Flatness based control of a parallel hybrid drivetrain*

The main advantage of hybrid electric vehicles (HEV) is consumption reduction and minimization of exhaust emissions. Moreover, drivability can be increased in a HEV. Due to the electric machine in the drivetrain of a parallel HEV, it is possible to realize gear shifts without an intermission in the wheel torque and therefore to increase the drivability of the vehicle. The start of the internal combustion engine during the electrical driving is also a very critical task for the drivability of a parallel HEV.In this paper a feedforward control for the drivetrain of a parallel HEV with an automated manual transmission and a dry clutch is described.