EP0515925B1 - Culasse pour moteur à combustion - Google Patents

Culasse pour moteur à combustion Download PDF

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Publication number
EP0515925B1
EP0515925B1 EP92108224A EP92108224A EP0515925B1 EP 0515925 B1 EP0515925 B1 EP 0515925B1 EP 92108224 A EP92108224 A EP 92108224A EP 92108224 A EP92108224 A EP 92108224A EP 0515925 B1 EP0515925 B1 EP 0515925B1
Authority
EP
European Patent Office
Prior art keywords
cylinder head
ducts
oil
cylinder
cores
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.)
Expired - Lifetime
Application number
EP92108224A
Other languages
German (de)
English (en)
Other versions
EP0515925A1 (fr
Inventor
Jürgen Dipl.-Ing. Wahnschaffe
Lothar Bauer
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz 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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of EP0515925A1 publication Critical patent/EP0515925A1/fr
Application granted granted Critical
Publication of EP0515925B1 publication Critical patent/EP0515925B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/0009—Cylinders, pistons
    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L2001/0476—Camshaft bearings
    • 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
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1816—Number of cylinders four
    • 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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • F02F2001/247—Arrangement of valve stems in cylinder heads the valve stems being orientated in parallel with the cylinder axis

Definitions

  • the invention relates to a cylinder head for an internal combustion engine according to the preamble of claim 1.
  • Such an internal combustion engine with the features of the preamble of the patent which is known from FR-A 2 552 820, enables a favorable arrangement of an ignition device or an injection device in the middle of the combustion chamber associated with each piston, by the gas exchange valves around the central ignition device or injection device can be arranged around in the cylinder head area assigned to a combustion chamber. Nevertheless, a reliable supply of lubricating oil and, if necessary, cooling oil to the camshaft bearings, the valves and the sliding surface between the camshaft and valve tappet must be ensured.
  • the known cylinder head has disadvantages, since long connections to the valves and the camshaft bearings are present from the oil channels arranged below the camshafts. These have to be elaborately manufactured after casting the cylinder head.
  • EP-A 0 416 600 is also known, which likewise shows a cylinder head with oil bores which extend along the cylinder head and which are connected to the camshaft bearings via branch bores.
  • the invention has for its object to provide a cylinder head for an internal combustion engine, in which a reliable supply of lubricating oil to the camshaft bearings and the valves is ensured, the corresponding oil passages and connections should be easy and inexpensive to manufacture.
  • This object is achieved in that the oil passages running parallel to the camshafts and arranged next to the valves within the drilling pattern formed by the cylinder head screws and the connections formed as passages or recesses from the oil passages to the valves and the camshaft bearings are formed by pouring cores when the cylinder head is cast become.
  • the short connections have a positive effect on the manufacturing process. Furthermore, due to the short connections, the risk of breaking appropriately designed casting cores is low or no longer exists.
  • the pouring cores of the oil channels and the channels and / or recesses branching off each oil channel are formed in one piece.
  • This one-piece design enables a particularly efficient manufacturing process, since only one casting core has to be fixed in the mold for each oil channel, preferably at the ends of the cylinder head.
  • the oil channels are advantageously connected to one another via transverse channels.
  • the casting cores of the two oil channels of the cylinder head and the transverse channels connecting them can be formed in one piece. This means that only one core needs to be defined for each cylinder head for the entire oil supply to the cylinder head in the casting mold. However, this also minimizes the risk of core parts breaking off, so that the reject rate of unusable cylinder heads is further reduced.
  • branch channels to the camshaft bearings are connected to the transverse channels.
  • This solution is particularly useful if cross-channels are provided in the area between all adjacent cylinders.
  • the cores to the camshaft bearings can be formed as simple short branch channels from these transverse channels.
  • the casting cores of the transverse channels are also preferably formed in one piece with the casting cores of the branch channels.
  • bearing cores are formed on the casting cores of the channels or recesses to the valve tappets, which are locked after the core assembly between the lower valve spring core part and the upper valve spring core part. This further stabilizes the entire core and further reduces the risk of damage to the core. This also eliminates the risk of the casting core "bending", particularly in the area of the oil channels.
  • the gas exchange valves are preferably arranged vertically, that is to say axially parallel in the cylinder head. This has the advantage of an uncomplicated casting core and simple workability, for example of the valve seats or valve seat rings.
  • the cylinder head according to FIG. 1 has four gas exchange valves per cylinder, which are arranged in recesses 1a, 1b, 1c, 1d for each cylinder.
  • the recesses 1a, 1b, 1c, 1d in FIG. 1 have a diameter which is designed to accommodate hydraulic tappets for valve clearance compensation.
  • the recesses 1a, 1b, 1c, 1d or the corresponding gas exchange valves and hydraulic tappets are arranged in relation to the combustion chamber of a cylinder such that an opening 2 can be arranged in the center of the combustion chamber.
  • An ignition device, a prechamber or an injection nozzle can be inserted into the opening 2.
  • the cylinder head is fastened to the crankcase of the internal combustion engine with cylinder head screws, the cylinder head screws being passed through cylinder head screw pipes 3.
  • Connecting walls 4 extend between the cylinder head screw pipes 3.
  • oil channels 6a, 6b extend parallel to the axes of the camshafts 5a, 5b (FIG. 3).
  • the oil passes through inlets and outlets 7a, 7b or alternatively 7c, in this case 7b is closed and transverse channels 8a, 8b into the oil channels 6a, 6b.
  • further transverse channels 8c, 8d, 8e are provided between the individual cylinder units In the four-cylinder head shown.
  • all channels through which oil flows are formed by a single casting core.
  • the casting core is held by receptacles which protrude through the inlet and outlet, 7a, 7b, and by bearing cores which protrude into the recesses 1a, 1b, 1c, 1d for the valves and are locked between the valve spring lower part and the valve spring upper part.
  • the oil channel 6b is shown in dashed lines in the section according to FIG.
  • FIG. 3 shows a section through an assembled cylinder head.
  • the cylinder head with the oil channels 6a, 6b is covered by a cylinder head cover 9.
  • Two camshafts 5a, 5b are mounted in the covered space, which actuate hydraulic tappets 11a, 11b with their cams 10a, 10b.
  • the hydraulic tappets 11a, 11b in turn act on valve stems 12a, 12b, which are connected to valve disks, not shown, for controlling the gas exchange of the internal combustion engine.
  • Channels 13a, 13b branch off from the oil channels 6a, 6b to the recesses 1a, 1b, 1c, 1d, in which the hydraulic tappets 11a, 11b and the valve stems 12a, 12b with the valve springs are arranged.
  • a cross-channel 8c with branch channels 14c ', 14c "to the camshaft bearings is shown in broken lines.
  • FIG. 4 shows a section III through an unmounted cylinder head in the area of cylinder head screw pipes 3 while FIG. 5 shows a section IV through the cylinder head in Area of the transverse channel 8d.
  • FIGS. 6 and 7 show sections through another embodiment of a cylinder head with oil channels 6a ', 6b'.
  • channels 13a, 13b branch off from the oil channels 6a ', 6b' to the recesses 1a, 1b, 1c, 1d of each cylinder.
  • the camshaft bearings are connected via recesses 15a, 15b connected to the oil channels 6a ', 6b'.
  • Cross channels are not provided in this embodiment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Claims (7)

