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WO2000006880A1 - Culasse - Google Patents

Culasse Download PDF

Info

Publication number
WO2000006880A1
WO2000006880A1 PCT/EP1999/004828 EP9904828W WO0006880A1 WO 2000006880 A1 WO2000006880 A1 WO 2000006880A1 EP 9904828 W EP9904828 W EP 9904828W WO 0006880 A1 WO0006880 A1 WO 0006880A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder head
cylinder
screw
head according
side wall
Prior art date
Application number
PCT/EP1999/004828
Other languages
German (de)
English (en)
Inventor
Xaver Stemmer
Original Assignee
Audi Ag
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 Audi Ag filed Critical Audi Ag
Priority to EP99932857A priority Critical patent/EP1102927B1/fr
Priority to DE59901030T priority patent/DE59901030D1/de
Publication of WO2000006880A1 publication Critical patent/WO2000006880A1/fr

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
    • F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
    • F02F1/4214—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per 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
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/18—DOHC [Double overhead camshaft]
    • 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 cylinder head for a reciprocating piston internal combustion engine with at least two cylinders lying in series, according to the preamble of claim 1.
  • Such a cylinder head is shown, for example, in DE 23 42 530, which has two intake valves and two exhaust valves per cylinder, which are actuated via two overhead camshafts and bucket tappets.
  • the spark plug per cylinder is arranged in the cylinder center axis, with a central shaft being connected, in terms of casting technology, to the combustion chamber plate of the cylinder head on the one hand and to transverse walls forming camshaft bearings on the other.
  • Valve actuating means
  • the object of the invention is to make the generic cylinder head structurally more compact and stiffer with shorter inlet and / or outlet channels with a construction that is favorable in terms of production technology.
  • the cylinder head in the area of the combustion chamber plate with the retracted side walls and between inlet and / or outlet ducts shortened between the screw slugs of the combustion chamber becomes extremely compact with a correspondingly rigid support of the combustion chamber plate and the valve actuating means above it.
  • the shortening of the exhaust duct causes low exhaust gas temperature losses within the cylinder head and on the inlet side the favorable arrangement of injectors which can inject fuel into the intake valve opening cross section directly or without duct wall wetting.
  • the short duct lengths and mass concentrations thus result in rapid heating to the operating temperature of the internal combustion engine and low heat losses in the duct area.
  • connection surfaces resulting from the described construction can be produced without problems in terms of production technology by appropriate numerical control of an end mill, the router being immersed between the screw slugs in accordance with the course of the side walls and thus producing the flat connection surfaces with a corresponding flange contour.
  • FIG. 1 shows a horizontal longitudinal section through a cylinder head of a multi-cylinder four-valve reciprocating internal combustion engine according to line I-1 of FIG. 2;
  • FIG. 2 shows a cross section along the line II-II of FIG. 1 through the screw bosses between the two cylinders of the internal combustion engine for the cylinder head fastening screws; and Fig. 3 shows a further cross section along the line III-III of Figure 1 by the
  • cylinder head 10 for a four-cylinder reciprocating internal combustion engine with four gas exchange valves per cylinder, only the middle section is shown in FIG. 1, which covers approximately two cylinders of the cylinder crankcase, not shown. Unless described, the cylinder head is of a conventional type.
  • the cylinder head 10 produced in a casting process from a light metal alloy has a lower, flat connection surface 12 for mounting on the cylinder crankcase of the internal combustion engine and an approximately parallel connection surface 14 for a bearing cover (not shown) for the in transverse walls 16 of the cylinder head 10 in storage chairs 18, 20 mounted camshafts (not shown) of the internal combustion engine.
  • the transverse walls 16 are connected to one another via a longitudinal wall 15 which runs approximately centrally over the cylinders, the longitudinal wall 15 opening into the end walls of the cylinder head 10 in a manner not shown.
  • a spark plug shaft 24 is formed in each case in the longitudinal wall 15 approximately centrally above the cylinders or in their extended central axes 22, each of which opens into the combustion chamber 26 spanned by the combustion chamber plate 28 of the cylinder head 10 (cf. FIG. 3).
