Torque transfer mechanism with hydraulic control system for a fo

Details Torque transfer mechanism with hydraulic control system for a fo Torque transfer mechanism with hydraulic control system for a fo

1980-12-05

1983-01-25

Herrmann, Allan D.

Machine element or mechanism

Gearing

Plural power paths to and/or from gearing

74740, 74785, 74869, 180247, B60K 1734, B60K 4104

Patent

active

043696716

ABSTRACT:
A four wheel drive torque transfer mechanism with a hydraulic control system is switchable between two wheel drive and four wheel drive during running of a vehicle having an automatic transmission. A reducer permits direct coupling or reduced speed ratio drives. A parking gear associating with the transfer device requires only small modification to the conventional parking mechanism. The hydraulic control system automatically actuates the reducer to provide a reduced speed-high torque output when a governor output responsive to vehicle speed, falls below a predetermined level.

REFERENCES:
patent: 3963085 (1976-06-01), Vinton
patent: 4274303 (1981-06-01), Shindo et al.

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