Vehicle adaptive cruise control method, device and system and automobile

Abstract

The invention relates to a vehicle adaptive cruise control method, device and system and an automobile in order to solve a problem of too small vehicle following time headway caused by acceleration control overshoot and response delay during vehicle following. The vehicle adaptive cruise control method comprises the steps of obtaining an actual vehicle speed and an actual accelerated speed, an actual vehicle speed of a target vehicle in front of a vehicle, an actual vehicle following distance between the vehicle and the target vehicle and an expected vehicle following time headway input by a user; determining a target accelerated speed of the vehicle according to the actual vehicle speed of the vehicle, the actual vehicle following distance, the actual vehicle speed of the target vehicle and the expected vehicle following time headway input by the user; determining whether the vehicle is in a starting crawling vehicle following condition or not according to the actual accelerated speedand the target accelerated speed; if the vehicle is in the starting crawling vehicle following condition, calculating an accelerated speed reducing amount according to the actual accelerated speed and the target accelerated speed; and controlling a brake system of the vehicle to perform braking moment control according to the accelerated speed reducing amount.

Description

technical field [0001] The invention relates to the field of automobile electrical appliances, specifically a vehicle adaptive cruise control method, device, system and automobile. Background technique [0002] When the vehicle follows the vehicle with Adaptive Cruise Control (ACC) in the stop-and-go traffic condition, if the vehicle in front starts to crawl with a small acceleration, in order to ensure the timeliness of following the vehicle, the vehicle also needs to quickly follow the vehicle in front to start and crawl , but it is necessary to quickly and accurately control the actual acceleration of the vehicle to enter a reasonable error area near the target acceleration value, so as to avoid the following distance from the vehicle in front being too large or too small. Existing ACC control strategies control the acceleration value of the vehicle by separately controlling the net output torque of the engine during start creep acceleration. However, since the engine and...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a vehicle adaptive cruise control, device, system and automobile to solve the problem that the following time distance is too small due to acceleration control overshoot and response delay when the vehicle follows the vehicle

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