Four wheel drive system for vehicle

Details Four wheel drive system for vehicle Four wheel drive system for vehicle

1987-11-20

1989-09-19

Hill, Mitchell J.

Motor vehicles

Having four wheels driven

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

B60K 1734

Patent

active

048672629

ABSTRACT:
In a four wheel drive vehicle, wherein either a state where differential action between front wheels and rear wheels is restricted or a permitted state can be selected, the differential rate is calculated during stable running conditions, and, when the differential rate is greater than or equal to a predetermined value, the restriction of differential action is prohibited. As a result, power circulation can be prevented when there is a difference in effective radius between the front wheels and rear wheels due to, e.g., use of a temper tire, mounting of chains on the tires, or the like.

REFERENCES:
patent: 4511014 (1985-04-01), Makita
patent: 4669569 (1987-06-01), Suzuki
patent: 4690239 (1987-09-01), Takahashi

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