  1. Culasse pour un moteur à combustion,interne qui présente un carter de vilebrequin monté de façon à pouvoir tourner dedans, sur lequel est fixé au moins une bielle reliée à un piston, le piston pouvant se déplacer dans un cylindre, qui est coiffé par la culasse usinée pour plusieurs cylindres, deux arbres à cames (5a, 5b) étant disposés dans la culasse, arbres qui commandent pour chaque cylindre les soupapes en particulier deux soupapes d'admission et deux soupapes d'échappement, des canaux d'huile (6a, 6b, 6a', 6b') étant disposés en dessous des arbres à cames (5a, 5b), parallèlement à ceux-ci, canaux qui s'étendent dans un espace intérieur de la culasse formé par les puits des goujons de culasse (3) et les parois (4) qui relient ceux-ci, culasse caractérisée en ce que les canaux d'huile (6a, 6b, 6a', 6b') et les canaux (13a, 13b) et/ou les évidements (15a, 15b) des canaux d'huile (6a, 6b, 6a', 6b') aux soupapes et aux paliers des arbres à cames sont réalisés lors de la coulée de la culasse au moyen du noyau de coulée.
  2. Culasse selon la revendication 1, caractérisée en ce que les noyaux de coulée des canaux d'huile (6a, 6b, 6a', 6b') et les canaux (13a, 13b) qui partent en dérivation de chaque canal d'huile (6a, 6b, 6a', 6b') et/ou des évidements (15a, 15b) sont constitués d'une seule pièce.
  3. Culasse selon l'une des revendications précédentes, caractérisée en ce que les canaux d'huile (6a, 6b, 6a', 6b') sont reliés les uns aux autres par des canaux transversaux (8a, 8b, 8c, 8d, 8e).
  4. Culasse selon la revendication 3, caractérisée en ce que les noyaux de coulée des canaux d'huile (6a, 6b, 6a', 6b') et les canaux transversaux (8a, 8b, 8c, 8d, 8e) sont constitués d'une seule pièce.
  5. Culasse selon la revendication 3, ou la revendication 4, caractérisée en ce qu'aux canaux transversaux (8a, 8b, 8c, 8d, 8e) sont raccordés des canaux de déviation (14c', 14c") allant aux paliers des arbres à cames.
  6. Culasse selon la revendication 5, caractérisée en ce que les noyaux de coulée des canaux transversaux (8a, 8b, 8c, 8d, 8e) et les canaux de déviation (14c, 14c") sont constitués d'une seule pièce.
  7. Culasse selon l'une des revendications 2 à 6, caractérisée en ce que sur les noyaux de coulée des canaux (13a, 13b) et/ou des évidements (15a, 15b) allant aux soupapes sont formés des noyaux de paliers, les noyaux de paliers après le montage des noyaux étant bloqués entre la partie inférieure des noyaux de ressort de soupape et la partie supérieure des noyaux de ressort de soupape.
EP92108224A 1991-05-25 1992-05-15 Culasse pour moteur à combustion Expired - Lifetime EP0515925B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4117162 1991-05-25
DE4117162A DE4117162A1 (de) 1991-05-25 1991-05-25 Zylinderkopf fuer eine brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP0515925A1 EP0515925A1 (fr) 1992-12-02
EP0515925B1 true EP0515925B1 (fr) 1996-01-31

