EP1731725A2 - Ölwanne für Brennkraftmaschine und Verfahren zu deren Herstellung - Google Patents

Ölwanne für Brennkraftmaschine und Verfahren zu deren Herstellung Download PDF

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Publication number
EP1731725A2
EP1731725A2 EP06011429A EP06011429A EP1731725A2 EP 1731725 A2 EP1731725 A2 EP 1731725A2 EP 06011429 A EP06011429 A EP 06011429A EP 06011429 A EP06011429 A EP 06011429A EP 1731725 A2 EP1731725 A2 EP 1731725A2
Authority
EP
European Patent Office
Prior art keywords
oil
oil pan
pan structure
suction tube
connection means
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.)
Withdrawn
Application number
EP06011429A
Other languages
English (en)
French (fr)
Other versions
EP1731725A3 (de
Inventor
Giampaolo Benussi
Franco Benussi
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1731725A2 publication Critical patent/EP1731725A2/de
Publication of EP1731725A3 publication Critical patent/EP1731725A3/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/0004—Oilsumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/0004—Oilsumps
    • F01M2011/007—Oil pickup tube to oil pump, e.g. strainer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/0004—Oilsumps
    • F01M2011/0091—Oilsumps characterised by used materials

Definitions

  • the present invention finds application in the automotive field and relates to an oil pan structure for internal combustion engines of vehicles, particularly motor vehicles, according to the preamble of claim 1.
  • a further aspect of the invention relates to a method of making such pan structure.
  • the oil pan of an internal combustion engine is part of lubricating circuit of the same engine and has the specific function of collecting the hot lubricating oil outflowing from the engine and acting as a reservoir wherefrom oil is sucked by the circulation pump, the latter being typically driven directly by the engine by means of a kinematic device.
  • the oil pan is generally placed under the engine block thereby closing it.
  • the pan structure has to withstand many stresses, particularly vibrations transmitted from the engine connected thereto, shocks produced by any object on the roadway, e.g. stones, as well as stresses caused by oil itself contained.
  • lubricating oil is not chemically inert, and particularly can corrode organic materials, such as polymers, against which it is particularly aggressive at typical engine operating temperatures, i.e. above 100°C.
  • prior art oil pans are generally made of a metal material, e.g. of steel sheet, or by alluminum alloys die cast.
  • This oil pan is formed with a sheet-metal box-like receptacle attached to the engine block by a "floating" fixation arrangement, to allow relative motion between the block and the oil pan and dampen some of the stresses transmitted from the engine, and with a metal suction tube inside it with an end secured to the bottom wall of the receptacle, so as to be always dipped in oil and the other end having a quick-connect conformation, for easy coupling to the corresponding suction tube of the circulation pump.
  • the upper edge of the receptacle is folded back on itself and a housing is formed therein for a seal.
  • the end of the suction tube that is dipped in oil contains a perforated metal sheet filter member, for retaining any foreign bodies.
  • a drawback of this prior art pan is its considerable weight, essentially due to its being made of a metal material, as well as the high cost of the assembly.
  • EP-B-1041253 a polypropylene oil pan with reinforcement webs and ribs having a thermoplastic elastomer coating for taking up external stresses is disclosed.
  • a drawback of this prior art oil pan is the poor resistance of polypropylene to mechanical and thermal stresses at high and low operating temperatures.
  • thermoplastic pan optionally reinforced with glass, carbon or metal fibers, which is formed by direct molding onto a preferably metal support structure.
  • a drawback of this prior art pan is the fact that it is not well suited for engines of motor vehicles, in which a highly reliable and accessible lubrication system is required.
  • the main object of this invention is to obviate the above drawbacks, by providing an oil pan structure for internal combustion engines of vehicles, particularly commercial and industrial vehicles, having high performance, simple construction and low cost properties.
  • a particular object is to provide a particularly light-weight oil pan structure.
  • a further object of the invention is to provide an oil pan structure that has a minimized number of parts and can be sold in a ready-to-mount preassembled configuration.
  • Another particular object of the invention is to provide an oil pan structure that can be easily and quickly un-mounted and remounted for maintenance purposes.
  • an oil pan structure for internal combustion engines particularly for motor vehicles, which, as defined in claim 1, comprises a box-like oil receptacle, formed by a tray having side walls, a bottom wall, an edge with an attachment portion to be anchored to the engine block by suitable fastening means, an oil suction tube extending from the top of said edge into said receptacle, having a first end to be connected to said edge by upper connection means, and a second end to be connected to said bottom wall or said side walls by lower connection means, characterized in that said box-like receptacle, said suction tube, said attachment portion and said connection means are made from a substantially rigid thermoplastic mixture, capable of resisting to oil corrosion and to mechanical or thermal stresses caused by the engine and the roadbed in a temperature range from -40°C to +150°C.
  • a method for making said oil pan structure which, as defined in claim 19, is characterized in that it comprises a step a) of injection molding of a tray having a bottom wall, side walls, an edge with an attachment portion, lower connection means with a plurality of apertures capable to retain oil impurities; a step b) of insertion of metal bushes in the attachment portion of the pan to the engine block; a step c) of injection molding of a suction tube with upper connection means, having a first quick-connect end for connection to the oil suction tube and a second substantially bell-shaped end for connection to the lower connection means; a step d) of placement of said suction tube in said tray.
