WO2001061178A1 - Method for producing a cylinder head for an internal combustion engine - Google Patents

Method for producing a cylinder head for an internal combustion engine Download PDF

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Publication number
WO2001061178A1
WO2001061178A1 PCT/EP2001/000925 EP0100925W WO0161178A1 WO 2001061178 A1 WO2001061178 A1 WO 2001061178A1 EP 0100925 W EP0100925 W EP 0100925W WO 0161178 A1 WO0161178 A1 WO 0161178A1
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WO
WIPO (PCT)
Prior art keywords
cylinder head
volume
combustion chamber
determined
s0ll
Prior art date
Application number
PCT/EP2001/000925
Other languages
German (de)
French (fr)
Inventor
Peter Stock
René PENTKE
Christoph Hoffmann
Eduard Lippert
Original Assignee
Volkswagen Aktiengesellschaft
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 Volkswagen Aktiengesellschaft filed Critical Volkswagen Aktiengesellschaft
Priority to JP2001560003A priority Critical patent/JP2003522902A/en
Priority to AU2001230212A priority patent/AU2001230212A1/en
Priority to EP01902360A priority patent/EP1259721A1/en
Publication of WO2001061178A1 publication Critical patent/WO2001061178A1/en

Links

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
    • F02F1/26—Cylinder heads having cooling means
    • F02F1/36—Cylinder heads having cooling means for liquid cooling
    • F02F1/38—Cylinder heads having cooling means for liquid cooling the cylinder heads being of overhead valve type
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/12—Other methods of operation
    • F02B2075/125—Direct injection in the combustion chamber for spark ignition engines, i.e. not in pre-combustion chamber
    • 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

  • the invention relates to a method for producing a cylinder head for an internal combustion engine, in particular for a gasoline engine with direct injection, in particular a motor vehicle, according to the preamble of claim 1.
  • the present invention is therefore based on the object of providing a method of the type mentioned above, wherein the disadvantages mentioned above are overcome and the smallest possible tolerance for displacement, combustion chamber depth or compression ratio is achieved.
  • the cylinder head is produced with an oversize on the crankcase side, that the volume of all the combustion chambers of the cylinder head assigned to the respective cylinders and from this an average value V, s ⁇ is determined, so that this volume V, s ⁇ with a desired volume for the Combustion chamber V S0LL is compared and, depending on this comparison, material is removed more or less mechanically at the cylinder head on the crankcase side in such a way that the sum of all cylinders results in a combustion chamber volume which comes as close as possible to a desired combustion chamber volume.
  • This has the advantage that a small scatter with regard to the compression ratio or the displacement is achieved.
  • a deviation of a combustion chamber depth from the target value can be achieved in a range of only ⁇ 0.05 mm
  • the volumes of the combustion chambers of the cylinder head assigned to individual cylinders are expediently determined using an optical method.This is preferably carried out in a production line of the cylinder head, with a dimension of each cylinder head which is to be mechanically removed from the crankcase side being transmitted to a corresponding downstream processing station
  • the cylinder head is produced with an oversize of 0.5 mm on the crankcase side before measuring the combustion chamber volumes .
  • a desired combustion chamber volume is expediently selected as the volume V S0LL , taking into account the oversize of the cylinder head on the crankcase side. Only the oversize is then mechanically removed if the deviation of the volume V, s ⁇ from the volume V S0LL is less than a predetermined value. If V, s ⁇ is significantly larger or smaller than V S0LL , more or less than the excess is mechanically removed on the combustion chamber side of the cylinder head
  • the cylinder head 10 shown in the single figure comprises individual intake ducts 12, individual exhaust ducts 14 and a combustion chamber side 16 on the crankcase side Cylinder head height 20 determines a combustion chamber depth 22
  • each combustion chamber is now 18 V ,, V 2 , V n, for example using an optical method, such as a digital fringe projection based on micromirror, determined
  • an average value V, s ⁇ is determined for the volume values V 1 f V 2 , V n of the combustion chambers 18 of the cylinder head educated.
  • This average value V, s ⁇ is compared with a desired value for the total volume of all combustion chambers V S0LL which takes into account the b r e r ⁇ nraum worne excess.
  • V, s ⁇ and V S0LL match exactly or if the deviation lies within a predetermined range, then the excess is precisely milled away on the combustion chamber side 16 of the cylinder head 10.
  • the determined volume V, s ⁇ does not match the target value V SO L , depending on the position, more or less than the excess is milled away such that after milling, the mean value of the volume of the combustion chambers is a target value for the volume of the combustion chambers without excess corresponds as closely as possible.
  • the dimension "cylinder head height" 20 is deliberately machined to maintain a predetermined combustion chamber volume within narrow limits, deviating from a standard dimension.

