Planetary gear transmission systems or components – Fluid drive or control of planetary gearing – Impeller-turbine type fluid circuit and mechanical path in...
Patent
1996-08-29
1998-07-21
Bonck, Rodney H.
Planetary gear transmission systems or components
Fluid drive or control of planetary gearing
Impeller-turbine type fluid circuit and mechanical path in...
475 51, 192 5861, F16H 4708
Patent
active
057827150
ABSTRACT:
A fan drive assembly includes a viscous coupling device (11), a radiator cooling fan (F), and a speed increasing mechanism (13), so that, at relatively low engine speeds, the fan (F) is driven at a speed ("overdrive") greater than the input speed to the coupling device (11), and at relatively higher engine speeds, the input torque is transmitted through the viscous coupling in the normal manner. In the subject embodiment, the speed increasing mechanism (13) is a planetary gear set, in which torque is transmitted from the input shaft (21) to the planet carrier (47), and in the overdrive condition, the sun gear (53) is grounded. The output of the planetary is the ring gear (59), which directly drives a housing (61) attached to both the housing (17) of the viscous coupling, as well as the cooling fan (F), thus effectively bypassing the viscous clutching action.
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DeBrabander James R.
Godlew David P.
Walton Erlen B.
Bonck Rodney H.
Eaton Corporation
Kasper L. J.
Kwon Peter T.
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