Power Shift Feature Research of a Novel Active Transmission for Parallel Hybrid Vehicle Use

Abstract:

A novel active transmission for parallel hybrid vehicle use was developed, which was based on the fixed axis gear and integrated the driving motor. Through automatic switch actuator, the motor could connect to the input or output shaft selectively. The former assured that, it could work efficiently by using gear ratios properly. During gear shift, it could supply wheels with driving force continuously by temporarily connecting to the output shaft. Dynamic property matching design of Electrified Manual Transmission(EMT) was accomplished. Through simulation, the way, how EMT realized gear shift process without power interrupt, was explained. Based on the development of the first prototype and test bench experiment, the ability of motor to maintain driving force uninterrupted during gear shift process was analyzed.

Key words:hybrid electric vehicle; active transmission; power interrupt; power switch