Motor vehicles – Having four wheels driven – With differential means for driving two wheel sets at...
Patent
1990-01-09
1992-08-04
Marmor, Charles A.
Motor vehicles
Having four wheels driven
With differential means for driving two wheel sets at...
180245, 180248, 475 86, 475221, 475249, B60K 1735
Patent
active
051350718
ABSTRACT:
A power transmitting apparatus on a four-wheel-drive motor vehicle can distribute and transmit drive power from a power unit to front and rear drive road wheels such that the rotational speeds of the front and rear drive road wheels can differ from each other. The power transmitting apparatus includes a casing rotatable by the drive power from the power unit, an output shaft disposed in the casing, first and second planetary gear mechanisms disposed between the casing and the output shaft, the first and second planetary gear mechanisms comprising first and second ring gears fixed to an inner periphery of the casing, first and second sun gears aligned with the first and second ring gears, respectively, first and second planet gears meshing with the first ring and sun gears and the second ring and sun gears, respectively, and rotatable about their own axes and the ring gears, and a planet carrier coupled to the output shaft, the first and second planet gears being rotatably supported on the planet carrier, the first and second planetary gear mechanisms having different speed-changing ratios, one of the speed-changing ratios being selected such that the rear drive road wheels rotate faster than the front drive road wheels, first and second clutches coupled respectively to the first and second sun gears, respectively, for selectively holding the first and second sun gears nonrotatable thereby to enable the first and second planetary gear mechanisms to transmit the drive power, and a pair of variable-torque-transmitting clutches coupled to respective ends of the output shaft.
REFERENCES:
patent: 4420059 (1983-12-01), Suzuki
patent: 4497218 (1985-02-01), Zaunberger
patent: 4523493 (1985-06-01), Weib
patent: 4681180 (1987-07-01), Oyama et al.
patent: 4719985 (1988-01-01), Zaiser
patent: 4735110 (1988-04-01), Altenberg
patent: 4763747 (1988-08-01), Muller
patent: 4779699 (1988-10-01), Hatano
patent: 4840246 (1989-06-01), Yamakawa
Ezure Yoshinobu
Shibahata Yasuji
Shimada Kazuhiko
Tokushima Shyoji
Boehler Ann
Honda Giken Kogyo Kabushiki Kaisha
Marmor Charles A.
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