Composite brake-by-wire system with four-wheel pressure independent control and brake control method thereof

Abstract

The invention discloses a composite drive-by-wire brake system and brake control method for independently controlling four-wheel pressure. Two electromechanical brake modules in the system are both electromechanical pressurizing units in signal connection with an electronic control unit, two electronic hydraulic brake modules are both connected with a brake main cylinder pipeline in a brake pedalmechanism, each electronic hydraulic brake module is composed of a normally open switch electromagnetic valve, an electronic hydraulic pressurizing unit, normally open linear electromagnetic valves and a brake wheel cylinder in series sequentially through pipelines, pressure sensors are arranged on a connecting pipeline of the brake wheel cylinder, the electromagnetic valves, the electronic hydraulic pressurizing units and the pressure sensors are all respectively in signal connection with the electronic control unit; the brake control method comprises a brake control method of an effective state of electrifying and a brake control method of a failure state of outage. The composite drive-by-wire brake system and brake control method for independently controlling four-wheel pressure can overcome the deficiency of a single line control system, can independently achieve rapid pressure buildup of four wheels and accurately control pressure, and have functions of failure braking and regenerative braking.

Description

technical field [0001] The invention belongs to the technical field of brake-by-wire systems for automobiles, and in particular relates to a composite brake-by-wire system with independent four-wheel pressure control and a braking control method thereof, especially suitable for intelligent electric vehicles or intelligent networked vehicles. Background technique [0002] With the increasing requirements for energy saving and environmental protection, new energy vehicles are developing rapidly. In the development process of new energy vehicles at this stage, people put forward higher requirements for the structure and function of the vehicle braking system under the premise of meeting the vehicle safety. The traditional automobile braking system is a vacuum-assisted hydraulic braking system that relies on a vacuum booster. When braking, it needs to rely on a vacuum booster to boost boost. At the same time, the vacuum-assisted hydraulic braking system contains many components....

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the defects in the above-mentioned prior art, and provides a composite brake-by-wire system with four-wheel pressure independent control and its brake control method. "To be combined to solve the shortcomings of the existing single electro-mechanical braking system or single integrated braking system

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