Research Article

Global Optimal Energy Management Strategy Research for a Plug-In Series-Parallel Hybrid Electric Bus by Using Dynamic Programming

Table 3

Possible PHEB modes when .

Required torque and speed areas of final drivePHEB possible working modesRemarks

1EV mode, series modeIf the motor cannot supply sufficient torque, the ISG motor will provide the remaining torque
2Engine-ISG-motor parallel modeThe required torque of final drive exceeds the maximum torque provided by engine and motor together, and ISG motor provides remaining torque
3Engine-motor parallel mode None
4EV mode, series mode, engine-motor parallel modeNone
5engine-ISG parallel mode, engine-motor parallel mode, engine-only modeNone
6Engine-only mode, EV mode, engine-ISG parallel mode, engine-motor parallel mode, series modeNone