Control method and device based on electric vehicle

Abstract

The invention provides a control method and device based on an electric vehicle (EV), wherein the EV is in a downhill state. The control method based on the EV comprises acquiring a current speed of the EV, calculating a negative torque according to the current speed and a target speed of the EV if the current speed is greater than the target speed, generating a torque command, and sending the torque command to a motor controller to cause a driving motor to output the negative torque under the control of the motor controller. Through the control method, the negative torque is outputted to the driving motor and the speed of the EV is reduced without a driver to continuously control a brake system for reducing the speed of the EV. The control method solves the problems in the prior art that when a vehicle needs to be decelerated, the driver needs to continuously control the brake system to obtain the target speed, which causes the fatigue of the driver and the overheating of the brake system caused by long-hour operation of the brake system thereby affecting the braking effect and the driving safety.

Description

technical field [0001] The invention relates to the technical field of vehicle engineering, in particular to a control method and device based on an electric vehicle. Background technique [0002] With the support of national policies and the advancement of electric vehicle technology, electric vehicles have gradually become popular, and more and more people have begun to choose electric vehicles as a means of travel. [0003] At present, compared with the mature technology of traditional fuel vehicles, the adaptability of electric vehicles to working conditions needs to be further developed and improved. Especially when the electric vehicle is driving downward on a long slope road, the speed of the vehicle is getting faster and faster under the action of its own weight, and the driver needs to keep stepping on the brake pedal to control the speed, but stepping on the brake for a long time will easily cause driver fatigue, and at the same time If the braking system works fo...

AI Technical Summary

Problems solved by technology

[0003] At present, compared with the mature technology of traditional fuel vehicles, the adaptability of electric vehicles to working conditions needs to be further developed and improved

Especially when the electric vehicle is driving downward on a long slope road, the speed of the vehicle is getting faster and faster under the action of its own weight, and the driver needs to keep stepping on the brake pedal to control the speed, but stepping on the brake for a long time will easily cause driver fatigue, and at the same time If the braking system works for a long time, it will cause overheating of the braking system, which will reduce the performance of the braking system and affect driving safety.

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