Power Matching Design and Test Validation of a Novel Active Transmission for PHEV Application

Abstract:

Features of different power transmission paths of a novel fixed shaft active transmission were analyzed. From aspects of maximal velocity, ramp start capability and backup power, dynamic property requirements of different vehicle modes were given, the necessity of a new power matching design method was explained. According to backup power requirements, types and power ratings of power sources were selected. According to ramp start capability requirements and maximal clutch slipping work during ramp start, 1_st gear ratio was determined. According to maximal velocity requirements, drive motor power transmission paths ratios and remaining gear ratios were calculated. Structural features of EMT prototype and vehicle prototype were described, Based on NEDC, energy consumption test was realized. The methods to realize smooth drive torque at wheels during mode or gear switch was were explained in details.