WO2009140146A2 - Device for driving assemblies which can be activated temporally successively - Google Patents

Device for driving assemblies which can be activated temporally successively Download PDF

Info

Publication number
WO2009140146A2
WO2009140146A2 PCT/US2009/043230 US2009043230W WO2009140146A2 WO 2009140146 A2 WO2009140146 A2 WO 2009140146A2 US 2009043230 W US2009043230 W US 2009043230W WO 2009140146 A2 WO2009140146 A2 WO 2009140146A2
Authority
WO
WIPO (PCT)
Prior art keywords
assembly
clutch
clutch section
section
shear
Prior art date
Application number
PCT/US2009/043230
Other languages
French (fr)
Other versions
WO2009140146A3 (en
Inventor
Christian Tilly
Original Assignee
Borgwarner Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Borgwarner Inc. filed Critical Borgwarner Inc.
Publication of WO2009140146A2 publication Critical patent/WO2009140146A2/en
Publication of WO2009140146A3 publication Critical patent/WO2009140146A3/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D35/00—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion
    • F16D35/02—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion with rotary working chambers and rotary reservoirs, e.g. in one coupling part
    • F16D35/021—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion with rotary working chambers and rotary reservoirs, e.g. in one coupling part actuated by valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F01P5/04—Pump-driving arrangements
    • F01P5/043—Pump reversing arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F01P5/12—Pump-driving arrangements

Definitions

  • the invention relates to a device for driving assemblies which can be activated temporally successively, as per the preamble of claim 1.
  • the invention firstly utilizes the principle of a liquid friction clutch, as explained for example in DE 197 49 342 Al, the entire content of which document is hereby incorporated by reference in the content of disclosure of the present application.
  • the liquid friction clutch or viscous clutch has a reservoir for a shear fluid, a working chamber with at least one shear gap, and a stationary dynamic pressure element, by means of which the shear fluid can be transferred from the reservoir into the working chamber.
  • the liquid friction clutch has a first clutch section and a second clutch section.
  • the first assembly is assigned to the first clutch section and the second clutch section, which is assigned to the second assembly, is connected downstream of and is fluidically connected to the first clutch section. It is therefore possible to firstly actuate the first assembly by supplying shear fluid into the first clutch section, after which the second assembly can be connected to the drive device of the device according to the invention in a positively controlled fashion and temporally after the coupling- in of the first assembly.
  • control is possible by means of the finidically connected clutch sections merely by transferring the shear fluid from the first clutch section to the second clutch section, without further device-related regulating expenditure being required in addition to control or regulating components, such as a switching valve and an actuator, which are provided in any case.
  • the subclaims contain advantageous refinements of the invention. It is thus possible according to the invention to provide the first and second clutch sections with in each case only one shear gap. It is however also possible to provide both clutch sections with a plurality of such shear gaps by providing corresponding working chambers, such that, per clutch section, it is possible to increase the torque to be transmitted to the respective assembly.
  • the first assembly is designed as a coolant pump
  • the second assembly is designed as a fan wheel, of a motor vehicle cooling device.
  • Figure 1 shows a schematically highly simplified illustration of a first possible embodiment of the device according to the invention
  • Figure 2 shows an illustration, corresponding to figure 1, of a second embodiment.
  • the device 1 according to the invention is a part of a cooling device for internal combustion engines.
  • the principles of the present invention are explained below on the basis of said example, wherein it is self- evident that the principles according to the invention may be applied to all devices for driving assemblies which can be activated temporally successively.
  • the device or cooling device 1 accordingly has a first assembly in the form of a coolant pump 2 and a second assembly in the form of a fan wheel 3.
  • the device 1 is provided with a drive device 4 which, in the example, is symbolized by a belt pulley 20.
  • the drive device 4 or the belt pulley 20 thereof is driven by a motor (not illustrated in figure 1), with the drive connection betw r een the motor and the belt pulley 20 taking place by means of a belt drive (likewise not illustrated).
  • Alternative designs for the drive device 4 are of course likewise conceivable.
  • the device 1 has a liquid friction clutch 5 which has a housing 14 with a radially outer reservoir 15 and a first clutch section 6 and also a second clutch section 7.
  • a stationary dynamic pressure tube 8 is also provided which, in interaction with a switching valve 12 which can be actuated by means of an actuator 13, can conduct shear liquid from the reservoir 15 into working chambers of the first clutch section 6 and of the second clutch section 7. Said working chambers are symbolized by shear gaps 11 and 16, with the respective shear liquid return line being symbolized by the dashed lines 9 and 10, which lead back into the reservoir 15.
  • the device 1 accordingly has a liquid friction clutch or viscous clutch 5 which functions according to known operating principles.
  • the first assembly or the coolant pump 2 can be coupled by means of a shaft 17 to the first clutch section 6, while the second assembly or the fan wheel 3 can be coupled by means of a shaft 18 to the second guide section 7.
  • the first clutch section 6 is supplied with shear liquid first, such that torque is transmitted via the shaft 17 and the coolant pump 2 is rotated.
  • the coolant pump 2 has reached its maximum power, an activation of the fan wheel 3 takes place without further regulating intervention by means of a transfer of the shear liquid from the first clutch section 6 into the second clutch section 7, since, as a result of the activation of the second clutch section 7, a torque is transmitted via the shaft 18 to the fan wheel 3, which is thereby set in rotation.
  • figure 2 is of the same design and has the same mode of operation, such that with regard to all the corresponding features and functions, reference can be made to the description of figure 1.
  • said embodiment differs from the embodiment according to figure 1 , which has only one shear gap, by a multiplicity of working chambers or shear gaps 11 and 16 of the first clutch section 6 and second clutch section 7 respectively.
  • the resulting sequence of working chambers which are arranged in series makes it possible for torque to be transmitted according to how many working chambers or shear gaps are supplied with shear liquid, so as to permit a successive increase in the transmitted torque to the first assembly 2 or the second assembly 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

