WO2018095006A1 - Gear shifting intervention control method for two-gear x-by-wire automatic transmission of electric car - Google Patents

Gear shifting intervention control method for two-gear x-by-wire automatic transmission of electric car Download PDF

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WO2018095006A1
WO2018095006A1 PCT/CN2017/086616 CN2017086616W WO2018095006A1 WO 2018095006 A1 WO2018095006 A1 WO 2018095006A1 CN 2017086616 W CN2017086616 W CN 2017086616W WO 2018095006 A1 WO2018095006 A1 WO 2018095006A1
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gear
speed
motor
transmission
control unit
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PCT/CN2017/086616
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French (fr)
Chinese (zh)
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曲金玉
吕娜娜
郭政斌
任传波
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山东理工大学
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Priority to CN201611031247.5A priority patent/CN106481803A/en
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Publication of WO2018095006A1 publication Critical patent/WO2018095006A1/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H59/00Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/14Inputs being a function of torque or torque demand
    • F16H59/18Inputs being a function of torque or torque demand dependent on the position of the accelerator pedal
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H59/00Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/36Inputs being a function of speed
    • F16H59/38Inputs being a function of speed of gearing elements
    • F16H59/40Output shaft speed
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H61/00Control 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
    • F16H61/04Smoothing ratio shift
    • F16H61/0437Smoothing ratio shift by using electrical signals
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H61/00Control 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
    • F16H61/26Generation or transmission of movements for final actuating mechanisms
    • F16H61/28Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H61/2807Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted using electric control signals for shift actuators, e.g. electro-hydraulic control therefor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H61/00Control 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
    • F16H61/26Generation or transmission of movements for final actuating mechanisms
    • F16H61/28Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H61/32Electric motors actuators or related electrical control means therefor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H59/00Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/36Inputs being a function of speed
    • F16H2059/366Engine or motor speed

Abstract

A gear shifting intervention control method for a two-gear X-by-wire automatic transmission of an electric car. According to the method, a D-gear switching signal, a rotating speed signal n2 of a rotating speed sensor of a transmission output shaft, a rotating speed signal n1 of a rotating speed sensor of a motor, and an opening signal α of a position sensor of an accelerator pedal are detected by an electronic control unit (100) of the transmission, so that whether a first gear needs to be shifted to a second gear or the second gear needs to be shifted to the first gear is determined, and intervention control over the rotating speed of the motor is performed during a gear shifting process. When the first gear is shifted to the second gear, a target rotating speed of the motor for shifting the first gear to the second gear is determined according to a target rotating speed function of the motor for shifting the first gear to the second gear, the electronic control unit (200) of the motor controls the rotating speed of the motor to reach the target rotating speed of the motor for shifting the first gear to the second gear, and the intervention control over the upshifting process of the X-by-wire automatic transmission is performed, so that stable upshifting of the X-by-wire automatic transmission is implemented.

Description

电动汽车两挡线控自动变速器换挡介入控制方法Two-speed line control automatic transmission shifting intervention control method for electric vehicle
本申请要求于2016年11月22日提交中国专利局、申请号为201611031247.5、发明名称为“电动汽车两挡线控自动变速器换挡介入控制方法”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。This application claims the priority of the Chinese patent application filed on November 22, 2016, the Chinese Patent Office, the application number is 201611031247.5, and the invention name is “electric vehicle two-speed automatic transmission shift control intervention method”. The citations are incorporated herein by reference.
技术领域Technical field
本发明涉及一种自动变速器的控制方法,更确切的说是一种电动汽车两挡线控自动变速器换挡介入控制方法。The invention relates to a control method of an automatic transmission, and more particularly to a shifting intervention control method for a two-speed line-controlled automatic transmission of an electric vehicle.
背景技术Background technique
自动变速器被广泛应用于汽车、电动汽车、工程机械等各种车辆。现有自动变速器主要有液力机械式自动变速器(AT)、金属带式无级自动变速器(CVT)、机械式自动变速器(AMT)、双离合器式自动变速器(DCT)四大类型。Automatic transmissions are widely used in various vehicles such as automobiles, electric vehicles, and construction machinery. The existing automatic transmission mainly has four types: hydraulic mechanical automatic transmission (AT), metal belt type automatic transmission (CVT), mechanical automatic transmission (AMT), and dual clutch automatic transmission (DCT).
上述四类自动变速器均采用电控液压伺服装置,实现换挡过程控制,结构复杂、成本高且增加了控制难度和复杂度。尤其是DCT的执行机构包括:由液压泵、液压阀及蓄能器组成的供油机构、由液压或电机驱动的脉宽调制换挡执行机构、由液压或电机驱动的离合器操纵机构。这些液压控制机构使得变速器整体结构复杂、成本高且增加了控制难度和复杂度。The above four types of automatic transmissions all adopt electronically controlled hydraulic servo devices to realize shifting process control, which has complicated structure, high cost and increased control difficulty and complexity. In particular, the actuator of the DCT includes: an oil supply mechanism composed of a hydraulic pump, a hydraulic valve and an accumulator, a pulse width modulation shifting actuator driven by a hydraulic or electric motor, and a clutch operating mechanism driven by a hydraulic or electric motor. These hydraulic control mechanisms make the overall structure of the transmission complex, costly, and increase the difficulty and complexity of control.
随着汽车电子技术、自动控制技术的逐步成熟和汽车网络通信技术的广泛应用,汽车线控技术已成为汽车未来的发展趋势。汽车线控(X-By-Wire)技术就是以电线和电子控制器来代替机械和液压系统,将驾驶员的操纵动作经过传感器变成电信号,输入到电控单元,由电控单元产生控制信号驱动执行机构进行所需操作。汽车线控技术可以降低部件的复杂度,减少液压与机械传动装置,同时电线走向布置的灵活性扩大了汽车设计的自由空间。With the gradual maturity of automotive electronic technology, automatic control technology and the extensive application of automotive network communication technology, automotive wire control technology has become the future development trend of automobiles. X-By-Wire technology replaces mechanical and hydraulic systems with wires and electronic controllers, turning the driver's steering action into an electrical signal through the sensor, inputting it to the electronic control unit, and controlling it by the electronic control unit. The signal drives the actuator to perform the desired operation. Automotive remote control technology can reduce the complexity of components, reduce hydraulic and mechanical transmissions, and the flexibility of wire-to-wire layout expands the free space of automotive design.
为实现线控自动变速器的动力换挡,即换挡过程中驾驶员无需中断电动机与线控自动变速器之间的动力,若不对电动机采用介入控制,换挡过程中电动机转速不能满足换挡转速的要求,从而造成换挡冲击,并降低电动机和线控自动变速器的寿命。为确保电动汽车两挡线控自动变速器的平 稳换挡,避免换挡过程中电动机输入动力的中断和换挡冲击,必须对电动汽车两挡线控自动变速器的换挡过程进行控制。In order to realize the power shift of the line-controlled automatic transmission, that is, the driver does not need to interrupt the power between the motor and the line-controlled automatic transmission during the shifting process. If the intervention control is not applied to the motor, the motor speed cannot meet the shifting speed during the shifting process. Requirements, resulting in shifting shocks and reducing the life of the motor and the remotely controlled automatic transmission. To ensure the flatness of the two-speed line-controlled automatic transmission of electric vehicles Stable shifting, avoiding the interruption of the input power of the motor and the shifting shock during the shifting process, must control the shifting process of the two-speed automatic transmission of the electric vehicle.
