EP0926319A1 - Device for oil vapours separation from the crankcase of an internal combustion engine and connection for blow-by of said vapours - Google Patents

Device for oil vapours separation from the crankcase of an internal combustion engine and connection for blow-by of said vapours Download PDF

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Publication number
EP0926319A1
EP0926319A1 EP98122363A EP98122363A EP0926319A1 EP 0926319 A1 EP0926319 A1 EP 0926319A1 EP 98122363 A EP98122363 A EP 98122363A EP 98122363 A EP98122363 A EP 98122363A EP 0926319 A1 EP0926319 A1 EP 0926319A1
Authority
EP
European Patent Office
Prior art keywords
crankcase
separator
vapours
engine
base
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.)
Granted
Application number
EP98122363A
Other languages
German (de)
French (fr)
Other versions
EP0926319B1 (en
Inventor
Francesco Ferrazzi
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.)
Fiat Auto SpA
Original Assignee
Fiat Auto SpA
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 Fiat Auto SpA filed Critical Fiat Auto SpA
Publication of EP0926319A1 publication Critical patent/EP0926319A1/en
Application granted granted Critical
Publication of EP0926319B1 publication Critical patent/EP0926319B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • 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
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil

Definitions

  • the present invention refers to a device to separate oil vapours from the crankcase of an internal combustion engine (blow by) provided with manifolds for connection to the blow-by circuit of said vapours and of a manifold to let fresh oil in the crankcase sump.
  • the separator device for the blow-by oil vapours that come from the sump and from the crank chamber, is typically made as a separate part which is added to the engine when this one is being assembled.
  • One of the advantages of the present invention consists in that it presents two access manifolds to the separator from the crank chamber, said access manifolds being spaced and located on a plane parallel to the axis of the crankcase. This makes it possible to keep one manifold constantly free, even in the case the inclination of the engine is very high, so that no oil can be sucked into the crank chamber.
  • the reference number 2 indicates the crankcase of an internal combustion engine made by means of ground fusion.
  • the crankcase presents in-line cylinders and one crank chamber 5 on the side wall of the cylinders.
  • at least two passages 6 and 7 for the oil vapours are built by fusion in correspondence with the second and third bay of the crankcase. Said passages, which are positioned in order not to interfere with the connecting rods, and which lay, spaced, on a plane parallel to the longitudinal axis of the crankcase, make the crank chamber communicate with the external wall of the crankcase through the holes 9 and 10.
  • the holes 9 and 10 open inside a body forming the lower section, or base, 11, of a compartment for the separation 12 of oil vapours, said compartment being basically shaped as an equilateral triangle, in correspondence with the ends of one of its sides which is basically parallel to the plane defined by the upper face of the crankcase.
  • This separator built by fusion together with the crankcase, presents inside walls forming a labyrinth and one vertex pointing towards the lower part of the crankcase.
  • the upper section or cover 13 of the separator compartment which is made separately, again presents in its internal part the labyrinth pattern of the crankcase 11, and presents two manifolds 15 and 16, being the first one 15 adapted to carry vapours to the blow-by system and the second one 16 used as an inlet for fresh oil.
  • a passage 18, is made centrally, in correspondence with the vertex pointing downwards, in the separator 12 and in the wall of the crankcase, and a manifold 19 built by fusion and connected to it, allow to introduce oil in the engine sump.
  • the base and the cover of the separator are jointed by conventional means, i.e. screws, and a seal (not shown) can be put between them if necessary.
  • the two manifolds spaced and parallel to the axis of the crankcase, allow the suction of blow-by vapours to be always free, independently from the working position of the engine.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Abstract

Separator for oil vapour from the crankcase of an internal engine (blow-by) consisting of a base (11) and a cover (13); the base being made by fusion, integral with the crankcase (2) of the engine, in correspondence to one of its side walls.