Family

ID=6432450

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92108224A Expired - Lifetime EP0515925B1 (fr) 1991-05-25 1992-05-15 Culasse pour moteur à combustion

Country Status (3)

Country Link
EP (1) EP0515925B1 (fr)
JP (1) JPH05180067A (fr)
DE (2) DE4117162A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0890726A2 (fr) 1997-07-12 1999-01-13 DEUTZ Aktiengesellschaft Culasse à quatre soupapes agencées inclinées

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4435299A1 (de) * 1994-10-01 1996-04-04 Bayerische Motoren Werke Ag Reihen-Zylinderkopf mit gegossenem Öl-Längskanal
DE19542495C5 (de) * 1995-11-15 2005-08-04 Daimlerchrysler Ag Gegossener Zylinderkopf einer mehrzylindrigen Brennkraftmaschine
DE19723342C1 (de) 1997-06-04 1998-09-03 Vaw Mandl & Berger Gmbh Zylinderkopf und Gießkern zur Herstellung von Ölkanälen
US6123055A (en) * 1998-02-25 2000-09-26 Isuzu Motors Limited Cylinder head structure
JP2004116356A (ja) * 2002-09-25 2004-04-15 Isuzu Motors Ltd シリンダヘッドのオイルギャラリ形成方法及びシリンダヘッド
JP4075717B2 (ja) * 2003-07-25 2008-04-16 三菱自動車工業株式会社 内燃機関のシリンダヘッド構造
DE102005028807A1 (de) 2005-06-22 2007-01-04 GM Global Technology Operations, Inc., Detroit Verbrennunsmotor mit integrierter Ölpeilstabführung
DE102012222752A1 (de) 2012-12-11 2014-06-12 Mahle International Gmbh Lageranordnung

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
US3186387A (en) * 1963-10-09 1965-06-01 Gen Motors Corp Die castable cylinder head construction
JPS59203851A (ja) * 1983-05-02 1984-11-19 Honda Motor Co Ltd 内燃機関のシリンダヘツド
JPS6079141A (ja) * 1983-10-04 1985-05-04 Honda Motor Co Ltd Ｄｏｈｃ型４サイクル内燃機関のシリンダヘツド
JPH0754090B2 (ja) * 1984-09-14 1995-06-07 スズキ株式会社 自動二輪車用エンジンのシリンダヘッド冷却構造
JPS61261612A (ja) * 1985-05-14 1986-11-19 Honda Motor Co Ltd 内燃機関の油圧タペツト付動弁機構における給油装置
DE3604667A1 (de) * 1986-02-14 1987-08-20 Audi Ag Gegossener zylinderkopf fuer eine mehrzylindrige reihen-brennkraftmaschine
DE3710630A1 (de) * 1987-03-31 1988-07-07 Audi Ag Fluessigkeitsgekuehlter zylinderkopf
DE3724495A1 (de) * 1987-07-24 1989-02-02 Audi Ag Ventilgesteuerte, fremdgezuendete viertakt-hubkolbenbrennkraftmaschine
JPH088287Y2 (ja) * 1988-02-22 1996-03-06 日産自動車株式会社 Ｄｏｈｃ４バルブ型内燃機関のシリンダヘッド
DE3826013A1 (de) * 1988-07-30 1990-02-01 Bayerische Motoren Werke Ag Zylinderkopf fuer hubkolben-brennkraftmaschinen
JPH087043Y2 (ja) * 1988-10-29 1996-02-28 富士重工業株式会社 ダブルオーバヘッドカム型動弁機構の潤滑装置
JP2539260B2 (ja) * 1988-12-03 1996-10-02 マツダ株式会社 Ｄｏｈｃエンジンのカム軸スラスト規制構造
JPH0392573A (ja) * 1989-09-05 1991-04-17 Nissan Motor Co Ltd 内燃機関のシリンダヘッド

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0890726A2 (fr) 1997-07-12 1999-01-13 DEUTZ Aktiengesellschaft Culasse à quatre soupapes agencées inclinées

Also Published As

Publication number Publication date
JPH05180067A (ja) 1993-07-20
EP0515925A1 (fr) 1992-12-02
DE59205210D1 (de) 1996-03-14
DE4117162A1 (de) 1992-11-26

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