Patent ID: 6238317
Filing Date: 2001-05-29
Classification: B60K,Y10T

Abstract:
A transmission for use in a four-wheel drive motor vehicle having an engine and front and rear drivelines, said transmission comprising:an input shaft adapted to be driven by the engine;a mainshaft;a front output shaft adapted to drive the front driveline;a rear output shaft adapted to drive the rear driveline;constant mesh gearsets which can be selectively engaged to couple said mainshaft to said input shaft for driven rotation at different speed ratios, said constant mesh gearsets including a compound gear rotatably supported on said mainshaft and having a first drive gear and a second drive gear, a first input gear rotatably supported on said input shaft and meshed with said first drive gear, and a second input gear supported on said input shaft and meshed with said second drive gear;a first clutch for selectively coupling one of said first and second input gears to said input shaft;a planetary gearset having a sun gear driven by said mainshaft, a ring gear, a carrier, and a pinion gear meshed with said sun gear and said ring gear, and which is rotatably supported on said carrier;an interaxle differential interconnecting said carrier to said front and rear output shafts, said interaxle differential having an input member driven by said carrier, a first output member driving said front output shaft, and a second output member driving said rear output shaft;a second clutch for selectively coupling said ring gear to one of said mainshaft and a stationary member; anda third clutch for controlling speed differentiation and torque biasing between said front and rear output shafts in response to the occurrence of slip therebetween.