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Cooling fan module for a motor vehicleCooling fan module for a motor vehicle description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20090155103, Cooling fan module for a motor vehicle. Brief Patent Description - Full Patent Description - Patent Application Claims
This application is a U.S. national stage application of International Application No. PCT/EP2006/066021 filed Sep. 5, 2006, which designates the United States of America, and claims priority to German application number 10 2005 048 887.0 filed Oct. 12, 2005, the contents of which are hereby incorporated by reference in their entirety. The invention relates to a cooling fan module for a motor vehicle. In particular the invention relates to a cooling fan module with a first fan motor for driving a first cooling fan and with a second fan motor for driving a second cooling fan. Frequently two or more cooling fans are used in cooling fan modules for motor vehicles. When two cooling fans are used the module is also referred to as a double module. There are a number of reasons for using more than one cooling fan: One is that the space available in the motor vehicle is often restricted. Another is that the fan output required is often an argument for using a number of cooling fans. Since for higher outputs the fan motors employed are of greater length, it often makes sense, as regards the length of module needed, to divide the module up into two smaller, shorter fan motors. If high cooling power is required, a separation into two (or more) cooling fans is often sensible and/or necessary, since, because of its inadequate heat removal, a single fan motor cannot provide the power needed. In addition it can be necessary, because of the design of a motor vehicle or for other reasons, to use heat exchangers which have a more rectangular shape. By contrast with a cube shape, a double-fan configuration makes more sense for a more rectangular shape, since a greater coverage of the heat exchanger can be achieved with this shape and the air flow from the corners of the heat exchanger is improved. Finally two or more cooling fan modules can be used if—for example for reasons of availability—a redundancy is to be achieved. Previously such double modules have featured two direct current motors with brushgear which have been operated either in series or in parallel, in order to obtain specific speeds and thereby power output stages. In newer applications the direct current motors with brushgear have been operated with internal, external PWM actuating units or units integrated into one of the two motors. Increased demands in respect of module length, power and costs have also demanded new approaches to solutions for double modules. According to an embodiment, a cost-effective and compact fan cooling can be provided by 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. According to a further embodiment, the first fan motor and the second fan motor may be connected in parallel. According to a further embodiment, the second fan motor may be 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. According to a further embodiment, the second fan motor may be an asynchronous motor or a synchronous motor which is connected directly to the connection elements of the first motor. According to another embodiment, 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, may comprise 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. The invention will be described below with reference to exemplary embodiments which are explained in greater detail with the aid of drawings. The drawings show the following simplified diagrams: Continue reading about Cooling fan module for a motor vehicle... Full patent description for Cooling fan module for a motor vehicle Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Cooling fan module for a motor vehicle patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Cooling fan module for a motor vehicle or other areas of interest. ### Previous Patent Application: Contra-rotating axial flow fan unit Next Patent Application: Low vibration pump Industry Class: Pumps ### FreshPatents.com Support Thank you for viewing the Cooling fan module for a motor vehicle patent info. IP-related news and info Results in 2.29118 seconds Other interesting Feshpatents.com categories: Tyco , Unilever , Warner-lambert , 3m paws |
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