An Electro-hydraulic Braking System with Reduced Liquid Outlet of Master Cylinder

Abstract

An electro-hydraulic braking system that reduces the liquid outlet of a master cylinder, including: a brake pedal and a pedal displacement sensor connected to the pedal; a secondary master cylinder with two through holes, the front through holes are directly connected to the reservoir The liquid tank is connected, and the rear end through hole is connected to two passages, one of which is connected to the pedal feeling simulator, and the other is connected to the front chamber of the master cylinder through the decoupling solenoid valve; at the same time, the left end of the secondary master cylinder piston is directly connected to the brake pedal , the right end is opposite to the central push rod of the electronically controlled linear motion module, and there is a gap; for the electronically controlled linear motion module, there is a push rod in the hollow part of the whole module, which drives the transmission mechanism through the motor to drive the push rod to move, thereby pushing the piston of the master cylinder The right end of the push rod is opposite to the first piston of the master cylinder, and there is a gap; the present invention has the characteristics of fast response, precise control of brake fluid pressure, better simulation of the driver's brake pedal feeling, and maximum recovery of braking energy. Contains dual fail-safe modes for high safety and reliability.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and relates to automobile braking technology, in particular to an electronic hydraulic braking system driven by a motor. Background technique [0002] Due to the depletion of oil and the destruction of the environment, the advantages of energy saving and environmental protection make electric vehicles the main direction of the future development of the automobile industry. In order to improve energy utilization, save resources, and protect the environment, the automobile industry of various countries is vigorously developing electric vehicles. Due to the limitations of motor and battery technology, the two problems of short driving range and high cost of electric vehicles hinder the development of electric vehicles. popularization and commercialization. [0003] The current electro-hydraulic braking systems, such as Bosch's HAS hev system and TRW's SCB system, generally actively control the ...

AI Technical Summary

Problems solved by technology

However, the high-pressure accumulator technology is still immature, and there are still hidden dangers in reliability and safety. In addition, the addition of multiple solenoid valves also increases the difficulty of control and the risk of failure

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