APPARATUS FOR CONTROLLING ROTATIONAL SPEED OF RADIATOR FAN

• Main Author: NOBA, MASAHIKO
• Format: Patent
• Language: English; French
• Published: 07.03.1989
• Edition: 4
• Subjects: ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING,OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODSSPACES OF VEHICLES; BLASTING; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; COOLING OF INTERNAL-COMBUSTION ENGINES; COOLING OF MACHINES OR ENGINES IN GENERAL; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; ENGINE PLANTS IN GENERAL; GENERATION; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; STEAM ENGINES; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

APPARATUS FOR CONTROLLING ROTATIONAL SPEED OF RADIATOR FAN 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.