Cooling system for an internal-combustion engine of a motor vehi

Details Cooling system for an internal-combustion engine of a motor vehi Cooling system for an internal-combustion engine of a motor vehi

1996-01-11

1997-04-08

Okonsky, David A.

Internal-combustion engines

Cooling

Automatic coolant flow control

123 4112, F01P 502

Patent

active

056178166

ABSTRACT:
A cooling system and a method for controlling a cooling system for an internal-combustion engine of a motor vehicle having a thermostatic valve which can be switched over from a higher control level to a lower control level. A fan is provided which is assigned to a coolant radiator and which contains a fan control circuit with a temperature comparison step which compares the ACTUAL temperature of the coolant with a desired value. When the desired value is exceeded, a temperature signal is generated which is applied to an input of an AND-element. A switching signal for the switch-over of the thermostatic valve to the lower control level is applied to the other input of the AND-element which forms a switch-on signal for the fan.

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