A multi-mode drive control method for pure electric vehicles

Abstract

The invention provides a multimode drive control method for a pure electric vehicle. The method comprises the steps that an overall vehicle controller judges the state of a driving mode of the vehicle, a torque parameter value is obtained by searching a function table through an input value in accordance with that different driving modes correspond to different function tables and input values of the function tables are current vehicle speed and openness of an accelerator pedal, and finally, a torque output value is determined by a product of the obtained torque parameter value and a peak torque value, which can be reached at a current revolving speed, of a motor. According to the method, through introducing a camber control strategy formulated through vehicle speed signals in various modes, the disadvantages resulting from the deficiency of torque of a rear segment of the driving motor are effectively avoided, the working interval of the driving motor is optimized, and the economical efficiency of the whole vehicle is increased.

Description

technical field [0001] The invention relates to the technical field of drive control of pure electric vehicles, in particular to a multi-mode drive control method of pure electric vehicles. Background technique [0002] Pure electric vehicles, as a new type of transportation that is pollution-free and can be configured in a variety of energy sources, have attracted widespread attention under the background that environmental and energy issues have become the focus of attention, and have been greatly developed. one of the important directions. [0003] Especially in electric vehicles, the rich functional configuration brought by the electronic control system has greatly improved the user's experience in controlling electric vehicles. Therefore, the widespread use of electronic control systems is an obvious trend in the development of automobiles. Among them, the driving mode option system allows the driver to electronically switch between sporty and comfortable features thro...

AI Technical Summary

Problems solved by technology

[0006] However, in the current control strategy, when the vehicle is in the starting condition and low-speed driving condition in the economic mode, the torque value is in the low-efficiency area of ​​the motor due to the small torque coefficient, which is not conducive to the improvement of the vehicle economy; In the power mode, since the torque coefficient of the motor at high speed does not change much and the external characteristics of the motor determine that the peak torque of the motor decreases with the increase of the speed, the response torque of the accelerator pedal will be insufficient when the vehicle is driving in the high speed area

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