A device (1) for driving assemblies which can be activated temporally successively, having a drive device (4), having a first assembly (2), having a second assembly (3), and having a liquid friction clutch (5), wherein the liquid friction clutch (5) has a first clutch section (6), which is assigned to the first assembly (2). and a second clutch section (7) which is connected downstream of and is fluidically connected to the fust clutch section (6), by means of which second clutch section (7) the second assembly (3) can be coupled to the drive device (4) in a positively controlled fashion and temporally after the coup ling- in of the first assembly (3).

Description

DEVICE FOR DRIVING ASSEMBLIES WHICH CAN BE ACTIVATED TEMPORALLY SUCCESSIVELY
DESCRIPTION
The invention relates to a device for driving assemblies which can be activated temporally successively, as per the preamble of claim 1.
The design and mode of operation of previously known devices of said type is complex since a high level of control or regulating expenditure is required, with corresponding control and regulating components, for activating the assembly which is to be activated temporally later.
It is therefore an object of the present invention to create a device for driving assemblies which can be activated temporally successively, as per the preamble of claim 1, which permits a reduction in the control or regulating expenditure for the activation of the assembly or assemblies which are to be activated after a time delay.
Said object is achieved by means of the features of claim 1.
The invention firstly utilizes the principle of a liquid friction clutch, as explained for example in DE 197 49 342 Al, the entire content of which document is hereby incorporated by reference in the content of disclosure of the present application.
Accordingly, the liquid friction clutch or viscous clutch has a reservoir for a shear fluid, a working chamber with at least one shear gap, and a stationary dynamic pressure element, by means of which the shear fluid can be transferred from the reservoir into the working chamber.
According to the invention, however, in contrast to the prior art, the liquid friction clutch has a first clutch section and a second clutch section. Here, the first assembly is assigned to the first clutch section and the second clutch section, which is assigned to the second assembly, is connected downstream of and is fluidically connected to the first clutch section. It is therefore possible to firstly actuate the first assembly by supplying shear fluid into the first clutch section, after which the second assembly can be connected to the drive device of the device according to the invention in a positively controlled fashion and temporally after the coupling- in of the first assembly. In principle, therefore, control is possible by means of the finidically connected clutch sections merely by transferring the shear fluid from the first clutch section to the second clutch section, without further device-related regulating expenditure being required in addition to control or regulating components, such as a switching valve and an actuator, which are provided in any case.
The subclaims contain advantageous refinements of the invention. It is thus possible according to the invention to provide the first and second clutch sections with in each case only one shear gap. It is however also possible to provide both clutch sections with a plurality of such shear gaps by providing corresponding working chambers, such that, per clutch section, it is possible to increase the torque to be transmitted to the respective assembly.
In one particularly preferred embodiment of the invention, the first assembly is designed as a coolant pump, and the second assembly is designed as a fan wheel, of a motor vehicle cooling device. In said embodiment, it is possible with the principle according to the invention to firstly drive the pump wheel with the full drive power, and to subsequently activate the fan wheel after a time delay, in order to be able to correspondingly increase the cooling power if the operation of the pump wheel alone were no longer sufficient to provide the required cooling power.
Further details, features and advantages of the invention can be gathered from the following description of exemplary embodiments on the basis of the drawing, in which: Figure 1 shows a schematically highly simplified illustration of a first possible embodiment of the device according to the invention, and
Figure 2 shows an illustration, corresponding to figure 1, of a second embodiment.
