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, comprising a brushless first fan motor for driving a first cooling fan and a second fan motor for driving a second cooling fan, 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 parallel. 
   
   
       3 . The cooling fan module according to  claim 1 , wherein the second fan motor is a dc motor with brushgear which on the one hand is connected via a phase-dependent number of rectifiers to connection elements of the first fan motor and on the other hand to the power supply line or the ground line of the control unit. 
   
   
       4 . The cooling fan module according to  claim 1 , wherein the second fan motor is an asynchronous motor which is connected directly to the connection elements of the first motor. 
   
   
       5 . A method for operating a cooling fan module for a motor vehicle, wherein the cooling fan module has a brushless first fan motor for driving a first cooling fan and a second fan motor for driving a second cooling fan, the method comprising the steps of:
 assigning a control unit to the first fan motor, which, as well as operating the first fan motor also operates 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.   
   
   
       6 . The method according to  claim 5 , wherein the first fan motor and the second fan motor are connected in parallel. 
   
   
       7 . The method according to  claim 5 , wherein the second fan motor is a dc motor with brushgear which on the one hand is connected via a phase-dependent number of rectifiers to connection elements of the first fan motor and on the other hand to the power supply line or the ground line of the control unit. 
   
   
       8 . The method according to  claim 5 , wherein the second fan motor is an asynchronous motor which is connected directly to the connection elements of the first motor. 
   
   
       9 . The method according to  claim 5 , wherein the second fan motor is a synchronous motor which is connected directly to the connection elements of the first motor. 
   
   
       10 . The cooling fan module according to  claim 1 , wherein the second fan motor is a synchronous motor which is connected directly to the connection elements of the first motor. 
   
   
       11 . A cooling fan module for a motor vehicle, comprising
 a brushless first fan motor driving a first cooling fan and a second fan motor driving a second cooling fan, a control unit being assigned to the first fan motor, the control unit being operable to set the speed of the second fan motor as a function of the speed of the first fan motor.   
   
   
       12 . The cooling fan module according to  claim 11 , wherein the first fan motor and the second fan motor are connected in parallel. 
   
   
       13 . The cooling fan module according to  claim 11 , wherein the second fan motor is a dc motor with brushgear which on the one hand is connected via a phase-dependent number of rectifiers to connection elements of the first fan motor and on the other hand to the power supply line or the ground line of the control unit. 
   
   
       14 . The cooling fan module according to  claim 11 , wherein the second fan motor is an asynchronous motor which is connected directly to the connection elements of the first motor.