EP1321635A1 - Oelruckführungsleitung in einer Brennkraftmaschine - Google Patents

Oelruckführungsleitung in einer Brennkraftmaschine Download PDF

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Publication number
EP1321635A1
EP1321635A1 EP01850221A EP01850221A EP1321635A1 EP 1321635 A1 EP1321635 A1 EP 1321635A1 EP 01850221 A EP01850221 A EP 01850221A EP 01850221 A EP01850221 A EP 01850221A EP 1321635 A1 EP1321635 A1 EP 1321635A1
Authority
EP
European Patent Office
Prior art keywords
oil
cylinder block
oil drainage
drainage passage
crankcase
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Withdrawn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
EP01850221A
Other languages
English (en)
French (fr)
Inventor
Staffan Rengmyr
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.)
Ford Global Technologies LLC
Original Assignee
Ford Global Technologies 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 Ford Global Technologies LLC filed Critical Ford Global Technologies LLC
Priority to EP01850221A priority Critical patent/EP1321635A1/de
Publication of EP1321635A1 publication Critical patent/EP1321635A1/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Withdrawn legal-status Critical Current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
    • F01M11/02—Arrangements of lubricant conduits

Definitions

  • the present invention relates to an internal combustion engine comprising a cylinder head mounted upon the cylinder block; a crankcase containing a supply of oil for lubricating the engine; and at least one oil drainage passage extending from the cylinder head under a camshaft cover arranged above the cylinder head and through the cylinder head and the cylinder block.
  • Internal combustion engines are provided with oil passages in the cylinder block and the cylinder head for transporting lubricating oil to and from different lubrication points such as bearings and friction surfaces in the engine.
  • a supply for the lubricating oil is arranged in the crankcase in the bottom part of the engine.
  • the engine is provided with an oil pump for pumping the oil from the oil supply, through oil supply passages in the cylinder block and the cylinder head, and to the different lubrication points in the engine. When the oil has passed the lubrication points, it flows back to the oil supply in the crankcase through oil drainage passages.
  • a known internal combustion engine is disclosed in US,A,4 493 295.
  • Two vertically arranged oil drainage passages extend from the cylinder head under a camshaft cover arranged above the cylinder head and through the cylinder head and the cylinder block and emerge into the crankcase at a position above a crankshaft in the engine.
  • Ventilation passages extend parallel to the oil drainage passages and are separated from the oil drainage passages. In this manner oil returning from the cylinder head is prevented from being mixed with the ventilated air.
  • Oil supply passages are defined in the cylinder block extending through the joined surfaces of bearing bridges in the crankcase. Knock pins or dowels are inserted into the supply passages for relatively position the bearing bridges to each other. The dowels are provided with a bore for defining an oil passage.
  • the present solution to the problem caused by the contact between the returning oil and the rotating crankshaft is to reduce or eliminate this contact and thereby reduce the mixing of oil and air in the crankcase which leads to an increased oil consumption.
  • the oil drainage passage emerges into the crankcase at a position below the center axis of the crankshaft the returning oil is prevented to hit the crankshaft. Instead of getting into contact with the crankshaft, the returning oil is directly guided back to the oil supply in the crankcase.
  • the cylinder block comprises two parts defining bearing halves for the crankshaft and that said oil drainage passage extends through the joined surfaces of the two parts. In this way the returning oil is guided back to the crankcase at a level below the crankcase.
  • a fixating dowel is inserted into the oil drainage passage across the joined surfaces of the two parts and the dowel is provided with a bore defining an oil passage through the dowel. Since the cylinder block is divided into two parts dowels are arranged to fixate the parts in relation to each other. A cylinder block contains a lot of passages for oil, cooling water and crankcase ventilation. When oil passages are arranged trough the fixating dowels the available volume of the cylinder block is used in an optimized manner.
  • Fig. 1 is an exploded view in perspective of an internal combustion engine 1 according to the present invention.
  • the internal combustion engine 1 is in this embodiment an inline-6 cylinder engine.
  • the engine 1 comprises a cylinder block 2, a cylinder head 3 mounted upon the cylinder block 2 and a camshaft cover 4 arranged above the cylinder head 3.
  • the cylinder head 3 is only partly disclosed in Fig. 1.
  • a crankcase 5 is formed in the bottom part of the cylinder block 2 .
  • the crankcase 5 defines a space containing a supply of oil for lubricating the engine 1.
  • the cylinder block 2 is provided with six cylinder bores 7 in which reciprocating pistons 8 are arranged. Also the cylinder head 3 is provided with cylinder bores 7. Each piston 8 is connected to a crankshaft 9 arranged in the crankcase 5.
  • the engine 1 is provided with oil drainage passages 10 for guiding the lubricating or engine oil from different lubricating points, such as bearings and friction surfaces in the engine.
  • the cylinder block 2 according to the embodiment disclosed in Fig. 1 is provided with four vertically arranged oil drainage passages 10. Each oil drainage passage 10 extends from the cylinder head 3 under the camshaft cover 4 arranged above the cylinder head 3 and through the cylinder head 3 and the cylinder block 2. The oil drainage passages 10 emerge into the crankcase 5.
  • crankcase ventilation arrangement 11 Due to the rotating motion of the crankshaft 9 when the returning oil from the oil drainage passages 10 hits the crankshaft 9, oil particles may be mixed with the air in the crankcase 5. An excessive amount of oil drops or oil particles may therefore be removed from the crankcase 5 through a crankcase ventilation arrangement 11. As a result there will be an increase in the oil consumption, since the ventilated air and oil mixture is guided through the ventilation arrangement 11 to the combustion chambers 13 of the engine. Therefore the oil drainage passages 10 according to the present invention emerge into the crankcase 5 at a position or level below the center axis 14 of the crankshaft 9 in the engine, which is disclosed in fig. 2.
  • Fig. 2 is a section view of the cylinder block 2 disclosed in fig. 1.
  • an oil drainage passage 10 extends essentially parallel to the cylinders 7 and the oil drainage passage 10 follows an essentially straight line.
  • the cylinder block 2 comprises two parts 15, 16 defining bearing halves 12 for the crankshaft 9.
  • the oil drainage passage 10 extends through the joined surfaces 17, 18 of the two parts 15, 16.
  • a fixating dowel 19 is inserted into the oil drainage passage 10 across the joined surfaces 17, 18 of the two parts 15, 16 and the dowel 19 is provided with a bore 20 defining an oil passage through the dowel 19. Since the cylinder block 2 is divided into two parts 15, 16 dowels 19 are arranged to fixate the parts 15, 16 in relation to each other.
  • a fixating dowel 19 is arranged in each oil drainage passage 10.
  • a cylinder block contains a lot of passages for oil, cooling water and crankcase ventilation.
  • oil passages are arranged trough the fixating dowels 19 the available volume of the cylinder block 2 is used in an optimized manner.
  • the joined surfaces 17, 18 of the two parts 15, 16 essentially coincide with the center axis 14 of the crankshaft 9 and the two parts 15, 16 are attached to each other by means of threaded bolts 21.
  • Fig. 3 is a view from above of the cylinder block 2 according to the present invention.
  • the vertical oil drainage passages 10 are arranged substantially between and offset to the cylinders 7.
  • five crankcase ventilation passages 22 are arranged in the block 2.
  • the oil drainage passages 10 extend essentially parallel to the ventilation passages 22 and are in this way separated from the ventilation passages 22. As a result of this separation oil returning from the cylinder head 3 and into the crankcase 5 is prevented from being mixed with the ventilated air in the ventilation passages 22.
  • Fig. 4 is a view from the underside of the upper part 15 of the cylinder block 2 disclosed in fig. 3.
  • One of the bearing halves 12 for the crankshaft are disclosed in this figure.
  • the oil drainage passages 10 are disclosed.
  • the outer surface 25 of the upper part 15 of the cylinder block 2 forms a frame, which is intended to cooperate with a corresponding surface of the lower part 16 of the cylinder block 2, so that a sealed space is defined, forming the crankcase 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
EP01850221A 2001-12-21 2001-12-21 Oelruckführungsleitung in einer Brennkraftmaschine Withdrawn EP1321635A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01850221A EP1321635A1 (de) 2001-12-21 2001-12-21 Oelruckführungsleitung in einer Brennkraftmaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01850221A EP1321635A1 (de) 2001-12-21 2001-12-21 Oelruckführungsleitung in einer Brennkraftmaschine