In the illustrated example, the device 1 according to the invention is a part of a cooling device for internal combustion engines. The principles of the present invention are explained below on the basis of said example, wherein it is self- evident that the principles according to the invention may be applied to all devices for driving assemblies which can be activated temporally successively. Furthermore, below, reference will be made to twro assemblies which can be activated temporally successively, wherein it should be highlighted that this is also merely an example, since it is also possible for more than two assemblies to be driven by means of the mode of operation according to the invention. The device or cooling device 1 accordingly has a first assembly in the form of a coolant pump 2 and a second assembly in the form of a fan wheel 3.
Furthermore, the device 1 is provided with a drive device 4 which, in the example, is symbolized by a belt pulley 20. The drive device 4 or the belt pulley 20 thereof is driven by a motor (not illustrated in figure 1), with the drive connection betwreen the motor and the belt pulley 20 taking place by means of a belt drive (likewise not illustrated). Alternative designs for the drive device 4 are of course likewise conceivable.
Furthermore, the device 1 has a liquid friction clutch 5 which has a housing 14 with a radially outer reservoir 15 and a first clutch section 6 and also a second clutch section 7. A stationary dynamic pressure tube 8 is also provided which, in interaction with a switching valve 12 which can be actuated by means of an actuator 13, can conduct shear liquid from the reservoir 15 into working chambers of the first clutch section 6 and of the second clutch section 7. Said working chambers are symbolized by shear gaps 11 and 16, with the respective shear liquid return line being symbolized by the dashed lines 9 and 10, which lead back into the reservoir 15.
The device 1 according to the invention accordingly has a liquid friction clutch or viscous clutch 5 which functions according to known operating principles. Here, the first assembly or the coolant pump 2 can be coupled by means of a shaft 17 to the first clutch section 6, while the second assembly or the fan wheel 3 can be coupled by means of a shaft 18 to the second guide section 7.
Since the two clutch sections 6 and 7 are flow-connected, in the event of an actuation of the switching valve 12, the first clutch section 6 is supplied with shear liquid first, such that torque is transmitted via the shaft 17 and the coolant pump 2 is rotated. Once the coolant pump 2 has reached its maximum power, an activation of the fan wheel 3 takes place without further regulating intervention by means of a transfer of the shear liquid from the first clutch section 6 into the second clutch section 7, since, as a result of the activation of the second clutch section 7, a torque is transmitted via the shaft 18 to the fan wheel 3, which is thereby set in rotation.
In principle, the embodiment according to figure 2 is of the same design and has the same mode of operation, such that with regard to all the corresponding features and functions, reference can be made to the description of figure 1.
As shown by the diagrammatic illustration of figure 2, said embodiment differs from the embodiment according to figure 1 , which has only one shear gap, by a multiplicity of working chambers or shear gaps 11 and 16 of the first clutch section 6 and second clutch section 7 respectively. The resulting sequence of working chambers which are arranged in series makes it possible for torque to be transmitted according to how many working chambers or shear gaps are supplied with shear liquid, so as to permit a successive increase in the transmitted torque to the first assembly 2 or the second assembly 3.
In addition to the written disclosure above, reference is hereby explicitly made, for further explanation of the disclosure, to the diagrammatic illustration in figures 1 and 2.
List of reference symbols
Device for driving assemblies which can be activated temporally successively First assembly (coolant pump) Second assembly (fan wheel) Drive device Liquid friction clutch First clutch section Second clutch section Dynamic pressure tube (stationary) , 10 Return line for shear liquid 1, 16 Shear gap 2 Switching valve 3 Actuator of the switching valve 4 Housing 5 Reservoir 7, 18 Shafts 9 Overflow from the first clutch section 6 into the second clutch section 7 0 Belt pulley

