Speed-of-revolution control circuit for an electric radiator fan of an internal combustion engine,申请号DE19873724571-传众专利搜索

Speed-of-revolution control circuit for an electric radiator fan of an internal combustion engine

申请公布号：DE3724571(A1)

申请号：DE19873724571

申请日期：1987.07.24

申请公布日期：1989.02.02

申请人：

KLOECKNER-HUMBOLDT-DEUTZ AG

发明人：WALLENFANG,GERD;SEIF,ULRICH;RECHBERG,REINHARD;ZIMMERMANN,HOLGER

分类号：F01P7/04;F04D27/00

主分类号：F01P7/04

摘要：The electric motor of a radiator fan can usually be switched on and off by means of a temperature-dependent contact. When the electric motor starts, a high start-up current which highly loads the electric motor and the vehicle's electrical system is produced. In the partial load range of the internal combustion engine, excessive cooling usually takes place as a result of which a high number of switching operations occur which have an extremely adverse effect on the service life of the switching elements. According to the invention, there is provision for the electric motor to be connected to the voltage source by a series resistor which can be bypassed, the series resistor being bypassed when a high threshold value temperature of the internal combustion engine is exceeded. The circuit for controlling the speed of revolution is provided for electric radiator fans in internal combustion engines. <IMAGE>