Motor vehicles – Having four wheels driven – With differential means for driving two wheel sets at...
Patent
1990-07-20
1991-12-10
Rice, Kenneth R.
Motor vehicles
Having four wheels driven
With differential means for driving two wheel sets at...
180197, 36442603, B60K 1735, B60K 2816
Patent
active
050709615
ABSTRACT:
A central differential distributes output torque of a transmission to front wheels and rear wheels of a vehicle. A fluid-operated restricting device is provided for restricting the differential operation of the central differential. The central differential is arranged to distribute a larger torque to the rear wheels than that to the front wheels. A slip ratio of the rear wheels is calculated, and a desired slip ratio is set based on driving conditions of the vehicle. A slip ratio deviation of the rear-wheel slip ratio from the desired slip ratio is obtained. The fluid-operated restricting device is operated in accordance with the slip ratio deviation, in such a manner that the restricting magnitude increases with an increase of the slip ratio deviation.
REFERENCES:
patent: 4215593 (1980-08-01), Shono et al.
patent: 4538700 (1985-09-01), Suzuki
patent: 4776424 (1988-10-01), Naito
patent: 4866624 (1989-09-01), Nishikawa et al.
patent: 4884650 (1989-12-01), Fujiki et al.
patent: 4966249 (1990-10-01), Imaseki
patent: 4981190 (1991-01-01), Nakayama et al.
patent: 4986388 (1991-01-01), Matsuda
Farber Martin A.
Fuji Jukogyo Kabushiki Kaisha
Hurley Kevin
Rice Kenneth R.
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