Double-loop automatic braking system with failure redundancy function and braking method

Abstract

The invention provides a double-loop automatic braking system with a failure redundancy function and a braking method. The system comprises an electric cylinder, a braking pipeline, an energy storagedevice, a braking controller, a power source, a fault indicating lamp and the like. Through the mode of arranging two electro-hydraulic automatic braking loops which are mutually independent and redundant to brake two wheel brakes respectively, the reliability of the braking system is improved. Moreover, through the arrangement of the energy storage device, an unmanned vehicle is normally braked,and the device depends on a motor to output torque to compress springs for storing energy; when a power source of the whole unmanned vehicle gets fails due to breakdown, the motor of the device cannotoutput torque when power supply cannot be achieved, residual braking liquid of an oil cylinder is squeezed under the effect of return force of the compression springs, and braking pressure is generated to achieve braking. The double-loop automatic braking system has the advantages that an operating device is braked without the assistance of manual labor, the braking response is quick, the systemstructure is simple, the reliability is high, the cost is low, and the system meets the requirement for braking during failure of automatic braking.

Description

technical field [0001] The invention belongs to the technical field of braking systems of automatic driving vehicles, and in particular relates to a dual-circuit electro-hydraulic autonomous braking system capable of realizing autonomous braking failure redundancy. Background technique [0002] Automobile braking system is closely related to automobile driving safety. The automobile braking system generally adopts a dual-circuit structure independent of each other to ensure that when one circuit fails and the other circuit can still continue to function as a brake, the reliability of the service brake is improved. With the development of unmanned vehicles, the autonomous braking required by intelligent vehicle systems such as advanced driver assistance systems (ADAS) and automatic driving systems (ADS) (the so-called "autonomous braking" refers to the The brakes applied to some or all of the wheels in the case of pedals) The market demand is becoming more and more obvious, ...

AI Technical Summary

Problems solved by technology

[0004] However, the brake-by-wire system relies heavily on the power supply of the car. Once the power supply fails or is out of power, the autonomous braking system will fail. At this time, the vehicle still has a certain speed, which will cause serious traffic accidents.

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