Transfer differential gear lock controller

Details Transfer differential gear lock controller Transfer differential gear lock controller

1989-12-15

1991-08-06

Marmor, Charles A.

Motor vehicles

Having four wheels driven

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

475231, B60K 1735

Patent

active

050369407

ABSTRACT:
A transfer differential gear lock controller in accordance with the present invention interlocks a switching operation of a transmission device between a low speed range and to a high speed range with a differential gear lock operation, controls a center differential gear lock mechanism to a lock state by detecting the operation state of the transmission device in the low speed range and makes it possible for a driver to complete his operation with only one shift operation to the low speed range. The controller makes it also possible to select between the lock state and free state for the center differential gear lock mechanism in response to the detection of the operation state of the transmission device in the high speed range through the driver's operation. For, those vehicles which are directed primarily to off-road driving are generally of low and high two-speed type, but in the case of four-wheel drive vehicles equipped with the center differential gear, the center differential gear lock mechanism must be locked under the road surface condition where driving must be made in the low speed range.

REFERENCES:
patent: 3765261 (1973-10-01), Hobbins
patent: 3848691 (1974-11-01), Dolan
patent: 3923113 (1975-12-01), Pagdin
patent: 3963085 (1976-06-01), Vinton
patent: 4432431 (1984-02-01), Russell
patent: 4601359 (1986-07-01), Weismann et al.
patent: 4644823 (1987-02-01), Mueller
patent: 4768399 (1988-09-01), Kubo et al.

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