Motor vehicle cooling fan power management system

Details Motor vehicle cooling fan power management system Motor vehicle cooling fan power management system

1982-05-17

1984-01-17

Wayner, William E.

Refrigeration

Automatic control

Responsive to vehicle body motion or traction

123 4112, 236 35, B60H 304, F01P 702

Patent

active

044257660

ABSTRACT:
A power control system for an electric motor driven cooling fan that directs air over the radiator and air conditioning condenser of a motor vehicle. The system includes a pulse width modulated voltage control device for controlling the voltage applied to the cooling fan motor from the vehicle engine driven generator. The voltage applied to the cooling fan motor can be controlled in response to engine coolant temperature, vehicle road speed, engine speed and the "on"/"off" state of the vehicle air conditioning system. A digital system that determines voltage pulse width in accordance with the above-mentioned variables is disclosed.

REFERENCES:
patent: 2452007 (1948-10-01), Weybrew
patent: 2807246 (1957-09-01), Jacobs
patent: 3052175 (1962-09-01), Beltz
patent: 3061277 (1962-10-01), Anderson
patent: 4179888 (1979-12-01), Goscenski
patent: 4313402 (1982-02-01), Lehnhoff et al.
patent: 4378760 (1983-04-01), Barge

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