Hybrid vehicle clutch control method and system

Abstract

The invention discloses a hybrid vehicle clutch control method, which comprises the steps of: when the vehicle is in a non-parallel driving mode: calculating the equivalent energy consumption of the vehicle in each driving mode, if the equivalent energy consumption of the parallel driving mode is smaller than that of other modes , requesting to enter the parallel driving mode; when the vehicle meets the conditions for entering the parallel driving mode, the hybrid control unit issues an instruction to enter the parallel driving mode; taking the speed from the drive motor to the clutch driven end as the target speed, the generator is controlled to adjust the engine speed so that the engine The target speed to the active end of the clutch meets the requirements; when the clutch control conditions are met, the current of the solenoid valve is controlled to perform the clutch engagement action; when the vehicle is running in parallel drive mode: calculate the equivalent energy of the vehicle in the above three modes in real time When the equivalent energy consumption of the parallel driving mode is greater than that of the other modes, it is requested to exit the parallel driving mode, and the current of the solenoid valve is controlled so that the clutch is completely disengaged.

Description

technical field [0001] The present invention relates to a control method and system, in particular to a clutch control method and system. Background technique [0002] In recent years, with the country's increasing emphasis on new energy vehicles, the market share of hybrid vehicles has also been greatly improved accordingly. [0003] At present, there are mainly two clutch control methods for hybrid vehicles known in the prior art: one is open-loop control of clutch solenoid valve current; the other is closed-loop control of clutch solenoid valve current. [0004] It should be noted that the above clutch solenoid valve current open-loop control scheme is widely used in dual-clutch transmissions. By controlling the solenoid valve current, the plunger of the solenoid valve can be pushed to generate displacement, thereby squeezing the hydraulic oil to realize the coupling between the master and slave discs of the clutch. . However, it should be noted that this technical solu...

AI Technical Summary

Problems solved by technology

Since the pressure sensor detects the oil pressure of the clutch joint, there is an oil pressure hysteresis, and the closed-loop control algorithm cannot compensate the influence of the oil pressure hysteresis on the clutch engagement and disengagement process, and the algorithm may misidentify the clutch engagement and disengagement, and at the same time, increase the pressure Sensors incur additional costs

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