Abstract
Abstract
A new shift control algorithm without clutch operation for reducing the shift shock and improving accelerating ability of a parallel hybrid vehicle with an automated manual transmission (AMT) is presented in this paper. The engagement of clutch, which is the key point of shift control in general AMT, is sophisticated and very difficult. But in the parallel hybrid vehicle, shift control without clutch operation is possible because both the engine and motor can control the speed of input shaft of gearbox. Consequently, it not only improves the shift quality of vehicle, but also prolongs the life time of clutch. Simulation results indicate that the shift amenity and accelerating ability are improved by using the shift control algorithm without clutch operation.