| 摘要 |
<p>The present invention provides a speed ratio control method applicable to CVT of EVs so as to optimize the motor performances. Said speed ratio control method for CVT of EVs comprises the following steps: the controller acquires the real-time opening degree signals of accelerator pedal, the motor rotational speed and the speed ratio of CVT, and regulates the motor rotational speed or the speed ratio of CVT according to said signals, so that the motor can work within the range of high efficiency motor rotational speed, while satisfying power requirement of entire vehicle. Through reasonable control of speed ratio and regulation of motor rotational speed, CVT becomes more compatible with the motor and the motor efficiency is optimized on the basis of ensuring the power requirement of entire vehicle. The power system works under the optimum condition so that the energy utilization efficiency and drivability are improved.</p> |
