Creep control method and device for electric automobile and electric automobile

Abstract

The invention provides a creep control method and device for an electric automobile and the electric automobile. The method comprises the following steps of: acquiring an angle between an electric automobile body and a preset horizontal plane, the acceleration and the speed of the electric automobile and an output torque of a drive motor; working out a demand output torque of the drive motor by taking the angle, the acceleration and the speed as control parameters by adopting a creep control model established in advance; generating control information according to the difference value between the output torque and the demand output torque of the drive motor, wherein the control information corresponds to the difference value; and sending the control information to a drive motor controller so as to enable the drive motor controller to control the drive motor according to the control information to enable the output torque of the drive motor to be the demand output torque. According to the creep control method and device for the electric automobile, the creep control of the electric automobile is realized. The creep control method and device for the electric automobile can be used for effectively assisting a driver to stably start and simplifying a start action, and downslope speed auxiliary control is added, so that the driving comfort and the driving safety of the electric automobile are further improved.

Description

technical field [0001] The invention relates to automobile electrical control technology, in particular to an electric vehicle creep control method and device and the electric vehicle. Background technique [0002] Electric vehicles use a drive motor instead of the engine of existing internal combustion-powered vehicles. The drive motor itself has a strong drive and flexible speed change function, so when designing an electric vehicle, a reduction device can be used to replace the gearbox of a traditional car. The variable speed capability of the drive motor is more efficient and convenient, and its energy utilization rate is also beyond the reach of traditional gearboxes. [0003] Most of the automatic transmissions of traditional internal combustion engine vehicles have a creep function, which provides convenience for the driving of the vehicle. Among them, creep control refers to: when the vehicle is started, the brake pedal, hand brake and accelerator pedal of the vehi...

AI Technical Summary

Problems solved by technology

However, the existing electric vehicles cannot use the existing automatic transmission to realize the creep control function because they do not have an automatic transmission.

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