temperature rise for switching from the current gear to the target gear includes: calculating the predicted temperature rise according to the specific heat capacity of the clutch, the cooling capacity of the transmission and the slippage work.
在本发明的较佳实施例中，上述在预测温度超过预设温度限值时，将目标挡位的上一挡位设置为目标挡位的步骤包括：在预测温度超过预设温度限值时，禁用目标挡位。In a preferred embodiment of the present invention, the above-mentioned step of setting the previous gear of the target gear as the target gear when the predicted temperature exceeds the preset temperature limit includes: when the predicted temperature exceeds the preset temperature limit , to disable the target gear.
在本发明的较佳实施例中，上述在预测温度未超过预设温度限值时，输出目标挡位的步骤之后包括：判断目标挡位是否被禁用；若否，则将车辆挡位切换至目标挡位；若是，则将车辆挡位切换至目标挡位的上一挡位。In a preferred embodiment of the present invention, the step of outputting the target gear when the predicted temperature does not exceed the preset temperature limit includes: judging whether the target gear is disabled; if not, switching the vehicle gear to target gear; if so, switch the vehicle gear to the previous gear of the target gear.
在本发明的较佳实施例中，上述双离合器变速器热保护方法还包括：若目标挡位至当前挡位之间不存在预测温度未超过预设温度限值的挡位，则进行动力中断换挡。In a preferred embodiment of the present invention, the method for thermal protection of the dual clutch transmission further includes: if there is no gear whose predicted temperature does not exceed the preset temperature limit between the target gear and the current gear, performing a power interruption shift block.
本发明还提供一种离合器热保护装置，包括：换挡时序模块、温度预测模块和过热保护模块；换挡时序模块：根据当前车速和油门踏板信号获取目标挡位；温度预测模块：获取切换至目标挡位后的离合器预测温度；过热保护模块：在离合器预测温度超过预设温度限值时，将目标挡位的上一挡位设置为目标挡位；在离合器预测温度未超过预设温度限值时，将驾驶员请求的目标档位输出为最终的目标档位。The invention also provides a clutch thermal protection device, comprising: a shift sequence module, a temperature prediction module and an overheat protection module; the shift sequence module: obtains the target gear according to the current vehicle speed and the accelerator pedal signal; the temperature prediction module: obtains the switch to Predicted temperature of the clutch after the target gear; overheat protection module: when the predicted temperature of the clutch exceeds the preset temperature limit, the previous gear of the target gear is set as the target gear; when the predicted temperature of the clutch does not exceed the preset temperature limit When the value is set, the target gear requested by the driver is output as the final target gear.
本发明还提供一种计算机存储介质，计算机存储介质上存储有计算机程序指令，计算机程序指令被处理器执行时，实现上述中任一所述的双离合器变速器热保护方法。The present invention also provides a computer storage medium, where computer program instructions are stored on the computer storage medium, and when the computer program instructions are executed by a processor, any one of the above-mentioned thermal protection methods for a dual clutch transmission is implemented.
有益效果beneficial effect
本发明提供的双离合器变速器热保护方法及装置、计算机存储介质，根据当前车速和油门踏板信号获取目标挡位；获取切换至目标挡位后离合器的预测温度；然后根据预测温度判断离合器是否存在过热风险，存在过热风险时对切换挡位进行干预和修正，最终输出离合器无过热风险的目标档位至变速器控制单元进行执行。在无可用挡位时，更换换挡模式至非动力换挡模式，进行换挡。有效的降低离合器过热的风险，最大程度保护离合器不受热伤害，而且不会出现发动机限扭和离合器打开等情况，不影响驾驶员的驾驶体验及整车的动力降档性能，并且不受硬件材料限制、不局限于离合器硬件特性，降低了硬件开发成本及整车成本。The method and device for thermal protection of a dual clutch transmission, and a computer storage medium provided by the present invention obtain the target gear according to the current vehicle speed and the accelerator pedal signal; obtain the predicted temperature of the clutch after switching to the target gear; and then judge whether the clutch is overheated according to the predicted temperature When there is a risk of overheating, the gear shift is intervened and corrected, and the target gear with no risk of overheating of the clutch is finally output to the transmission control unit for execution. When there is no available gear, change the shift mode to a non-power shift mode and perform a shift. Effectively reduce the risk of overheating of the clutch, protect the clutch from thermal damage to the greatest extent, and there will be no engine torque limit and clutch opening, which will not affect the driver's driving experience and the power downshift performance of the vehicle, and is not affected by hardware materials. Restrictions, not limited to clutch hardware characteristics, reduce hardware development costs and vehicle costs.
附图说明Description of drawings
图1是本发明示出的双离合器变速器热保护方法的流程图。FIG. 1 is a flow chart of a method for thermal protection of a dual clutch transmission according to the present invention.
图2是本发明示出的换挡需求判断方法的流程图。FIG. 2 is a flow chart of a method for determining a shift demand according to the present invention.
图3是本发明示出的换挡模式判断方法的流程图。FIG. 3 is a flowchart of a method for determining a shift mode according to the present invention.
图4是本发明示出的双离合器变速器热保护方法的原理框图。FIG. 4 is a schematic block diagram of a thermal protection method for a dual clutch transmission according to the present invention.
图5是本发明示出的离合器热保护装置的结构框图。FIG. 5 is a structural block diagram of the clutch thermal protection device shown in the present invention.
本发明的实施方式Embodiments of the present invention
