Method for operating an electric fan motor

Abstract

A method for actuating an electric fan motor for an internal combustion engine of a motor vehicle, comprising the steps:—determining an operating duration during which the fan motor is operated below a rotational speed which is critical with regard to pasting;—wherein if the operating duration exceeds a duration which is critical with regard to pasting, the fan motor is operated for a defined time duration at a washing rotational speed which is higher than the rotational speed which is critical with regard to pasting.

1 . A method for operating an electric fan motor for an internal combustion engine of a motor vehicle, the method comprising:
 determining an operating duration during which the fan motor is operated below a rotational speed which is critical in terms of pasting;   wherein in the event of the operating duration exceeding a duration which is critical in terms of pasting of the fan motor, the fan motor is operated for a defined time period at a washing rotational speed which is higher than the rotational speed which is critical in terms of pasting.   
     
     
         2 . The method as claimed in  claim 1 , wherein the rotational speed which is critical in terms of pasting of the fan motor is approximately 2000 rpm. 
     
     
         3 . The method as claimed in  claim 1 , wherein the operating duration of the fan motor which is critical in terms of pasting is approximately 100 hours. 
     
     
         4 . The method as claimed in  claim 1 , wherein the defined time period is approximately 10 minutes. 
     
     
         5 . The method as claimed in  claim 1 , wherein the washing rotational speed corresponds substantially to a maximum rotational speed of the fan motor. 
     
     
         6 . The method as claimed in  claim 1 , wherein the method is embodied as software of a control unit of the motor vehicle. 
     
     
         7 . The method as claimed in  claim 6 , wherein the software is embodied as part of a control software package, wherein the software is processed cyclically. 
     
     
         8 . The method as claimed in  claim 6 , wherein the software has a high priority within the control software package. 
     
     
         9 . The method as claimed in  claim 1 , wherein the numerical values for the rotational speed and the operating duration of the fan motor which are critical in terms of pasting are determined from experimental investigations of the fan motor, technical simulation investigations of the fan motor, or both. 
     
     
         10 . The method as claimed in  claim 9 , wherein the value for the washing rotational speed is determined from experimental investigations of the fan motor. 
     
     
         11 . A control unit for carrying out the method as claimed in  claim 1 . 
     
     
         12 . The control unit as claimed in  claim 11 , wherein the control unit is embodied as a central control unit or as a component control unit of a motor vehicle.