发明内容Summary of the invention
本发明的目的是提供一种既能够避免换挡过程中电动机输入动力的中断和换挡冲击,又能够实现电动汽车平稳换挡的两挡线控自动变速器换挡介入控制方法。一种电动汽车两挡线控自动变速器换挡介入控制方法,实现该控制方法的电动汽车两挡线控自动变速器的控制系统包括变速器电控单元、电动机电控单元、电动机、D挡开关、变速器输出轴转速传感器、电动机转速传感器、加速踏板位置传感器、一挡电磁离合器、二挡电磁离合器,在变速器电控单元中事先存储有一挡升二挡规律曲线、二挡降一挡规律曲线。SUMMARY OF THE INVENTION It is an object of the present invention to provide a two-speed line-controlled automatic transmission shifting intervention control method that can avoid the interruption of the input power of the motor during the shifting process and the shifting shock, and can realize the smooth shifting of the electric vehicle. A two-speed line-controlled automatic transmission shifting intervention control method for an electric vehicle, wherein the control system of the two-speed line-controlled automatic transmission of the electric vehicle comprises the transmission electronic control unit, the electric motor electronic control unit, the electric motor, the D-stop switch and the transmission The output shaft speed sensor, the motor speed sensor, the accelerator pedal position sensor, the first-order electromagnetic clutch, and the second-speed electromagnetic clutch are pre-stored in the transmission electronic control unit with a two-shift regular curve and a second-speed one-stop regular curve.
本发明的技术方案如下:The technical solution of the present invention is as follows:
电动机起动后,变速器电控单元和电动机电控单元上电,电动汽车两挡线控自动变速器换挡介入控制方法开始运行,该控制方法包括以下步骤:After the motor is started, the transmission electronic control unit and the motor electronic control unit are powered on, and the electric vehicle two-speed automatic transmission shifting intervention control method starts to operate. The control method includes the following steps:
步骤1、变速器电控单元检测D挡开关信号、变速器输出轴转速传感器的转速信号n2、电动机转速传感器的转速信号n1、加速踏板位置传感器的开度信号α;Step 1, the transmission electronic control unit detects the switching signal D range, the rotational speed of the transmission output shaft speed sensor signal of n 2, the motor speed sensor speed signal n 1, α accelerator pedal opening degree signal of the position sensor;
步骤2、判断是否挂入D挡:当变速器电控单元检测到D挡开关信号接通时,判断为挂入D挡,进行步骤3;否则,当变速器电控单元检测到D挡开关信号未接通时,判断未为挂入D挡,返回到步骤1;Step 2: judging whether the D gear is engaged: when the transmission electronic control unit detects that the D gear switch signal is turned on, it is determined that the D gear is engaged, and step 3 is performed; otherwise, when the transmission electronic control unit detects that the D gear switch signal is not When it is turned on, it is judged that it is not engaged in the D block, and returns to step 1;
步骤3、判断是否需要由一挡升二挡:当变速器电控单元检测到变速器输出轴转速传感器的转速信号n2和加速踏板位置传感器的开度信号α满足电动汽车两挡线控自动变速器一挡升二挡规律曲线上的升挡点时,判断为需要由一挡升二挡,进行步骤4;否则,当变速器电控单元检测到变速器输出轴转速传感器的转速信号n2和加速踏板位置传感器的开度信号α不满足电动汽车两挡线控自动变速器一挡升二挡规律曲线上的升挡点时,判断为不需要由一挡升二挡,进行步骤6;Step 3: judging whether it is necessary to increase the second gear by one gear: when the transmission electronic control unit detects the speed signal n 2 of the transmission output shaft speed sensor and the opening degree signal α of the accelerator pedal position sensor satisfy the two-speed automatic transmission of the electric vehicle When the upshift point on the second gear regular curve is lifted, it is judged that it is necessary to perform the second gear from the first gear, and step 4 is performed; otherwise, when the transmission electronic control unit detects the speed signal n 2 and the accelerator pedal position of the transmission output shaft speed sensor The opening signal α of the sensor does not satisfy the upshift point on the regular curve of the second gear of the two-speed line control of the electric vehicle, and it is determined that it is not necessary to increase the second gear by one gear, and step 6 is performed;
步骤4、一挡升二挡过程控制:变速器电控单元通过检测到的变速器 输出轴转速传感器的转速信号n2和一挡升二挡电动机目标转速函数f12(n2)=βn2[(Z1Z11)/(Z0Z10)-(Z2Z21)/(Z0Z20)]/[(Z1Z11)/(Z0Z10)]确定一挡升二挡电动机目标转速,电动机电控单元控制电动机转速达到一挡升二挡电动机目标转速,式中:n2为变速器输出轴的转速;Z0为输入齿轮的齿数;Z1为一挡输入齿轮的齿数;Z10为一挡主动齿轮的齿数;Z11为一挡从动齿轮的齿数;Z2为二挡输入齿轮的齿数;Z20为二挡主动齿轮的齿数;Z21为二挡从动齿轮的齿数;β为换挡目标转速变化系数;Step 4: One-speed upshift second-order process control: the transmission electronic control unit detects the transmission speed signal of the output shaft speed sensor n 2 and the first-speed second-speed motor target speed function f 12 (n 2 )=βn 2 [( Z 1 Z 11 )/(Z 0 Z 10 )-(Z 2 Z 21 )/(Z 0 Z 20 )]/[(Z 1 Z 11 )/(Z 0 Z 10 )] determines the first-speed second gear motor The target speed, the motor electronic control unit controls the motor speed to reach the target speed of the first gear and the second gear motor, where: n 2 is the speed of the transmission output shaft; Z 0 is the number of teeth of the input gear; Z 1 is the number of teeth of the first gear input gear; Z 10 is the number of teeth of the first gear drive gear; Z 11 is the number of teeth of the first gear driven gear; Z 2 is the number of teeth of the second gear input gear; Z 20 is the number of teeth of the second gear drive gear; Z 21 is the gear of the second gear driven gear Number of teeth; β is the coefficient of change of the target speed of the shifting gear;
步骤5、判断一挡升二挡是否结束:当一挡升二挡控制过程电动机转速n1大于等于一挡升二挡电动机目标转速f12(n2)时,判断为一挡升二挡控制过程尚未结束,返回到步骤4;否则,当一挡升二挡控制过程电动机转速n1小于一挡升二挡电动机目标转速f12(n2)时,判断为一挡升二挡控制过程结束,返回到步骤1;Step 5: Determine whether the first gear and the second gear are over: when the motor speed n 1 of the first gear and the second gear is greater than or equal to the target speed f 12 (n 2 ) of the first gear and the second gear, it is judged that the first gear is controlled by the second gear. The process has not ended yet, returning to step 4; otherwise, when the motor speed n 1 of the first gear upshift second control process is less than the target speed f 12 (n 2 ) of the first gear upshift second gear motor, it is judged that the first gear upshift second gear control process ends , return to step 1;
