CVT speed ratio control study on the dynamic performance compensation

摘要

There are some shortcomings in the CVT dynamic performance in the conventional economic model This study increased dynamic performance of vehicle through amending the target speed ratio and the proportional solenoid valve drive signal voltage With the driver's intention(the accelerator opening change rate), we get the driver's intention index. We use the driver's intention to modify the target speed ratio and to improve the engine line of work. To solve the problem that the speed ratio responds slowly, we raise the proportional solenoid valve drive signal voltage and accelerate the shift speed The real vehicle testing results show that in the conventional economic model car up to 50km/h in 4.3s; after dynamic performance compensation, car up to 50km/h in 3.6s, CVT ratio control method, based on dynamic performance compensation, can improve vehicle dynamic performance.