Apparatus for controlling rotational speed of radiator fan

Details Apparatus for controlling rotational speed of radiator fan Apparatus for controlling rotational speed of radiator fan

1986-04-25

1987-03-24

Cuchlinski, Jr., William A.

Automatic temperature and humidity regulation

Cooling radiator

Air control

62183, 123 4112, 123 4149, F01P 502

Patent

active

046519220

ABSTRACT:
A cooling system for a radiator in an internal combustion engine is provided with a pair of fans connected to a first motor for a small electric current and a second motor for a large electric current, respectively. Relays are provided for operating the first and/or second motor sequentially in accordance with the degree of cooling requirement of the engine. A delay device is provided for delaying the operation of the relay(s) for attaining a stronger cooling requirement for a predetermined short period just after the engine is started. A generation of rush current in the relay contacts is prevented.

REFERENCES:
patent: 4168456 (1979-09-01), Isobe
patent: 4313402 (1982-02-01), Lehnhoff et al.
patent: 4378760 (1983-04-01), Barge
patent: 4409933 (1983-10-01), Inoue
patent: 4426960 (1984-01-01), Hart
patent: 4549504 (1985-10-01), Gaines et al.
patent: 4590772 (1986-05-01), Nose et al.
patent: 4590892 (1986-05-01), Nose et al.

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