Research and control of shift without the disengagement of the clutch for automatic mechanical transmission in hybrid vehicle

Abstract

For the technical requirements of hybrid electric vehicle (HEV) equipped with automatic mechanical transmission (AMT), this chapter proposed an AMT control technology that shifts without the disengagement of the clutch. The technology' system components, working principle, engine and motor' control during shifting process and other key technologies were analyzed. Through dynamically modeling the various stages of shifting process, the shift characteristics and key factors affecting the quality of shifting were known. At the same time, a demo car without the disengagement of the clutch was tested. The results indicated: through controlling of engine, motor and AMT actuator, the HEV' AMT equipped without disengagement clutch can not only ensure smooth shifting, but also can effectively shorten the shift time, improve the shift quality significantly. © Springer-Verlag 2013.