  • Two inlet ducts 30, 32 extend from the combustion chamber plate 28 and open into a flat connecting surface 34 for the flange connection of an intake manifold, not shown.
  • holes 38 are made for valve guides for the installation of the inlet valves (see longitudinal central axes 40 shown).
  • annular support surfaces 42 are provided at the ends of the bores 38.
  • outlet channels 44 extend from the combustion chamber plate 28 to a continuously flat connection surface 46, to which the flange of an exhaust manifold, not shown, can be connected.
  • the outlet channels 44 (only one outlet channel 44 can be seen) are in front of their opening into the connection surface 46 to a common outlet channel 48 merged.
  • bores 54 are made in the channel walls 52, which in turn are provided on support surfaces 56 for the helical ones
  • the bearing surfaces 42, 56 of the valve springs or the valve axes 40, 50 are arranged in a radial arrangement (all valve axes 40, 50 downward inclined toward the cylinder central axis 22) such that they are immediately adjacent to one of the screw bosses 64 and 64 for the purpose of introducing force to the adjacent side wall 68, 70.
  • a free space 58 for cooling liquid is provided above the combustion chamber plate 28 and is separated from the free space 60 above for lubricating oil by an approximately horizontally extending top wall 62.
  • screw bosses 64 are provided perpendicular to the connection surface, in whose bores 66 cylinder head fastening screws, not shown, can be used. As FIG. 2 shows, these screw bosses 64 extend to approximately half the height of the cylinder head 10; From there, the cylinder head side walls 68, 70, which partially protrude upward and laterally delimit the free space 60, are connected to the transverse walls 16 and the cylinder head end walls, which cannot be seen.
  • connection surfaces 34, 46 of the inlet channels 30, 32 or the outlet channels 48 which likewise end within the planes 72 or dip into the screw boss 64 with its edge contour (cf., for example, dashed lines 34, 46 of FIG. 2 ).
  • angles ⁇ between the side walls 68, 70 arranged in a V-shape relative to one another to the connection surfaces 34, 46 are in the Cross median plane seen per cylinder (strongest curvature of the
  • the undulating course of the side walls 68, 70 decreases when viewed upwards, or the radius of curvature r present in the lower region merges in the region of the connecting surface 14 with ⁇ or into a straight wall section.
  • the wavy flange contours (FIG. 1, lines 74) which result in the transition area between side walls 68, 70 and plan connection surfaces 34, 46 can additionally be milled in the direction of the double arrow 78 by milling the connection surfaces 34, 46 by correspondingly controlling the end mill (indicated by 76) for the usual longitudinal feed movement can be easily produced.
  • the cylinder head design described gives a construction which is particularly favorable in terms of construction and weight, with high rigidity of the combustion chamber plate and high longitudinal rigidity.
  • this construction results in particularly short inlet and outlet ducts, which on the inlet side result in an arrangement of the injection valves for fuel metering that is particularly close to the combustion chamber and short exhaust gas paths on the outlet side with the associated advantages.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne une culasse (10) pour moteur à combustion interne à piston, comprenant au moins deux cylindres en série et, pour chaque cylindre, au moins une chapelle d'admission et une chapelle d'échappement (44) s'étendant à partir d'une plaque à chambre d'explosion, et débouchant chacune dans une surface de jonction (34, 46) plane, située dans un plan uniforme, pour un collecteur d'échappement ou un collecteur d'admission, ainsi que des poches taraudées (64) disposées des deux côtés des chapelles, pour les boulons de fixation de la culasse, prévues sur les parois latérales de la culasse (10). En vue d'obtenir une construction compacte et d'un poids réduit, avec des chapelles d'admission et d'échappement de dimensions relativement réduites, l'invention est caractérisée en ce que les parois latérales (68, 70) de la culasse (10) sont réalisées chacune entre les poches taraudées (64) de la partie médiane du cylindre, en retrait vers l'intérieur, et sont directement adjacentes aux surfaces de jonction (34, 46) des chapelles d'admission et d'échappement.
PCT/EP1999/004828 1998-07-25 1999-07-09 Culasse WO2000006880A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP99932857A EP1102927B1 (fr) 1998-07-25 1999-07-09 Culasse
DE59901030T DE59901030D1 (de) 1998-07-25 1999-07-09 Zylinderkopf

