Active collision-avoidance system based on novel solenoid valve controlling hydraulic braking and braking method

Abstract

The invention discloses an active collision-avoidance system based on novel solenoid valve controlling hydraulic braking and a braking method. The active collision-avoidance system comprises a braking pedal sensor, a braking pedal sensing simulator, a wheel speed sensor, an asymmetric hydraulic braking wheel cylinder, a solenoid operated four-way valve, an overflow valve, an oil tank, a hydraulic pump, an energy accumulator, an electronic control unit, a laser radar detection module and a buzzer. A braking master cylinder of a traditional hydraulic braking system is removed, the solenoid operated four-way valve is adopted to replace a complex braking valve, and a traditional braking wheel cylinder is changed into the asymmetric hydraulic braking wheel cylinder. Braking modes can be switched more rapidly by matching the asymmetric hydraulic braking wheel cylinder with the solenoid operated four-way valve, and pressurization, pressure maintaining and pressure reduction of the system can be achieved. The braking pedal sensor is adopted to discover a wrong braking behavior of a driver in time, a vehicle in the front is monitored through a radar system in real time, the distance, direction and relative speed between a vehicle and the vehicle in the front are judged, an alarm can be given if necessary, vehicle active collision avoidance can be achieved through control of an ECU, and it is guaranteed that the vehicle is driven safely.

Description

technical field [0001] The invention belongs to the technical field of vehicle braking, and in particular relates to an active collision avoidance system and a braking method based on novel electromagnetic valve-controlled hydraulic braking. Background technique [0002] With the increase of car ownership, traffic safety has become one of the most concerned issues, which is directly related to people's life safety and property loss. Traditional braking system control is just that the driver manipulates a set of simple mechanical devices to apply force to the brakes. In the case of a vehicle with a small mass and low speed, the mechanical brake can meet the vehicle braking requirements. With the increase of vehicle quality and vehicle speed, traditional mechanical brakes are far from being able to meet the vehicle's demand for high braking performance. According to the driver's fatigue state data, 70% to 90% of traffic accidents are caused by driver's operation error. If it...

AI Technical Summary

Problems solved by technology

Existing hydraulic braking systems include brake master cylinders, proportional valves, hydraulic valves, decompression valves, booster valves, etc., which are complex in structure, difficult to control, and relatively large in size and weight.

In addition, because the driver brakes incorrectly or does not brake, in high-speed collisions, traditional passive safety cannot effectively reduce the occurrence of accidents. More scholars have begun to study the concept of active safety.

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