步骤6、判断是否需要由二挡降一挡:当变速器电控单元检测到变速器输出轴转速传感器的转速信号n2和加速踏板位置传感器的开度信号α满足电动汽车两挡线控自动变速器二挡降一挡规律曲线上的降挡点时,判断为需要由二挡降一挡,进行步骤7;否则,当变速器电控单元检测到变速器输出轴转速传感器的转速信号n2和加速踏板位置传感器的开度信号α不满足电动汽车两挡线控自动变速器二挡降一挡规律曲线上的降挡点时,判断为不需要由二挡降一挡,返回到步骤1;Step 6: Determine whether it is necessary to reduce the first gear by the second gear: when the transmission electronic control unit detects the speed signal n 2 of the transmission output shaft speed sensor and the opening degree signal α of the accelerator pedal position sensor satisfy the two-speed automatic transmission of the electric vehicle When the downshift point on the regular curve is blocked, it is determined that it is necessary to lower the first gear by the second gear, and step 7 is performed; otherwise, when the transmission electronic control unit detects the speed signal n 2 and the accelerator pedal position of the transmission output shaft speed sensor The opening signal α of the sensor does not satisfy the downshift point on the second curve of the second gear of the electric vehicle, and it is determined that it is not necessary to reduce the first gear by the second gear, and returns to step 1;
步骤7、二挡降一挡过程控制:变速器电控单元通过检测到的变速器输出轴转速传感器的转速信号n2和二挡降一挡电动机目标转速函数f21(n2)=βn2[(Z1Z11)/(Z0Z10)]/[(Z1Z11)/(Z0Z10)-(Z2Z21)/(Z0Z20)]确定二挡降一挡电动机目标转速,电动机电控单元控制电动机转速达到二挡降一挡电动机目标转速,式中:n2为变速器输出轴的转速;Z0为输入齿轮的齿数;Z1为一挡输入齿轮的齿数;Z10为一挡主动齿轮的齿数;Z11为一挡从动齿轮的齿数;Z2为二挡输入齿轮的齿数;Z20为二挡主动齿轮的齿数;Z21为二挡从动齿轮的齿数;β为换挡目标转速变化系数;Step 7, the second gear is reduced by one gear process control: the transmission electronic control unit detects the transmission output shaft speed sensor speed signal n 2 and the second gear down first gear motor target speed function f 21 (n 2 )=βn 2 [( Z 1 Z 11 )/(Z 0 Z 10 )]/[(Z 1 Z 11 )/(Z 0 Z 10 )-(Z 2 Z 21 )/(Z 0 Z 20 )]] The target speed, the motor electronic control unit controls the motor speed to reach the second gear and the first gear motor target speed, where: n 2 is the speed of the transmission output shaft; Z 0 is the number of teeth of the input gear; Z 1 is the number of teeth of the first gear input gear; Z 10 is the number of teeth of the first gear drive gear; Z 11 is the number of teeth of the first gear driven gear; Z 2 is the number of teeth of the second gear input gear; Z 20 is the number of teeth of the second gear drive gear; Z 21 is the gear of the second gear driven gear Number of teeth; β is the coefficient of change of the target speed of the shifting gear;
步骤8、判断二挡降一挡是否结束:当二挡降一挡控制过程电动机转速n1小于等于二挡降一挡电动机目标转速f21(n2)时,判断为二挡降一挡控制过程尚未结束,返回到步骤7;否则,当二挡降一挡控制过程电动机转 速n1大于二挡降一挡电动机目标转速f21(n2)时,判断为二挡降一挡控制过程结束,返回到步骤1;Step 8, it is judged the second gear down a gear is ended: when the second gear down a speed control process motor speed n 1 or less second gear down a gear motor target rotational speed f 21 (n 2), it is determined that the second gear down one gear control The process has not ended yet, returning to step 7; otherwise, when the motor speed n 1 of the second gear downshift control process is greater than the second gear down first gear motor target speed f 21 (n 2 ), it is determined that the second gear down first gear control process ends , return to step 1;
驾驶员关断点火开关后,变速器电控单元和电动机电控单元断电,电动汽车两挡线控自动变速器换挡介入控制方法结束运行。After the driver turns off the ignition switch, the transmission electronic control unit and the motor electronic control unit are powered off, and the electric vehicle two-speed automatic transmission shifting intervention control method ends.
在上述步骤4一挡升二挡过程、步骤7二挡降一挡过程控制中,换挡目标转速变化系数β是设定的一个固定值,β=0.95~1.05。In the above-mentioned step 4, the process of the first gear and the second gear, the shifting target speed change coefficient β is a fixed value set, β=0.95~1.05.
本发明与现有技术相比,其优点是:Compared with the prior art, the invention has the following advantages:
本发明的电动汽车两挡线控自动变速器换挡介入控制方法,采用换挡介入的方式控制电动机转速,根据电动机换挡目标转速函数确定电动机换挡目标转速,由变速器电控单元将控制信号输送给电动机电控单元,电动机电控单元控制电动机转速,在驾驶员正常操纵加速踏板的情况下实现平顺换挡,避免换挡过程中的换挡冲击和动力中断。The electric vehicle two-speed automatic transmission shift control intervention control method adopts a shift intervention method to control the motor speed, determines a motor shift target speed according to a motor shift target speed function, and transmits a control signal by the transmission electronic control unit. For the motor electronic control unit, the motor electronic control unit controls the motor speed to achieve smooth shifting when the driver normally operates the accelerator pedal, avoiding shift shock and power interruption during shifting.
说明书附图Instruction sheet
下面结合附图对本发明作进一步说明:The present invention will be further described below in conjunction with the accompanying drawings:
图1是本发明实施例的电动汽车两挡线控自动变速器控制系统与传动装置的结构示意图及其动力传递路线。1 is a schematic structural view of a two-speed line-controlled automatic transmission control system and a transmission device of an electric vehicle according to an embodiment of the present invention, and a power transmission route thereof.
图2是本发明实施例的电动汽车两挡线控自动变速器换挡介入控制方法流程图。2 is a flow chart of a shifting intervention control method for a two-speed line-controlled automatic transmission of an electric vehicle according to an embodiment of the present invention.
图3是本发明实施例的电动汽车两挡线控自动变速器换挡规律曲线示意图。3 is a schematic diagram showing a shifting rule curve of a two-speed line-controlled automatic transmission of an electric vehicle according to an embodiment of the present invention.
