Internal-combustion engines – Cooling – Automatic coolant flow control
Patent
1976-12-29
1978-02-21
Herrmann, Allan D.
Internal-combustion engines
Cooling
Automatic coolant flow control
123 4146, 192 82T, 192 84C, F16D 2710, F16D 4325, F01P 702
Patent
active
040746623
ABSTRACT:
An electromagnetically controlled clutch is used to engage and disengage the cooling fan of a water cooled motor vehicle engine. The clutch and fan assembly in the form of an adapter kit may be attached to the existing fan mountings normally located on the water pump pulley assembly. The adapter kit includes an extender cylinder which bolts to the existing fan mountings. Bearings are provided inside this cylinder for rotationally free mounting a fan mounting hub supported on a shaft, which is free to rotate within the extender hub. An annular armature is spaced from the pulley assembly and supported around the hub by leaf springs, attached at one end to the hub and at the other end through rigid extender arms to the armature. A clutch face is provided on the water pump pulley and an electromagnet coil is fixedly mounted to the engine block in a recess in the pulley for attracting the armature under the control of a temperature operated switch, which energizes the coil when the temperature of the engine coolant exceeds a preestablished value to draw the armature into contact with a clutch face on the pulley assembly to rotate the fan.
REFERENCES:
patent: 2706468 (1955-04-01), Willcox
patent: 3730151 (1973-05-01), Smith et al.
patent: 3743068 (1973-07-01), Westervelt et al.
patent: 3924585 (1975-12-01), Woods
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