Gearbox hydraulic system

Abstract

The invention discloses a gearbox hydraulic system. The gearbox hydraulic system comprises an oil supply subsystem, a main oil pressure control subsystem, a clutch control subsystem, a gear shifting control subsystem and a lubricating and cooling subsystem, the oil supply subsystem is in communication with the lubricating and cooling subsystem through a lubricating oil way, an oil cooler communicated with the lubricating oil way is arranged in the lubricating and cooling subsystem, the output end of the lubricating and cooling subsystem is provided with three branches which are in communication with a first flow control valve, a second flow control valve and a set of throttling holes correspondingly, the first flow control valve is in communication with a first motor, the second flow control valve is in communication with a second motor, and the group of throttling holes are correspondingly communicated with a bearing, a clutch, a gear and a synchronizer. According to the gearbox hydraulic system, lubricating oil is divided into three paths after being cooled by the oil cooler, so that the lubricating and cooling subsystem can accurately supply cooling lubricating oil according to different working conditions and cooling requirements of different parts of the gearbox, the cooling efficiency is improved, and unnecessary oil consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of automobile gearboxes, in particular to a gearbox hydraulic system. Background technique [0002] The so-called hybrid system usually refers to the gasoline-electric hybrid system. A transmission system that can couple the power of the engine and the drive motor in a certain way and realize variable speed and torque is called a hybrid gearbox. Hybrid transmissions can generally be divided into dedicated hybrid transmissions and improved hybrid transmissions based on traditional transmissions integrating hybrid units (drive motors and corresponding control systems). [0003] In the hybrid system, the working mode of the drive motor is extremely flexible: it can drive the vehicle alone to achieve pure electric driving; it can be used as a starting device for the engine to assist the engine to start; it can provide boost to the engine and improve the acceleration ability of the vehicle; When the engine driv...

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Problems solved by technology

[0004] However, with the increasingly stringent national regulations on fuel consumption and emissions of automobiles, special hybrid transmissions are facing higher energy consumption requirements, and the design of the oil supply system in the prior art is not reasonable enough. The oil pump in the oil circuit will grab oil when it is working, which increases the filter load of the oil outlet filter; the unreasonable setting of the structural design of the hydraulic system between the various system functions leads to excessive work of the oil pump, resulting in unnecessary energy consumption , and excessive emissions will eventually affect the use of the gearbox, affecting the performance and service life of each component in the gearbox

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