下面结合附图和实施例，详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本申请相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本申请的一些方面相一致的装置和方法的例子。Exemplary embodiments are described in detail below with reference to the accompanying drawings and embodiments, examples of which are shown in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as recited in the appended claims.
本发明的说明书和权利要求书中的术语“第一”、“第二”、“第三”、“第四”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。The terms "first", "second", "third", "fourth", etc. in the description and claims of the present invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. .
图1是本发明示出的双离合器变速器热保护方法的流程图；图2是本发明示出的换挡需求判断方法的流程图；图3是本发明示出的换挡模式判断方法的流程图；图4是本发明示出的双离合器变速器热保护方法的原理框图。Fig. 1 is a flow chart of a method for thermal protection of a dual clutch transmission shown in the present invention; Fig. 2 is a flow chart of a method for judging shift demand according to the present invention; Fig. 3 is a flow chart of a method for judging shift mode shown in the present invention Fig. 4 is a principle block diagram of the thermal protection method of the dual clutch transmission shown in the present invention.
下面结合图1至图4对本发明实施方式双离合器变速器热保护方法进行说明：The thermal protection method of the dual clutch transmission according to the embodiment of the present invention will be described below with reference to FIGS. 1 to 4 :
请参阅图1和图4，如图1所示本发明示出的双离合器变速器热保护方法，包括以下步骤：Please refer to FIG. 1 and FIG. 4. As shown in FIG. 1, the thermal protection method of the dual clutch transmission shown in the present invention includes the following steps:
步骤S11：根据当前车速和油门踏板信号获取目标挡位。Step S11: Obtain the target gear according to the current vehicle speed and the accelerator pedal signal.
需要说明的是，本发明主要用于在降档过程中，自动换挡控制器可根据驾驶员行为意图将当前挡位降档为目标挡位。降档过程中，离合器会产生滑磨，会产生大量的热量，可能导致离合器过热；而升档过程中，产生的热量可以被变速器油迅速冷却，使得离合器温度不会发生太大的变化。下面说明中，以当前挡位切换至目标挡位为降档进行说明。当然，本发明也可以应用于升档过程。It should be noted that the present invention is mainly used in the downshift process, the automatic shift controller can downshift the current gear to the target gear according to the driver's behavioral intention. During downshifting, the clutch will slip and wear, which will generate a lot of heat, which may cause the clutch to overheat. During the upshifting process, the heat generated can be quickly cooled by the transmission oil, so that the clutch temperature will not change too much. In the following description, the current gear is switched to the target gear as a downshift. Of course, the present invention can also be applied to an upshift process.
具体地，底盘控制器将计算出的当前车速信号及油门踏板信号发送到整车控制器，整车控制器根据整车油门和车速计算出驾驶员的需求挡位，然后将所述驾驶员的需求挡位设置为目标挡位。Specifically, the chassis controller sends the calculated current vehicle speed signal and the accelerator pedal signal to the vehicle controller, and the vehicle controller calculates the driver's required gear according to the vehicle accelerator and vehicle speed, and then sends the driver's The desired gear is set to the target gear.
请参阅图2，图2是本发明示出的换挡需求判断方法的流程图。Please refer to FIG. 2 . FIG. 2 is a flowchart of a method for determining a shift demand according to the present invention.
在一实施方式中，步骤S12：获取切换至目标挡位后离合器的预测温度，之前包括：判断当前换挡需求是否为降档换挡需求；若是，则执行步骤：获取切换至目标挡位后的离合器预测温度；若否，则直接切换至目标挡位。In one embodiment, step S12: obtaining the predicted temperature of the clutch after switching to the target gear, before including: judging whether the current shifting demand is a downshifting demand; if so, execute the step: obtaining after switching to the target gear the predicted clutch temperature; if not, shift directly to the target gear.
具体地，升/降挡需求判断是通过将当前挡位和目标挡位进行比较获得。当目标挡位大于当前挡位，则为升挡；当目标挡位小于当前挡位，则为降挡；当目标挡位等于当前挡位，则保持当前挡位工作，不进入换挡。Specifically, the up/down shift demand judgment is obtained by comparing the current gear with the target gear. When the target gear is greater than the current gear, it is an upshift; when the target gear is less than the current gear, it is a downshift; when the target gear is equal to the current gear, the current gear is kept working and does not enter the shift.
整车控制器在计算出驾驶员的需求挡位/目标挡位后，将目标挡位与当前挡位进行比对。若目标挡位比当前挡位高（如当前挡位为3，目标挡位为4）时，则确认当前换挡需求为升档换挡需求。若目标挡位比当前挡位低（如当前挡位为6，目标挡位为2）时，则确认当前换挡需求为将降档换挡需求。After calculating the driver's required gear/target gear, the vehicle controller compares the target gear with the current gear. If the target gear is higher than the current gear (for example, the current gear is 3 and the target gear is 4), it is confirmed that the current shift demand is an upshift shift demand. If the target gear is lower than the current gear (for example, the current gear is 6 and the target gear is 2), it is confirmed that the current shifting demand is the shifting demand for downshifting.
易于理解的是，换挡需求分为升挡需求和降挡需求两种。It is easy to understand that the shift demand is divided into two types: upshift demand and downshift demand.
请参阅图3，图3是本发明示出的换挡模式判断方法的流程图。Please refer to FIG. 3 . FIG. 3 is a flowchart of a method for determining a shift mode according to the present invention.
在一实施方式中，步骤S12：获取切换至目标挡位后离合器的预测温度，之前还包括：获取油门开度、发动机扭矩、发动机转速及当前挡位；根据油门开度、发动机扭矩及发动机转速判断当前换挡模式是否为非动力换挡模式；若是，则直接切换至目标挡位；若否，则执行步骤：获取切换至目标挡位后离合器的预测温度。In one embodiment, step S12: obtaining the predicted temperature of the clutch after switching to the target gear, before further comprising: obtaining the accelerator opening, engine torque, engine speed and the current gear; according to the accelerator opening, engine torque and engine speed Determine whether the current shifting mode is a non-power shifting mode; if so, directly switch to the target gear; if not, execute the step: obtain the predicted temperature of the clutch after switching to the target gear.
