Hydraulic decoupling type electro-hydraulic braking system

Abstract

The invention discloses a hydraulic decoupling type electro-hydraulic braking system which comprises a pedal displacement sensor for collecting a stroke of a pedal assembly, wherein a first isolationvalve and a second isolation valve are respectively arranged on outlets of a first cavity and a second cavity of a master cylinder; the outlet of the first cavity of the master cylinder is connected with an inlet of a simulator control valve in parallel; a liquid storage tank is connected with the first cavity and the second cavity of the master cylinder, an active pressure buildup unit and a pedal feel simulator of the master cylinder are connected by a pipeline; a one-way valve is arranged on a parallel pipeline; a first hydraulic pressure sensor is arranged in the second cavity of the master cylinder; a second hydraulic pressure sensor is arranged at the outlet of the active pressure buildup unit; a self-check valve is arranged between the first cavity of the master cylinder and the outlet of the liquid storage tank; a first suction valve and a second suction valve are arranged at the outlet of the active pressure buildup unit in parallel; the pipeline where the first suction valveis located is connected between the first isolation valve and the ESC module; the pipeline where the second suction valve is located is connected between the second isolation valve and the ESC module;and an ECU controls the self-check valve, the first isolation valve, the second isolation valve, the first suction valve, the second suction valve, the simulator control valve and the active pressurebuildup unit.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to an automobile hydraulic decoupling electronic hydraulic braking system. Background technique [0002] With the promotion of new energy vehicles and the continuous advancement of vehicle chassis technology, the requirements for vehicle energy recovery and advanced driver assistance functions continue to increase. Due to the limitation of the non-decoupled mechanical structure, the traditional vacuum booster braking system has disadvantages such as large volume, unable to directly support energy recovery, unable to realize active braking, and unable to freely adjust the boost ratio. [0003] Therefore, in the past ten years, the electro-hydraulic braking system that overcomes the above-mentioned shortcomings of the vacuum booster has been gradually pushed to the market. Among them, Bosch IPB, Continental MK C1 and other integrated electro-hydraulic brake systems are representative. The...

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Problems solved by technology

However, the mechanical structures of these two products are too complicated to freely match ESC modules, and the cost is about 2 to 3 times that of traditional vacuum boosters.

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