US20040173341A1 - Oil cooler and production method - Google Patents

Oil cooler and production method Download PDF

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Publication number
US20040173341A1
US20040173341A1 US10/404,015 US40401503A US2004173341A1 US 20040173341 A1 US20040173341 A1 US 20040173341A1 US 40401503 A US40401503 A US 40401503A US 2004173341 A1 US2004173341 A1 US 2004173341A1
Authority
US
United States
Prior art keywords
oil cooler
oil
tubes
tank
cooler
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US10/404,015
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English (en)
Inventor
George Moser
Gordon Sommer
Adam Ostapowicz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EDC Automotive LLC
Original Assignee
EDC Automotive LLC
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 EDC Automotive LLC filed Critical EDC Automotive LLC
Priority to US10/404,015 priority Critical patent/US20040173341A1/en
Assigned to EDC AUTOMOTIVE, LLC reassignment EDC AUTOMOTIVE, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: OSTAPOWICZ, ADAM, MOSER, GEORGE, SOMMER, GORDON
Priority to JP2006508721A priority patent/JP2006522311A/ja
Priority to DE212004000019U priority patent/DE212004000019U1/de
Priority to PCT/US2004/004157 priority patent/WO2004093519A2/en
Publication of US20040173341A1 publication Critical patent/US20040173341A1/en
Priority to US11/140,670 priority patent/US20050217833A1/en
Priority to US12/017,428 priority patent/US20080173428A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
    • F28D7/082—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0234—Header boxes; End plates having a second heat exchanger disposed there within, e.g. oil cooler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F2001/027—Tubular elements of cross-section which is non-circular with dimples
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49359—Cooling apparatus making, e.g., air conditioner, refrigerator

