System for controlling automobile cooling fan

Details System for controlling automobile cooling fan System for controlling automobile cooling fan

1996-04-22

1998-02-17

Tanner, Harry B.

Automatic temperature and humidity regulation

Cooling radiator

Air control

236 78D, 165299, F01P 702

Patent

active

057183732

ABSTRACT:
A system for controlling an automobile cooling fan utilizes a temperature-sensitive negative resistance device having a resistance which decreases as the temperature rises, and which increases as the temperature falls. Thus, if the cooling water temperature does not exceed a certain level, the cooling fan motor is not driven. If the temperature exceeds a certain level, the cooling fan motor is driven in proportion with the dynamic temperature variations. Therefore, a variable cooling fan speed is possible, and therefore, the cooling operation becomes efficient.

REFERENCES:
patent: 4124001 (1978-11-01), Samuel et al.
patent: 4425766 (1984-01-01), Samuel et al.
patent: 4555910 (1985-12-01), Sturges

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