Internal-combustion engines – Cooling – Automatic coolant flow control
Patent
1988-04-15
1989-04-25
Argenbright, Tony M.
Internal-combustion engines
Cooling
Automatic coolant flow control
F01P 702
Patent
active
048237442
ABSTRACT:
A device for controlling the rotation speed of a cooling fan of an internal combustion engine in a vehicle such as an automobile, wherein the fan is driven by a hydraulic motor powered by an operating fluid supplied by a pump directly driven by the engine, wherein the device controls partial relief of the hydraulic fluid supplied from the pump toward the motor so that, in a low engine revolution speed range, the ratio of the partial relief is decreased as the engine temperature increases, but in a high engine revolution speed range, the ratio of the partial relief is increased as the engine revolution speed increases.
REFERENCES:
patent: 4200146 (1980-04-01), Olson
patent: 4223646 (1980-09-01), Kinder
patent: 4446697 (1984-05-01), Goscenski Jr.
patent: 4479532 (1984-10-01), Watanabe
Argenbright Tony M.
Carlberg Eric R.
Toyota Jidosha & Kabushiki Kaisha
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