具体地，若油门开度小于或等于预设开度，且发动机扭矩小于或等于预设扭矩，且发动机转速在当前工作挡位的转速范围内时，则为非动力换挡模式。若油门开度大于预设开度，且发动机扭矩大于预设扭矩，且发动机转速在当前工作挡位转速范围内，则为动力换挡模式。所述预设开度及所述预设扭矩根据所述车辆的类型进行设置，实际过程中不同的车辆具有不同的参数，本发明对此不加以限制。Specifically, if the accelerator opening is less than or equal to the preset opening, and the engine torque is less than or equal to the preset torque, and the engine speed is within the speed range of the current working gear, the non-power shift mode is established. If the accelerator opening is greater than the preset opening, and the engine torque is greater than the preset torque, and the engine speed is within the speed range of the current working gear, it is in the power shift mode. The preset opening degree and the preset torque are set according to the type of the vehicle, and different vehicles have different parameters in the actual process, which is not limited in the present invention.
易于理解的是，换挡模式分为动力换挡模式和非动力换挡模式两种。It is easy to understand that the shifting mode is divided into a power shifting mode and a non-power shifting mode.
在一实施方式中，在确认车辆当前的换挡模式为动力换挡模式后，还需要对车辆的换挡需求进行判断，在换挡需求为降档换挡需求时，执行步骤S12：获取切换至目标挡位后离合器的预测温度。具体实施方式请参考上述说明，不在此再次叙述。In one embodiment, after confirming that the current shift mode of the vehicle is the power shift mode, it is also necessary to determine the shift demand of the vehicle, and when the shift demand is a downshift shift demand, step S12 is performed: obtaining the switch Predicted clutch temperature after reaching the target gear. For specific embodiments, please refer to the above description, which will not be described again here.
步骤S12：获取切换至目标挡位后离合器的预测温度。Step S12: Obtain the predicted temperature of the clutch after switching to the target gear.
请参阅图4，图4是本发明示出的双离合器变速器热保护方法的原理框图.Please refer to Fig. 4, Fig. 4 is the principle block diagram of the thermal protection method of the dual clutch transmission shown in the present invention.
离合器过热与离合器硬件的耐热程度、以及降档过程中温升过高有直接关系，离合器温升主要由于离合器加载扭矩和转速差与滑磨时间正比例积分导致。The overheating of the clutch is directly related to the heat resistance of the clutch hardware and the high temperature rise during downshifting. The temperature rise of the clutch is mainly caused by the proportional integral of the clutch load torque and speed difference and the slippage time.
具体地，根据变速器当前的变速器油温，降档过程中在档滑磨的时间长短、离合器加载扭矩、发动机与离合器的转速差等相关信息，对可能产生的滑磨功进行评估，以判断执行驾驶员需求档位的过程中是否会出现离合器温度过高、发动机扭矩受限等潜在风险。Specifically, according to the current transmission oil temperature of the transmission, the duration of gear slippage during the downshift process, the clutch loading torque, the speed difference between the engine and the clutch and other relevant information, the slippage work that may be generated is evaluated to determine the execution Whether there are potential risks such as excessive clutch temperature and limited engine torque during the driver's request for a gear.
一般情况下，变速器油温就是离合器温度。因此，可以通过当前油温与切换至目标挡位的预测温升之和得到离合器切换至目标挡位后的预测温度。Normally, the transmission oil temperature is the clutch temperature. Therefore, the predicted temperature after the clutch is switched to the target gear can be obtained from the sum of the current oil temperature and the predicted temperature rise of switching to the target gear.
在一实施方式中，步骤S12：获取切换至目标挡位后离合器的预测温度，包括：获取由当前挡位切换至目标挡位的预测温升；根据离合器的当前温度和预测温升获取预测温度。In one embodiment, step S12: obtaining the predicted temperature of the clutch after switching to the target gear, including: obtaining the predicted temperature rise of switching from the current gear to the target gear; obtaining the predicted temperature according to the current temperature of the clutch and the predicted temperature rise .
在一实施方式中，获取由当前挡位切换至目标挡位的预测温升的步骤包括：获取切换至目标挡位过程中的滑磨时长与离合器的加载扭矩和转速差；根据转速差、加载扭矩及滑磨时长计算离合器的滑磨功。In one embodiment, the step of obtaining the predicted temperature rise for switching from the current gear to the target gear includes: obtaining the slippage duration and the load torque and rotational speed difference of the clutch in the process of switching to the target gear; The torque and slipping time are used to calculate the slipping work of the clutch.
在一实施方式中，获取由当前挡位切换至目标挡位的预测温升的步骤包括：根据离合器的比热容、变速器冷却能力及离合器的滑磨功计算预测温升。In one embodiment, the step of obtaining the predicted temperature rise for switching from the current gear to the target gear includes: calculating the predicted temperature rise according to the specific heat capacity of the clutch, the cooling capacity of the transmission and the slip work of the clutch.
具体地，变速器油可以用来对离合器摩擦片、钢片进行冷却的，油温的高低对冷却效果有很大的影响（油温越高冷却能力越差，油温越低冷却能力越好）。变速器油可以经过油冷器进行冷却，然后循环到变速器内再次对离合器进行冷却，油温是进入油冷器前的温度。Specifically, transmission oil can be used to cool clutch friction plates and steel plates. The level of oil temperature has a great influence on the cooling effect (the higher the oil temperature, the worse the cooling ability, and the lower the oil temperature, the better the cooling ability). . The transmission oil can be cooled by the oil cooler, and then circulated into the transmission to cool the clutch again. The oil temperature is the temperature before entering the oil cooler.
