Control apparatus for four-wheel drive vehicle with center diffe

Details Control apparatus for four-wheel drive vehicle with center diffe Control apparatus for four-wheel drive vehicle with center diffe

1986-12-29

1988-08-23

Love, John J.

Motor vehicles

Having four wheels driven

With differential means for driving two wheel sets at...

7386233, 74711, B60K 17352

Patent

active

047654341

ABSTRACT:
Disclosed is a control apparatus for a four-wheel drive vehicle having a center differential mechanism which allows a difference in rotating speed between front and rear wheels so as to absorb a difference in turning radius developed between the front and rear wheels when the vehicle is cornering, and a center differential clutch for limiting differential action of the center differential mechanism. The control apparatus has front-wheel torque sensor provided on a front-wheel drive shaft. When a negative torque is sensed on the front-wheel side while the vehicle is traveling with a restraint placed upon the differential action of the center differential mechanism, the restraint is reduced or removed automatically. This prevents occurrence of a tight corner braking phenomenon and permits the function of the center differential mechanism to fully manifest itself. The vehicle is kept in a stable and safe traveling condition in which driving force is fully utilized.

REFERENCES:
patent: 3605523 (1971-09-01), O'Brien
patent: 3938890 (1976-02-01), Flavell
patent: 4135391 (1979-01-01), Dahle
patent: 4343205 (1982-08-01), Dzida
patent: 4466502 (1984-08-01), Sakai
patent: 4484654 (1984-11-01), Hayakawa
patent: 4552241 (1985-11-01), Suzuki
patent: 4566554 (1986-01-01), Suzuki
patent: 4669569 (1987-06-01), Suzuki et al.

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