Hybrid Driveline Concepts for Front and Rear Wheel Drive Cars

At the Gear Research Center (FZG) of the Technical University of Munich concepts for hybrid drivelines are developed. The concepts discussed are based on automated manual transmission design. For the electric power flow the same gears are used in opposite torque flow direction compared to combustion engine power flow to enable good acceleration at low driving speed. In order to reduce fuel consumption the electric motor is also used for energy recuperation during deceleration of the vehicle. This energy may be stored by a battery or by double layer capacitors depending on the requirements (full/mild hybrid concept). In addition the driveline concept enables boosting during gear change of the automated manual transmission to reduce traction loss during gear change. Transmission concepts for front and rear wheel drive cars will be presented. Drivability is shown by simulations of the hybrid system behavior.