具体地，离合器在工作过程中因滑磨会产生大量的热量，预测温升就是离合器工作过程中离合器的产热量减去变速器油的冷却能力后的可能升高的温度，油温加上预测温升的值即离合器在该工况能达到的温度作为离合器是否过热的判断条件。Specifically, the clutch will generate a lot of heat due to slipping during the working process. The predicted temperature rise is the temperature that may rise after the heat generated by the clutch during the working process of the clutch minus the cooling capacity of the transmission oil, and the oil temperature plus the predicted temperature. The rising value is the temperature that the clutch can reach in this working condition as the judgment condition for whether the clutch is overheated.
步骤S13：将所述预测温度与预设温度限值进行对比。Step S13: Compare the predicted temperature with a preset temperature limit.
离合器温度大于预设温度限值时，离合器过热，会对离合器硬件造成损害；离合器温度小于或等于预设温度限值时，离合器可正常工作，不会对离合器硬件造成损害。When the clutch temperature is greater than the preset temperature limit, the clutch overheats, which will cause damage to the clutch hardware; when the clutch temperature is less than or equal to the preset temperature limit, the clutch can work normally without causing damage to the clutch hardware.
需要说明的是，所述预设温度限值根据车辆的离合器类型进行设置，实际过程中不同的离合器具有不同的参数，本发明对此不加以限制。It should be noted that the preset temperature limit value is set according to the clutch type of the vehicle, and different clutches have different parameters in the actual process, which is not limited in the present invention.
步骤S14：在预测温度超过预设温度限值时，将目标挡位的上一挡位设置为目标挡位。Step S14: when the predicted temperature exceeds the preset temperature limit, set the previous gear of the target gear as the target gear.
在一实施方式中，步骤S14：在预测温度超过预设温度限值时，将目标挡位的上一挡位设置为目标挡位，包括：在预测温度超过预设温度限值时，禁用目标挡位。In one embodiment, step S14: when the predicted temperature exceeds the preset temperature limit, setting the previous gear of the target gear as the target gear, including: when the predicted temperature exceeds the preset temperature limit, disabling the target gear.
具体地，预测到切换至目标挡位后离合器的温度会超过预设温度限值时，禁用目标挡位。然后将目标挡位的上一挡位设置为次一级的目标挡位，并继续判断切换至次一级的目标挡位离合器的温度是否会超过预设温度限值。若超过，则禁用次一级目标挡位，将次一级目标挡位的上一挡位设置为次两级的目标挡位，并继续进行判断，直到切换至目标挡位的离合器温度不超过预设温度限值为止，或直到判断到车辆当前使用的挡位为止（即目标挡位为当前挡位）。Specifically, the target gear is disabled when it is predicted that the temperature of the clutch will exceed a preset temperature limit after switching to the target gear. Then, the last gear of the target gear is set as the target gear of the second level, and it is continued to judge whether the temperature of the clutch switched to the target gear of the second level will exceed the preset temperature limit. If it exceeds, disable the second-level target gear, set the previous gear of the second-level target gear to the second-level target gear, and continue to judge until the clutch temperature switched to the target gear does not exceed The preset temperature limit is reached, or until the gear currently used by the vehicle is determined (that is, the target gear is the current gear).
步骤S15：在预测温度未超过预设温度限值时，将驾驶员请求的目标档位输出为最终的目标挡位。Step S15: When the predicted temperature does not exceed the preset temperature limit, output the target gear requested by the driver as the final target gear.
具体地，输出目标挡位至换挡控制器进行执行，以将当前挡位切换至目标挡位。Specifically, the target gear is output to the shift controller for execution, so as to switch the current gear to the target gear.
步骤S15：在预测温度未超过预设温度限值时，将驾驶员请求的目标档位输出为最终的目标挡位，之后包括：判断目标挡位是否被禁用；若否，则将车辆挡位切换至目标挡位；若是，则将车辆挡位切换至目标挡位的上一挡位。Step S15: when the predicted temperature does not exceed the preset temperature limit, output the target gear requested by the driver as the final target gear, and then include: judging whether the target gear is disabled; if not, changing the vehicle gear Switch to the target gear; if so, switch the vehicle gear to the previous gear of the target gear.
具体地，若目标挡位的上一挡位为不可切换挡位（如，该挡位为车辆当前正在使用挡位），进行动力中断换挡（Interrupt Shift），以使车辆由当前使用挡位换挡至用户需求挡位，而离合器温度不会超过预设温度限值。Specifically, if the last gear of the target gear is a non-switchable gear (eg, the gear is the gear currently being used by the vehicle), perform a power interruption shift (Interrupt Shift) to make the vehicle change from the currently used gear Shifts into user-demanded gears without clutch temperature exceeding preset temperature limits.
在一实施方式中，双离合器变速器热保护方法还包括：若目标挡位至当前挡位之间不存在预测温度未超过预设温度限值的挡位，则进行动力中断换挡（Interrupt Shift），以使车辆由当前使用挡位换挡至用户需求挡位，而离合器温度不会超过预设温度限值。In one embodiment, the thermal protection method for the dual clutch transmission further includes: if there is no gear whose predicted temperature does not exceed a preset temperature limit between the target gear and the current gear, performing an Interrupt Shift (Interrupt Shift) , so that the vehicle shifts from the currently used gear to the user-required gear without the clutch temperature exceeding the preset temperature limit.
具体地，标挡位至当前挡位之间不存在预测温度未超过温度限值的挡位（即无可用挡位）时，将车辆切换为动力中断换挡。Specifically, when there is no gear whose predicted temperature does not exceed the temperature limit (ie, there is no available gear) between the standard gear and the current gear, the vehicle is switched to a power-off gear.
