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A control system and control method for a two-speed automatic transmission of a pure electric vehicle

A transmission control and automatic transmission technology, which is applied in the field of electric vehicles, can solve problems such as inability to shift gears or large shift impact, and achieve the effects of shortening shift time, extending driving range, and small shift impact

Inactive Publication Date: 2011-12-28
CHONGQING CHANGAN AUTOMOBILE CO LTD +1
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AI Technical Summary

Problems solved by technology

[0003] The present invention proposes a control system and control method for a two-speed automatic transmission of a pure electric vehicle, which solves the problem that the traditional control method with a clutch is used in this system, and there will be problems in the process of shifting gears that cannot be shifted or that the shock of shifting is very large. big problem

Method used

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  • A control system and control method for a two-speed automatic transmission of a pure electric vehicle
  • A control system and control method for a two-speed automatic transmission of a pure electric vehicle
  • A control system and control method for a two-speed automatic transmission of a pure electric vehicle

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Embodiment Construction

[0038] In the present invention, since there is no clutch on the pure electric vehicle, when the pure electric vehicle is running normally, the power output of the drive motor is directly connected to the drive axle through the two-speed automatic transmission without passing through the clutch, and the driver controls the opening and closing of the accelerator pedal. To control the speed of the driving motor, and then control the speed of the vehicle. When the rotation speed of the drive motor does not match the current gear, the two-speed automatic transmission control system will shift gears through the set control method, so that the drive motor will work more in the high-efficiency area and extend the driving range of the pure electric vehicle .

[0039] figure 1 It is a schematic structural diagram of a two-speed automatic transmission control system for a pure electric vehicle. like figure 1 As shown, the control system includes a vehicle controller 1 , a drive motor...

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Abstract

The invention discloses a two-speed automatic transmission control system and control method for pure electric vehicles. The control system includes a vehicle controller, a drive motor controller, a transmission control module, and a gear selection actuator. It includes a gear selection motor, a gear shifting motor, a gear position sensor, an angular displacement sensor and a mechanical transmission part. The invention improves the transmission system of the traditional pure electric vehicle. The transmission adopts a two-speed structure, which can improve the performance of the electric vehicle, reduce the requirements on the performance of the motor, make the motor work more in the high-efficiency area, and extend its driving range. During the shifting process, the transmission control module automatically controls the gear selection and shifting actuator to realize automatic shifting and reduce the labor intensity of the operator; during the shifting process, the transmission control module, the vehicle controller and the drive motor controller Through the set control method, the working state of the drive motor is integratedly controlled, the speed of the drive motor is precisely controlled, the impact of shifting is small, and the smoothness of shifting and ride comfort of the vehicle are improved.

Description

technical field [0001] The invention relates to a two-speed automatic transmission control system and a control method of a pure electric vehicle, belonging to the field of electric vehicles. Background technique [0002] The traditional automatic transmission is equipped with a clutch, and the clutch is involved in the entire shifting process. The two-speed automatic transmission for pure electric vehicles involved in the present invention is a two-speed automatic transmission without a clutch. The drive motor and the gearbox are connected through splines, and the clutch is eliminated. Compared with the traditional mechanical automatic transmission, the structure is greatly simplified. , The shifting process also saves the separation and combination of the clutch, which shortens the shifting time, that is, reduces the power interruption time. After canceling the clutch, the control system becomes relatively complicated during the shifting process, and it is necessary to pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W10/10B60W10/08B60W30/00B60W40/08
Inventor 胡建军杜昌松李康力殷杰胡明辉高龙何铮斌
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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