Drive-by-wire hydraulic brake control system for automatic driving and control method thereof

Abstract

The invention provides a drive-by-wire hydraulic brake control system for automatic driving and a control method thereof. The system comprises a group of brake pedal operation modules, a group of hydraulic control modules, two groups of pressurization modules, two groups of motor driving control modules and a group of electronic control modules, the brake pedal operation module and the pressurization module are connected with the hydraulic control module through pipelines. The two groups of pressurization modules realize redundant backup, the brake pedal operating module, the pressurization modules, the motor driving control module and the hydraulic control module are respectively in signal connection with the electronic control module, and the electronic control module consists of two groups of electronic control sub-modules to realize redundant backup; the control method comprises a brake control method in a power-on failure-free state, a brake control method in a typical hardware failure state and a brake control method in a power-off failure state. The redundant architecture of the multiple pressurization modules, the multiple sensors and the multiple electronic control modulesis adopted, and the requirement of high-level automatic driving for a brake control system is met.

Description

technical field [0001] The invention belongs to the technical field of brake-by-wire for intelligent electric vehicles or intelligent networked vehicles, and in particular relates to an automatic-driving-oriented hydraulic brake-by-wire control system and a control method thereof. Background technique [0002] With the current development of intelligent networked vehicle technology, the automatic driving functions of L1 and L2 levels of new energy vehicles have become more and more mature, and the automatic driving technology of L3 level and above is gradually being developed. Brake-by-wire systems have initially begun to be explored. The brake-by-wire brake system for automatic driving at level L3 and above needs to be able to realize redundant control of the brake system, that is, after the brake system fails, the brake system can still ensure that the vehicle has good braking performance, and at the same time The system also needs to meet the requirements of various work...

AI Technical Summary

Problems solved by technology

[0004] In the above scheme, when the motor and the transmission mechanism fail to be used, the motor pump is used for redundancy, but the motor pump is limited by the current technology, and it cannot be used for a long time, and the above configuration has a hydraulic shock when the brake is decompressed The generated vibration is transmitted to the vehicle's front cabin fender, and the driver can easily perceive the vibration, which affects the driver's feeling

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