Description

  • The present invention refers to a device to separate oil vapours from the crankcase of an internal combustion engine (blow by) provided with manifolds for connection to the blow-by circuit of said vapours and of a manifold to let fresh oil in the crankcase sump.
  • In the conventional internal combustion engines, the separator device for the blow-by oil vapours, that come from the sump and from the crank chamber, is typically made as a separate part which is added to the engine when this one is being assembled.
  • This procedure makes it necessary to build either ducts internal to the crankcase and a small support base for the separator, and to take into account the dimensions of it while placing the propulsor in the engine compartment.
  • It is an object of the present invention to give a solution to the aforementioned inconveniences.
  • Said object is achieved by means of a separator for blow-by vapours presenting the characteristics indicated in claim 1.
  • One of the advantages of the present invention consists in that it presents two access manifolds to the separator from the crank chamber, said access manifolds being spaced and located on a plane parallel to the axis of the crankcase. This makes it possible to keep one manifold constantly free, even in the case the inclination of the engine is very high, so that no oil can be sucked into the crank chamber.
  • Additional features and advantages of the present invention will become evident from the reading of the description of the accompanying drawings, provided as non-restrictive example, in which:
    • figure 1 is a part sectional perspective view of an internal combustion engine crankcase provided with the device of the invention illustrated in exploded view, and
    • figure 2 is a perspective view of the cover of the separator device of figure 1.
  • With reference to the figures, and especially to figure 1, the reference number 2 indicates the crankcase of an internal combustion engine made by means of ground fusion. The crankcase presents in-line cylinders and one crank chamber 5 on the side wall of the cylinders. In the case of a four in-line cylinder engine, here illustrated, at least two passages 6 and 7 for the oil vapours are built by fusion in correspondence with the second and third bay of the crankcase. Said passages, which are positioned in order not to interfere with the connecting rods, and which lay, spaced, on a plane parallel to the longitudinal axis of the crankcase, make the crank chamber communicate with the external wall of the crankcase through the holes 9 and 10. The holes 9 and 10 open inside a body forming the lower section, or base, 11, of a compartment for the separation 12 of oil vapours, said compartment being basically shaped as an equilateral triangle, in correspondence with the ends of one of its sides which is basically parallel to the plane defined by the upper face of the crankcase. This separator, built by fusion together with the crankcase, presents inside walls forming a labyrinth and one vertex pointing towards the lower part of the crankcase. The upper section or cover 13 of the separator compartment, which is made separately, again presents in its internal part the labyrinth pattern of the crankcase 11, and presents two manifolds 15 and 16, being the first one 15 adapted to carry vapours to the blow-by system and the second one 16 used as an inlet for fresh oil.
  • A passage 18, is made centrally, in correspondence with the vertex pointing downwards, in the separator 12 and in the wall of the crankcase, and a manifold 19 built by fusion and connected to it, allow to introduce oil in the engine sump.
  • A few notches 21, made in the walls of the labyrinth, allow the decantation oil to return to the sump through the manifold 19.
  • The base and the cover of the separator are jointed by conventional means, i.e. screws, and a seal (not shown) can be put between them if necessary.
  • In the way described above it is possible to achieve a compact and functional separator, without excessive need of tool machines, and at a very low cost.
  • Besides, as already mentioned before, the two manifolds, spaced and parallel to the axis of the crankcase, allow the suction of blow-by vapours to be always free, independently from the working position of the engine.

