Self-adaptive cruise low-speed vehicle following control method and device and vehicle

Abstract

The invention discloses a self-adaptive cruise low-speed vehicle following control method and device and a vehicle. The method comprises the following steps: in an adaptive cruise mode, if it is identified that a current vehicle is in a non-pure electric drive mode and a current road slope value is less than or equal to a first slope threshold, taking a larger value of a starting cruise torque anda creeping torque as a cruise demand torque. According to the invention, the self-adaptive cruise working condition is selected based on a driver; by combining different driving modes and gradient road conditions, a low-speed vehicle following control strategy is optimized, the working condition of starting vehicle following at the gradient of 0-15% can be achieved, the comfort of the low-speed vehicle following starting working condition is optimized, the comfort of self-adaptive cruise low-speed driving is improved, and the NVH of low-speed vehicle following starting under the whole-road working condition is good.

Description

technical field [0001] The present invention relates to the technical field of vehicles, in particular to an adaptive cruise low-speed follow-up control method, device and vehicle applied to hybrid vehicles. Background technique [0002] Adaptive Cruise Control (hereinafter referred to as ACC) is an intelligent automatic control system whose control target is the speed set by the driver. The ACC system can automatically switch between car-following cruise and constant-speed cruise according to whether there is a car ahead. The gap or time gap of the vehicle to achieve follow-up cruise; and if the ACC system detects that the vehicle in front is not on the road where the vehicle is driving, it will speed up the vehicle to return to the previously set speed to achieve constant-speed cruise . Because the ACC system can reduce the driver's fatigue intensity and bring great driving entertainment and other advantages, it is more and more popular among drivers. [0003] In road c...

AI Technical Summary

Problems solved by technology

This control strategy will cause NVH problems when the engine is started, and the engine speed rises higher especially under slope conditions. Such a low speed and high engine speed will bring a bad experience to the user, and the overall comfort and smoothness bad

[0004] In addition, most of the existing adaptive cruise systems are used in traditional vehicles and pure electric vehicles, while adaptive cruise systems are rarely used in hybrid vehicles

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