Abstract

The invention relates to a method for producing a cylinder head for an internal combustion engine, in particular for a spark ignition engine with direct injection, in particular of a motor vehicle. According to said method, the cylinder head is produced with excess dimensions on the side or the crank housing, the volume of all the combustion chambers allocated to the respective cylinders of the cylinder head is determined and a mean value VIST is determined from said volume. The volume VIST thus determined is compared with a desired volume for the combustion chamber VSOLL and using this comparison more or less material is mechanically removed on the crank housing side of the cylinder head, in such a way that a combustion chamber volume which corresponds as closely as possible to a desired combustion chamber volume is obtained from the sum for all the cylinders.

Description

Verfahren zur Herstellung eines Zylinderkopfes für eine Brennkraftmaschine Method of manufacturing a cylinder head for an internal combustion engine
Die Erfindung betrifft ein Verfahren zur Herstellung eines Zylinderkopfes für eine Brennkraftmaschine, insbesondere für einen Ottomotor mit Direkteinspritzung, insbesondere eines Kraftfahrzeuges, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a method for producing a cylinder head for an internal combustion engine, in particular for a gasoline engine with direct injection, in particular a motor vehicle, according to the preamble of claim 1.
Bei der Herstellung von Hubkolbenbrennkraftmaschinen ergeben sich aufgrund von Toleranzen im Gießverfahren Abweichungen im Volumen der jeweiligen Zylindern zugeordneten Brennräume des Zylinderkopfes. Dies führt zu entsprechenden Abweichung im gewünschten Volumen bzw. Hubvolumen und des Verdichtungsverhältnisses ε. Beispielsweise bei ε = 11 sind Toleranzen von 0,5 üblich. Bzgl. einer Brennraumtiefe sind hierbei Toleranzen im Bereich von ±0,2 mm hinzunehmen. Dies beeinflußt jedoch die Motorfunktion ungünstig. So steigt ggf. eine Abgastemperatur, eine Emission von Schadstoffen und ein Kraftstoffverbrauch.In the manufacture of reciprocating piston internal combustion engines, there are deviations in the volume of the combustion chambers of the cylinder head assigned to the respective cylinders due to tolerances in the casting process. This leads to a corresponding deviation in the desired volume or stroke volume and the compression ratio ε. For example, with ε = 11, tolerances of 0.5 are common. Concerning. tolerances in the range of ± 0.2 mm must be accepted. However, this adversely affects the engine function. For example, an exhaust gas temperature, an emission of pollutants and fuel consumption may increase.
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren der obengenannten Art zur Verfügung zu stellen, wobei die obengenannten Nachteile überwunden werden und eine möglichst geringe Toleranz für Hubraum, Brennraumtiefe bzw. Verdichtungsverhältnis erzielt wird.The present invention is therefore based on the object of providing a method of the type mentioned above, wherein the disadvantages mentioned above are overcome and the smallest possible tolerance for displacement, combustion chamber depth or compression ratio is achieved.
Diese Aufgabe wird erfindungsgemäß durch ein Verfahren der o.g. Art mit den in Anspruch 1 gekennzeichneten Merkmalen gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den abhängigen Ansprüchen angegeben.This object is achieved by a method of the above. Kind with the features characterized in claim 1 solved. Advantageous embodiments of the invention are specified in the dependent claims.
