Vehicle control method and system

Abstract

The invention provides a vehicle control method and system. The method comprises the following steps of: acquiring a maximum deceleration provided by a road surface on which a current vehicle is located; acquiring first data including a relative speed and / or a time interval between a target vehicle and the current vehicle, wherein the target vehicle is a vehicle which is located in front of the current vehicle and closest to the current vehicle; judging whether the target vehicle is in a braking state or not according to the first data; acquiring a target deceleration required by the current vehicle when the target vehicle is in the braking state; according to the maximum deceleration and the target deceleration, judging whether the current vehicle has a rear-end collision risk; and when the rear-end collision risk exists, controlling the current vehicle to perform decelerating, braking and steering at the maximum deceleration. According to the method disclosed by the invention, the maximum deceleration provided by the road surface on which the current vehicle is located and the required target deceleration are used as a basis for judging whether the rear-end collision risk exists, and the problems of poor control effect and low safety caused by that adhesion conditions of the road surface are not considered in an existing ACC control process are solved.

Description

technical field [0001] The invention relates to the field of vehicle engineering, in particular to a vehicle control method and system. Background technique [0002] At present, compared with traditional vehicles, pure electric vehicles reduce emissions and reduce water pollution caused by oil leakage. Therefore, pure electric vehicles are becoming more and more popular among consumers. [0003] Adaptive Cruise Control (ACC) controls the safe driving of the vehicle, which can effectively relieve the driver's driving fatigue and ensure the safe driving of the vehicle. During the running of the vehicle, when the distance between the vehicle in front and the vehicle in front is too small, ACC can make the wheels brake properly and reduce the output power of the engine by coordinating with the anti-lock braking system and the engine control system, so that Always keep a safe distance between the vehicle and the vehicle ahead. At present, adaptive cruise systems are widely use...

AI Technical Summary

Problems solved by technology

[0006] For this reason, the first object of the present invention is to propose a vehicle control method to realize the maximum deceleration that can be provided by the road surface where the vehicle is located and the target deceleration required by the vehicle to determine whether the vehicle has a rear-end collision risk. To solve the problem that the existing vehicle control method does not consider the road surface adhesion conditions, resulting in poor control effect and low vehicle safety

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