An Active Braking System Realizing Automatic Emergency Braking

Abstract

The invention provides an active braking system capable of realizing autonomous emergency braking. The active braking system comprises a high-pressure oil supply unit and a dual-channel braking wheel cylinder. The high-pressure oil supply unit is connected to the braking wheel cylinder through an active braking pipeline and a conventional braking pipeline. The active braking pipeline is provided with a second switch solenoid valve and a one-way valve. The conventional braking pipeline is provided with an anti-lock braking system. An oil storage cup is connected between the high-pressure oil supply unit and the anti-lock braking system through a pipeline and mounted on the top of a braking master cylinder. The active braking pipeline and the braking wheel cylinder are each provided with a hydraulic signal collector. A first oil hole and a second oil hole are formed in the braking wheel cylinder. The second oil hole and a first switch solenoid valve are integrated in the braking wheel cylinder. The anti-lock braking system comprises a three-position three-way solenoid valve. The first switch solenoid valve, the second switch solenoid valve, the three-position three-way solenoid valve and the hydraulic signal collectors are connected with a braking controller. The response time of the active braking system can be shortened, and the emergency braking performance is thus improved.

Description

technical field [0001] The invention belongs to the field of vehicle emergency braking, in particular to an active braking system for realizing automatic emergency braking. Background technique [0002] When the automatic emergency braking system AEB (Autonomous Emergency Braking) detects that there may be a collision risk in front of the vehicle, it will send an early warning to the driver through sound, image, vibrating seat, shaking the steering wheel, etc., reminding the driver to take measures to avoid the collision; As the danger level increases, if the driver fails to respond correctly to the warning signal in time, the system will start to automatically brake with a certain braking force, and remind the driver while reducing the speed; when the collision risk becomes very urgent or the collision When avoidance is unavoidable, the system mitigates the severity of the collision by automatically applying full braking. [0003] Chinese patent (CN106347334A) discloses a ...

AI Technical Summary

Problems solved by technology

This solution is to use the servo motor to replace the human stepping on the brake pedal to achieve active braking without changing the structure of the traditional braking system. There is a certain delay from the pedal to the brake force rise, which leads to a slower response time of the whole system

[0005] Due to the delay in sensor tracking and signal processing, system judgment and decision-making, and brake action, there will be a certain delay in the current AEB system from the detection of a collision risk to the start of automatic braking. During emergency braking, the delay caused by such a system often makes a vehicle collision unavoidable

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