Unmanned vehicle brake system for achieving double-loop brake

Abstract

The invention provides an unmanned vehicle brake system for achieving double-loop brake. The unmanned vehicle brake system is mainly composed of a manual brake loop, an electric brake loop, a three-way control valve and a brake pipeline Z. A brake pedal on the manual brake loop is connected with an assistance device through a control valve. The assistance device is connected with the control end of a main brake cylinder R through a main brake cylinder pushing rod R. An oil inlet of the main brake cylinder R is connected with a liquid storage tank R. An oil outlet of the main brake cylinder R is connected with a brake pipeline R. An electric control module on the electric brake loop is connected with the control end of a main brake cylinder D through a main brake cylinder pushing rod D. An oil inlet of the main brake cylinder D is connected with a liquid storage tank D. An oil outlet of the main brake cylinder D is connected with a brake pipeline D. The brake pipeline R and the brake pipeline D are connected with a three-way control valve. An oil outlet of the three-way control valve is connected with a brake controller through the brake pipeline Z. The brake controller is connected with a wheel side brake assembly of a vehicle.

Description

technical field [0001] The invention relates to a braking system for an unmanned vehicle for realizing dual-circuit braking, and belongs to the technical field of vehicle design. Background technique [0002] Unmanned vehicle challenges have been held at home and abroad, such as the Urban Challenge (Urban Challenge) held by DARPA (U.S. Defense Advanced Research Projects Agency) and the "Smart Vehicle Future Challenge" held by China. They are all researching unmanned vehicles, such as Mercedes-Benz S500 INTELLIGENT DRIVE, Google's unmanned vehicles, Nissan's electric self-driving vehicles, etc. However, in the research of unmanned vehicle technology at home and abroad, most of them are modified by adding external mechanisms to traditional vehicles. This method applies the instructions of the upper decision-making system to the external organization, which will lead to the incompatibility between the additional control system and the original control system of the car, making ...

AI Technical Summary

Problems solved by technology

[0004] (1) The electric control brake modification at the brake pedal and the manual brake use the same actuator, which may cause interference between the two actions;

[0005] (2) The control accuracy of the motor pulling the cable to drive the brake pedal movement is not high, which is not conducive to the further research of the longitudinal control algorithm;

[0006] (3) When the brake system is depressurized, the brake pedal needs to overcome the resistance of the motor to return. When the brake pedal moves repeatedly, the point of the brake pedal’s return cannot be guaranteed to remain unchanged each time, and calibration is difficult;

[0007] (4) The transmission route of the brake system is long, which cannot fully reflect the characteristics of "fast response and precise control" of the electronic control system

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