Hybrid vehicle clutch control method and system

Abstract

The invention discloses a hybrid vehicle clutch control method which comprises the following steps: when a vehicle is in a non-parallel driving mode, calculating equivalent energy consumption of the vehicle in each driving mode, and 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 vehiclemeets the condition of entering the parallel driving mode, sending an instruction of entering the parallel driving mode by the hybrid power control unit; taking the rotating speed from the driving motor to the clutch driven end as a target rotating speed, controlling the generator to adjust the engine rotating speed to enable the target rotating speed from the engine to the clutch driving end to meet requirements; when the clutch control condition is met, controlling the current of the electromagnetic valve to execute the clutch combination action; and when the vehicle runs in the parallel driving mode, calculating equivalent energy consumption of the vehicle in the three modes in real time, requesting to quit the parallel driving mode when the equivalent energy consumption of the paralleldriving mode is greater than the equivalent energy consumption of the other modes, and controlling the current of the electromagnetic valve so as to enable the clutch to finish separation.

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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