Redundant braking system for automatic driving of vehicle and braking method thereof

Abstract

The invention relates to a redundant braking system based on vehicle automatic driving and a braking method thereof. The system comprises a main controller, a first controller, a second controller and a third controller, the main controller is connected with the first controller, the second controller and the third controller, the first controller is used for controlling the hydraulic mechanism and the third controller according to a braking request sent by the main controller so as to brake the vehicle; the second controller and the third controller respond to the braking request of the main controller respectively, and braking of the vehicle is achieved by controlling a parking braking mechanism and/or a driving motor of the vehicle. On the basis that a braking backup unit is not added, the electronic parking and the driving motor are adopted to meet the braking redundancy requirement, the parking braking system serves as a part of service braking redundancy, multiple braking redundancy is formed, the service braking redundancy and the parking braking redundancy are met at the same time, and the utilization rate of the braking system is increased.

Description

technical field [0001] The invention belongs to the field of vehicle automatic driving and control, and in particular relates to a redundant braking system for vehicle automatic driving and a braking method thereof. Background technique [0002] With the development of automobile technology, affected by the new four modernizations and the concept of software-defined automobiles, automobiles are gradually developing in the direction of electrification and intelligence, and this trend is generally considered to be the main direction of future automobile development. With the development of intelligent electric vehicles, automatic driving is the key development direction and main selling point of major OEMs. At present, the level of automatic driving is mainly concentrated at the L2 level. The requirements for longitudinal and lateral systems such as braking and steering are gradually increasing. Functions such as APA, RPA, ACC, and AEB require the braking system to have a redu...

AI Technical Summary

Problems solved by technology

[0004] The redundancy scheme of the existing braking system mainly realizes the redundancy requirement by adding an additional controller, and therefore adds more parts such as wiring harnesses and pipelines, which not only brings challenges to the layout of the whole vehicle, but also increases the number of pipelines and joints. The increase of other parts also increases the risk of failure, and the cost of the whole vehicle also rises sharply

In addition, under the current braking system redundancy scheme, the service brake redundancy and the parking brake redundancy are completely independent, and the utilization rate of the braking system is low.

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