图中:10.输入轴 11.一挡输入轴 12.二挡输入轴 30.输入齿轮 31.一挡输入齿轮 32.二挡输入齿轮 41.一挡电磁离合器 411.一挡电磁离合器电磁线圈 42.二挡电磁离合器 421.二挡电磁离合器电磁线圈 51.一挡主动齿轮 52.二挡主动齿轮 61.一挡输出轴 62.二挡输出轴 71.一挡从动齿轮 72.二挡从动齿轮 8.变速器输出轴 100.变速器电控单元 100a.一挡控制输出端子 100b.二挡控制输出端子 100d.电动机目标转速控制输出端子 200.电动机电控单元 300.电动机 D-SW.D挡开关 APS.加速踏板位置传感器 OSS.变速器输出轴转速传感器 ESS.电动机转速传感器 D12.一挡升二挡规律曲线 D21.二挡降一挡规律曲线。 In the figure: 10. Input shaft 11. First gear input shaft 12. Second gear input shaft 30. Input gear 31. First gear input gear 32. Second gear input gear 41. First gear electromagnetic clutch 411. First gear electromagnetic clutch electromagnetic coil 42 Second gear electromagnetic clutch 421. Second gear electromagnetic clutch electromagnetic coil 51. First gear drive gear 52. Second gear drive gear 61. First gear output shaft 62. Second gear output shaft 71. First gear driven gear 72. Second gear slave Gear 8. Transmission output shaft 100. Transmission electronic control unit 100a. First gear control output terminal 100b. Second gear control output terminal 100d. Motor target speed control output terminal 200. Motor electronic control unit 300. Motor D-SW. APS. Accelerator pedal position sensor OSS. Transmission output shaft speed sensor ESS. Motor speed sensor D 12 . One gear up second gear regular curve D 21 . Second gear down one gear regular curve.
具体实施方式detailed description
下面结合本发明实施例中的附图,对本发明实施例中技术方案进行详细的描述,显然,所描述的实施例仅是本发明一部分实施例,而不是全部的实施例;基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例都属于本发明保护的范围。The technical solutions in the embodiments of the present invention are described in detail below with reference to the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; All other embodiments obtained by those skilled in the art without creative efforts are within the scope of the present invention.
一种电动汽车两挡线控自动变速器换挡介入控制方法,实现本发明实施例的电动汽车两挡线控自动变速器的控制系统包括变速器电控单元100、电动机电控单元200、电动机300、D挡开关D-SW、变速器输出轴转速传感器OSS、电动机转速传感器ESS、加速踏板位置传感器APS、一挡电磁离合器41、二挡电磁离合器42,在变速器电控单元100中事先存储有一挡升二挡规律曲线D12、二挡降一挡规律曲线D21A two-speed line-controlled automatic transmission shifting intervention control method for an electric vehicle, the control system of the electric two-speed automatic transmission of the electric vehicle according to the embodiment of the invention comprises a transmission electronic control unit 100, a motor electronic control unit 200, an electric motor 300, D The shift switch D-SW, the transmission output shaft speed sensor OSS, the motor speed sensor ESS, the accelerator pedal position sensor APS, the first-order electromagnetic clutch 41, and the second-speed electromagnetic clutch 42 store a shift second gear in the transmission electronic control unit 100 in advance. The regular curve D 12 and the second gear are reduced by the first regular curve D 21 .
一挡电磁离合器电磁线圈411的接线端子通过导线与变速器电控单元100的一挡控制输出端子100a相连接;二挡电磁离合器电磁线圈421的接线端子通过导线与变速器电控单元100的二挡控制输出端子100b相连接。The terminal of the first-order electromagnetic clutch electromagnetic coil 411 is connected to the first-speed control output terminal 100a of the transmission electronic control unit 100 through a wire; the terminal of the second-speed electromagnetic clutch electromagnetic coil 421 is controlled by the second gear of the wire and the transmission electronic control unit 100. The output terminals 100b are connected.
变速器电控单元100通过控制一挡电磁离合器电磁线圈411、二挡电磁离合器电磁线圈421的通电或断电,从而控制一挡电磁离合器41、二挡电磁离合器42的接合和分离。The transmission electronic control unit 100 controls the engagement and disengagement of the first-order electromagnetic clutch 41 and the second-speed electromagnetic clutch 42 by controlling energization or de-energization of the first-order electromagnetic clutch electromagnetic coil 411 and the second-speed electromagnetic clutch electromagnetic coil 421.
变速器电控单元100的电动机目标转速控制输出端子100d通过导线与电动机电控单元200相连接,电动机电控单元200通过导线与电动机300相连接,控制电动机转速达到电动机目标转速。The motor target speed control output terminal 100d of the transmission electronic control unit 100 is connected to the motor electronic control unit 200 via a wire, and the motor electronic control unit 200 is connected to the motor 300 through a wire to control the motor speed to reach the motor target speed.
实现本发明实施例的电动汽车两挡线控自动变速器的传动装置包括输入轴10、一挡输入轴11、二挡输入轴12、一挡输出轴61、二挡输出轴62、变速器输出轴8;在输入轴10上固定连接有输入齿轮30;输入齿轮30沿其齿轮周向外侧依次与一挡输入齿轮31、二挡输入齿轮32常啮合;一挡输入齿轮31、二挡输入齿轮32分别与一挡电磁离合器41的被动端、二挡电磁离合器42的被动端连接;一挡电磁离合器41的主动端、二挡电磁离合器42的主动端分别通过一挡输出轴61、二挡输出轴62与一挡主动齿轮51、二挡主动齿轮52连接;一挡主动齿轮51、二挡主动齿轮52分别沿其齿轮周向外侧依次与一挡从动齿轮71、二挡从动齿轮72常啮合。 The transmission device for realizing the two-speed automatic transmission of the electric vehicle of the embodiment of the invention comprises an input shaft 10, a first input shaft 11, a second input shaft 12, a first output shaft 61, a second output shaft 62, and a transmission output shaft 8. An input gear 30 is fixedly connected to the input shaft 10; the input gear 30 is sequentially meshed with the first input gear 31 and the second gear input gear 32 along the circumferential direction of the gear; the first input gear 31 and the second gear input gear 32 respectively The passive end of the first-order electromagnetic clutch 41 and the passive end of the second-speed electromagnetic clutch 42 are connected; the active end of the first-order electromagnetic clutch 41 and the active end of the second-speed electromagnetic clutch 42 respectively pass through the first output shaft 61 and the second output shaft 62. The first gear drive gear 51 and the second gear drive gear 52 are respectively meshed with the first gear driven gear 71 and the second gear driven gear 72 in the circumferential direction of the gear.
下面结合图1、图2、图3进一步说明本发明实施例的电动汽车两挡线控自动变速器的各前进挡的动力传递路线。The power transmission route of each forward gear of the two-speed automatic transmission of the electric vehicle according to the embodiment of the present invention will be further described below with reference to FIG. 1, FIG. 2 and FIG.