  • a particularly inexpensive and light-weight oil pan may be provided, which comprises a few parts, resists to oil action, may be easily un-mounted and remounted on engines of commercial vehicles and requires short times for engine maintenance and repair.
  • an oil pan structure for internal combustion engines of vehicles is shown, generally designated by numeral 1, which may be mounted to the underside of an internal combustion engine block in commercial vehicles.
  • the oil pan structure 1 essentially comprises a box-like oil receptacle 2, formed by a tray 3 consisting of a bottom wall 4 and side walls 5.
  • the upper edge 6 of the walls 5 is outwardly folded back on itself and has an attachment portion 7 anchorable to the engine block, the latter not being shown in the annexed figures, using suitable fastening means 8.
  • the pan structure 1 further comprises an oil suction tube 9 which extends within the perimeter of the edge 6 from the top of said edge 6 into the tray 3 to the bottom wall 4.
  • the tube 9 has a first end 10 in the proximity of the upper edge 6, which may be connected thereto by upper connection means 11, and a second end 12 associated to the bottom wall 4, or the side walls 5, and connectable thereto by lower connection means 13.
  • the box-like receptacle 2, the suction tube 9, the attachment portion 7 and the connection means 11 and 13 are made of a substantially rigid thermoplastic material capable of resisting to oil corrosion and other mechanical and thermal stresses caused by the engine and the roadbed.
  • thermoplastic material of the invention can resist to corrosion and mechanical stresses induced by the engine and the roadbed in a temperature range from -40°C to +150°C, that is the temperature range in which the engine is lubricated, even when the top of the range is reached abruptly, for instance after the starting of the engine in particularly cold weather conditions.
  • thermoplastic mixture is a polyamide-based mixture selected from the group comprising nylon 6 (polycaprolactam) and nylon 66 (poly-1,6-hexamethylene adipoamide) and mixtures thereof, and contains glass fibers and/or mineral fillers selected from the group comprising phyllosilicates such as talc or mica and/or carbonates such as calcium carbonate.
  • Glass fibers are preferably contained in polyamide in amounts from 5% to 50% by weight and preferably from 30% to 40% by weight.
  • the edge 6 of the tray 3 is outwardly folded back and has an attachment portion 7 for anchorage to the engine block on which the pan is mounted.
  • Such portion 7 comprises ring-like apertures 14 for the passage of the fastening means 8, e.g. bolts 15.
  • metal bushes 16 are introduced in the these through apertures to prevent the tightening torque from being weakened, due to relaxation of the plastic material with time, on which bushes the bolts are tightened.
  • the upper edge 6 of the tray 3 defines a housing 17 for a seal to be interposed between the oil pan structure 1 and the engine block.
  • the upper connection means 11 associated to the first end 10 of the oil suction tube 9 may be formed with of one or more brackets 18 which are designed to fit the edge 6, thereby connecting the first end 10 of the suction tube 9 to the tray 3.
  • brackets 18 that form the upper connection means 11 and the suction tube 9 are made from the same plastic material, by a single injection molding step.
  • the first end 10 of the tube 9 comprises means 19 for quick snap connection of the tube 9 to the suction tube of the engine oil pump, not shown.
  • the lower connection means 13 for fastening the tube 9 to the bottom wall 4 comprise a wall 20 that has a closed, preferably substantially circular plan shape, and extends substantially perpendicularly from the bottom wall 4 into the receptacle 2.
  • a plurality of substantially vertical apertures 21 is formed in the wall 20.
  • the lower connection means 13 further comprise a substantially flat baffle 22, having an aperture 23 for the passage of oil from the tray 3 to the suction tube 9.
  • the second end 12 of the suction tube 9 is substantially bell-shaped, with the edge 24 adapted for quick connection with the vertical wall 20.
  • a waste oil drain aperture 25 is provided in the bottom wall 4, and is closed by the plug 26.
  • the receptacle 27 for the plug 26 may be made of metal or plastic and is inserted or co-molded in the bottom wall 4.
  • the closing plug 26 may be also made of a thermoplastic material.
  • a method for making the above oil pan structure 1 consists of a plurality of successive steps, comprising a step a) of one-step injection molding of a tray 3 having a bottom wall 4, side walls 5, an edge 6 with an attachment portion 7, lower connection means 13 with a plurality of apertures 21 and the receptacle 27 for the plug 26; a step b) of insertion of metal bushes 16 in the holes 14 of the attachment portion 7 to the engine block; a step c) of forming by one-step injection molding a suction tube 9 with upper connection means 11, having the first end 10 conformed for quick-connection to the oil suction tube and the second end substantially bell-shaped for connection to the lower connection means 13 and a step d) of placement of the tube 9 in the tray 3.
  • the method may further comprise an additional step e) of insertion of the metal receptacle 27 for the plug 26 in the opening 25.
  • the oil pan structure of the invention is mounted to the engine block by first positioning the tube 9 between the connections 11 and 13, then fastening the quick snap connection means 19 of the first end 10 of the tube 9 to the oil suction tube of the engine block and finally inserting and tightening the connection members 15 in the holes 14 at corresponding holes on the engine block.
  • oil pan structure of the invention is susceptible of a number of changes and variants, within the inventive concept disclosed in the appended claims. All the details thereof may be replaced by other technically equivalent parts, without departure from the scope of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
EP06011429A 2005-06-06 2006-06-01 Ölwanne für Brennkraftmaschine und Verfahren zu deren Herstellung Withdrawn EP1731725A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITBS20050067 ITBS20050067A1 (it) 2005-06-06 2005-06-06 Coppa olio per motore di veicoli e suo metodo di realizzazione