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833531A DE19833531A1 (de) 1998-07-25 1998-07-25 Zylinderkopf
DE19833531.8 1998-07-25

Publications (1)

Publication Number Publication Date
WO2000006880A1 true WO2000006880A1 (fr) 2000-02-10

Family

ID=7875303

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/004828 WO2000006880A1 (fr) 1998-07-25 1999-07-09 Culasse

Country Status (4)

Country Link
EP (1) EP1102927B1 (fr)
DE (2) DE19833531A1 (fr)
ES (1) ES2172341T3 (fr)
WO (1) WO2000006880A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2342530A1 (de) * 1972-11-06 1974-05-16 Denzel Kraftfahrzeug Wolfgang Zylinderkopf fuer brennkraftmaschinen
FR2552820A1 (fr) * 1983-10-04 1985-04-05 Honda Motor Co Ltd Culasse de cylindre pour moteur a combustion interne du type a double arbre a cames en tete
DE4100459A1 (de) * 1990-02-13 1991-08-14 Avl Verbrennungskraft Messtech Zylinderkopf einer fluessigkeitsgekuehlten brennkraftmaschine mit in reihe angeordneten zylindern
DE3943729A1 (de) * 1989-12-11 1994-02-17 Porsche Ag Zylinderkopf einer Brennkraftmaschine
DE4315233A1 (de) * 1993-05-07 1994-07-28 Daimler Benz Ag Direkteinspritzende Brennkraftmaschine mit einem im Zylinderkopf zwischen Gaswechselventilen angeordneten Kraftstoffeinspritzventil
EP0735244A1 (fr) * 1995-03-27 1996-10-02 Mazda Motor Corporation Moteur diesel à injection directe

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3843983A1 (de) * 1988-12-27 1990-06-28 Kloeckner Humboldt Deutz Ag Viertakt-brennkraftmaschine
DE4338186A1 (de) * 1993-11-09 1995-05-11 Kloeckner Humboldt Deutz Ag Hubkolbenbrennkraftmaschine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2342530A1 (de) * 1972-11-06 1974-05-16 Denzel Kraftfahrzeug Wolfgang Zylinderkopf fuer brennkraftmaschinen
FR2552820A1 (fr) * 1983-10-04 1985-04-05 Honda Motor Co Ltd Culasse de cylindre pour moteur a combustion interne du type a double arbre a cames en tete
DE3943729A1 (de) * 1989-12-11 1994-02-17 Porsche Ag Zylinderkopf einer Brennkraftmaschine
DE4100459A1 (de) * 1990-02-13 1991-08-14 Avl Verbrennungskraft Messtech Zylinderkopf einer fluessigkeitsgekuehlten brennkraftmaschine mit in reihe angeordneten zylindern
DE4315233A1 (de) * 1993-05-07 1994-07-28 Daimler Benz Ag Direkteinspritzende Brennkraftmaschine mit einem im Zylinderkopf zwischen Gaswechselventilen angeordneten Kraftstoffeinspritzventil
EP0735244A1 (fr) * 1995-03-27 1996-10-02 Mazda Motor Corporation Moteur diesel à injection directe

Also Published As

Publication number Publication date
ES2172341T3 (es) 2002-09-16
EP1102927A1 (fr) 2001-05-30
EP1102927B1 (fr) 2002-03-20
DE59901030D1 (de) 2002-04-25
DE19833531A1 (de) 2000-01-27

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