Definitions

  • the present invention relates to the area of cooling of the fluids that are used in machinery such as engines, transmissions and other power equipment to lubricate components and/or transfer power.
  • the present invention more particularly relates, but is not limited to, the area of cooling of transmission oil and/or engine oil in automotive applications. Numerous other applications exist in diverse areas such as railways, ships, aircraft, machine tool, power generation equipment and others.
  • ATF automotive transmission fluid
  • a device called a transmission oil cooler is conventionally used for that purpose.
  • a typical transmission cooler 3 is illustrated in an automotive application.
  • the exemplary application is shown to generally include an engine 4 and a transmission 5 .
  • the oil cooler 3 is typically located inside one of the tanks 2 of a radiator 1 .
  • the coolant inside the tanks 2 is used as the cooling medium for the oil cooler 3 . This is possible despite the fact that the coolant itself is relatively hot, because the oil temperature is substantially higher.
  • the temperature differential between the coolant in the radiator tank 2 and the oil in the oil cooler 3 is used to cool the oil.
  • the oil circulates through hydraulic lines 6 between the transmission 5 and the oil cooler 3 , and the oil gets cooled in the oil cooler 3 .
  • FIG. 2 illustrates one typical transmission oil cooler 3 in further detail.
  • the oil cooler 3 is located inside the tank 2 of radiator 1 .
  • This type of oil cooler which consists of concentric brass tubes between which the oil flows, is typically made by brazing, a high temperature process that requires expensive brazing equipment and complex process control. The result is a relatively expensive and heavy oil cooler.
  • FIG. 2A shows the cross section of the oil cooler.
  • FIG. 3 shows a more modern transmission oil cooler 3 ′.
  • the oil cooler 3 ′ is again located inside the tank 2 of radiator 1 .
  • This type of oil cooler 3 ′ is called a plate cooler, because it basically consists of several flat plates inside which the oil flows. Plate oil coolers are typically made using aluminum strips which are joined together along their perimeter in a brazing process. The use of flat plates leads to a better heat exchange performance than a concentric tube cooler, but the result is still a relatively expensive and heavy oil cooler. The very large number and length of brazed joints creates many potential failure modes (leaks), which has a potential negative impact on the reliability of this oil cooler.
  • FIG. 3A shows the cross section of the oil cooler.
  • FIG. 4 shows an engine oil cooler 7 , in addition to the previously shown transmission oil cooler 3 .
  • Some vehicles require both oil coolers. Virtually every vehicle with an automatic transmission requires a transmission oil cooler, and many high powered or high rpm engines require also an engine oil cooler. Typically the engine cooler and the transmission oil cooler are on two separate, independent cooling circuits.
  • the engine oil circulating through the engine oil cooler 7 is typically cooled by placing the oil cooler 7 in a housing that contains coolant. Another possibility (not shown here) is to place the engine oil cooler in the second radiator tank (the first one is already occupied by the transmission oil cooler). This finishes the description of the state of the art in oil coolers.
  • extruded aluminum tubes As the primary heat transfer mechanism.
  • the advantage of the extruded tubes is the simplification of the manufacturing process, as well as the reduction or elimination of potential failure modes (leaks), which directly impact reliability, production cost, testing cost and warranty costs.
  • the use of extruded tubes dramatically reduces the need to join surfaces through brazing in a watertight and oil tight manner. Since every joint in a pressurized heat exchanger is always a potential failure mode, the elimination or reduction in the number of joints provides a major reliability advantage.
  • the present invention uses a plurality of extruded tubes 8 to lead the oil from one oil cooler tank to the other oil cooler tank (one tank is the inlet tank of the oil cooler and the other one is the outlet tank of the oil cooler).
  • the oil cooler tanks are identical. One tank functions as an inlet tank and the other tank functions as an outlet tank. Typically the ends of the tanks are threaded or equipped with some type of connector that allows the connection to the hydraulic lines leading the oil.
  • the complete oil cooler is immersed in the cooling medium (the radiator coolant, typically a mixture of 50% water and 50% glycol). The heat of the oil is transferred through the tube walls to the cooling medium, so that the temperature of the oil leaving the oil cooler is significantly lower than the temperature of the oil flowing into the oil cooler.
  • the radiator coolant typically a mixture of 50% water and 50% glycol
  • An additional advantage of the extruded tubes used in this invention is the strength of the cross-section (see FIG. 6A).
  • the multiple bridges connecting the opposite walls of the tube to each other (called webs) provide high resistance to pressure, so that the oil cooler can handle the high test pressures (typically about 500 psi) to which the oil cooler will be subjected.
  • the oil cooler of the present invention provides a breakthrough in the manufacturing of oil coolers, with major cost and weight reductions as well as major improvements in reliability. Instead of having potential leaks along the brazed seams of each tube, as in a conventional flat plate oil cooler, now the only potential leak path is at the joint between tube and port. This represents a major reduction in potential failure modes.
  • FIG. 1 is a schematic illustration of a prior art transmission oil cooler circuit.
  • FIG. 2 is a view of a prior art conventional oil cooler of concentric tube design shown in partial section.
  • FIG. 2A is a cross-sectional view taken along the line 2 A- 2 A.
  • FIG. 3 is a view of another prior art oil cooler of plate design shown in partial section.
  • FIG. 3A is a cross-sectional view taken along the line 3 A- 3 A.
  • FIG. 4 is a schematic illustration of prior art engine oil cooler and transmission oil cooler circuits.
  • FIG. 5 is a top view of an oil cooler constructed in accordance with a first preferred embodiment of the present invention.
  • FIG. 6 is a side view of the oil cooler of FIG. 5.
  • FIG. 6A is a cross-sectional view taken along the line 6 A- 6 A.
