Patent ID: 6595086
Filing Date: 2003-07-22
Classification: B60K,F16H,Y10T

Abstract:
A power distribution apparatus for a four-wheel drive vehicle having a transversely laid out front engine outputting a drive force via a transmission coupled thereto, comprising:a transfer unit disposed at a rear of said engine and including: a pair of direction changing gears for changing a transmission direction of said drive force to a rear direction of said vehicle; a first gear provided on a gear shaft extending rearward from one of said pair of direction changing gears; a second gear meshed with said first gear so as to transfer said drive force transmission direction to be parallel with said rear direction; an output shaft adapted to rotatably pass through an axial center of a gear shaft of said second gear so as to output said drive force to said rear direction of said vehicle; a hydraulic multi-plate clutch for variably transmitting torque between said gear shaft of said second gear and said output shaft; and an oil pressure control mechanism integrally incorporating at least an oil pressure source for generating a hydraulic oil pressure for said hydraulic multi-plate clutch and an oil pressure control portion for controlling a clamping force of said hydraulic multi-plate clutch; wherein said hydraulic multi-plate clutch is disposed on an axial center of said second gear at a position closer to said engine than said second gear, said oil pressure control mechanism portion is disposed close to a side of said hydraulic multi-plate clutch, and said drive force is distributed to rear wheels of said vehicle via said hydraulic multi-plate clutch of said transfer unit.