EP0275841A2 - Verfahren zur Herstellung eines Ventilsitzes - Google Patents

Verfahren zur Herstellung eines Ventilsitzes Download PDF

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Publication number
EP0275841A2
EP0275841A2 EP87830446A EP87830446A EP0275841A2 EP 0275841 A2 EP0275841 A2 EP 0275841A2 EP 87830446 A EP87830446 A EP 87830446A EP 87830446 A EP87830446 A EP 87830446A EP 0275841 A2 EP0275841 A2 EP 0275841A2
Authority
EP
European Patent Office
Prior art keywords
valve seat
obtaining
intake duct
milling
housing
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Withdrawn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
EP87830446A
Other languages
English (en)
French (fr)
Other versions
EP0275841A3 (de
Inventor
Luigi Joli
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 EP0275841A2 publication Critical patent/EP0275841A2/de
Publication of EP0275841A3 publication Critical patent/EP0275841A3/de
Withdrawn legal-status Critical Current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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
    • F02F1/4235—Shape or arrangement of intake or exhaust channels in cylinder heads of intake channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/22—Valve-seats not provided for in preceding subgroups of this group; Fixing of valve-seats
    • 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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis

Definitions

  • This invention concerns a process for obtaining a valve seat in an intake duct of an internal combustion engine.
  • the current process for obtaining a valve seat in an intake duct of an internal combustion engine consists in the following stages:
  • the purpose of the invention is to make this operation less expensive, while maintaining at least the same engine performance, but eliminat­ing the stage c. of the known process which is the most difficult to perform in as far as edges could remain due to the machining itself.
  • This purpose is achieved by a process for obtaining a valve seat in an intake duct of an internal combustion engine, characterized in that the process consists in the following machining stages:
  • 1 indicates a part of a light alloy cylinder head of an internal combustion engine cut away in correspon­dence of one of the intake ducts.
  • a housing 2 has been obtained, by milling or other suitable machining, at the exit of the feed duct, capable of receiving a valve seat 3 made for example from cast iron, which is put in place by driving.
  • the above valve seat has an inside diameter hole 4, substantially equal to the inside diameter of the intake duct at the point where the housing 2 is obtained.
  • it is equipped, at the time of driving it in, with a bilateral chamfer 5.
  • valve rest chamfer 6 is made, which has an inclination generally of 45 degrees and whose axis is coaxial with that of the valve guide 7.
  • the duct thus obtained eliminating the finishing operation on the junction point between valve seat and the duct itself, has a step 8 due to the difference between the two diameters resulting from the chamfer.
  • the above step being favourable to the direction of the feeding mixture flow, it does not hinder in any way the engine perfor­mance and at the same time prevents the formation, either by mere chance or as a result of poor machining, of adverse steps which, as it can be easily inferred, would be a hindrance to the free passage of the flow itself.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lift Valve (AREA)
  • Forging (AREA)
  • Rolling Contact Bearings (AREA)
EP87830446A 1986-12-23 1987-12-17 Verfahren zur Herstellung eines Ventilsitzes Withdrawn EP0275841A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT67963/86A IT1196870B (it) 1986-12-23 1986-12-23 Procedimento per l'ottenimento di una sede valvola
IT6796386 1986-12-23

Publications (2)

Publication Number Publication Date
EP0275841A2 true EP0275841A2 (de) 1988-07-27
EP0275841A3 EP0275841A3 (de) 1990-01-31

Family

ID=11306764

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87830446A Withdrawn EP0275841A3 (de) 1986-12-23 1987-12-17 Verfahren zur Herstellung eines Ventilsitzes

Country Status (4)

Country Link
EP (1) EP0275841A3 (de)
BR (1) BR8706933A (de)
IT (1) IT1196870B (de)
YU (1) YU47052B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4029881A1 (de) * 1990-09-21 1992-04-02 Porsche Ag Verfahren zum einpassen von ventilsitzringen in brennkraftmaschinen
EP0849463A1 (de) * 1996-12-21 1998-06-24 Daimler-Benz Aktiengesellschaft Zylinderkopf für Brennkraftmaschinen
WO1999032779A1 (en) * 1997-12-23 1999-07-01 Scania Cv Aktiebolag (Publ) Cylinder head for internal combustion engine
EP1967705A1 (de) * 2007-03-07 2008-09-10 Renault SAS Ventilsitz für Zuführleitung, Zylinderkopf eines Verbrennungsmotors und Herstellungsverfahren
FR2926111A3 (fr) * 2008-01-03 2009-07-10 Renault Sas Procede de realisation d'une culasse de moteur thermique comprenant une etape d'usinage d'un siege de soupape
US20170175670A1 (en) * 2015-12-17 2017-06-22 Yamaha Hatsudoki Kabushiki Kaisha Internal combustion engine, vehicle having the same, and method for manufacturing internal combustion engine
CN113557351A (zh) * 2019-03-13 2021-10-26 卡特彼勒公司 用于发动机缸盖的具有文丘里流动冠部和构形用于限制阀凹陷的座面的阀座插件

