State observation method for electro-hydraulic manipulation system of vehicle transmission device

Abstract

The invention relates to a state observation method for an electro-hydraulic manipulation system of a vehicle transmission device, and belongs to the technical field of electro-hydraulic manipulationand control over vehicle transmission. In order to solve the problems that in the prior art, the vehicle gear shifting quality is affected due to the fact that clutch oil pressure sensors are difficult to arrange on actual vehicles in the situations in which hydraulic automatic transmissions and hybrid power transmission devices exist, and observers based on the rotational speeds of input shafts and output shafts has lots of limitations, a state observation system of the electro-hydraulic manipulation system is constructed, a solenoid valve input current I and a pressure regulating valve spooldisplacement x<valve> (or output oil pressure P<out>) signal are collected, and according to a discretized system state equation, the unscented Kalman filter method is adopted to estimate the clutchoil pressure and other state variables of the electro-hydraulic manipulation system at the next moment, so that the real-time accurate estimation of the clutch oil pressure is realized by using the easy-to-measure signal, and the closed-loop control over the clutch oil pressure can be realized to ensure the gear shifting quality of the vehicles.

Description

technical field [0001] The invention belongs to the technical field of electro-hydraulic manipulation and control of vehicle transmission, and in particular relates to a state observation method of an electro-hydraulic manipulation system. Background technique [0002] Due to the structural characteristics of hydraulic automatic transmissions and hybrid power transmissions, it is difficult to arrange clutch oil pressure sensors on real vehicles. Traditional open-loop shift quality calibration methods are robust to changes in system parameters such as oil temperature, engine speed, and clutch wear. The overfilling or underfilling of the clutch in the shift preparation phase will cause the timing problem of the oil filling and oil discharge clutch overlap in the torque phase, which will affect the shifting quality of the vehicle. [0003] In recent years, many scholars have used observers based on input and output shaft speeds to estimate clutch oil pressure, but this observer...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is how to provide a method for observing the state of the electro-hydraulic control system of the vehicle transmission, so as to solve the problem that the clutch oil pressure sensor is not installed in the actual vehicle when there are hydraulic automatic transmissions and hybrid transmissions in the prior art. It is difficult to arrange and affect the quality of vehicle shifting, and there are many limitations in the observer based on the input and output shaft speed

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