Electromobile energy feedback braking and ABS (Anti-skid Brake System) integration hydraulic pressure unit

Abstract

The invention discloses an electromobile energy feedback braking and ABS (Anti-skid Brake System) integration hydraulic pressure unit. The input end of a first switch valve is connected with a front liquid outlet of a braking master cylinder, the output end of the first switch valve is connected with the input end of a first selection valve, the normally-opened output end of the first selection valve is connected with a first pressure charging valve, a second pressure charging valve and a first high pressure damper, and the normally-closed output end of the first selection valve is connected with a first pressure reducing valve, a second pressure reducing valve and a front wheel low pressure accumulator; the input end of a second switch valve is connected with a rear liquid outlet of the braking master cylinder, the output end of the second switch valve is connected with the input end of a second selection valve, the normally-opened output end of the second selection valve is connected with a third pressure charging valve, a fourth pressure charging valve and a second high pressure damper, and the normally-closed output end of the second selection valve is connected with a third pressure reducing valve, a fourth pressure reducing valve and a rear wheel low pressure accumulator; and a third switch valve is connected between the front wheel low pressure accumulator and a front wheel oil pump, and a fourth switch valve is connected between the rear wheel low pressure accumulator and a rear wheel oil pump. Due to the addition of the braking energy feedback function, the invention improves the continuous trip mileage of an electromobile and prolongs the service life of a braking system.

Description

technical field [0001] The invention relates to an automobile ABS hydraulic braking system, in particular to a hydraulic unit integrated with electric automobile energy feedback braking and ABS. Background technique [0002] The sustainable development of the automobile industry is facing the dual pressure of energy and environmental protection. For this reason, countries around the world are vigorously developing electric vehicles with zero emissions and zero pollution. However, the mileage of electric vehicles on one charge is far less than that of traditional fuel vehicles, which seriously affects the industrialization and rapid promotion of electric vehicles. [0003] The energy consumed in the braking process of automobiles running in urban areas generally exceeds 40%-50% of the total energy consumption of automobiles. Braking energy recovery is an important energy-saving measure for automobiles. Compared with traditional internal combustion engine vehicles, various fo...

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Problems solved by technology

[0005] According to the relevant patent literature search, it is found that the coexistence of hydraulic and electric braking systems is mainly through the following methods. One is to use a hydraulic unit with a servo mechanism, which has a complex structure, high machining accuracy, and high cost; A switching switch is installed on the brake pedal. The front section with low braking intensity adopts motor regenerative braking, and the rear section with high braking intensity adopts hydraulic braking. Although the structure is simple, the recovery rate of braking energy is low, and the switching process Problems such as large dynamic torque fluctuations

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