Publications (1)

Publication Number Publication Date
EP1321635A1 true EP1321635A1 (de) 2003-06-25

Family

ID=8184906

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01850221A Withdrawn EP1321635A1 (de) 2001-12-21 2001-12-21 Oelruckführungsleitung in einer Brennkraftmaschine

Country Status (1)

Country Link
EP (1) EP1321635A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008014828A1 (de) * 2008-03-18 2009-09-24 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Brennkraftmaschine
DE102011008988A1 (de) 2011-01-20 2012-07-26 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Brennkraftmaschine sowie Verwendung eines Passstifts
US10760458B2 (en) 2017-10-26 2020-09-01 Ford Global Technologies, Llc Grooved alignment dowel and engine assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2172061A (en) * 1984-11-28 1986-09-10 Honda Motor Co Ltd A crankshaft supporting structure
EP0240120A2 (de) * 1986-03-15 1987-10-07 Austin Rover Group Limited Brennkraftmaschine
US5727512A (en) * 1994-12-20 1998-03-17 Rover Group Limited Internal combustion engine
US5852992A (en) * 1997-11-24 1998-12-29 Ford Global Technologies, Inc. Internal combuston engine having separated cylinder head oil drains and crankcase ventilation passages

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2172061A (en) * 1984-11-28 1986-09-10 Honda Motor Co Ltd A crankshaft supporting structure
EP0240120A2 (de) * 1986-03-15 1987-10-07 Austin Rover Group Limited Brennkraftmaschine
US5727512A (en) * 1994-12-20 1998-03-17 Rover Group Limited Internal combustion engine
US5852992A (en) * 1997-11-24 1998-12-29 Ford Global Technologies, Inc. Internal combuston engine having separated cylinder head oil drains and crankcase ventilation passages

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008014828A1 (de) * 2008-03-18 2009-09-24 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Brennkraftmaschine
DE102011008988A1 (de) 2011-01-20 2012-07-26 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Brennkraftmaschine sowie Verwendung eines Passstifts
US10760458B2 (en) 2017-10-26 2020-09-01 Ford Global Technologies, Llc Grooved alignment dowel and engine assembly

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