Dazu ist es erfindungsgemäß vorgesehen, daß der Zylinderkopf kurbelgehauseseitig mit einem Übermaß hergestellt wird, daß das Volumen aller jeweiligen Zylindern zugeordneter Brennräume des Zylinderkopfes und daraus ein Mittelwert V,sτ bestimmt wird, daß dieses so bestimmte Volumen V,sτ mit einem gewünschten Volumen für den Brennraum VS0LL verglichen wird und in Abhängigkeit von diesem Vergleich am Zylinderkopf kurbelgehauseseitig Material mechanisch mehr oder weniger derart abgetragen wird, daß sich in der Summe für alle Zylinder ein Brennraumvolumen ergibt, welches einem gewünschten Brennraumvolumen möglichst nahe kommt. Dies hat den Vorteil, daß eine geringe Streuung bzgl des Verdichtungsverhältnisses bzw des Hubraumes erzielt wird In überraschender Weise laßt sich eine Abweichung einer Brennraumtiefe vom Sollwert in einem Bereich von lediglich ±0,05 mm erreichenFor this purpose, it is provided according to the invention that the cylinder head is produced with an oversize on the crankcase side, that the volume of all the combustion chambers of the cylinder head assigned to the respective cylinders and from this an average value V, sτ is determined, so that this volume V, sτ with a desired volume for the Combustion chamber V S0LL is compared and, depending on this comparison, material is removed more or less mechanically at the cylinder head on the crankcase side in such a way that the sum of all cylinders results in a combustion chamber volume which comes as close as possible to a desired combustion chamber volume. This has the advantage that a small scatter with regard to the compression ratio or the displacement is achieved. Surprisingly, a deviation of a combustion chamber depth from the target value can be achieved in a range of only ± 0.05 mm
Zweckmaßigerweise werden die Volumen der einzelnen Zylindern zugeordneten Brennraume des Zylinderkopfes mit einem optischen Verfahren bestimmt Dies erfolgt bevorzugt in einer Produktionslinie des Zylinderkopfes, wobei ein kurbelgehauseseitig mechanisch abzutragendes Maß eines jeden Zylinderkopfes an eine entsprechend nachgeordnete Bearbeitungsstation übertragen wirdThe volumes of the combustion chambers of the cylinder head assigned to individual cylinders are expediently determined using an optical method.This is preferably carried out in a production line of the cylinder head, with a dimension of each cylinder head which is to be mechanically removed from the crankcase side being transmitted to a corresponding downstream processing station
In einer bevorzugten Ausfuhrung des Verfahrens wird der Zylinderkopf vor Messung der Brennraumvolumina kurbelgehauseseitig mit einem Übermaß von 0,5 mm hergestellt Zweckmaßigerweise wird als Volumen VS0LL ein gewünschtes Brennraumvolumen unter Berücksichtigung des kurbelgehauseseitigen Übermaßes des Zylinderkopfes gewählt Es wird dann lediglich das Übermaß mechanisch abgetragen, wenn die Abweichung des Volumens V,sτ vom Volumen VS0LL kleiner als ein vorbestimmter Wert ist Sofern V,sτ wesentlich großer bzw kleiner als VS0LL ist, wird an der Brennraumseite des Zylinderkopfes mehr bzw weniger als das Übermaß mechanisch abgetragenIn a preferred embodiment of the method, the cylinder head is produced with an oversize of 0.5 mm on the crankcase side before measuring the combustion chamber volumes . A desired combustion chamber volume is expediently selected as the volume V S0LL , taking into account the oversize of the cylinder head on the crankcase side. Only the oversize is then mechanically removed if the deviation of the volume V, sτ from the volume V S0LL is less than a predetermined value. If V, sτ is significantly larger or smaller than V S0LL , more or less than the excess is mechanically removed on the combustion chamber side of the cylinder head
