Hybrid power transmission hydraulic system

Abstract

The invention discloses a hybrid power transmission hydraulic system. The system comprises a high pressure oil path, a low pressure oil path, a first oil path and a second oil path, wherein one end ofthe high pressure oil path is connected to an oil tank, the other end of the high pressure oil path is correspondingly connected to one end of the first oil path and one end of the second oil path, the other end of the first oil path is connected with a clutch oil cylinder, the other end of the second oil path is connected with the low pressure oil path, one end of the low pressure oil path is connected with the oil tank, the other end of the low pressure oil path is connected with all heating parts of a motor, the high pressure oil path is provided with a high pressure oil pump, the low pressure oil path is provided with a low pressure oil pump, the first oil path is provided with a clutch solenoid valve, and the second oil path is provided with a first overflow valve as a system valve.The hybrid power transmission hydraulic system aims to solve the technical problem that in the prior art, a hybrid power transmission hydraulic system cannot meet the pressure requirement of a wet clutch and the flow requirement of motor heat dissipation under various different working conditions and is large in hydraulic loss.

Description

technical field [0001] The invention belongs to the field of hybrid powertrains, in particular to a hydraulic system of a hybrid power transmission. Background technique [0002] With the continuous advancement of new energy vehicles, the hybrid power system, as a form of new energy vehicles, is also increasing year by year in market demand. [0003] There are many layout forms in the design of the hybrid power system. The hydraulically controlled wet clutch is one of the more mature forms, which can meet multiple driving conditions such as pure electric driving, series driving, high-speed engine direct drive, parallel driving, etc., so that the motor and The two driving components of the engine are in high-efficiency working condition, and finally achieve the purpose of low fuel consumption, low emission and high driving mileage. It has good power and economy, and the cost is relatively low. There are also many forms of motor cooling methods, among which oil cooling is a ...

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Problems solved by technology

[0006] Based on this, the present invention proposes a hybrid transmission hydraulic system, which aims to solve the problem that the hybrid transmission hydraulic system in the prior art is difficult to meet the pressure of the wet clutch under various working conditions. Demand and flow requirements of motor heat dissipation and technical problems of large hydraulic loss

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