Pure electric vehicle speed control method and pure electric vehicle speed control system

A pure electric, vehicle controller technology, applied in the direction of electric vehicles, control drive, vehicle components, etc., can solve the problem that the motor drive system cannot work in real time

Active Publication Date: 2013-06-05
深蓝汽车科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a pure electric vehicle speed control method and system to solve the pr

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  • Pure electric vehicle speed control method and pure electric vehicle speed control system
  • Pure electric vehicle speed control method and pure electric vehicle speed control system
  • Pure electric vehicle speed control method and pure electric vehicle speed control system

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Embodiment Construction

[0087] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0088] The invention provides a speed control method for a pure electric vehicle to solve the problem that the motor drive system cannot work in the optimal working range in real time when the road conditions change.

[0089] Specific, such as figure 1 As shown, the speed control method of the pure electric vehicle includes the steps:

[0090] S101. The vehicle controller receives the pedal angle displacement signal, the steering wheel angl...

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Abstract

The invention provides a pure electric vehicle speed control method and a pure electric vehicle speed control system. Signals input by a driver through a pedal and a steering wheel, outer side motor feedback rotation speed signals and inner side motor feedback rotation speed signals are received through a vehicle control unit, a maximum torque Tmax (n1) of an outer side motor is determined according to the outer side motor feedback rotation speed signals, and a maximum torque Tmax (n2) of an inner side motor is determined according to the inner side motor feedback rotation speed signals; followingly, an outer side motor target torque T1 and an inner side motor target torque T2 are obtained through the signals; a vehicle dynamical model obtains a straight travel average vehicle speed v and a vehicle yaw velocity w through the outer side motor target torque signal T1, the inner side motor target torque signal T2, vehicle outer side drive rolling resistance Fr1, vehicle inner side drive rolling resistance Fr2 and vehicle steering resisting moment Mz; and the obtained straight travel average vehicle speed v and the vehicle yaw velocity w are obtained by reference to pavement load variations, and the capability of an electric drive system can also be brought into full play to be enabled to work in an optima state.

Description

Technical field [0001] The present invention relates to the technical field of driving control of electric vehicles, and in particular to a method and system for speed control of pure electric vehicles. Background technique [0002] Currently on the market, the wheels on both sides of a pure electric vehicle driven by dual motors are independently driven by the left and right motors. Only when the speeds of the motors on both sides are the same and the speed difference is zero, the vehicle can keep straight, while the motors on both sides keep constant. The vehicle can only achieve a certain radius of steering when the speed difference is high. [0003] The prior art generally adopts a speed control strategy for driving control of electric vehicles, that is, the accelerator pedal input signal is defined as a given speed signal, and the steering wheel input signal is defined as a speed difference signal. The driving of the vehicle depends on the vehicle speed formed by the input si...

Claims

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Application Information

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IPC IPC(8): B60L15/00
Inventor 陈平薛山陈树勇陆中奎
Owner 深蓝汽车科技有限公司
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