一挡传动:变速器电控单元100控制一挡电磁离合器41通电接合,二挡电磁离合器42断电分离,电动机300输出的动力通过输入轴10传递给输入齿轮30,输入齿轮30将该动力进一步传递给一挡输入齿轮31,再通过接合的一挡电磁离合器41传递给一挡从动齿轮71,进而将动力传递至变速器输出轴8,实现一挡传动。The first gear transmission: the transmission electronic control unit 100 controls the first-speed electromagnetic clutch 41 to be energized and engaged, the second-speed electromagnetic clutch 42 is de-energized, and the power output from the motor 300 is transmitted to the input gear 30 through the input shaft 10, and the input gear 30 further transmits the power. The input gear 31 is input to the first gear, and then transmitted to the first driven gear 71 through the engaged first-speed electromagnetic clutch 41, thereby transmitting power to the transmission output shaft 8 to realize the first-speed transmission.
二挡传动:变速器电控单元100控制二挡电磁离合器42通电接合,一挡电磁离合器41断电分离,电动机300输出的动力通过输入轴10传递给输入齿轮30,输入齿轮30将该动力进一步传递给二挡输入齿轮32,再通过接合的二挡电磁离合器42传递给二挡从动齿轮72,进而将动力传递至变速器输出轴8,实现二挡传动。Second gear transmission: The transmission electronic control unit 100 controls the second-speed electromagnetic clutch 42 to be energized and engaged, the first-speed electromagnetic clutch 41 is de-energized, and the power output from the motor 300 is transmitted to the input gear 30 through the input shaft 10, and the input gear 30 further transmits the power. The second gear input gear 32 is transmitted to the second gear driven gear 72 through the engaged second gear electromagnetic clutch 42, and the power is transmitted to the transmission output shaft 8 to realize the second gear transmission.
空挡:变速器电控单元100控制一挡电磁离合器41、二挡电磁离合器42均处于断电分离状态,实现空挡。Neutral: The transmission electronic control unit 100 controls the first-order electromagnetic clutch 41 and the second-speed electromagnetic clutch 42 to be in a power-off state to achieve neutral.
本发明的电动汽车两挡线控自动变速器换挡介入控制方法流程图如图2所示,电动机300起动后,变速器电控单元100和电动机电控单元200上电,电动汽车两挡线控自动变速器换挡介入控制方法开始运行,该控制方法包括以下步骤:The flow chart of the shifting intervention control method for the two-speed line-controlled automatic transmission of the electric vehicle of the present invention is shown in FIG. 2. After the motor 300 is started, the transmission electronic control unit 100 and the motor electronic control unit 200 are powered on, and the two-speed line control of the electric vehicle is automatically controlled. The transmission shift intervention control method begins to operate, and the control method includes the following steps:
步骤S1、变速器电控单元100检测D挡开关D-SW信号、变速器输出轴转速传感器OSS的转速信号n2、电动机转速传感器的转速信号n1、加速踏板位置传感器APS的开度信号α;Step S1, the transmission electronic control unit 100 detects the D-switch D-SW signal, the transmission output shaft speed sensor OSS speed signal n 2 , the motor speed sensor speed signal n 1 , the accelerator pedal position sensor APS opening degree signal α;
步骤S2、判断是否挂入D挡:当变速器电控单元100检测到D挡开关D-SW信号接通时,判断为挂入D挡,进行步骤S3;否则,当变速器电控单元100检测到D挡开关D-SW信号未接通时,判断未为挂入D挡,返回到步骤S1;Step S2: determining whether the D gear is engaged: when the transmission electronic control unit 100 detects that the D gear SW signal is turned on, it is determined that the D gear is engaged, and step S3 is performed; otherwise, when the transmission electronic control unit 100 detects When the D-stop switch D-SW signal is not turned on, it is judged that the D-stop is not engaged, and the process returns to step S1;
步骤S3、判断是否需要由一挡升二挡:当变速器电控单元100检测到变速器输出轴转速传感器OSS的转速信号n2和加速踏板位置传感器APS的开度信号α满足电动汽车两挡线控自动变速器一挡升二挡规律曲线D12上的升挡点时,判断为需要由一挡升二挡,进行步骤S4;否则,当变速器电控单元100检测到变速器输出轴转速传感器OSS的转速信号 n2和加速踏板位置传感器APS的开度信号α不满足电动汽车两挡线控自动变速器一挡升二挡规律曲线D12上的升挡点时,判断为不需要由一挡升二挡,进行步骤S6;Step S3, determining whether it is necessary to increase the second gear by one gear: when the transmission electronic control unit 100 detects that the speed signal n 2 of the transmission output shaft speed sensor OSS and the opening degree signal α of the accelerator pedal position sensor APS satisfy the two-speed control of the electric vehicle when the automatic transmission a gear speed law curve D + 2 on the upshift point 12, a block is determined by the need to block two liter, step S4; otherwise, when the transmission electronic control unit 100 detects the rotational speed of the transmission output speed sensor shaft OSS The signal n 2 and the opening degree signal α of the accelerator pedal position sensor APS do not satisfy the upshift point on the first-speed second-shift rule D 12 of the two-speed line-controlled automatic transmission of the electric vehicle, and it is determined that it is not necessary to increase the second gear by one gear. Going to step S6;
步骤S4、一挡升二挡过程控制:变速器电控单元100通过检测到的变速器输出轴转速传感器OSS的转速信号n2和一挡升二挡电动机目标转速函数f12(n2)=βn2[(Z1Z11)/(Z0Z10)-(Z2Z21)/(Z0Z20)]/[(Z1Z11)/(Z0Z10)]确定一挡升二挡电动机目标转速,电动机电控单元200控制电动机转速达到一挡升二挡电动机目标转速,式中:n2为变速器输出轴8的转速;Z0为输入齿轮30的齿数;Z1为一挡输入齿轮31的齿数;Z10为一挡主动齿轮51的齿数;Z11为一挡从动齿轮71的齿数;Z2为二挡输入齿轮32的齿数;Z20为二挡主动齿轮52的齿数;Z21为二挡从动齿轮72的齿数;β为换挡目标转速变化系数;Step S4, one-speed second-shift process control: the transmission electronic control unit 100 passes the detected speed signal n 2 of the transmission output shaft speed sensor OSS and the first-speed second-speed motor target speed function f 12 (n 2 )=βn 2 [(Z 1 Z 11 )/(Z 0 Z 10 )-(Z 2 Z 21 )/(Z 0 Z 20 )]/[(Z 1 Z 11 )/(Z 0 Z 10 )] The motor motor control unit 200 controls the motor speed to reach the target speed of the first gear and the second gear motor, where n 2 is the speed of the transmission output shaft 8; Z 0 is the number of teeth of the input gear 30; Z 1 is the first gear The number of teeth of the input gear 31; Z 10 is the number of teeth of the first gear drive gear 51; Z 11 is the number of teeth of the first gear driven gear 71; Z 2 is the number of teeth of the second gear input gear 32; Z 20 is the number of teeth of the second gear drive gear 52 ; Z 21 is the number of teeth of the second gear driven gear 72; β is the coefficient of change of the shift target speed;
