The Research Of Simulation For The Clutch Control Of Wet Dual Clutch Transmission

Dual Clutch Transmission (DCT) is the focus of the vehicle transmission field. The study of key technologies of DCT system, and the development of DCT with independent intellectual property right to master the key technologies, have great practical significance to promote the development and technological progress of automotive industry china.In this paper, the study of key technology of the DCT dual wet clutch is carried out relying on a project National High-tech R&D Program (863 Program)'Development of high performance automatic transmission for economical car'. Based on Matlab/Simulink platform, simulation research of launching and shifting process for the clutch control of wet dual clutch transmission was perpormed. The main works as follow:â‘ In order to improve the quality of vehicle starting, based on the ignition, loosing the principle of brake and treading the accelerator pedal, the clutch control strategy of DCT launching was established. This control strategy is that the clutch starts to combine after loosing the principle of brake; the main parameters of the control contain speed and splicing, clutch engaging displacement, the throttle valve and its rate control. Among those, the engaging displacement and jointing speed can be converted into the piston pressure plate stress and pressure variation for wet dual clutch. According to the basic parameters of vehicles, the value of control parameters.â‘¡In order to improve the quality of vehicle shifting for the principle, based on the analysis of dual clutch transmission shifting quality factors and the combination advantages of each shifting type. The clutch transmission torque rate and transmission system damping effect of exchange files quality were investigated. By controlling the engine output torque and the clutch transmission torque rate in shifting, the clutch control strategies of upshifting and downshifting were formulated respectively.â‘¢On the basis of the basic parameters of vehicle, the control strategy of launching and Matlab/Simulink simulation platform was established simulating the clutch control system. Analyzing the simulation results of the clutch control for the DCT launching when the phase is in the'without throttle angle phase'or'throttle angle phase'.â‘£Based on the basic parameters of vehicle, the control strategy of shifting and Matlab/Simulink simulation platform, the simulation model of the clutch control system was establish. The simulation of clutch control for the DCT shifting was investigated.