192 clutches and power-stop control – Clutch and brake – Sliding operation
Patent
1995-09-19
1997-09-16
Lorence, Richard M.
192 clutches and power-stop control
Clutch and brake
Sliding operation
192 7012, 192 82T, 192 91A, 192103F, 123 4112, F16D 6704, F16D 2502, F16D 4325
Patent
active
056670451
ABSTRACT:
A clutch mechanism for a cooling fan of a size capable of fitting into the limited envelope available in an over-the-road diesel tractor. A compact housing has a belt drive input and an output connected to the fan hub. A wet clutch is included within the housing lubricated by oil from the engine lubrication system. The housing includes an internal positive displacement booster pump cooperating with a controllable valve in the oil return line to the engine sump. When it is desired to operate the clutch, the valve is controllably closed to restrict flow from the clutch mechanism to the engine sump line. The positive displacement pump thereupon causes an increase in pressure in a pressure chamber in the housing, which acts on an internal piston to translate the clutch in a continuously variable manner between engaged and disengaged conditions.
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Fan Drives for Electronic Diesel Engines, article from Diesel Progress Engines & Drives, date unknown.
"Digital Hall Effect Position/Motion Sensing of Off Road Equipment Components" by Thomas J. Gastel of Micro Qwitch -Sep. 12-15, 1988.
Lorence Richard M.
Rockford Powertrain, Inc.
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