24-06-2015 дата публикации
Номер: CN104728429A
Принадлежит:
The invention discloses a hydraulic control gear shifting system of a two-speed automatic gearbox of an electric vehicle. The hydraulic control gear shifting system comprises an oil pot, a motor, one-way valves, a plunger pump, an energy accumulator, a decompression valve, a proportional flow valve, a gear shifting oil cylinder, a sensor and a valve body. An oil inlet of the plunger pump is connected with the oil pot, and one one-way valve is arranged in an oil inlet and outlet duct, the other one-way valve is arranged in an oil outlet duct of the plunger pump, and then the oil outlet duct is connected with the energy accumulator, the decompression valve, an oil inlet of the proportional flow valve and a rod cavity of the gear shifting oil cylinder. The plunger pump is provided with two plunger components which are symmetrically arranged. The motor is a DC motor, and an eccentric shaft is arranged at the output end of the motor. The proportional flow valve is a proportional flow electromagnetic ...
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