  • FIG. 7 is a top view similar to FIG. 5, illustrating an oil cooler constructed in accordance with a first alternative embodiment.
  • FIG. 8 is a top view similar to FIG. 5, illustrating an oil cooler constructed in accordance with a second alternative embodiment.
  • FIG. 9 is a top view similar to FIG. 5, illustrating an oil cooler constructed in accordance with a third alternative embodiment.
  • FIG. 10A is a cross-sectional view of one of the tubes of the oil coolers of the present invention prior to any tube modification.
  • FIG. 10B is a cross-sectional view of the tube of FIG. 10A taken along a line perpendicular to the line of the FIG. 10A cross-section.
  • FIG. 11A is a cross-sectional view similar to FIG. 10A, illustrating a first tube modification.
  • FIG. 11B is a cross-sectional view of the tube of FIG. 11A taken along the line perpendicular to the line of the FIG. 11A cross-section.
  • FIG. 12A is a cross-sectional view similar to FIG. 10A, illustrating a second tube modification.
  • FIG. 12B is a cross-sectional view of the tube of FIG. 12A taken along the line perpendicular to the line of the FIG. 12A cross-section.
  • FIG. 13 is a side view of a portion of one of the tubes 16 modified in accordance with a third tube modification of the present invention.
  • FIG. 13A is a cross-sectional view taken along the line 13 A- 13 A.
  • FIG. 14 is a top view of an oil cooler similar to FIG. 5, the oil cooler including a plurality of tubes according to a fourth tube modification.
  • FIG. 15 is a side view of the oil cooler of FIG. 14.
  • FIG. 16 is a top view of an oil cooler similar in construction to the oil cooler of FIG. 14, the oil cooler alternatively including end tanks having a rectangular shape.
  • FIG. 17 is a side view of the oil cooler of FIG. 16.
  • FIG. 18 is a top view of an air-cooled oil cooler in accordance with the teachings of the present invention.
  • FIG. 19 is a side view of the oil cooler of FIG. 18.
  • an oil cooler constructed in accordance with the teachings of a first preferred embodiment of the present invention is illustrated and identified at reference character 10 .
  • the oil cooler 10 is shown to generally include first and second end tanks 12 and 14 .
  • the tanks 12 and 14 are round.
  • the end tanks 12 and 14 are connected by a plurality of tubes 16 .
  • the oil cooler 10 is shown to include five (5) tubes 16 .
  • the tubes are preferably brazed to the end tanks.
  • the first end tank 12 defines a first port 18 as the inlet of oil to be cooled and the second end tank 14 defines a second port 20 as the outlet.
  • the oil cooler 10 may be alternatively constructed to include any particular number of tubes 16 .
  • FIG. 7 illustrates a first alternative embodiment of the same type of oil cooler 30 as shown in FIG. 5 except three (3) tubes 16 are used when less heat transfer is required.
  • FIG. 8 illustrates a second alternative embodiment of the same type of oil cooler 32 as shown in FIG. 5 except four (4) tubes 16 are used.
  • FIG. 9 illustrates a third alternative embodiment of the same type of oil cooler 34 as shown in FIG. 5 except six (6) tubes 16 are used for greater heat transfer.
  • FIG. 10A is an enlarged cross-section of one of the tubes 16 before modification.
  • the tube 16 is shown to include a pair of sidewalls 38 and internal webs 40 connecting the sidewalls 38 .
  • the internal webs are incorporated to provide strength to the tube 16 to meet the requirement of high-pressure test the oil cooler 10 must pass for validation.
  • FIG. 10B is a cross-sectional view of tube 16 of FIG. 10A taken along a line perpendicular to the cross-sectional line of FIG. 10A.
  • FIGS. 11A and 11B illustrate one of the tubes 16 modified in accordance with a first tube modification.
  • the tube 16 has indentations 44 the full width of the tube 16 alternately spaced on both sides of the tube 16 . Turbulation of the flow through the tubes 16 occurs at each indentation 44 , increasing the heat transfer.
  • FIGS. 12A and 12B show a second tube modification.
  • Dimples 46 are formed alternately on both sides of the tubes 16 .
  • the dimples 16 can be of round, oval or other shapes as desired. Turbulation of the flow through the tubes 16 occurs at each dimple, increasing the heat transfer.
  • FIG. 13 and FIG. 13A illustrate one of the tubes 16 including a third tube modification.
  • dimples 46 are formed in one of the sidewalls 38 of the tube 16 in a staggered or zigzag pattern.
  • the opposite sidewall does not include any dimples.
  • the oil cooler 50 includes a plurality of tubes modified according to a fourth tube modification.
  • the tubes 16 are formed into a convoluted shape.
  • the multiple direction change of each tube 16 provides good turbulence for efficient heat transfer.
  • This oil cooler 50 again has round end tanks 12 and 14 .
  • Another tube modification not shown is the insertion of turbulators within the passages of the tube. These turbulators can be bent wire or bent metal strips, etc.
  • an oil cooler 52 similar in construction to the oil cooler of FIGS. 14 and 15 is illustrated.
  • the oil cooler 52 is constructed to include first and second end tanks 54 and 56 that are rectangular in shape. Other shapes of tanks are possible, such as oval, etc., without departing from the teachings of present invention.
  • an oil cooler 80 is illustrated that is air-cooled. This is an example of an oil cooler that is not immersed in a cooling liquid, as in all previous examples, but instead it releases its heat to the surrounding air, similar to a typical engine radiator.
  • the oil cooler 80 includes fins 82 placed between tubes 16 to provide additional cooling surface. End tanks 12 and 14 are shown as round in shape but can be rectangular, oval or any other shape desired.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • General Details Of Gearings (AREA)
US10/404,015 2002-04-25 2003-03-31 Oil cooler and production method Abandoned US20040173341A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US10/404,015 US20040173341A1 (en) 2002-04-25 2003-03-31 Oil cooler and production method
JP2006508721A JP2006522311A (ja) 2003-03-31 2004-02-11 乗物用のオイル・クーラー
DE212004000019U DE212004000019U1 (de) 2003-03-31 2004-02-11 Wärmetauscher
PCT/US2004/004157 WO2004093519A2 (en) 2003-03-31 2004-02-11 Heat exchanger and associated method
US11/140,670 US20050217833A1 (en) 2002-04-25 2005-05-27 Heat exchanger and associated method
US12/017,428 US20080173428A1 (en) 2003-03-31 2008-01-22 Automatic transmission fluid cooler and associated method

