Electric vehicle cruise control method and system, vehicle, controller and storage medium

Abstract

The invention relates to an electric vehicle cruise control method and system, a vehicle, a controller and a storage medium. The method comprises the following steps: receiving a cruise starting request or a cruise recovery request, wherein the cruise starting request comprises a cruise target vehicle speed V1; if the vehicle conforms to the cruise setting condition, detecting a current vehicle speed V, setting an intermediate vehicle speed V2 between the cruise target vehicle speed V1 and the current vehicle speed V according to the cruise target vehicle speed V1 and the current vehicle speedV, then calculating a difference value between the current vehicle speed V and the intermediate vehicle speed V2, and obtaining a final cruise torque based on the difference value and a set initial torque; and adjusting the motor output torque of the electric vehicle according to the final cruise torque to drive the vehicle to cruise. The cruise control torque can be effectively prevented from fluctuating, it is guaranteed that cruise driving of the whole vehicle is smoother, and the driving experience of a user is improved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a cruise control method for an electric vehicle, a cruise control system for an electric vehicle, a vehicle, a controller and a storage medium. Background technique [0002] Cruise control is a function that activates the cruise function by the user operating the cruise control switch in order to release the accelerator pedal and keep the vehicle running at a certain speed. As a basic function of vehicles, cruise control has basically matured in traditional gasoline vehicles. With the advancement of science and technology and social development, various types of new energy vehicles such as electric vehicles and hybrid vehicles are increasingly widely used, and research on cruise control for such vehicles has attracted much attention in recent years. [0003] Throttle torque is the initial torque used to maintain the cruise target vehicle speed when cruise control is activate...

AI Technical Summary

Problems solved by technology

[0004] However, in practical applications, there are many factors that will affect the effect of vehicle cruise control, especially the existing cruise control methods cannot guarantee that the vehicle speed is stable at the cruise target speed, and it is difficult to satisfy the user's good driving experience

For example, if the initial torque of the cruise torque is the throttle torque, the vehicle speed will continue to accelerate when entering the cruise control during acceleration; the change of the road gradient will cause the cruise torque to change drastically, thereby affecting the smoothness of the torque output; when the vehicle stops cruising, save When cruising the vehicle speed and returning to cruising at a low speed, it will cause the vehicle to accelerate rapidly; requesting the motor torque during cruise control, if the cruise PID control torque is adjusted according to the target torque, it will easily cause the vehicle to shake

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