Hydraulic power device and control method thereof

Abstract

The invention provides a hydraulic power device. The hydraulic power device is used for providing required power and flow for a load. The device comprises a liquid storage tank, an electric pump, an oil suction filter, a pressure relief valve, a high-pressure filter, a bypass one-way valve, a check valve and an energy accumulator, wherein an oil inlet of the oil suction filter is connected with the liquid storage tank; an oil outlet of the oil suction filter is connected with an oil suction port of the electric pump; an oil outlet of the electric pump is in parallel connection with one end ofthe pressure relief valve and one end of the high-pressure filter; the two ends of the high-pressure filter are connected with the bypass one-way valve in parallel; the other end of the high-pressurefilter is connected with the energy accumulator through the check valve; the other end of the pressure relief valve is connected with the liquid storage tank; and the energy accumulator is connected with the load. The invention further provides a hydraulic power control method. According to the hydraulic power device and the control method thereof, the control efficiency of a hydraulic execution system can be improved.

Description

technical field [0001] The invention relates to a hydraulic power device and a control method thereof, in particular to a hydraulic power device that provides required pressure and flow for a transmission hydraulic actuator system and a control method thereof. Background technique [0002] Reducing CO2 emissions and improving vehicle fuel efficiency have become a major focus of the entire automotive industry as increasingly stringent emissions regulations come into effect. As an important part of the vehicle transmission system, the transmission is related to the performance of the vehicle, fuel consumption and other aspects. How to improve the energy saving and emission reduction performance of the vehicle through the transmission has become an extremely important task in the automotive industry. [0003] As the core component of the automatic transmission, the hydraulic control system has a great influence on the power transmission efficiency of the transmission. Designing...

AI Technical Summary

Problems solved by technology

At present, most automatic transmissions use the engine to directly drive the mechanical pump as the power source of the hydraulic control system. This hydraulic source is greatly affected by the engine's working conditions, especially when the engine is running at high speed, a large amount of hydraulic fluid output by the mechanical pump is not used. Under the circumstances, it returns directly to the liquid storage tank, resulting in low efficiency of the entire hydraulic control system

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