Weitere Merkmale, Vorteile und vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den abhangigen Ansprüchen, sowie aus der nachstehenden Beschreibung der Erfindung anhand der beigefugten Zeichnung Diese zeigt in der einzigen Fig einen Zylinderkopf für eine Hubkolbenbrennkraftmaschine in schematischer SchnittansichtFurther features, advantages and advantageous embodiments of the invention result from the dependent claims, as well as from the following description of the invention with reference to the accompanying drawing
Der in der einzigen Fig dargestellte Zylinderkopf 10 umfaßt zy ndeπndividuelle Ansaugkanale 12, zylindeπndividuelle Auslaßkanale 14 und eine kurbelgehauseseitige Brennraumseite 16 Die Brennraumseite 16 bildet jeweils einem Zylinder eines nicht dargestellten Kurbeigehauses zugeordnete Brennraume 18 aus, von denen im Schnitt der einzigen Fig nur einer sichtbar ist Eine Zylinderkopfhohe 20 bestimmt dabei eine Brennraumtiefe 22The cylinder head 10 shown in the single figure comprises individual intake ducts 12, individual exhaust ducts 14 and a combustion chamber side 16 on the crankcase side Cylinder head height 20 determines a combustion chamber depth 22
Bei der Herstellung des Zylinderkopfes 10 wird dieser nach dem Gießvorgang nachbearbeitet und behalt an der Brennraumseite 16 ein Übermaß von beispielsweise 0,5 mm Nun wird das Volumen eines jeden Brennraumes 18 V,, V2, Vn beispielsweise mit einem optischen Verfahren, wie beispielsweise einer digitalen Streifenprojektion auf Mikrospiegelbasis, bestimmt Nach einem festgelegten Verfahren wird für die Volumenwerte V1 f V2, Vn der Brennraume 18 des Zylinderkopfes ein Mittelwert V,sτ gebildet. Dieser Mittelwert V,sτ wird mit einem Sollwert für das Gesamtvolumen aller Brennräume VS0LL, welches das brerιnraumseitige Übermaß berücksichtigt, verglichen. Stimmen V,sτ und VS0LL exakt überein oder liegt die Abweichung innerhalb eines vorbestimmten Bereiches, so wird an der Brennraumseite 16 des Zylinderkopfes 10 exakt das Übermaß weggefräst. Stimmt jedoch das ermittelte Volumen V,sτ nicht mit dem Sollwert VSO L überein, so wird je nach Lage mehr oder weniger als das Übermaß derart weggefräst, daß nach dem Fräsen der Mittelwert des Volumens der Brennräume einem Sollwert für das Volumen der Brennräume ohne Übermaß möglichst genau entspricht. Erfindungsgemäß wird somit das Maß "Zylinderkopfhohe" 20 zur Einhaltung eines vorgegebenen Brennraumvolumens innerhalb enger Grenzen gewollt abweichend von einem Normmaß bearbeitet. In the manufacture of the cylinder head 10, it is reworked after the casting process and maintains an excess of, for example, 0.5 mm on the combustion chamber side 16. The volume of each combustion chamber is now 18 V ,, V 2 , V n, for example using an optical method, such as a digital fringe projection based on micromirror, determined According to a defined method, an average value V, sτ is determined for the volume values V 1 f V 2 , V n of the combustion chambers 18 of the cylinder head educated. This average value V, sτ is compared with a desired value for the total volume of all combustion chambers V S0LL which takes into account the b r e r ιnraumseitige excess. If V, sτ and V S0LL match exactly or if the deviation lies within a predetermined range, then the excess is precisely milled away on the combustion chamber side 16 of the cylinder head 10. However, if the determined volume V, sτ does not match the target value V SO L , depending on the position, more or less than the excess is milled away such that after milling, the mean value of the volume of the combustion chambers is a target value for the volume of the combustion chambers without excess corresponds as closely as possible. According to the invention, the dimension "cylinder head height" 20 is deliberately machined to maintain a predetermined combustion chamber volume within narrow limits, deviating from a standard dimension.