Claims (9)

  1. Separator for oil vapours from an internal combustion engine crankcase (blow-by) consisting of a base (11) and a cover (13), characterised in that the base (11), is made by means of fusion integral to the crankcase (2) of the engine in correspondence with one of its side walls.
  2. Separator as claimed in claim 1 characterised in that the base (11) is basically shaped as an equilateral triangle with one vertex pointing downwards and is provided with internal walls forming a labyrinth.
  3. Separator as claimed in claim 1 characterised in that the inner part of the base (11) is connected to the crank chamber of the engine through two manifolds (6, 7) made by fusion in the side wall of the crankcase.
  4. Separator as claimed in claim 3 characterised in that the manifolds (6, 7) end with holes (9, 10) made in the side wall of the crankcase in correspondence with the ends of the side of the base (11) which is basically parallel to the plane defined by the upper surface of the crankcase.
  5. Separator as claimed in claim 1 and 2 characterised in that the cover (13) is provided with internal walls which form the same labyrinth as the one existing on the base (11).
  6. Separator as claimed in claim 1 characterised in that the cover (13) presents a manifold (15) to carry the blow-by vapours to the throttle body of the engine feeding system.
  7. Separator as claimed in claim 1 characterised in that the cover (13) presents a manifold (16) to let fresh oil into the engine.
  8. Separator as claimed in claims 1 and 7 characterised in that said manifold is connected to the engine sump through a passage (18) made in the separator in correspondence with the vertex pointing downwards and through a manifold (19) made by fusion in the crankcase wall (2)
  9. Separator as claimed in the previous claims characterised in that notches (21) for the passage of decantation oil are made in the walls forming the labyrinth.
EP19980122363 1997-12-23 1998-11-25 Device for oil vapours separation from the crankcase of an internal combustion engine and connection for blow-by of said vapours Expired - Lifetime EP0926319B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO971133 IT1305593B1 (en) 1997-12-23 1997-12-23 OIL VAPOR SEPARATOR DEVICE FROM THE BASE OF AN INTERNAL COMBUSTION ENGINE AND CONNECTION FOR THE RECIRCULATION OF SUCH VAPORS
ITTO971133 1997-12-23

Publications (2)

Publication Number Publication Date
EP0926319A1 true EP0926319A1 (en) 1999-06-30
EP0926319B1 EP0926319B1 (en) 2002-10-23

Family

ID=11416229

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980122363 Expired - Lifetime EP0926319B1 (en) 1997-12-23 1998-11-25 Device for oil vapours separation from the crankcase of an internal combustion engine and connection for blow-by of said vapours

Country Status (4)

Country Link
EP (1) EP0926319B1 (en)
DE (1) DE69808877T2 (en)
ES (1) ES2182206T3 (en)
IT (1) IT1305593B1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003102388A1 (en) 2002-05-30 2003-12-11 J.C. Bamford Excavators Limited Reciprocating piston internal combustion engines
EP1447532A2 (en) * 2003-02-17 2004-08-18 Nifco Inc. Blow by gas oil separating device
DE10108771B4 (en) * 2000-02-25 2006-08-24 Suzuki Kabushiki Kaisha Japanese Company, Hamamatsu motorcycle
WO2007015106A1 (en) * 2005-08-04 2007-02-08 Ec Power A/S Separator
US7343833B2 (en) 2003-05-19 2008-03-18 Fuji Jukogyo Kabushiki Kaisha Breather apparatus of crankcase
AT503763B1 (en) * 2007-07-17 2009-01-15 Avl List Gmbh INTERNAL COMBUSTION ENGINE WITH A CRANKCASE FOR SEVERAL CYLINDER
WO2009081260A1 (en) * 2007-12-21 2009-07-02 Toyota Jidosha Kabushiki Kaisha Oil separation device
DE102010004910A1 (en) * 2010-01-19 2011-07-21 GM Global Technology Operations LLC, ( n. d. Ges. d. Staates Delaware ), Mich. Oil separation
FR2985769A1 (en) * 2012-01-12 2013-07-19 Peugeot Citroen Automobiles Sa Engine block for internal combustion engine that is utilized for driving car, has de-oiling conduit comprising set of baffles for collecting oil, where baffles protrude from partition wall and guides collected oil to openings of wall
DE102013008117A1 (en) * 2013-05-11 2014-11-13 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Engine part for an internal combustion engine and internal combustion engine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1124307A (en) * 1954-06-03 1956-10-09 Internal combustion engine
EP0287756A2 (en) * 1987-04-18 1988-10-26 Dr.Ing.h.c. F. Porsche Aktiengesellschaft De-aeration device with integrated oil separator
EP0291358A2 (en) * 1987-05-15 1988-11-17 Honda Giken Kogyo Kabushiki Kaisha Internal combustion engine
US4953525A (en) * 1988-09-30 1990-09-04 Yamaha Hatsudoki Kabushiki Kaisha Cooling system for V type engine
US5474035A (en) * 1994-07-08 1995-12-12 Outboard Marine Corporation Engine breather construction
US5697350A (en) * 1996-03-02 1997-12-16 Mercedes-Benz Ag Crank chamber venting arrangement for an internal combustion engine
EP0837236A1 (en) * 1996-10-16 1998-04-22 Honda Giken Kogyo Kabushiki Kaisha Oil pan and bearings structure for crankshaft

