FIELD: transport engineering; engine cooling systems.
SUBSTANCE: proposed control system of cooling electric fan for internal combustion engine contains fuse, electric fan motor, fan secured on motor shaft, thermoresistor and temperature indicator. According to invention, system contains additionally amplifier, controllable multivibrator, power switch and diode. Plus bus of vehicle circuit is connected with first output of temperature indicator and trough fuse, with plus supply outputs of amplifier, controllable multivibrator, diode cathode and first output of electric fan motor. Second output of temperature indicator is connected with thermoresistor and input of amplifier whose output is connected with input of controllable multivibrator. Output of controllable multivibrator is connected to control input of power switch. Second output of thermoresistor, first power output of power switch and minus outputs of amplifier and controllable multivibrator are connected with minus bus of vehicle circuit, and second power outputs of power switch is connected with diode anode and second output of electric fan motor.
EFFECT: improved temperature conditions of internal combustion engine owing to stepless regulation of speed of rotation of cooling system fan.
1 dwg
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