步骤S5、判断一挡升二挡是否结束:当一挡升二挡控制过程电动机转速n1大于等于一挡升二挡电动机目标转速f12(n2)时,判断为一挡升二挡控制过程尚未结束,返回到步骤S4;否则,当一挡升二挡控制过程电动机转速n1小于一挡升二挡电动机目标转速f12(n2)时,判断为一挡升二挡控制过程结束,返回到步骤S1;Step S5: judging whether the second gear of the first gear is finished or not: when the motor speed n 1 of the first gear and the second gear is greater than or equal to the target speed f 12 (n 2 ) of the first gear and the second gear, it is determined that the first gear is controlled by the second gear. The process has not ended yet, and the process returns to step S4; otherwise, when the motor speed n 1 of the first gear upshift second control process is less than the target speed f 12 (n 2 ) of the first gear upshift second gear motor, it is determined that the first gear upshift second gear control process ends Go back to step S1;
步骤S6、判断是否需要由二挡降一挡:当变速器电控单元100检测到变速器输出轴转速传感器OSS的转速信号n2和加速踏板位置传感器APS的开度信号α满足电动汽车两挡线控自动变速器二挡降一挡规律曲线D21上的降挡点时,判断为需要由二挡降一挡,进行步骤S7;否则,当变速器电控单元100检测到变速器输出轴转速传感器OSS的转速信号n2和加速踏板位置传感器APS的开度信号α不满足电动汽车两挡线控自动变速器二挡降一挡规律曲线D21上的降挡点时,判断为不需要由二挡降一挡,返回到步骤S1;Step S6: determining whether it is necessary to reduce the first gear by the second gear: when the transmission electronic control unit 100 detects that the speed signal n 2 of the transmission output shaft speed sensor OSS and the opening degree signal α of the accelerator pedal position sensor APS satisfy the electric vehicle two-speed line control When the second gear of the automatic transmission is lowered to the downshift point on the normal curve D 21 , it is determined that it is necessary to lower the first gear by the second gear, and step S7 is performed; otherwise, when the transmission electronic control unit 100 detects the rotational speed of the transmission output shaft rotational speed sensor OSS when the signal n 2 and α opening signal of the accelerator position sensor APS electric vehicle does not satisfy the two-wire speed automatic transmission downshift two gears down 21 points on a curve are block D, is determined by the second gear does not need a gear down Go back to step S1;
步骤S7、二挡降一挡过程控制:变速器电控单元100通过检测到的变速器输出轴转速传感器OSS的转速信号n2和二挡降一挡电动机目标转速函数f21(n2)=βn2[(Z1Z11)/(Z0Z10)]/[(Z1Z11)/(Z0Z10)-(Z2Z21)/(Z0Z20)]确定二挡降一挡电动机目标转速,电动机电控单元200控制电动机转速达到二挡降 一挡电动机目标转速,式中:n2为变速器输出轴8的转速;Z0为输入齿轮30的齿数;Z1为一挡输入齿轮31的齿数;Z10为一挡主动齿轮51的齿数;Z11为一挡从动齿轮71的齿数;Z2为二挡输入齿轮32的齿数;Z20为二挡主动齿轮52的齿数;Z21为二挡从动齿轮72的齿数;β为换挡目标转速变化系数;Step S7, the second gear downshift process control: the transmission electronic control unit 100 passes the detected transmission output shaft speed sensor OSS speed signal n 2 and the second gear down first motor target speed function f 21 (n 2 )=βn 2 [(Z 1 Z 11 )/(Z 0 Z 10 )]/[(Z 1 Z 11 )/(Z 0 Z 10 )-(Z 2 Z 21 )/(Z 0 Z 20 )]] The motor motor control unit 200 controls the motor speed to reach the second gear down first gear motor target speed, where: n 2 is the speed of the transmission output shaft 8; Z 0 is the number of teeth of the input gear 30; Z 1 is the first gear The number of teeth of the input gear 31; Z 10 is the number of teeth of the first gear drive gear 51; Z 11 is the number of teeth of the first gear driven gear 71; Z 2 is the number of teeth of the second gear input gear 32; Z 20 is the number of teeth of the second gear drive gear 52 ; Z 21 is the number of teeth of the second gear driven gear 72; β is the coefficient of change of the shift target speed;
步骤S8、判断二挡降一挡是否结束:当二挡降一挡控制过程电动机转速n1小于等于二挡降一挡电动机目标转速f21(n2)时,判断为二挡降一挡控制过程尚未结束,返回到步骤S7;否则,当二挡降一挡控制过程电动机转速n1大于二挡降一挡电动机目标转速f21(n2)时,判断为二挡降一挡控制过程结束,返回到步骤S1;Step S8: determining whether the second gear is reduced by one gear: when the motor speed n 1 of the second gear is reduced by one gear is less than or equal to the second gear and the first gear motor target speed f 21 (n 2 ), it is determined that the second gear is reduced by one gear. The process has not ended yet, and the process returns to step S7; otherwise, when the motor speed n 1 of the second gear downshift control process is greater than the second gear down first gear motor target speed f 21 (n 2 ), it is determined that the second gear down first gear control process ends. Go back to step S1;
驾驶员关断点火开关后,变速器电控单元100和电动机电控单元200断电,电动汽车两挡线控自动变速器换挡介入控制方法结束运行。After the driver turns off the ignition switch, the transmission electronic control unit 100 and the motor electronic control unit 200 are powered off, and the electric vehicle two-speed automatic transmission shifting intervention control method ends.
本实施例中,换挡目标转速变化系数β取为1。In the present embodiment, the shift target rotation speed variation coefficient β is taken as 1.
下面结合图3进一步说明本发明实施例步骤S3判断是否需要由一挡升二挡:In the following, with reference to FIG. 3, step S3 of the embodiment of the present invention is further determined whether it is necessary to increase the second gear by one gear:
如图3所示,本发明实施例电动汽车两挡线控自动变速器换挡规律曲线示意图,D12为一挡升二挡规律曲线;当变速器输出轴转速信号n2和加速踏板开度信号α运行到D12曲线上的A(1450,50)点时,变速器电控单元100根据电动汽车两挡线控自动变速器升挡规律判定A点为一挡升二挡规律曲线D12上的升挡点,判断为需要进行一挡升二挡过程控制;否则,判断为不需要进行一挡升二挡过程控制。As shown in FIG. 3, a schematic diagram of a shifting regular curve of a two-speed line-controlled automatic transmission of an electric vehicle according to an embodiment of the present invention, D 12 is a first-speed second-shift rule; when the transmission output shaft speed signal n 2 and an accelerator opening signal α are When running to the point A (1450, 50) on the D 12 curve, the transmission electronic control unit 100 determines that the point A is the upshift on the first-speed second-shift rule D 12 according to the upshift rule of the two-speed line-controlled automatic transmission of the electric vehicle. Point, it is judged that it is necessary to perform one-speed upshift second-order process control; otherwise, it is judged that it is not necessary to perform one-speed upshift second-order process control.
