混联式液压混合动力汽车动力系统

Series-parallel combined hydraulic power system of hybrid electric vehicle

Abstract

The invention discloses a series-parallel combined hydraulic power system of a hybrid electric vehicle, which belongs to the field of hydraulic hybrid vehicles and aims to solve the problem that advantages of series connection and advantages of parallel connection cannot be integrated in an existing hybrid vehicle system. The series-parallel combined hydraulic power system comprises an engine, a first one-way clutch, a power flow distributor, a flow distributing pump, a second one-way clutch, a coupler, a driving axle, a hydraulic energy accumulator and a hydraulic pump/motor, the engine is connected with a torque input end of the power flow distributor by the first one-way clutch, a first torque output end of the power flow distributor is connected with a torque input end of the flow distributing pump, an oil outlet of the flow distributing pump is communicated with an oil inlet of the hydraulic energy accumulator, an energy accumulation input and output oil outlet of the hydraulic energy accumulator is communicated with an oil port of the hydraulic pump/motor, a torque output end of the hydraulic pump/motor is connected with a first torque input end of the coupler, a second torque output end of the power flow distributor is connected with a second torque input end of the coupler by the second one-way clutch, and a torque output end of the coupler is connected with a torque input end of the driving axle.
混联式液压混合动力汽车动力系统,属于液压动力汽车领域,本发明为解决现有的动力汽车系统无法兼顾串联式和并联式的优点的问题。本发明包括发动机、第一单向离合器、功率分流器、分流泵、第二单向离合器、耦合器、驱动桥、液压蓄能器和液压泵/马达,发动机通过第一单向离合器与功率分流器的力矩输入端相连,功率分流器的第一力矩输出端与分流泵的力矩输入端相连,分流泵的油出口与液压蓄能器油入口相连通,液压蓄能器的蓄能输入输出油口与液压泵/马达油口相连通,液压泵/马达的力矩输出端与耦合器第一力矩输入端相连,功率分流器第二力矩输出端通过第二单向离合器与耦合器的第二力矩输入端相连,耦合器的力矩输出端与驱动桥的力矩输入端相连。

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