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR822334A (fr) * 1937-05-28 1937-12-28 Perfectionnements aux blocs de cylindres des moteurs à combustion interne
GB1042147A (en) * 1962-04-05 1966-09-14 Humber Ltd Improvements relating to cylinders or cylinder heads for internal combustion engines
DE2048567A1 (de) * 1969-10-02 1971-04-15 Parry, John, Orilha, Ontario (Kana da) Verfahren zum Ersetzen eines Ventil Sitzes in einem Zylinderkopf
AT331575B (de) * 1972-06-20 1976-08-25 List Hans Brennkraftmaschine mit innerer gemischbildung insbesondere dieselmotor
GB1494244A (en) * 1974-02-16 1977-12-07 Maschf Augsburg Nuernberg Ag Cylinder head for internal combustion engine
AT378827B (de) * 1983-06-23 1985-10-10 Avl Verbrennungskraft Messtech Brennkraftmaschine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR822334A (fr) * 1937-05-28 1937-12-28 Perfectionnements aux blocs de cylindres des moteurs à combustion interne
GB1042147A (en) * 1962-04-05 1966-09-14 Humber Ltd Improvements relating to cylinders or cylinder heads for internal combustion engines
DE2048567A1 (de) * 1969-10-02 1971-04-15 Parry, John, Orilha, Ontario (Kana da) Verfahren zum Ersetzen eines Ventil Sitzes in einem Zylinderkopf
AT331575B (de) * 1972-06-20 1976-08-25 List Hans Brennkraftmaschine mit innerer gemischbildung insbesondere dieselmotor
GB1494244A (en) * 1974-02-16 1977-12-07 Maschf Augsburg Nuernberg Ag Cylinder head for internal combustion engine
AT378827B (de) * 1983-06-23 1985-10-10 Avl Verbrennungskraft Messtech Brennkraftmaschine

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4029881A1 (de) * 1990-09-21 1992-04-02 Porsche Ag Verfahren zum einpassen von ventilsitzringen in brennkraftmaschinen
EP0849463A1 (de) * 1996-12-21 1998-06-24 Daimler-Benz Aktiengesellschaft Zylinderkopf für Brennkraftmaschinen
US6053141A (en) * 1996-12-21 2000-04-25 Daimlerchrysler Ag Cylinder head for internal-combustion engines
WO1999032779A1 (en) * 1997-12-23 1999-07-01 Scania Cv Aktiebolag (Publ) Cylinder head for internal combustion engine
US6240891B1 (en) 1997-12-23 2001-06-05 Scania Cv Aktiebolag (Publ) Cylinder head for internal combustion engine
EP1967705A1 (de) * 2007-03-07 2008-09-10 Renault SAS Ventilsitz für Zuführleitung, Zylinderkopf eines Verbrennungsmotors und Herstellungsverfahren
FR2913457A1 (fr) * 2007-03-07 2008-09-12 Renault Sas Siege de soupape pour conduit d'admission, culasse de moteur thermique, et procede de fabrication.
FR2926111A3 (fr) * 2008-01-03 2009-07-10 Renault Sas Procede de realisation d'une culasse de moteur thermique comprenant une etape d'usinage d'un siege de soupape
US20170175670A1 (en) * 2015-12-17 2017-06-22 Yamaha Hatsudoki Kabushiki Kaisha Internal combustion engine, vehicle having the same, and method for manufacturing internal combustion engine
CN113557351A (zh) * 2019-03-13 2021-10-26 卡特彼勒公司 用于发动机缸盖的具有文丘里流动冠部和构形用于限制阀凹陷的座面的阀座插件
CN113557351B (zh) * 2019-03-13 2024-03-05 卡特彼勒公司 用于发动机缸盖的具有文丘里流动冠部和构形用于限制阀凹陷的座面的阀座插件

Also Published As

Publication number Publication date
EP0275841A3 (de) 1990-01-31
YU229087A (en) 1990-02-28
YU47052B (sh) 1994-12-28
BR8706933A (pt) 1988-07-26
IT1196870B (it) 1988-11-25
IT8667963A0 (it) 1986-12-23

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