本发明实施例提供的双离合器变速器热保护方法，在动力降档过程中出现离合器过热前对降档进行干预和修正，通过离合器温度和油温的高低进行离合器滑磨功的预判。在离合器存在过热风险时，输出无过热风险的次一级目标挡位（即目标挡位的上一挡位）。通过减少降档过程中的在档滑磨的时间避免离合器长时间滑磨导致的离合器温度超过限值，有效的降低离合器过热的风险，最大程度保护离合器不受热伤害，不会出现发动机限扭和离合器脱开等异常，不会影响整车驾驶性。而且，本发明实施例针对软件逻辑进行优化，不需要对离合器硬件材料进行改变，有效的降低成本、缩短开发周期；并且不涉及换挡点的变更，不会影响整车的驾驶风格，整车动力性和驾驶员的整车体验不受影响。In the thermal protection method for a dual clutch transmission provided by the embodiment of the present invention, the downshift is intervened and corrected before the clutch overheat occurs during the power downshift, and the clutch slippage work is predicted based on the clutch temperature and oil temperature. When there is a risk of overheating of the clutch, the next-level target gear (ie, the previous gear of the target gear) with no risk of overheating is output. By reducing the time of on-gear slippage during downshifting, the clutch temperature can be prevented from exceeding the limit caused by long-term clutch slippage, effectively reducing the risk of overheating of the clutch, and protecting the clutch from thermal damage to the greatest extent. Abnormalities such as clutch disengagement will not affect the drivability of the vehicle. Moreover, the embodiment of the present invention optimizes the software logic, does not need to change the hardware material of the clutch, effectively reduces the cost and shortens the development cycle; and does not involve the change of the shift point, and does not affect the driving style of the whole vehicle. Dynamics and the driver's overall vehicle experience are not affected.
请参阅图5，图5为本发明示出的离合器热保护装置的模块框图。Please refer to FIG. 5 . FIG. 5 is a block diagram of the clutch thermal protection device according to the present invention.
本发明还提供一种离合器热保护装置，包括：换挡时序模块、温度预测模块和过热保护模块；换挡时序模块：根据当前车速和油门踏板信号获取目标挡位；温度预测模块：获取切换至目标挡位后的离合器预测温度；过热保护模块：在离合器预测温度超过预设温度限值时，将目标挡位的上一挡位设置为目标挡位；在离合器预测温度未超过预设温度限值时，将驾驶员请求目标挡位输出最终的目标挡位。The invention also provides a clutch thermal protection device, comprising: a shift sequence module, a temperature prediction module and an overheat protection module; the shift sequence module: obtains the target gear according to the current vehicle speed and the accelerator pedal signal; the temperature prediction module: obtains the switch to Predicted temperature of the clutch after the target gear; overheat protection module: when the predicted temperature of the clutch exceeds the preset temperature limit, the previous gear of the target gear is set as the target gear; when the predicted temperature of the clutch does not exceed the preset temperature limit When the value is set, the driver's request target gear is output to the final target gear.
本发明实施例提供的离合器热保护装置，在动力降档过程中出现离合器过热前对降档进行干预和修正，通过离合器温度和油温的高低进行离合器滑磨功的预判。在离合器存在过热风险时，输出无过热风险的次一级目标挡位（即目标挡位的上一挡位）。通过减少降档过程中的在档滑磨的时间避免离合器长时间滑磨导致的离合器温度超过限值，有效的降低离合器过热的风险，最大程度保护离合器不受热伤害，不会出现发动机限扭和离合器脱开等异常，不会影响整车驾驶性。而且，不需要对离合器硬件材料进行改变，有效的降低成本、缩短开发周期；并且不涉及换挡点的变更，不会影响整车的驾驶风格，整车动力性和驾驶员的整车体验不受影响。The clutch thermal protection device provided by the embodiment of the present invention intervenes and corrects the downshift before the clutch overheat occurs during the power downshift process, and predicts the clutch slippage work according to the clutch temperature and oil temperature. When there is a risk of overheating of the clutch, the next-level target gear (ie, the previous gear of the target gear) with no risk of overheating is output. By reducing the time of on-gear slippage during downshifting, the clutch temperature can be prevented from exceeding the limit caused by long-term clutch slippage, effectively reducing the risk of overheating of the clutch, and protecting the clutch from thermal damage to the greatest extent. Abnormalities such as clutch disengagement will not affect the drivability of the vehicle. Moreover, there is no need to change the hardware materials of the clutch, which effectively reduces the cost and shortens the development cycle; and does not involve the change of the shift point, it will not affect the driving style of the vehicle, and the power of the vehicle and the driver's vehicle experience will not be affected. Affected.
本发明还包括一种计算机存储介质，所述计算机存储介质上存储有计算机程序指令；所述计算机程序指令被处理器执行时实现如本发明实施方式中任一所述的数据业务管理方法。The present invention further includes a computer storage medium on which computer program instructions are stored; when the computer program instructions are executed by a processor, the data service management method according to any one of the embodiments of the present invention is implemented.
本发明实施例还提供一种计算机程序产品，所述计算机程序产品包括计算机程序代码，当所述计算机程序代码在计算机上运行时，使得计算机执行如上各种可能的实施方式中所述的方法。An embodiment of the present invention also provides a computer program product, the computer program product includes computer program code, when the computer program code is run on a computer, the computer is made to execute the method described in the various possible implementation manners above.
本发明实施例还提供一种芯片，包括存储器和处理器，所述存储器用于存储计算机程序，所述处理器用于从所述存储器中调用并运行所述计算机程序，使得安装有所述芯片的设备执行如上各种可能的实施方式中所述的方法。An embodiment of the present invention further provides a chip, including a memory and a processor, where the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that a chip installed with the chip is The apparatus performs the method as described in the various possible embodiments above.
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (11)

