Control method of double-loop electronic hydraulic braking system comprising two channels

Abstract

The invention discloses a control method of a double-loop electronic hydraulic braking system comprising two channels, and belongs to the field of electronic hydraulic braking control. An actuating mechanism of the electronic hydraulic braking system of each channel is a braking control module formed by a double-loop braking main cylinder, an ejector rod, a lever structure of the ejector rod, a motor, a transmission structure of the motor and the like. According to the whole vehicle braking system, the electronic hydraulic braking systems of the two channels are used for controlling oil pressure of braking wheel cylinders of wheel edge brakes acting on the two wheels on the left side and the two wheels on the right side of the vehicle respectively, then the braking torque of the wheels is controlled, and two sets of independent braking systems are formed. The electronic hydraulic brake system of each channel controls a brake master cylinder in a double-loop mode, and double liquid loops of front wheels and rear wheels on the same side of the vehicle are formed. In addition, the control system can simulate an ABS system during emergency braking, it is guaranteed that the vehicle always keeps good direction stability and operability during emergency braking, sideslip and deviation are prevented, and the safety performance of the vehicle during braking is improved.

Description

technical field [0001] The invention relates to the field of automobile electronic hydraulic brake control, in particular to a control method of a dual-circuit electronic hydraulic brake system including two channels. Background technique [0002] The rapid development of the "new four modernizations" has promoted the development of intelligent, electrified and networked vehicles, especially in the field of new energy vehicles and smart vehicles. Various network technologies, sensor technologies and computer technologies have been widely used and have become future vehicles. Important research areas for industry development. When a traditional fuel vehicle performs braking operation, the driver depresses the brake pedal, and the pedal will push the vacuum booster pump located at the working end of the master cylinder. The transmission rod generates additional drive to the brake master cylinder, pushes the brake master cylinder to generate hydraulic pressure, and then contro...

AI Technical Summary

Problems solved by technology

[0004] However, unmanned vehicles have become the future development trend, and the various wire-controlled hydraulic brake booster systems currently designed cannot achieve high braking effects

First of all, the various power-by-wire systems currently proposed do not have a completely reliable redundant design. When a part of them fails, the entire braking system will be in a failure state; secondly, the power of the various brake-by-wire devices currently proposed The source is single, and when the braking energy is recovered, the braking comfort cannot meet the driver's requirements

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