Cooling Fan Module for a Motor Vehicle

Abstract

A cooling fan module for a motor vehicle has a first fan motor which is used to drive a first cooling fan and a second fan motor which is used to drive a second cooling fan. A control unit ( 6, 13 ) is associated with the first fan motor ( 2, 11 ), which operates the first fan motor ( 2, 11 ) and the second fan motor ( 4, 12, 23 ) simultaneously, in order to provide an economical and compact technical solution for the cooling fan.

1 . A cooling fan module for a motor vehicle, with a brushless first fan motor for driving a first cooling fan and with a second fan motor for driving a second cooling fan with a control unit being assigned to the first fan motor, which, at the same time as operating the first fan motor, also operates the second fan motor. 
   
   
       2 . The cooling fan module according to  claim 1 , wherein the first fan motor and the second fan motor are connected in series. 
   
   
       3 . The cooling fan module according to  claim 1 , wherein the control unit comprises a power supply independent of the power supply of the fan motors. 
   
   
       4 . A method for operating a cooling fan module for a motor vehicle, with the cooling fan module having a brushless first fan motor for driving a first cooling fan and a second fan motor for driving a second cooling fan, with a control unit being assigned to the first fan motor, the method comprising the steps of
 operating the first fan motor as well the second fan motor at the same time, and   controlling the first fan motor via the control unit with speed regulation and the speed of the second fan motor being set as a function of the speed of the first fan motor.   
   
   
       5 . The method according to  claim 4 , wherein the first fan motor and the second fan motor are connected in series. 
   
   
       6 . The method according to  claim 4 , wherein the control unit comprises a power supply independent of the power supply of the fan motors. 
   
   
       7 . A cooling fan module for a motor vehicle, with a brushless first fan motor for driving a first cooling fan and with a second fan motor for driving a second cooling fan, with a control unit being assigned to the first fan motor, which, at the same time as operating the first fan motor, also operates the second fan motor, wherein the control unit is operable to control the first fan motor with speed regulation and the speed of the second fan motor being set as a function of the speed of the first fan motor. 
   
   
       8 . The cooling fan module according to  claim 7 , wherein the first fan motor and the second fan motor are connected in series. 
   
   
       9 . The cooling fan module according to  claim 7 , wherein the control unit comprises a power supply independent of the power supply of the fan motors.