  1. 一种双离合器变速器热保护方法，其特征在于，所述双离合器变速器热保护方法包括：A thermal protection method for a dual clutch transmission, characterized in that the thermal protection method for the dual clutch transmission comprises:
    根据当前车速和油门踏板信号获取目标挡位；Obtain the target gear according to the current vehicle speed and accelerator pedal signal;
    获取切换至所述目标挡位后离合器的预测温度；obtaining the predicted temperature of the clutch after shifting to the target gear;
    将所述预测温度与预设温度限值进行对比；comparing the predicted temperature to a preset temperature limit;
    在所述预测温度超过所述预设温度限值时，将所述目标挡位的上一计算目标挡位设置为目标挡位；when the predicted temperature exceeds the preset temperature limit, setting the last calculated target gear of the target gear as the target gear;
    在所述预测温度未超过所述预设温度限值时，将驾驶员请求的目标档位输出为最终的目标档位。When the predicted temperature does not exceed the preset temperature limit, the target gear requested by the driver is output as the final target gear.
  2. 根据权利要求1所述的双离合器变速器热保护方法，其特征在于，获取切换至所述目标挡位后离合器的预测温度的步骤之前包括：The thermal protection method for a dual clutch transmission according to claim 1, wherein before the step of acquiring the predicted temperature of the clutch after switching to the target gear, the method comprises:
    判断当前换挡需求是否为降档换挡需求；Determine whether the current shift demand is a downshift shift demand;
    若是，则执行步骤：获取切换至所述目标挡位后的离合器预测温度；If so, perform the steps of: obtaining the predicted temperature of the clutch after switching to the target gear;
    若否，则直接切换至所述目标挡位。If not, directly switch to the target gear.
  3. 根据权利要求1所述的双离合器变速器热保护方法，其特征在于，获取切换至所述目标挡位后离合器的预测温度的步骤之前还包括：The thermal protection method for a dual clutch transmission according to claim 1, wherein before the step of acquiring the predicted temperature of the clutch after switching to the target gear, the method further comprises:
    获取油门开度、发动机扭矩、发动机转速及当前挡位；Get the accelerator opening, engine torque, engine speed and current gear;
    根据所述油门开度、所述发动机扭矩及所述发动机转速判断当前换挡模式是否为非动力换挡模式；Determine whether the current shift mode is a non-power shift mode according to the accelerator opening, the engine torque and the engine speed;
    若是，则直接切换至所述目标挡位；If so, directly switch to the target gear;
    若否，则执行步骤：获取切换至所述目标挡位后离合器的预测温度。If not, execute the step of acquiring the predicted temperature of the clutch after switching to the target gear.
  4. 根据权利要求1所述的双离合器变速器热保护方法，其特征在于，获取切换至所述目标挡位后离合器的预测温度的步骤包括：The thermal protection method for a dual clutch transmission according to claim 1, wherein the step of acquiring the predicted temperature of the clutch after switching to the target gear comprises:
    获取由当前挡位切换至所述目标挡位的预测温升；Obtain the predicted temperature rise of switching from the current gear to the target gear;
    根据所述离合器的当前温度和所述预测温升获取所述预测温度。The predicted temperature is obtained from the current temperature of the clutch and the predicted temperature rise.
  5. 根据权利要求4所述的双离合器变速器热保护方法，其特征在于，获取由当前挡位切换至所述目标挡位的预测温升的步骤包括：The thermal protection method for a dual clutch transmission according to claim 4, wherein the step of acquiring the predicted temperature rise for switching from the current gear to the target gear comprises:
    获取切换至所述目标挡位过程中的滑磨时长与离合器的加载扭矩和转速差；Obtain the slippage duration and the load torque and speed difference of the clutch in the process of switching to the target gear;
    根据所述转速差、所述加载扭矩及所述滑磨时长计算所述离合器的滑磨功。The slippage work of the clutch is calculated according to the rotational speed difference, the loading torque and the slippage duration.
  6. 根据权利要求5所述的双离合器变速器热保护方法，其特征在于，获取由当前挡位切换至所述目标挡位的预测温升的步骤包括：The thermal protection method for a dual clutch transmission according to claim 5, wherein the step of acquiring the predicted temperature rise for switching from the current gear to the target gear comprises:
