Torque overlay device for hybrid drive and method for operating such a hybrid drive

摘要

The invention relates to a torque superposition device for use in a hybrid drive for motor vehicles, in particular for use in passenger vehicles. By means of the torque superimposition device, a torque of an internal combustion engine is superimposed with a torque of an electric motor and fed to an output of the vehicle. The torque superposition device comprises a first and a second torque input and a torque output, as well as a first transmission device and a second transmission device. The electric motor is torque-fixed coupled to the first torque input and the internal combustion engine with the second torque input, wherein the first torque input to the first translation device and the second torque input to the second translation device are fixed torque, and the translation devices are torque-fixed respectively output side coupled to the torque output of the torque superimposing , The first translation device comprises at least two alternatively selectable translation stages and the second translation device at least one alternatively selectable translation stage, wherein the first translation means for displaying the at least two alternatively selectable gear ratios comprises at least one planetary gear, and the second translation means for displaying the at least one selectable gear ratio at least one spur gear includes. The invention further relates to a hybrid drive comprising an internal combustion engine, an electric motor and a torque superposition device of the type described above and a method for operating such a hybrid drive in a motor vehicle.