A continuously variable transmission(CVT) ratio control algorithm is proposed to achieve the improved fuel economy of the parallel hybrid electric vehicle (HEV) by considering the HEV powertrain response lag.

• 考虑到并联混合电动车辆(HEV)动力系响应滞后,建议采用无级变速器(CVT)速比控制方法来实现HEV的燃油经济性的改进。