Motor vehicles – Having four wheels driven – With differential means for driving two wheel sets at...
Patent
1991-01-18
1993-03-30
Focarino, Margaret A.
Motor vehicles
Having four wheels driven
With differential means for driving two wheel sets at...
180197, 36442602, 3644241, B60K 1735
Patent
active
051975661
ABSTRACT:
A four-wheel drive vehicle has a center differential which transmits the output torque of a power plant to both front and rear wheels in such a manner as to permit the front and rear wheels to rotate at different speeds. A differential control system has a differential rotation limit member which acts on the center differential to limit differential rotation of the front and rear wheels to a degree which is increased as the difference in rotational speed between the front and rear wheels increases. The degree of limitation on the differential rotation of the front and rear wheels is changed according to a predetermined characteristics which nullifies the degree of limitation in a range where the difference in rotational speed is relatively small and provides a gain in a range where the difference in rotational speed is relatively large. The gain is changed according to a factor which governs the running condition of the vehicle.
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Kameda Osamu
Nagaoka Mitsuru
Nishimura Eizi
Sotoyama Kaoru
Watanabe Ken'ichi
Focarino Margaret A.
Hurley Kevin
Mazda Motor Corporation
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