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

Abstract

The invention provides a wire-controlled hydraulic brake control system and its control method for automatic driving. The system includes a set of brake pedal operation modules, a set of hydraulic control modules, two sets of booster modules, and two sets of motor drive control modules. and a set of electronic control modules, the brake pedal operation module and the booster module are respectively connected to the hydraulic control module pipeline, two sets of booster modules realize redundant backup, the brake pedal operation module, booster module, motor drive control module, The hydraulic control modules are respectively connected to the electronic control module by signal, and the electronic control module is composed of two groups of electronic control sub-modules to realize redundant backup; the control method includes: the brake control method in the power-on state without failure, typical hardware failure The braking control method under the following conditions and the braking control method under the failure state of power failure. The present invention adopts a redundant architecture of multiple booster modules, multiple sensors and multiple electronic control modules to meet the requirements of high-level automatic driving for the braking control system.

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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