Torque converter and retarder integrated control hydraulic system and method

Abstract

The invention discloses a torque converter and retarder integrated control hydraulic system, which meets the requirements of a hydraulic torque converter and a hydraulic retarder on oil pressure in the working process by integrating a hydraulic torque converter and a hydraulic retarder control system, and realizes the coordination work of locking the hydraulic torque converter and the hydraulic retarder. Locking and unlocking of the hydraulic torque converter are controlled, the braking torque of the hydraulic retarder is controlled, locking oil pressure of the hydraulic torque converter is controlled through electromagnetic proportion, the hydraulic retarder is controlled through an electromagnetic proportion air valve, displacement of a main valve element is accurately controlled, and the working efficiency of a hydraulic system is improved. A cooling reversing valve and an oil cooler are further added, so that the hydraulic system corresponds to different cooling loops under different working conditions, a large amount of heat generated when the hydraulic torque converter and the hydraulic retarder work is taken away, normal operation of equipment is guaranteed, and power loss of the hydraulic system is reduced.

Description

technical field [0001] The invention belongs to the field of automobile gearboxes, in particular to a torque converter and retarder integrated control hydraulic system. Background technique [0002] Large-tonnage and heavy-duty vehicles use a mechanical gearbox with a hydraulic torque converter with a locking function. The operation of the hydraulic torque converter can increase the starting torque of the vehicle and improve the working conditions of the shifting clutch at low speed and heavy load; high-speed light-load When the hydraulic torque converter is blocked, the power loss is reduced. Installing a front hydraulic retarder can provide auxiliary braking and improve the driving safety of the vehicle. Therefore, the addition of a hydraulic torque converter with a locking function and a front hydraulic retarder on a mechanical gearbox for a large-tonnage heavy-duty vehicle can improve driving experience and safety, but the torque converter and hydraulic retarder are bot...

AI Technical Summary

Problems solved by technology

Therefore, the addition of a hydraulic torque converter with a locking function and a front hydraulic retarder on a mechanical gearbox for a large-tonnage heavy-duty vehicle can improve driving experience and safety, but the torque converter and hydraulic retarder are both It is a hydraulic transmission component and needs to be equipped with a corresponding hydraulic system, which will make the structure of the hydraulic system of the vehicle transmission system complex, increase the cost, and the efficiency of the hydraulic system is low. At the same time, both of them will generate a lot of heat when they are working. To operate, a cooling device is required to take away excess heat

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