Forward collision avoidance method and system based on electro-hydraulic braking

Abstract

The invention relates to the technical field of electronic hydraulic braking, in particular to a forward collision prevention method and system based on electronic hydraulic braking. The method includes the steps that an environment perception unit acquires and outputs environment information to a danger judgment unit; the danger judgment unit computes the pre-collision time t and judges and sends the danger level of collision to an electronic control unit; the electronic control unit sends an alarm and / or brake command to an execution unit according to the different danger levels; and the execution unit conducts alarming and / or braking according to the command. Based on an electronic hydraulic braking system, the response speed is high. According to the different danger levels, a danger alarm is given to a driver; and when the danger level is high or extremely high, a horn system can be controlled to give pedestrians a prompt that the danger exists, so that the safety of the pedestrians around vehicles is guaranteed.

Description

technical field [0001] The invention relates to the technical field of electronic hydraulic braking, in particular to a forward collision avoidance method and system based on electronic hydraulic braking. Background technique [0002] Electronic Hydraulic Brake (EHB for short) and vehicle forward collision avoidance system are important components of active safety technology. As one of the representative products of brake-by-wire, the EHB system has the characteristics of good controllability and fast response. It mainly includes a brake pedal unit, an electronic control unit ECU (integrated with a pressure control unit HCU), and a series of sensors. The hydraulic connection between the brake pedal and the brake is disconnected. The form is transmitted to the electronic control unit to drive the hydraulic actuator to complete the optimal braking operation. Due to the rapid transmission of electrical signals, the pressure building time is greatly shortened, the braking dist...

AI Technical Summary

Problems solved by technology

What's more, if the driver's attention is not concentrated or the operation is wrong, the danger is still unavoidable.

The reason is that the EHB system cannot monitor the existence of danger in real time and make corresponding braking actions when the driver has no time to respond or makes an operation error, so that the occurrence of danger cannot be fundamentally avoided.

[0004] The traditional vehicle forward collision avoidance method, on the one hand, only issues a collision warning when the danger level is high, usually a simple light flashing or buzzer, which transmits relatively little information; on the other hand, the traditional forward collision avoidance The collision method only considers the early warning of the driver, and does not give early warning to the pedestrians around the vehicle

However, the traditional forward anti-collision system is limited by the structure and principle of the traditional braking system, the reaction speed is limited, there is a large error in the control of the timing of intervention, the brake cannot be implemented in time, and the safety is low

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