Automobile braking method and system

Abstract

The invention provides an automobile braking method and system. The method comprises the following steps that normal stress condition models of front wheels and rear wheels of an automobile in the running state of the automobile are built; the method comprises the following steps: monitoring wheel loads in a running state of an automobile in real time, and constructing a road friction coefficient and locking braking force characteristic curve model; front wheel braking force and rear wheel braking force required under the real-time road friction coefficient are calculated; whether the front wheel braking force and the rear wheel braking force meet the front wheel locking prevention condition and the rear wheel locking prevention condition or not is judged, distribution of the front wheel braking force and the rear wheel braking force is adjusted according to the change of the automobile load and the real-time road adhesion coefficient value, and the situation that the rear wheels lock and brake the automobile ahead of the front wheels is prevented. The front and back change conditions of the axle load centroid of the automobile under two different conditions of no load and full load can be effectively adjusted, the distribution of front and back braking force is adjusted according to the change of the load and the adhesion coefficient value of the real-time road surface, and the stability of automobile braking is effectively maintained.

Description

technical field [0001] The invention belongs to the technical field of automobile braking control, and in particular relates to an automobile braking method and system. Background technique [0002] The car brake system is a mechanism used to force a moving car to decelerate or stop, to stabilize the speed of a downhill car, and to keep a parked car in place (including on a slope). With the rapid development of expressways, the increase of vehicle speed and the increasing density of traffic flow, in order to ensure driving safety, the working reliability of automobile braking system is becoming increasingly important. Only a car with good braking performance and reliable braking system can give full play to its dynamic performance. [0003] At present, many light-duty trucks in my country use drum brake structures on the front and rear axles, and there is no pressure adjustment device. The brake distribution coefficient remains unchanged at no-load and full-load. Considerin...

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Problems solved by technology

[0003] At present, many light trucks in my country adopt the structure of drum brakes on the front and rear axles, and there is no pressure adjustment device, and the brake distribution coefficient does not change between no-load and full-load , considering that the braking efficiency will not be too low, the synchronous adhesion coefficient value of the braking system is generally lower than the highest adhesion coefficient, that is, the adhesion coefficient value on the road surface. Braking in an emergency will cause the vehicle to be in a state where the rear wheels are locked first, which does not meet the requirements of braking stability and the front wheels are locked first, and it is a dangerous working condition

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