Claims

1. A device (1 ) for driving assemblies which can be activated temporally successively, - having a drive device (4), having a first assembly (2), having a second assembly (3), and having a liquid friction clutch (5), characterized - in that the liquid friction clutch (5) has a first clutch section (6), which is assigned to the first assembly (2), and a second clutch section (7) which is connected downstream of and is fluidically connected to the first clutch section (6), by means of which second clutch section (7) the second assembly (3) can be coupled to the drive device (4) in a positively controlled fashion and temporally after the coupling-in of the first assembly (3).
2. The device as claimed in claim 1, characterized in that the clutch sections (6, 7) can be regulated by means of a switching valve (12).
3. The device as claimed in claim 1 or 2, characterized in that the first clutch section (6) and the second clutch section (7) have in each case only one shear gap (11 and 16 respectively).
4. The device as claimed in claim 1 or 2, characterized in that the first clutch section (6) and the second clutch section (7) have in each case a multiplicity of shear gaps (1 1 and 16 respectively) which are in each case arranged in series and flow-connected to one another.
5. The device as claimed in one of claims 1 to 4, characterized in that the first assembly is designed as a coolant pump (2) of a cooling device of a motor vehicle which is provided with an internal combustion engine.
6. The device as claimed in one of claims 1 to 5, characterized in that the second assembly (3) is designed as a fan wheel of a cooling device of a motor vehicle which is provided with an internal combustion engine.
7. The device as claimed in one of claims 1 to 6, characterized in that the switching valve (12) can be operated by means of an actuator (13).
PCT/US2009/043230 2008-05-14 2009-05-08 Device for driving assemblies which can be activated temporally successively WO2009140146A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP08008951.9 2008-05-14
EP20080008951 EP2123930B1 (en) 2008-05-14 2008-05-14 Device for powering machines activated in succession

Publications (2)

Publication Number Publication Date
WO2009140146A2 true WO2009140146A2 (en) 2009-11-19
WO2009140146A3 WO2009140146A3 (en) 2010-03-04

Family

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Application Number Title Priority Date Filing Date
PCT/US2009/043230 WO2009140146A2 (en) 2008-05-14 2009-05-08 Device for driving assemblies which can be activated temporally successively

Country Status (2)

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EP (1) EP2123930B1 (en)
WO (1) WO2009140146A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9506507B2 (en) 2013-03-14 2016-11-29 Horton, Inc. Multi-speed viscous clutch

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS518461A (en) * 1974-07-10 1976-01-23 Usui Kokusai Sangyo Kk ENJINREIKYAKUYOFUANNO KANONSADORYUTAISETSUSHU
US3968866A (en) * 1974-11-29 1976-07-13 Eaton Corporation Fluid coupling
US4051936A (en) * 1976-06-03 1977-10-04 Eaton Corporation Fluid coupling device and valve support used therein
JPS6053225A (en) * 1983-09-01 1985-03-26 Usui Internatl Ind Co Ltd Fluid coupling device
US5101950A (en) * 1990-12-26 1992-04-07 Eaton Corporation Fluid coupling device with improved dump time
JP2007198178A (en) * 2006-01-24 2007-08-09 Toyota Industries Corp Fan coupling mounting structure

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3444748A (en) * 1967-02-01 1969-05-20 Eaton Yale & Towne Drive mechanism
DE19749342A1 (en) 1997-11-07 1999-06-02 Mannesmann Sachs Ag Controllable fluid friction clutch for operating auxiliary aggregate of car, especially compressor
US7083032B2 (en) * 2004-08-30 2006-08-01 Borgwarner Inc. Electronically controlled fluid coupling device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS518461A (en) * 1974-07-10 1976-01-23 Usui Kokusai Sangyo Kk ENJINREIKYAKUYOFUANNO KANONSADORYUTAISETSUSHU
US3968866A (en) * 1974-11-29 1976-07-13 Eaton Corporation Fluid coupling
US4051936A (en) * 1976-06-03 1977-10-04 Eaton Corporation Fluid coupling device and valve support used therein
JPS6053225A (en) * 1983-09-01 1985-03-26 Usui Internatl Ind Co Ltd Fluid coupling device
US5101950A (en) * 1990-12-26 1992-04-07 Eaton Corporation Fluid coupling device with improved dump time
JP2007198178A (en) * 2006-01-24 2007-08-09 Toyota Industries Corp Fan coupling mounting structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9506507B2 (en) 2013-03-14 2016-11-29 Horton, Inc. Multi-speed viscous clutch

Also Published As

Publication number Publication date
EP2123930B1 (en) 2011-09-21
EP2123930A1 (en) 2009-11-25
WO2009140146A3 (en) 2010-03-04

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