Claims

PATENTANSPRÜCHE
Verfahren zur Herstellung eines Zylinderkopfes für eine Brennkraftmaschine, insbesondere für einen Ottomotor mit Direkteinspritzung, insbesondere eines Kraftfahrzeuges, dadurch gekennzeichnet, daß der Zylinderkopf kurbelgehauseseitig mit einem Übermaß hergestellt wird, daß das Volumen aller jeweiligen Zylindern zugeordneter Brennraume des Zylinderkopfes und daraus ein Mittelwert V,sτ bestimmt wird, daß dieses so bestimmte Volumen V|ST mit einem gewünschten Volumen für den Brennraum VS0LL verglichen wird und in Abhängigkeit von diesem Vergleich am Zylinderkopf kurbelgehauseseitig Material mechanisch mehr oder weniger derart abgetragen wird, daß sich in der Summe für alle Zylinder ein Brennraumvolumen ergibt, welches einem gewünschten Brennraumvolumen möglichst nahe kommtA method for producing a cylinder head for an internal combustion engine, in particular for a gasoline engine with direct injection, in particular a motor vehicle, characterized in that the cylinder head is produced on the crankcase side with an oversize that the volume of all the respective cylinders associated combustion spaces of the cylinder head and an average value V, sτ therefrom it is determined that this determined volume V | ST is compared with a desired volume for the combustion chamber V S0LL and, depending on this comparison, material is removed mechanically more or less from the crankcase side in such a way that the total combustion chamber volume for all cylinders is as close as possible to a desired combustion chamber volume
Verfahren nach Anspruch 1 , dadurch gekennzeichnet, daß die Volumen der einzelnen Zylinder zugeordneten Brennraume des Zylinderkopfes mit einem optischen Verfahren bestimmt werdenMethod according to Claim 1, characterized in that the volumes of the combustion spaces of the cylinder head assigned to the individual cylinders are determined using an optical method
Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Volumen der einzelnen Zylindern zugeordneten Brennraume des Zylinderkopfes in einer Produktionslinie des Zylinderkopfes bestimmt werden und ein kurbelgehauseseitig mechanisch abzutragendes Maß eines jeden Zylinderkopfes an eine entsprechend nachgeordnete Bearbeitungsstation übertragen wirdMethod according to Claim 1 or 2, characterized in that the volumes of the combustion chambers of the cylinder head assigned to individual cylinders are determined in a production line of the cylinder head and a dimension of each cylinder head which is to be mechanically removed on the crankcase side is transmitted to a corresponding downstream processing station
Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Zylinderkopf vor Messung der Brennraumvolumina kurbelgehauseseitig mit einem Übermaß von 0,Method according to one of the preceding claims, characterized in that the cylinder head has an oversize of 0 on the crankcase side before measuring the combustion chamber volumes.
5 mm hergestellt ist5 mm is made
Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß als Volumen VS0LL ein gewünschtes Brennraumvolumen unter Berücksichtigung des kurbelgehauseseitigen Übermaßes des Zylinderkopfes gewählt wird Method according to one of the preceding claims, characterized in that a desired combustion chamber volume is selected as the volume V S0LL taking into account the excess of the cylinder head on the crankcase side
6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß lediglich das Übermaß mechanisch abgetragen wird, wenn die Abweichung des Volumens V,sτ vom Volumen VS0LL kleiner als ein vorbestimmter Wert ist.6. The method according to claim 5, characterized in that only the excess is removed mechanically when the deviation of the volume V, sτ from the volume V S0LL is less than a predetermined value.
7. Verfahren nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß an der Brennraumseite des Zylinderkopfes weniger als das Übermaß mechanisch abgetragen wird, wenn V,sτ < VS0LL ist.7. The method according to claim 5 or 6, characterized in that less than the excess is mechanically removed on the combustion chamber side of the cylinder head when V, sτ <V S0LL .
8. Verfahren nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, daß an der Brennraumseite des Zylinderkopfes mehr als das Übermaß mechanisch abgetragen wird, wenn V|ST > VS0LL ist. 8. The method according to any one of claims 5 to 7, characterized in that more than the excess is mechanically removed on the combustion chamber side of the cylinder head when V | ST > V S0LL .
PCT/EP2001/000925 2000-02-18 2001-01-29 Method for producing a cylinder head for an internal combustion engine WO2001061178A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2001560003A JP2003522902A (en) 2000-02-18 2001-01-29 Method for manufacturing a cylinder head for an internal combustion engine
AU2001230212A AU2001230212A1 (en) 2000-02-18 2001-01-29 Method for producing a cylinder head for an internal combustion engine
EP01902360A EP1259721A1 (en) 2000-02-18 2001-01-29 Method for producing a cylinder head for an internal combustion engine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10007360.3 2000-02-18
DE2000107360 DE10007360B4 (en) 2000-02-18 2000-02-18 Method for producing a cylinder head for an internal combustion engine