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1124307A (en) * 1954-06-03 1956-10-09 Internal combustion engine
EP0287756A2 (en) * 1987-04-18 1988-10-26 Dr.Ing.h.c. F. Porsche Aktiengesellschaft De-aeration device with integrated oil separator
EP0291358A2 (en) * 1987-05-15 1988-11-17 Honda Giken Kogyo Kabushiki Kaisha Internal combustion engine
US4953525A (en) * 1988-09-30 1990-09-04 Yamaha Hatsudoki Kabushiki Kaisha Cooling system for V type engine
US5474035A (en) * 1994-07-08 1995-12-12 Outboard Marine Corporation Engine breather construction
US5697350A (en) * 1996-03-02 1997-12-16 Mercedes-Benz Ag Crank chamber venting arrangement for an internal combustion engine
EP0837236A1 (en) * 1996-10-16 1998-04-22 Honda Giken Kogyo Kabushiki Kaisha Oil pan and bearings structure for crankshaft

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10108771B4 (en) * 2000-02-25 2006-08-24 Suzuki Kabushiki Kaisha Japanese Company, Hamamatsu motorcycle
WO2003102388A1 (en) 2002-05-30 2003-12-11 J.C. Bamford Excavators Limited Reciprocating piston internal combustion engines
EP1447532A2 (en) * 2003-02-17 2004-08-18 Nifco Inc. Blow by gas oil separating device
EP1447532A3 (en) * 2003-02-17 2005-10-12 Nifco Inc. Blow by gas oil separating device
US7343833B2 (en) 2003-05-19 2008-03-18 Fuji Jukogyo Kabushiki Kaisha Breather apparatus of crankcase
WO2007015106A1 (en) * 2005-08-04 2007-02-08 Ec Power A/S Separator
AT503763B1 (en) * 2007-07-17 2009-01-15 Avl List Gmbh INTERNAL COMBUSTION ENGINE WITH A CRANKCASE FOR SEVERAL CYLINDER
WO2009081260A1 (en) * 2007-12-21 2009-07-02 Toyota Jidosha Kabushiki Kaisha Oil separation device
DE102010004910A1 (en) * 2010-01-19 2011-07-21 GM Global Technology Operations LLC, ( n. d. Ges. d. Staates Delaware ), Mich. Oil separation
FR2985769A1 (en) * 2012-01-12 2013-07-19 Peugeot Citroen Automobiles Sa Engine block for internal combustion engine that is utilized for driving car, has de-oiling conduit comprising set of baffles for collecting oil, where baffles protrude from partition wall and guides collected oil to openings of wall
DE102013008117A1 (en) * 2013-05-11 2014-11-13 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Engine part for an internal combustion engine and internal combustion engine

Also Published As

Publication number Publication date
ES2182206T3 (en) 2003-03-01
EP0926319B1 (en) 2002-10-23
IT1305593B1 (en) 2001-05-09
ITTO971133A1 (en) 1999-06-23
DE69808877D1 (en) 2002-11-28
DE69808877T2 (en) 2003-08-07

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