Control method for clamping stagnation detection of wet-type DCT electromagnetic valve

Abstract

The invention provides a control method for clamping stagnation detection of a wet-type DCT electromagnetic valve. The control method comprises the steps that the running speed of a vehicle, the actual torque of a clutch and the opening degree of an accelerator pedal are obtained so as to recognize the running states of the vehicle and a gearbox; when the running speed of the vehicle is smaller than a set vehicle speed threshold value, the actual torque is smaller than a set torque threshold value, and the opening degree of the accelerator pedal is smaller than a set opening degree threshold value, it is determined that the current vehicle needs to be subjected to clamping stagnation detection of a clutch pressure control electromagnetic valve. and the expected pressure and the actual pressure of the clutch are obtained, whether the clutch pressure control electromagnetic valve is clamped or not is judged according to the difference value of the expected pressure and the actual pressure, and if yes, the electromagnetic valve with clamping stagnation is flushed. By means of the method, the situation that pressure of the clutch is abnormal due to clamping stagnation of the electromagnetic valve, and vehicle faults and power interruption are caused seriously can be avoided, and the using safety of the vehicle can be improved.

Description

technical field [0001] The invention relates to the technical field of clutch control, in particular to a control method for sticking detection of a wet DCT solenoid valve. Background technique [0002] A typical wet DCT (Dual Clutch Automatic Transmission) consists of two coaxial nested or parallel clutches, two coaxial and inner and outer nested input shafts, two parallel output shafts, arranged on the output shaft It consists of multiple synchronizer devices, multiple shift forks, a differential, and an HCU (hydraulic unit). Among them, solenoid valves with different functions are distributed on the HCU. When the gearbox is working, by controlling the solenoid valves, the corresponding actuators are controlled by hydraulic drive. The main actuators include clutches and synchronizer forks. In order to make the vehicle have good driving performance, the speed and size of the clutch combination need to be precisely controlled, and the solenoid valve is a component that dire...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a control method for sticking detection of a wet DCT solenoid valve, which solves the problem that the solenoid valve of the existing warm DCT is easily stuck due to impurities and causes a clutch control failure, and can avoid abnormal pressure of the clutch due to the sticking of the solenoid valve. , in severe cases, it will cause the vehicle to report failure and power interruption, which can improve the safety of automobile use

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