Control system and control method of fluid coupling type transmission

Abstract

The invention provides a control system and a control method of a fluid coupling type transmission. The control system comprises an automatic transmission electronic control system and an automatic transmission hydraulic system; the automatic transmission hydraulic system comprises an oil pump, an oil supply system, a shifting system and a hydraulic torque converter locking and cooling managementsystem, and the automatic transmission electronic control system comprises a sensor, a TCU and a solenoid valve. In the invention, the control system and a control strategy of the fluid coupling typetransmission can realize real-time communication of an engine and a transmission, guarantee that engine input revolving speed, torque and transmission gear satisfy needs of vehicle operations, meanwhile, also can actively adjust a transmission operating state according to will of a driver, and guarantee that the automatic transmission can work according to preset optimal control rules under any working condition, thereby, can achieve optimal shifting quality and transmission efficiency.

Description

technical field [0001] The invention belongs to the technical field of automatic transmissions, and in particular relates to a control system and a control method suitable for hydraulic coupling transmissions. Background technique [0002] At present, domestic automatic transmissions are developing very rapidly. As a new type of automatic transmission, the hydromechanical dual clutch transmission is composed of a hydraulic torque converter and a dual clutch transmission. The gear shifting of the dual clutch transmission is achieved through the cooperation of two clutches and the control of the clutch actuator and the gearshift actuator without power interruption, and its transmission principle is similar to that of the AMT transmission. The transmission mechanism is mostly mechanical transmission. The cooperation of the clutch makes the shift speed faster than that of AMT, so it has higher power and fuel economy. However, the structure of the dual-clutch transmission is re...

AI Technical Summary

Problems solved by technology

However, the structure of the dual-clutch transmission is relatively complex, and there are many control units. If the control strategy is not coordinated properly, the dual-clutch transmission will produce a serious sense of frustration during the shifting process, and even double gears will occur, resulting in the vehicle not being able to drive normally.

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