下面结合图3进一步说明本发明实施例步骤S6判断是否需要由二挡降一挡:In the following, with reference to FIG. 3, step S6 of the embodiment of the present invention is further determined whether it is necessary to reduce the first gear by the second gear:
如图3所示,本发明实施例电动汽车两挡线控自动变速器换挡规律曲线示意图,D21为二挡降一挡规律曲线;当变速器输出轴转速信号n2和加速踏板开度信号α运行到D21曲线上的B(950,50)点时,变速器电控单元100根据电动汽车两挡线控自动变速器降挡规律判定B点为二挡降一挡规律曲线D21上的降挡点,判定为需要进行二挡降一挡过程控制;否则,判定为不需要进行二挡降一挡过程控制。 As shown in FIG. 3, a schematic diagram of a shifting regular curve of a two-speed line-controlled automatic transmission of an electric vehicle according to an embodiment of the present invention, D 21 is a second-speed one-shift regular curve; when the transmission output shaft speed signal n 2 and an accelerator opening degree signal α When running to the B (950, 50) point on the D 21 curve, the transmission electronic control unit 100 determines that the B point is the second gear and the first gear shifting curve D21 according to the electric vehicle two-speed automatic transmission downshift law. It is determined that it is necessary to perform the second gear down one gear process control; otherwise, it is determined that the second gear down one gear process control is not required.
上面结合附图对本发明的实施方式作了详细说明,但是本发明并不限于上述实施方式,在所属技术领域普通技术人员所具备的知识范围内,还可以在不脱离本发明宗旨的前提下做出各种变化。 The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, and can be made without departing from the scope of the present invention within the knowledge of those skilled in the art. Various changes.

Claims (2)

  1. 一种电动汽车两挡线控自动变速器换挡介入控制方法,实现该控制方法的电动汽车两挡线控自动变速器的控制系统包括变速器电控单元(100)、电动机电控单元(200)、电动机(300)、D挡开关(D-SW)、变速器输出轴转速传感器(OSS)、电动机转速传感器(ESS)、加速踏板位置传感器(APS)、一挡电磁离合器(41)、二挡电磁离合器(42),在变速器电控单元(100)中事先存储有一挡升二挡规律曲线(D12)和二挡降一挡规律曲线(D21),其特征在于,所述控制方法包括以下步骤:An electric vehicle two-speed line-controlled automatic transmission shifting intervention control method, the control system of the electric vehicle two-speed line-controlled automatic transmission implementing the control method comprises a transmission electronic control unit (100), a motor electronic control unit (200), an electric motor (300), D-stop switch (D-SW), transmission output shaft speed sensor (OSS), motor speed sensor (ESS), accelerator pedal position sensor (APS), first-order electromagnetic clutch (41), second-speed electromagnetic clutch ( 42), in the transmission electronic control unit (100), a two-speed second-shift regular curve (D 12 ) and a second-speed second-shift regular curve (D 21 ) are stored in advance, wherein the control method comprises the following steps:
    步骤1、变速器电控单元(100)检测D挡开关(D-SW)信号、变速器输出轴转速传感器(OSS)的转速信号n2、电动机转速传感器(ESS)的转速信号n1、加速踏板位置传感器(APS)的开度信号α;Step 1. The transmission electronic control unit (100) detects the D-switch (D-SW) signal, the transmission output shaft speed sensor (OSS) speed signal n 2 , the motor speed sensor (ESS) speed signal n 1 , the accelerator pedal position Sensor (APS) opening signal α;
    步骤2、判断是否挂入D挡:当变速器电控单元(100)检测到D挡开关(D-SW)信号接通时,判断为挂入D挡,进行步骤3;否则,当变速器电控单元(100)检测到D挡开关(D-SW)信号未接通时,判断未为挂入D挡,返回到步骤1;Step 2: judging whether the D gear is engaged: when the transmission electronic control unit (100) detects that the D gear switch (D-SW) signal is turned on, it is determined that the D gear is engaged, and step 3 is performed; otherwise, when the transmission is electronically controlled When the unit (100) detects that the D-stop switch (D-SW) signal is not turned on, it determines that the D-stop is not engaged, and returns to step 1;
    步骤3、判断是否需要由一挡升二挡:当变速器电控单元(100)检测到变速器输出轴转速传感器(OSS)的转速信号n2和加速踏板位置传感器(APS)的开度信号α满足电动汽车两挡线控自动变速器一挡升二挡规律曲线(D12)上的升挡点时,判断为需要由一挡升二挡,进行步骤4;否则,当变速器电控单元(100)检测到变速器输出轴转速传感器(OSS)的转速信号n2和加速踏板位置传感器(APS)的开度信号α不满足电动汽车两挡线控自动变速器一挡升二挡规律曲线(D12)上的升挡点时,判断为不需要由一挡升二挡,进行步骤6;Step 3: Determine whether it is necessary to increase the second gear by one gear: when the transmission electronic control unit (100) detects that the speed signal n 2 of the transmission output shaft speed sensor (OSS) and the opening degree signal α of the accelerator pedal position sensor (APS) satisfy When the two-speed line-controlled automatic transmission of the electric vehicle is in the upshift point on the second-shift regular curve (D 12 ), it is judged that it needs to be lifted from the second gear by one gear, and step 4 is performed; otherwise, when the transmission electronic control unit (100) It is detected that the speed signal n 2 of the transmission output shaft speed sensor (OSS) and the opening degree signal α of the accelerator pedal position sensor (APS) do not satisfy the first-speed second-shift rule (D 12 ) of the two-speed line-controlled automatic transmission of the electric vehicle. When the upshift point is determined, it is judged that it is not necessary to raise the second gear by one gear, and step 6 is performed;
    步骤4、一挡升二挡过程控制:变速器电控单元(100)通过检测到的变速器输出轴转速传感器(OSS)的转速信号n2和一挡升二挡电动机目标转速函数f12(n2)=βn2[(Z1Z11)/(Z0Z10)-(Z2Z21)/(Z0Z20)]/[(Z1Z11)/(Z0Z10)]确定一挡升二挡电动机目标转速,电动机电控单元(200)控制电动机转速达到一挡升二挡电动机目标转速,式中:n2为变速器输出轴(8)的转速;Z0为输入齿轮(30)的齿数;Z1为一挡输入齿轮(31)的齿数;Z10为一挡主动齿轮(51)的齿数;Z11为一挡从动齿轮(71)的齿数;Z2为二挡输入齿轮(32)的齿数;Z20为二挡主动齿轮(52)的齿数;Z21为二挡从动 齿轮(72)的齿数;β为换挡目标转速变化系数;Step 4: One-speed second-shift process control: the transmission electronic control unit (100) passes the detected transmission output shaft speed sensor (OSS) speed signal n 2 and the first-speed second-speed motor target speed function f 12 (n 2 ) = βn 2 [(Z 1 Z 11 ) / (Z 0 Z 10 ) - (Z 2 Z 21 ) / (Z 0 Z 20 )] / [(Z 1 Z 11 ) / (Z 0 Z 10 )] The first motor speed control unit (200) controls the motor speed to reach the target speed of the first gear and the second gear motor. In the formula: n 2 is the speed of the transmission output shaft (8); Z 0 is the input gear ( 30) the number of teeth; Z 1 is the number of teeth of the first gear input gear (31); Z 10 is the number of teeth of the first gear drive gear (51); Z 11 is the number of teeth of the first gear driven gear (71); Z 2 is the second gear The number of teeth of the input gear (32); Z 20 is the number of teeth of the second gear drive gear (52); Z 21 is the number of teeth of the second gear driven gear (72); β is the coefficient of change of the shift target speed;
