Patent ID: 7993230
Filing Date: 2011-08-09
Classification: B60K,B60Y

Abstract:
1. A vehicle powertrain for a ground vehicle, the powertrain comprising: an engine for providing a rotational power; an input shaft coupled to the engine for receiving the rotational power; an output shaft coupled to a load; a first pair of hydrostatic units coupled to a first pair of gears; a second pair of hydrostatic units selectively coupled to one of a first pair and a second pair of clutches, wherein the first pair of clutches has a first clutch gear and second clutch has a second clutch gear; a first mode gear selectively coupled to the first clutch gear and rotationally fixed to the output shaft; a second mode gear selectively coupled to the second clutch gear and rotationally fixed to the input shaft; and a planetary gear set having a sun gear engaged with a plurality of planetary gears, wherein the planetary gears are rotatably coupled to a planetary gear carrier and wherein the planetary gears are engaged with a ring gear that is coupled to the input shaft.