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WO2001061178A1 true WO2001061178A1 (en) 2001-08-23

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EP (1) EP1259721A1 (en)
JP (1) JP2003522902A (en)
AU (1) AU2001230212A1 (en)
DE (1) DE10007360B4 (en)
WO (1) WO2001061178A1 (en)

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DE102005037735B4 (en) * 2005-08-05 2010-07-01 Nemak Linz Gmbh Cylinder head casting blank, cast cylinder head for diesel internal combustion engines and method of making a cylinder head casting blank
JP6361538B2 (en) * 2015-03-18 2018-07-25 マツダ株式会社 Method for adjusting engine combustion chamber volume with thermal barrier film

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US4559684A (en) * 1981-02-27 1985-12-24 Pryor Timothy R Controlled machining of combustion chambers, gears and other surfaces
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EP0854406A1 (en) * 1997-01-21 1998-07-22 Ford Global Technologies, Inc. Method of predicting volume of finished combustion chambers from a raw cylinder head casting
EP0894956A2 (en) * 1997-08-01 1999-02-03 C.R.F. Società Consortile per Azioni Spark-ignition internal combustion engine having a combustion chamber provided with three valves and a central spark-plug

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4559684A (en) * 1981-02-27 1985-12-24 Pryor Timothy R Controlled machining of combustion chambers, gears and other surfaces
DE3143516A1 (en) * 1981-11-03 1983-05-11 Audi Nsu Auto Union Ag, 7107 Neckarsulm Method of checking and setting a defined distance between the end outer surface of a piston in a reciprocating-piston machine and an opposite wall
DE4040938A1 (en) * 1990-12-20 1992-06-25 Kloeckner Humboldt Deutz Ag Machining the connecting surface between cylinder head and block - by using two stages with intermediate heat treatment to prestress surface and thereby avoid distortion during actual working of engine
DE4436031A1 (en) * 1994-10-08 1996-04-11 Ford Werke Ag Minimising shape and tolerance zone position deviations during machining of combustion chamber of cylinder head for IC engine
EP0854406A1 (en) * 1997-01-21 1998-07-22 Ford Global Technologies, Inc. Method of predicting volume of finished combustion chambers from a raw cylinder head casting
EP0894956A2 (en) * 1997-08-01 1999-02-03 C.R.F. Società Consortile per Azioni Spark-ignition internal combustion engine having a combustion chamber provided with three valves and a central spark-plug

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JP2003522902A (en) 2003-07-29
AU2001230212A1 (en) 2001-08-27
DE10007360B4 (en) 2008-07-31
EP1259721A1 (en) 2002-11-27
DE10007360A1 (en) 2001-08-23

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