Non-clutch shift control method and control system of pure electric vehicle

A shift control, pure electric technology, applied in the direction of electric vehicles, vehicle components, electric traction, etc., can solve the problems such as deceleration and shifting, the impact of vehicle maneuverability, etc., and achieve the effect of improving maneuverability

Inactive Publication Date: 2008-12-17
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It can be seen that the existing technology cannot realize the shifting of electric vehicl

Method used

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  • Non-clutch shift control method and control system of pure electric vehicle
  • Non-clutch shift control method and control system of pure electric vehicle
  • Non-clutch shift control method and control system of pure electric vehicle

Examples

Experimental program
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Effect test

Example Embodiment

[0016] In the driving process of a pure electric vehicle, the power output of the driving motor is directly connected to the drive axle through a multi-speed reducer without a clutch, so as to realize a clutchless shift. The driver completely controls the speed of the vehicle through the accelerator, and the shifting process in the gearbox is completely automatically completed under the relevant control device of the vehicle.

[0017] During the working process of an electric vehicle, the electrical energy of the battery is converted into alternating current. According to the power required by the vehicle, the motor controller generates a corresponding current. The torque of the motor is decelerated and increased by the gearbox. According to the needs of the road, the automatic transmission system (AMT) controller generates corresponding control commands and selects different gears. The gearbox torque is transmitted to the vehicle's rear axle main reducer through the drive shaft. ...

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PUM

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Abstract

The invention provides a shift controlling method for a purely electric vehicle, and the method includes: a. the position of an accelerator pedal and the speed are detected; b. when the position of the accelerator pedal and the speed arrive at a shifting point, the rotate speed of a drive motor is regulated to an expected rotate speed and the position is selected while regulating the speed; c. after reaching the expected rotate speed, shift is carried out. The invention also provides a shift controlling system for a purely electric vehicle, and the system comprises: a pedal position detecting unit, a central controlling unit, a motor speed regulating unit, a position selecting device and a shifting device. The shift controlling method and system for purely electric vehicles can shift under the condition that the speed is not reduced, thus greatly improving the maneuverability of the vehicles and fully playing the efficiency of the electric motor.

Description

technical field [0001] The invention relates to the field of electric vehicle control, in particular to a clutchless shift control method and control system for pure electric vehicles. Background technique [0002] In the prior art, pure electric vehicles mostly use a second-speed mechanical transmission. Without a clutch, the shifting operation of the mechanical transmission needs to be completed when the vehicle speed is low. The speed of the shaft is reduced to reduce the speed of the vehicle, and then operations such as gear removal and speed change are performed. [0003] It can be seen that the prior art cannot realize gear shifting without deceleration while the electric vehicle is running, which will have a great impact on the maneuverability of the vehicle. Contents of the invention [0004] Aiming at the defects of the prior art, the present invention proposes a shift control method and control system, which can realize the shift operation without reducing the v...

Claims

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Application Information

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IPC IPC(8): B60W10/08B60W10/10B60L11/00B60W10/11
Inventor 席军强熊光明陈慧岩
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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