Vehicle speed control method and system used for electric vehicle

Abstract

The invention provides a vehicle speed control method used for an electric vehicle. The method specifically includes the steps that the target vehicle speed is obtained; the current vehicle speed of the vehicle is obtained; the early warning vehicle speed smaller than the target vehicle speed is set according to the target vehicle speed; and a response is made when the current vehicle speed exceeds the early warning vehicle speed, and the motor output torque of the vehicle is controlled to be reduced, so that the current vehicle speed of the vehicle is stabilized at the target vehicle speed. The invention further provides a vehicle speed control system capable of achieving the provided vehicle speed control method and the electric vehicle. The motor output torque is controlled so that thevehicle speed can be controlled, the vehicle speed is stabilized at an expected value, traveling safety can be guaranteed, and meanwhile the driving and riding experience feeling is not reduced.

Description

technical field [0001] The invention relates to a vehicle speed control method and a system thereof, in particular to a vehicle speed control method and a system of an electric vehicle. Background technique [0002] With the development of the automobile industry and the improvement of people's living standards, it has become very common to use automobiles as means of transportation. Especially, after the rise of the electric automobile industry, vehicles have become popular and the probability of traffic accidents has also increased. According to statistics, more than half of the traffic accidents that take place every year are caused by the speeding of the vehicle. In particular, due to the speeding, the kinetic energy of the vehicle is relatively large, which can easily cause major accidents and often cause very serious consequences. [0003] As the current electric vehicles are more and more perfect in terms of driving experience, when the road conditions permit, the roa...

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Problems solved by technology

[0005] As above, in order to solve the dangerous situation that the electric vehicle is likely to cause overspeed under the condition of continuous acceleration, the present invention provides a vehicle speed control method for the electric vehicle, which specifically includes: obtaining the target vehicle speed; obtaining the current vehicle speed of the vehicle; according to the target vehicle speed Set an early warning vehicle speed that is less than the target vehicle speed; in response to the current vehicle speed exceeding the early warning vehicle speed, reduce the motor output torque of the vehicle to stabilize the current vehicle speed at the target vehicle speed

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