    步骤5、判断一挡升二挡是否结束:当一挡升二挡控制过程电动机转速n1大于等于一挡升二挡电动机目标转速f12(n2)时,判断为一挡升二挡控制过程尚未结束,返回到步骤4;否则,当一挡升二挡控制过程电动机转速n1小于一挡升二挡电动机目标转速f12(n2)时,判断为一挡升二挡控制过程结束,返回到步骤1;Step 5: Determine whether the first gear and the second gear are over: when the motor speed n 1 of the first gear and the second gear is greater than or equal to the target speed f 12 (n 2 ) of the first gear and the second gear, it is judged that the first gear is controlled by the second gear. The process has not ended yet, returning to step 4; otherwise, when the motor speed n 1 of the first gear upshift second control process is less than the target speed f 12 (n 2 ) of the first gear upshift second gear motor, it is judged that the first gear upshift second gear control process ends , return to step 1;
    步骤6、判断是否需要由二挡降一挡:当变速器电控单元(100)检测到变速器输出轴转速传感器(OSS)的转速信号n2和加速踏板位置传感器(APS)的开度信号α满足电动汽车两挡线控自动变速器二挡降一挡规律曲线(D21)上的降挡点时,判断为需要由二挡降一挡,进行步骤7;否则,当变速器电控单元(100)检测到变速器输出轴转速传感器(OSS)的转速信号n2和加速踏板位置传感器(APS)的开度信号α不满足电动汽车两挡线控自动变速器二挡降一挡规律曲线(D21)上的降挡点时,判断为不需要由二挡降一挡,返回到步骤1;Step 6. Determine whether it is necessary to reduce the first gear by the second gear: when the transmission electronic control unit (100) detects that the speed signal n 2 of the transmission output shaft speed sensor (OSS) and the opening degree signal α of the accelerator pedal position sensor (APS) satisfy When the second gear of the electric two-speed automatic transmission is downshifted on the first curve of the first gear (D 21 ), it is judged that it needs to be lowered by the second gear and step 7; otherwise, when the transmission electronic control unit (100) It is detected that the speed signal n 2 of the transmission output shaft speed sensor (OSS) and the opening degree signal α of the accelerator pedal position sensor (APS) do not satisfy the second gear shift first gear regular curve (D 21 ) of the two-speed line control automatic transmission of the electric vehicle. When the downshift point is determined, it is judged that it is not necessary to reduce the first gear by the second gear, and returns to step 1;
    步骤7、二挡降一挡过程控制:变速器电控单元(100)通过检测到的变速器输出轴转速传感器(OSS)的转速信号n2和二挡降一挡电动机目标转速函数f21(n2)=βn2[(Z1Z11)/(Z0Z10)]/[(Z1Z11)/(Z0Z10)-(Z2Z21)/(Z0Z20)]确定二挡降一挡电动机目标转速,电动机电控单元(200)控制电动机转速达到二挡降一挡电动机目标转速,式中:n2为变速器输出轴(8)的转速;Z0为输入齿轮(30)的齿数;Z1为一挡输入齿轮(31)的齿数;Z10为一挡主动齿轮(51)的齿数;Z11为一挡从动齿轮(71)的齿数;Z2为二挡输入齿轮(32)的齿数;Z20为二挡主动齿轮(52)的齿数;Z21为二挡从动齿轮(72)的齿数;β为换挡目标转速变化系数;Step 7. The second gear is reduced to the first gear process control: the transmission electronic control unit (100) passes the detected transmission output shaft speed sensor (OSS) speed signal n 2 and the second gear down first gear motor target speed function f 21 (n 2 ) = βn 2 [(Z 1 Z 11) / (Z 0 Z 10)] / [(Z 1 Z 11) / (Z 0 Z 10) - (Z 2 Z 21) / (Z 0 Z 20)] is determined The second gear lowers the target speed of the first gear motor, and the motor electronic control unit (200) controls the motor speed to reach the second gear down first gear motor target speed, where: n 2 is the speed of the transmission output shaft (8); Z 0 is the input gear ( 30) the number of teeth; Z 1 is the number of teeth of the first gear input gear (31); Z 10 is the number of teeth of the first gear drive gear (51); Z 11 is the number of teeth of the first gear driven gear (71); Z 2 is the second gear The number of teeth of the input gear (32); Z 20 is the number of teeth of the second gear drive gear (52); Z 21 is the number of teeth of the second gear driven gear (72); β is the coefficient of change of the shift target speed;
    步骤8、判断二挡降一挡是否结束:当二挡降一挡控制过程电动机转速n1小于等于二挡降一挡电动机目标转速f21(n2)时,判断为二挡降一挡控制过程尚未结束,返回到步骤7;否则,当二挡降一挡控制过程电动机转速n1大于二挡降一挡电动机目标转速f21(n2)时,判断为二挡降一挡控制过程结束,返回到步骤1。Step 8: Determine whether the second gear lowers the first gear or not: when the second gear is reduced to the first gear control process, the motor speed n 1 is less than or equal to the second gear and the first gear motor target speed f 21 (n 2 ), and the second gear is determined to be the first gear control. The process has not ended yet, returning to step 7; otherwise, when the motor speed n 1 of the second gear downshift control process is greater than the second gear down first gear motor target speed f 21 (n 2 ), it is determined that the second gear down first gear control process ends , return to step 1.
  2. 如权利要求1所述的电动汽车两挡线控自动变速器换挡介入控制方法,其特征在于,在所述步骤4一挡升二挡过程、步骤7二挡降一挡过 程控制中,所述换挡目标转速变化系数β是设定的一个固定值,β=0.95~1.05。 The shifting intervention control method for a two-speed remote control automatic transmission of an electric vehicle according to claim 1, wherein in the step 4, the second gear is shifted, the second gear is stepped, and the second gear is lowered. In the process control, the shift target rotation speed variation coefficient β is a fixed value set, β=0.95 to 1.05.
PCT/CN2017/086616 2016-11-22 2017-05-31 Gear shifting intervention control method for two-gear x-by-wire automatic transmission of electric car WO2018095006A1 (en)

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