An energy-saving electronic hydraulic braking system and its control method

Abstract

The invention discloses an energy-saving electronic-hydraulic braking system and a control method thereof. The energy-saving electronic-hydraulic braking system comprises a high-pressure fluid supply source and a low-pressure fluid supply source. The high-pressure fluid supply source comprises a high-power motor, a high-pressure pump and a high-pressure accumulator. The low-pressure fluid supply source comprises a low-power motor and a low-pressure pump. At the braking idle stroke stage, the low-power motor drives the low-pressure pump to inject fluid into a wheel cylinder, a piston pushes a friction plate to make contact with a brake disc, and no braking torque is generated; at the braking action stage, a low-speed electromagnetic valve is started, brake fluid in the high-pressure accumulator enters the wheel cylinder, the piston continues to be pushed to enable the friction plate to compress the brake disc, and braking torque is generated. According to the energy-saving electronic-hydraulic braking system, the quantity of fluid discharged from the high-pressure accumulator in a one-shot braking process is reduced, energy consumption of an automobile in the braking process is reduced, and the size of the high-pressure accumulator is decreased.

Description

technical field [0001] The invention relates to the technical field of energy saving of new energy vehicles, in particular to an energy-saving electronic hydraulic braking system and a control method thereof. Background technique [0002] The existing braking system has problems such as slow response of braking force, low braking force control precision, and inability to meet the requirements of braking performance under emergency braking. As drive-by-wire technology is gradually introduced into vehicle design and development, electronic hydraulic braking systems have emerged due to their advantages. The electronic hydraulic brake system is composed of electronic brake pedal, hydraulic control unit, electronic control unit and other parts. The brake hydraulic pressure in the wheel cylinder is no longer generated by the driver's pedal force driving the brake master cylinder, but the electronic control unit controls the high-speed solenoid valve in the hydraulic control unit ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of large energy consumption during braking of the traditional electronic hydraulic braking system and the large volume of the high-pressure accumulator to ensure the safety of the system, and provides an energy-saving electronic hydraulic braking system and its According to the control method, the electronic hydraulic braking system can save the braking energy consumption of the automobile, reduce the installation size of the electronic hydraulic braking system, and make it more convenient to install on the automobile

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