Patent ID: 8308594
Filing Date: 2012-11-13
Classification: F02N

Abstract:
1. A drivetrain for a motor vehicle, having an engine which has a drivable engine shaft with a first axial direction, having a transmission which has a transmission input shaft in rotationally driving connection with the engine shaft, having an electric machine which has a rotor and a stator and which can be operated in a generator mode, in which electrical energy can be generated utilizing a relative movement between the rotor and the stator, and a starter mode in which electrical energy can be converted into a relative movement between the rotor and the stator, and having a planetary gear set which has three elements, specifically a sun gear, a planet gear carrier with planet gear carriers, and a ring gear, of which a first element which forms a drive input side of the planetary gear set in the generator mode and forms a drive output side of the planetary gear set in the starter mode, is in rotationally driving connection with the engine shaft, a second element, which forms a drive output side of the planetary gear set in the generator mode and forms a drive input side of the planetary gear set in the starter mode, is in rotationally driving connection with the rotor and a third element can be fixed by means of a first actuating device to a stationary housing in the starter mode, with a second actuating device also being provided which, in the generator mode, interacts with at least one of the elements in such a way that the planetary gear set performs a block rotation, wherein the planetary gear set is arranged in front of the engine in the second axial direction and the transmission is arranged behind the engine in the first axial direction and wherein the second element and the rotor are not arranged coaxially and are in rotationally driving connection with one another via a traction mechanism, and wherein the second element forms a closed lubricant chamber within which the elements of the planetary gear set are arranged and wherein the traction mechanism is wrapped about a wheel rotationally driving connection with the rotor.