Patent ID: 6852053
Filing Date: 2005-02-08
Classification: B60K,B60L,F16H,H02K,Y02T,Y10S

Abstract:
1. A drivetrain for transmitting driving force from an engine to a drive shaft of a vehicle, comprising: a composite planetary gear mechanism including first to fourth rotational elements arrayed on an alignment chart, the first rotational element being connected to an output shaft of the engine and the second rotational element being connected to the drive shaft, a first motor-generator connected to the third rotational element, a second motor-generator connected to the fourth rotational element, the second motor-generator being arranged coaxially with the first motor-generator, and a clutch interposed between the output shaft of the engine and the first rotational element, wherein the first and second rotational element are positioned between the third and fourth rotational elements on the alignment chart and mechanical connections between the output shaft of the engine and the rotational elements of the composite planetary gear mechanism are all interrupted when the clutch is disengaged.