    根据所述离合器的比热容、变速器冷却能力及所述滑磨功计算所述预测温升。The predicted temperature rise is calculated based on the specific heat capacity of the clutch, transmission cooling capacity, and the slip work.
  7. 根据权利要求1所述的双离合器变速器热保护方法，其特征在于，在所述预测温度超过预设温度限值时，将所述目标挡位的上一目标挡位设置为目标挡位的步骤包括：The thermal protection method for a dual clutch transmission according to claim 1, wherein when the predicted temperature exceeds a preset temperature limit, the step of setting the last target gear of the target gear as the target gear include:
    在所述预测温度超过所述预设温度限值时，禁用所述目标挡位。The target gear is disabled when the predicted temperature exceeds the preset temperature limit.
  8. 根据权利要求1所述的双离合器变速器热保护方法，其特征在于，在所述预测温度未超过所述预设温度限值时，将驾驶员请求的目标档位输出为最终的目标档位的步骤之后包括：The thermal protection method for a dual-clutch transmission according to claim 1, wherein when the predicted temperature does not exceed the preset temperature limit, the target gear requested by the driver is output as the final target gear The steps are followed by:
    判断所述目标挡位是否被禁用；determining whether the target gear is disabled;
    若否，则将车辆挡位切换至所述目标挡位；If not, switch the vehicle gear to the target gear;
    若是，则将所述车辆挡位切换至所述目标挡位的上一挡位。If so, switch the vehicle gear to the previous gear of the target gear.
  9. 根据权利要求1所述的双离合器变速器热保护方法，其特征在于，所述双离合器变速器热保护方法还包括：The thermal protection method for a dual clutch transmission according to claim 1, wherein the thermal protection method for the dual clutch transmission further comprises:
    若所述目标挡位至当前挡位之间不存在所述预测温度未超过所述温度限值的挡位，则进行动力中断换挡。If there is no gear in which the predicted temperature does not exceed the temperature limit between the target gear and the current gear, a power-off shift is performed.
  10. 一种双离合器变速器热保护装置，其特征在于，包括：换挡时序模块、温度预测模块和过热保护模块；A thermal protection device for a dual-clutch transmission, comprising: a shift sequence module, a temperature prediction module and an overheat protection module;
    换挡时序模块：根据当前车速和油门踏板信号获取目标挡位；Shift timing module: obtain the target gear according to the current vehicle speed and accelerator pedal signal;
    温度预测模块：获取切换至所述目标挡位后的离合器的预测温度；Temperature prediction module: obtains the predicted temperature of the clutch after switching to the target gear;
    过热保护模块：在所述预测温度超过预设温度限值时，将所述目标挡位的上一挡位设置为目标挡位；Overheating protection module: when the predicted temperature exceeds the preset temperature limit, the previous gear of the target gear is set as the target gear;
    在所述预测温度未超过所述预设温度限值时，将驾驶员请求的目标档位输出为最终的目标档位。When the predicted temperature does not exceed the preset temperature limit, the target gear requested by the driver is output as the final target gear.
  11. 一种计算机存储介质，其特征在于，所述计算机存储介质上存储有计算机程序指令，所述计算机程序指令被处理器执行时，实现如权利要求1至9中任一所述的双离合器变速器热保护方法。A computer storage medium, characterized in that, computer program instructions are stored on the computer storage medium, and when the computer program instructions are executed by a processor, the dual-clutch transmission thermal method of protection.
PCT/CN2021/073105 2021-01-21 2021-01-21 Dual-clutch transmission overheating protection method and apparatus, and computer storage medium WO2022155849A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202180067053.3A CN116685787A (en) 2021-01-21 2021-01-21 Thermal protection method and device for double clutch transmission and computer storage medium
PCT/CN2021/073105 WO2022155849A1 (en) 2021-01-21 2021-01-21 Dual-clutch transmission overheating protection method and apparatus, and computer storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/073105 WO2022155849A1 (en) 2021-01-21 2021-01-21 Dual-clutch transmission overheating protection method and apparatus, and computer storage medium

