Device for controlling 4wd vehicle central differential restrict

Details Device for controlling 4wd vehicle central differential restrict Device for controlling 4wd vehicle central differential restrict

1987-05-18

1988-06-21

Wright, Dirk

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

747105, 180249, B60K 4118, F16H 144

Patent

active

047518561

ABSTRACT:
In a four wheel drive vehicle, a central differential device receives rotational power from an engine and provides it to the combination of the front wheels of the vehicle and also to the combination of the rear wheels of the vehicle. This central differential device includes a device for selectively restricting its operation. A control device is provided for this central differential device operation restriction device, and includes: (a) a means for detecting a condition representative of the road speed of the vehicle and of the load on the engine; and (b) a means for controlling the device for selectively restricting the operation of the central differential device, so that the operation of the central differential device is less restricted than otherwise, when the vehicle speed is relatively high and also the engine output is not relatively high. Various specializations of this control device, and also the method of operation thereof, are also disclosed.

REFERENCES:
patent: 3845671 (1974-11-01), Sharp et al.
patent: 4538700 (1985-09-01), Suzuki
patent: 4690239 (1987-01-01), Takahashi et al.
patent: 4693143 (1987-09-01), Harada et al.
patent: 4699236 (1987-10-01), Morisawa et al.
patent: 4702341 (1987-10-01), Taga et al.

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