Braking early warning and control method and system for vehicle and vehicle

Abstract

The invention provides a braking early warning and control method and system for a vehicle and the vehicle. The method comprises the steps that real-time dynamics data in the vehicle driving process is acquired, wherein the real-time dynamics data comprises one or more of a current road adhesion coefficient, a real-time load of wheels, a real-time temperature of a friction sheet and a braking disc, vehicle body data, a real-time vehicle speed and mass center position change information; according to the real-time dynamics data, real-time braking data is determined, wherein the real-time dynamics data comprises one or more of a maximum safety braking deceleration during emergent braking of the vehicle, a safety braking distance and a pipe hydraulic limit value required by braking; a real-time distance of the vehicle and the front vehicle is acquired; according to the real-time distance of the vehicle and the front vehicle and the real-time braking data, braking early warning and brakingcontrol are conducted. According to the braking early warning and control method, effective braking early warning and precise braking control can be conducted in the vehicle driving process, the stability and reliability of vehicle braking are improved, and accordingly the driving safety is improved.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a vehicle braking early warning and control method, system and vehicle. Background technique [0002] Automobile is one of the most common means of transportation in the current human social life. With the rapid development of the automobile industry, the road traffic safety situation is becoming more and more severe. Traffic accidents occur frequently, and most of them are heavy and extraordinarily serious. Accidents account for the majority, especially rear-end collisions on highways. And rear-end collision accidents are mostly due to the emergency braking of the vehicle in front, and the rear vehicle cannot be quickly informed and judged and processed in time. In the case of emergency braking, the thinking time of the vehicle behind is extremely short, and a judgment must be made in time to ensure the driving safety of the vehicle to the greatest extent. Therefore, the safe...

AI Technical Summary

Problems solved by technology

However, when the actual vehicle is running, the adhesion coefficient of the real-time road surface will continue to change, and the continuous braking of the vehicle will cause the temperature of the brake disc to rise continuously, and the friction coefficient of the friction plate will decrease with the increase of temperature. If the brake control is still performed according to the hydraulic threshold value of the calibrated adhesion coefficient road surface, it will lead to braking instability

[0004] In addition, on roads with low road surface adhesion coefficient, due to the influence of road surface adhesion coefficient, AEB (Autonomous Emergency Braking, automatic braking system) cannot make the braking deceleration of the car reach the braking deceleration of the high adhesion road surface. Braking at the corresponding warning distance and safety distance threshold on the road surface with high adhesion coefficient will also cause the braking to be too late, and it may not be possible to avoid the car colliding with the car in front or the obstacle

Moreover, the current braking control method does not consider the change of the actual distance between the vehicle and the vehicle in front, and does a good brake early warning and alarm prediction in advance, resulting in low braking stability and reliability, resulting in reduced driving safety

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