Publications (1)

Publication Number Publication Date
WO2022155849A1 true WO2022155849A1 (en) 2022-07-28

Family

ID=82548370

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/073105 WO2022155849A1 (en) 2021-01-21 2021-01-21 Dual-clutch transmission overheating protection method and apparatus, and computer storage medium

Country Status (2)

Country Link
CN (1) CN116685787A (en)
WO (1) WO2022155849A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115388100A (en) * 2022-08-30 2022-11-25 重庆长安汽车股份有限公司 Thermal protection control method and system for clutch in wet DCT launch starting process and vehicle
CN116001796A (en) * 2023-03-24 2023-04-25 盛瑞传动股份有限公司 Vehicle speed control method, device, vehicle, equipment and computer readable storage medium
CN116292876A (en) * 2023-02-23 2023-06-23 广州汽车集团股份有限公司 Vehicle starting control method, device, equipment and storage medium

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090062067A1 (en) * 2007-08-30 2009-03-05 Aisin Aw Co., Ltd Excessive oil temperature increase prevention device for torque converter of automatic transmission
CN101545535A (en) * 2008-03-28 2009-09-30 加特可株式会社 Shift control device for automatic transmission
CN105673832A (en) * 2016-01-15 2016-06-15 上海汽车变速器有限公司 Control method for semi-bonded point working condition of double-clutch automatic transmission
CN105987163A (en) * 2014-09-23 2016-10-05 现代自动车株式会社 Method for protecting clutch for dual clutch transmission
CN111071255A (en) * 2019-12-30 2020-04-28 吉利汽车研究院（宁波）有限公司 Overheating protection control method for dual-clutch automatic transmission

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8216111B2 (en) * 2010-01-15 2012-07-10 GM Global Technology Operations LLC Clutch control for a transmission
CN105570448B (en) * 2016-01-15 2018-01-12 上海汽车变速器有限公司 The low temperature gearshift optimal control method of wet dual clutch transmission
CN106763721A (en) * 2016-11-29 2017-05-31 广州汽车集团股份有限公司 A kind of vehicle automatic speed variator shift control method and device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090062067A1 (en) * 2007-08-30 2009-03-05 Aisin Aw Co., Ltd Excessive oil temperature increase prevention device for torque converter of automatic transmission
CN101545535A (en) * 2008-03-28 2009-09-30 加特可株式会社 Shift control device for automatic transmission
EP2105636A2 (en) * 2008-03-28 2009-09-30 JATCO Ltd Shift control device for automatic transmission and shift control method thereof
CN105987163A (en) * 2014-09-23 2016-10-05 现代自动车株式会社 Method for protecting clutch for dual clutch transmission
CN105673832A (en) * 2016-01-15 2016-06-15 上海汽车变速器有限公司 Control method for semi-bonded point working condition of double-clutch automatic transmission
CN111071255A (en) * 2019-12-30 2020-04-28 吉利汽车研究院（宁波）有限公司 Overheating protection control method for dual-clutch automatic transmission

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115388100A (en) * 2022-08-30 2022-11-25 重庆长安汽车股份有限公司 Thermal protection control method and system for clutch in wet DCT launch starting process and vehicle
CN115388100B (en) * 2022-08-30 2024-05-31 重庆长安汽车股份有限公司 Clutch thermal protection control method and system in wet DCT ejection starting process and vehicle
CN116292876A (en) * 2023-02-23 2023-06-23 广州汽车集团股份有限公司 Vehicle starting control method, device, equipment and storage medium
CN116292876B (en) * 2023-02-23 2024-04-26 广州汽车集团股份有限公司 Vehicle starting control method, device, equipment and storage medium
CN116001796A (en) * 2023-03-24 2023-04-25 盛瑞传动股份有限公司 Vehicle speed control method, device, vehicle, equipment and computer readable storage medium

Also Published As

Publication number Publication date
CN116685787A (en) 2023-09-01

Similar Documents

Publication Publication Date Title
WO2022155849A1 (en) Dual-clutch transmission overheating protection method and apparatus, and computer storage medium
JP5190507B2 (en) Protecting vehicle drive train during cold start
US8483920B2 (en) Shift control device for automatic transmission
US8073604B2 (en) Method and system for protecting a starting clutch
JP5786216B2 (en) Hybrid vehicle
US8374756B2 (en) Control device for automatic transmission
KR20170042386A (en) Control method of dual clutch transmission for hybrid electric vehicle and control system for the same
KR101704191B1 (en) Torque intervention for hybrid vehicle and method thereof
WO2023046058A1 (en) Vehicle ramp start control method and vehicle
CN106553635B (en) Method for protecting a clutch of a vehicle
CN108146422B (en) Clutch control method and device and automobile
US20170043779A1 (en) Control method of vehicle
CN113653797A (en) Upshift control method
CN112283327A (en) Gearbox oil temperature control method, device and equipment and readable storage medium
EP2322777B1 (en) Method and apparatus for controlling the rotation speed of a fan of the engine cooling circuit in a vehicle
EP2322778B1 (en) Method and device for the predictive estimate of the wear of the coupling joint between a cooling circuit fan and an engine system in a vehicle
CN106641234A (en) Method for controlling gear shift pattern and engine speed of vehicle
CN113357027B (en) Torque control method and device
JP5727960B2 (en) Engine output control device
JP5534332B2 (en) Shift control device
CN113847423B (en) Starting control method and system for hydraulic torque converter
CN106641228B (en) Vehicle control method
JP4954158B2 (en) Control device for automatic transmission
SE540867C2 (en) A method and arrangement for controlling a hybrid powertrain
JP2012021549A (en) Lock-up clutch controller for automatic transmission

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21920251

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 202180067053.3

Country of ref document: CN

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21920251

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 21920251

Country of ref document: EP

Kind code of ref document: A1