Dual speed viscous fluid coupling

Details Dual speed viscous fluid coupling Dual speed viscous fluid coupling

1976-10-12

1977-12-27

Herrmann, Allan D.

192 clutches and power-stop control

Clutches

Fluent material

123 4112, 123 4146, 192 488, 192 82T, 192103F, F16D 3500, F16D 4325

Patent

active

040649806

ABSTRACT:
A viscous fluid coupling is provided of the type driven by a prime mover, the speed of which varies over a wide range. The coupling includes an output member defining two fluid chambers, with an input member being rotatably disposed in each of the fluid chambers, and the two input members being driven by the prime mover at different rotational speeds. At lower prime mover speeds, viscous fluid is pumped into the fluid chamber containing the higher speed ratio input member to provide a higher ratio of output speed to prime mover speed. At higher prime mover speeds, viscous fluid is pumped into the fluid chamber containing the lower speed ratio input member to provide a lower ratio of output speed to prime mover speed. Utilizing the disclosed fluid coupling as a drive for a radiator cooling fan results in more cooling at low engine speeds, but less wasted power at higher engine speeds.

REFERENCES:
patent: 3430743 (1969-03-01), Fujita et al.
patent: 3444748 (1969-05-01), Sutaruk
patent: 3536175 (1970-10-01), Kawabe et al.
patent: 3840101 (1974-10-01), Peter et al.
patent: 3924716 (1975-12-01), Brewer

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