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US37592002P 2002-04-25 2002-04-25
US44808603P 2003-02-15 2003-02-15
US10/404,015 US20040173341A1 (en) 2002-04-25 2003-03-31 Oil cooler and production method

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US11/140,670 Continuation-In-Part US20050217833A1 (en) 2002-04-25 2005-05-27 Heat exchanger and associated method

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US20040173341A1 true US20040173341A1 (en) 2004-09-09

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US10/404,015 Abandoned US20040173341A1 (en) 2002-04-25 2003-03-31 Oil cooler and production method
US12/017,428 Abandoned US20080173428A1 (en) 2003-03-31 2008-01-22 Automatic transmission fluid cooler and associated method

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US12/017,428 Abandoned US20080173428A1 (en) 2003-03-31 2008-01-22 Automatic transmission fluid cooler and associated method

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JP (1) JP2006522311A (enExample)
DE (1) DE212004000019U1 (enExample)
WO (1) WO2004093519A2 (enExample)

Cited By (10)

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CN100585316C (zh) * 2007-11-19 2010-01-27 东莞吉旺汽车零件有限公司 一种油冷管的制作方法
EP2384837A3 (de) * 2010-05-03 2012-04-04 Benteler Automobiltechnik GmbH Verfahren zur Herstellung eines Wärmetauscherrohres und Wärmetauscher
US8573290B2 (en) 2010-03-08 2013-11-05 Alfa Laval Corporate Ab Spiral heat exchanger
US20140060784A1 (en) * 2012-08-29 2014-03-06 Adam Ostapowicz Heat exchanger including an in-tank oil cooler with improved heat rejection
US20160298886A1 (en) * 2013-07-08 2016-10-13 Mitsubishi Electric Corporation Heat exchanger and heat pump apparatus
IT201600121401A1 (it) * 2016-11-30 2018-05-30 Tol Group S R L Bollitore con piastre a zig zag per produzione e accumulo di acqua sanitaria calda.
US10106028B1 (en) * 2017-05-31 2018-10-23 GM Global Technology Operations LLC Internal transmission oil cooler mounting strategy
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US20210381592A1 (en) * 2019-11-19 2021-12-09 Frank C. Kuperman Transmission Cooler Thermal Bypass Device
US11994209B2 (en) 2019-11-19 2024-05-28 Revmax Performance, Llc Transmission cooler thermal bypass device

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DE102007054913A1 (de) * 2006-11-15 2008-08-28 Behr Gmbh & Co. Kg Wärmeübertrager
US20120004172A1 (en) * 2008-10-27 2012-01-05 Oncotherapy Science, Inc. Screening method of anti-lung or esophageal cancer compounds
JP5730722B2 (ja) * 2011-09-08 2015-06-10 トヨタ自動車株式会社 熱交換器
US9796244B2 (en) 2014-01-17 2017-10-24 Honda Motor Co., Ltd. Thermal management system for a vehicle and method
US20170051988A1 (en) 2015-08-21 2017-02-23 Halla Visteon Climate Control Corp. Heat exchanger with turbulence increasing features
DE102016205353A1 (de) * 2016-03-31 2017-10-05 Mahle International Gmbh Stapelscheibenwärmetauscher
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DE212004000019U1 (de) 2006-03-02
WO2004093519A3 (en) 2005-10-20
US20080173428A1 (en) 2008-07-24
JP2006522311A (ja) 2006-09-28

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