Publications (2)

Publication Number Publication Date
EP1731725A2 true EP1731725A2 (de) 2006-12-13
EP1731725A3 EP1731725A3 (de) 2010-06-23

Family

ID=37027657

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06011429A Withdrawn EP1731725A3 (de) 2005-06-06 2006-06-01 Ölwanne für Brennkraftmaschine und Verfahren zu deren Herstellung

Country Status (2)

Country Link
EP (1) EP1731725A3 (de)
IT (1) ITBS20050067A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010101766A1 (en) * 2009-03-04 2010-09-10 Cummins Inc. Reversible oil pan with integrated oil suction tube
CN106014529A (zh) * 2016-07-13 2016-10-12 青岛华涛汽车模具有限公司 一种塑料油底壳总成
US9540972B2 (en) 2007-07-07 2017-01-10 Basf Se Article having impact resistant surface
DE102015113001A1 (de) 2015-08-07 2017-02-09 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Anordnung einer Ölwanne einer Brennkraftmaschine eines Kraftfahrzeugs und Verfahren zur Montage einer Ölwanne einer Brennkraftmaschine
US10012117B2 (en) 2013-10-08 2018-07-03 Basf Se Structural oil pan
US10195770B2 (en) 2013-10-08 2019-02-05 Basf Se Method of forming a structural oil pan via lost core molding
FR3102208A1 (fr) * 2019-10-22 2021-04-23 Renault S.A.S Dispositif de refroidissement

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3838250C1 (de) * 1988-11-11 1990-01-18 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart, De
JP2000337123A (ja) * 1999-05-24 2000-12-05 Yamaha Motor Co Ltd エンジン装置
US6523561B2 (en) * 2001-01-24 2003-02-25 Federal-Mogul World Wide, Inc. Snap-together filter system for transmission oil pan and method of manufacture
US6584950B1 (en) * 2002-05-29 2003-07-01 Bayer Corporation Oil pan

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9540972B2 (en) 2007-07-07 2017-01-10 Basf Se Article having impact resistant surface
WO2010101766A1 (en) * 2009-03-04 2010-09-10 Cummins Inc. Reversible oil pan with integrated oil suction tube
GB2480199A (en) * 2009-03-04 2011-11-09 Cummins Inc Reversible oil pan with integrated oil suction tube
US10012117B2 (en) 2013-10-08 2018-07-03 Basf Se Structural oil pan
US10195770B2 (en) 2013-10-08 2019-02-05 Basf Se Method of forming a structural oil pan via lost core molding
DE102015113001A1 (de) 2015-08-07 2017-02-09 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Anordnung einer Ölwanne einer Brennkraftmaschine eines Kraftfahrzeugs und Verfahren zur Montage einer Ölwanne einer Brennkraftmaschine
DE102015113001B4 (de) * 2015-08-07 2021-02-04 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Anordnung einer Ölwanne einer Brennkraftmaschine eines Kraftfahrzeugs und Verfahren zur Montage einer Ölwanne einer Brennkraftmaschine
CN106014529A (zh) * 2016-07-13 2016-10-12 青岛华涛汽车模具有限公司 一种塑料油底壳总成
CN106014529B (zh) * 2016-07-13 2018-01-30 青岛华涛汽车模具有限公司 一种塑料油底壳总成
FR3102208A1 (fr) * 2019-10-22 2021-04-23 Renault S.A.S Dispositif de refroidissement

Also Published As

Publication number Publication date
ITBS20050067A1 (it) 2006-12-07
EP1731725A3 (de) 2010-06-23

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