Viscous clutch assembly for torque transmission in motor vehicle

Details Viscous clutch assembly for torque transmission in motor vehicle Viscous clutch assembly for torque transmission in motor vehicle

1990-07-17

1991-12-10

Herrmann, Alan D.

192 clutches and power-stop control

Clutches

Automatic

192 58B, 192 85A, 192 93A, F16D 1304

Patent

active

050709755

ABSTRACT:
A viscous clutch assembly includes a viscous coupling arranged for generating a viscous resistance force in response to relative rotation between a pair of coaxially arranged rotary members, a cam mechanism cooperable with the viscous coupling for converting the viscous resistance force into a thrust force, a friction clutch mechanism cooperable with the cam mechanism to be brought into engagement when applied with the thrust force from the cam mechanism for establishing the drive connection between the rotary members. One of the rotary member is in the form of a cylindrical outer casing and the other rotary member is in the form of an internal rotary member coaxially surrounded by the outer casing. The viscous coupling includes a first rotary fin member fixedly mounted on the internal rotary member for rotation therewith and a second rotary fin member rotatably and axially slidably coupled within the outer casing in a fluid-tight manner for relative rotation with the first rotary fin member and being arranged to form a viscous fluid chamber containing therein the first rotary fin member. The viscous fluid chamber is filled with viscous fluid and air in such a manner as to permit movement of the second rotary fin member toward the first rotary fin member.

REFERENCES:
patent: 4058027 (1977-11-01), Webb

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