Hydraulically-actuated shift system for a transfer case

Details Hydraulically-actuated shift system for a transfer case Hydraulically-actuated shift system for a transfer case

1993-05-04

1995-01-03

Bonck, Rodney H.

192 clutches and power-stop control

Clutches

Operators

192 53F, F16D 2508, F16D 2302

Patent

active

053778006

ABSTRACT:
The present invention provides a hydraulically-actuated shift system that is operable for shifting a mechanical shift apparatus of a power transfer device between first and second operative positions. The hydraulically-actuated shift system includes a hydraulic circuit for providing a source of hydraulic power, a hydraulic actuator for selectively moving a clutch sleeve of the mechanical shift mechanism between the first and second drive positions, and an electric control circuit for controlling selective actuation of the hydraulic actuator. The shift system is particularly well-suited for use with four-wheel drive transfer cases for permitting the vehicle operator to shift between two-wheel and four-wheel drive modes and or between various speed ranges.

REFERENCES:
patent: 2562612 (1951-07-01), Halberg
patent: 4293061 (1981-10-01), Brown
patent: 4770280 (1988-09-01), Frost
patent: 4776444 (1988-10-01), Worner et al.
patent: 4844218 (1989-07-01), Genise
patent: 5105927 (1992-04-01), Frost
patent: 5234091 (1993-08-01), Kobayashi et al.

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