Automatic tire blowout control system and method based on safety braking

Abstract

The invention relates to an automatic transmission automobile tire burst control system and method based on safety braking. The control system comprises a central control unit, an engine control unit, an automatic transmission control unit and a brake system control unit, wherein the central control unit respectively transmits control commands to the engine control unit, the automatic transmission control unit and the brake system control unit. The control system further comprises a tire pressure monitoring device, a yaw velocity sensor and a single-chip microcomputer, the tire pressure monitoring device and the yaw velocity sensor respectively transmit the monitored tire pressure of each wheel and automobile yaw velocity to the single-chip microcomputer, and the single-chip microcomputer analyzes a tire state and uploads the tire state to the central control unit. By adding a brake pressure adjusting device, the braking force is adjusted according to the distance to an obstacle ahead and thus the goal of stably and quickly stopping the automobile during tire burst is realized.

Description

technical field [0001] The invention belongs to the field of automobile control, and in particular relates to a safety braking control system and method for an automatic transmission automobile when a tire blows out. Background technique [0002] At present, when a car is running, especially on a highway, if a wheel blows out (especially the front wheel), the direction will be out of control, rollover, etc., leading to serious traffic accidents, and even a series of car crashes. The tragedy brought huge losses to the family and society. According to the statistics of relevant departments, the number of deaths due to high-speed tire blowouts accounts for 50% of the death toll in expressway accidents in the world every year, and 70% of sudden traffic accidents on Chinese expressways are caused by car blowouts. In order to solve this problem, relevant scholars and technical personnel have carried out a lot of research, and have also achieved rich results, specifically the foll...

AI Technical Summary

Problems solved by technology

The first type is to change the tire structure, change the tire into a multi-tire structure, or install fillers on the hub inside the tire, even if a tire blows out, it will keep the vehicle running for a short time. The disadvantage of this type of patent is that the tire structure is complicated. If It is a multi-tire structure, and it will be difficult to ensure that the air pressure of each tire is equal, resulting in uneven wear of the entire tire; if fillers are installed on the wheel hub, it will also increase the moment of inertia of the wheel, and the dynamic balance will also need to be readjusted

The second type of patent is that when a tire blows out, the control device quickly punctures the other coaxial tire to ensure that the rolling radius of the two tires is the same and reduce vehicle deviation. The disadvantage of this type of patent is that the control is complicated , and when the tires are in good condition, when a wrong signal or wrong command occurs, the good wheel will be punctured, and a traffic accident will occur instead.

The third category is to quickly inflate the tire by detonating gunpowder when the tire is blown out. The disadvantages of this type of patent are that the weight of the wheel and the dynamic imbalance will be increased, and once the tire is blown out, it is difficult to maintain the balance of the vehicle by inflating it.

The fourth type of patent is that when a tire is blown out, the direction self-locking device is used to avoid the deviation of the vehicle. The disadvantage of this type of patent is that the rotation radius of the two coaxial wheels is different (after the tire is blown out). If the steering is locked, It will lead to deviation in one direction. This kind of technology is in the stage of superficial research, with few research results and no rescue function.

The fifth type of patent is that when a tire blows out, the control device sends the tire blowout signal to the central control unit to control the brakes until the car stops. The disadvantages of this type of patent are that the deceleration is too large and the direction stability of the car is not good

The sixth type of patent is that when a tire blows out, the speed of the radar is used to judge the distance of the vehicle behind, and then decide whether to brake. However, when a tire blows out, the collision accident is mainly in the front, not the rear

[0003] To sum up, the above-mentioned types of patents all have disadvantages. The correct way to deal with high-speed tire blowout should be: when the tire blows out, the driver should hold the steering wheel tightly, keep the direction stable, and then quickly grab "low gear" and use the engine to Brake until the vehicle speed drops. When the vehicle speed is high, if there is no emergency brake pressure adjustment device, do not step on the brake pedal

Although this is the case in theory, when a high-speed tire blowout occurs, it will be difficult for drivers (especially inexperienced drivers) to do this step, so most of the high-speed tire blowouts will cause major traffic accidents

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