Pure electric vehicle speed control method and pure electric vehicle speed control system
A vehicle speed control, pure electric technology, applied in electric vehicles, control drives, vehicle components, etc., can solve the problem that the motor drive system cannot work in real time
Active Publication Date: 2015-07-01
深蓝汽车科技有限公司
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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 problem that the motor drive system cannot work in the optimal working range in real time when facing changes in road conditions
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[0087] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0088] The invention provides a speed control method of a pure electric vehicle to solve the problem that a motor drive system cannot work in an optimal working range in real time when faced with changes in road conditions.
[0089] Specifically, such as figure 1 As shown, the pure electric vehicle speed control method includes steps:
[0090] S101. The vehicle controller receives the pedal angular displacement signal, the steering wheel angle signal φ, the f...
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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 invention relates to the technical field of driving control of electric vehicles, in particular to a speed control method and system for pure electric vehicles. Background technique [0002] At present, the wheels on both sides of pure electric vehicles driven by dual motors in the market are independently driven by the motors on the left and right sides. Only when the speed difference is high, the vehicle can achieve a certain radius of steering. [0003] In the prior art, the driving control of electric vehicles usually adopts a speed control strategy, 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 speed of the vehicle formed by the input signals of the accelerator pedal and the steering wheel and the speed difference between the wheels on both sides to realize the straight driving and steering o...
Claims
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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