EP0774575A1 - Culasse moulée d'un moteur à combustion interne multicylindre - Google Patents

Culasse moulée d'un moteur à combustion interne multicylindre Download PDF

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Publication number
EP0774575A1
EP0774575A1 EP96115800A EP96115800A EP0774575A1 EP 0774575 A1 EP0774575 A1 EP 0774575A1 EP 96115800 A EP96115800 A EP 96115800A EP 96115800 A EP96115800 A EP 96115800A EP 0774575 A1 EP0774575 A1 EP 0774575A1
Authority
EP
European Patent Office
Prior art keywords
cylinder head
cast
core
longitudinal
oil
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
EP96115800A
Other languages
German (de)
English (en)
Other versions
EP0774575B1 (fr
Inventor
Michael Dohn
Eduard Zaiss
Gerhard Eisberg
Erwin Escherle
Erhard Rau
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.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
Mercedes Benz 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
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Application filed by Daimler Benz AG, Mercedes Benz AG filed Critical Daimler Benz AG
Publication of EP0774575A1 publication Critical patent/EP0774575A1/fr
Application granted granted Critical
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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
    • F02F1/26—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
    • 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 cast cylinder head of a multi-cylinder internal combustion engine according to the preamble of claim 1.
  • a generic cylinder head of a multi-cylinder internal combustion engine is known.
  • the cylinder head comprises blind holes arranged in the cylinder head cover for receiving valve lash compensation elements, the blind holes being connected to a longitudinal oil channel for supplying pressurized oil to the valve lash compensation elements and to an oil collecting space through return openings.
  • the blind holes and the longitudinal oil channel must be created in a separate operation and make the production of the cylinder head more expensive.
  • the cylinder head according to the invention has blind holes arranged in the cylinder head cover for receiving valve lash compensation elements.
  • the blind holes are above distributor channels with a longitudinal oil channel extending in the longitudinal direction of the cylinder head for supplying pressurized oil to the valve clearance compensating elements in connection.
  • Each blind hole is connected to an oil collection chamber via a return opening at its lower end.
  • the blind holes, the longitudinal oil channel, the distribution channels, the return openings and the oil collecting space are cast in by a casting core. This is achieved through a multifunctional core, also known as an oil gallery core, which comprises several core sections.
  • a basic core is used to produce the return openings and the oil collecting space.
  • a first core section connected to the base core is used to produce the blind holes.
  • a second core section connected to the first core section is used to produce the longitudinal oil channel and the distribution channels.
  • the multifunctional core is supported by two core bearings in the lower part of the mold.
  • a secondary air duct extends between gas exchange valves and chambers in the longitudinal direction of the cylinder head and has connecting pieces branching off to the individual outlet ducts.
  • the secondary air duct and the connecting pieces are produced by a third core section, which is connected to the other core sections of the multifunctional core via a core bearing.
  • a simplified manufacture of the cylinder head is achieved by the invention.
  • the multi-functional core is used for the simultaneous production of several elements of the cylinder head, so that both machining processes, such as drilling the longitudinal oil channel, and the insertion of individual cores can be omitted.
  • the core section forming the secondary air channel is advantageously held on the core bearing facing away from the chain shaft, so that the secondary air channel is separated from the other core sections and thus has only one connection to the outlet channel.
  • the core section can also be connected to the core bearing in the chain case, so that the core is more stable. Then the secondary air duct on this side must be closed later.
  • the secondary air duct runs arbitrarily, but advantageously meanderingly, between the gas exchange ducts and the chambers, so that the cooling water chamber of the cylinder head is largely preserved.
  • the cylinder head 1 comprises a one-piece casting with a cylinder head base 2 and the longitudinal outer walls 4, 5 and front outer walls 6, 7 leading away from the latter up to a cover separating plane 3.
  • a cylinder head cover 8 is cast into the cylinder head 1 at a distance from the cylinder head base 2, through which a cooling water chamber 9 is separated from an overlying control chamber 10.
  • an oil collecting space 11 is arranged, over which in turn a longitudinal oil channel 12 runs.
  • the cylinder head base 2 has a combustion chamber 13 for each cylinder, from each of which an inlet channel (not shown here), an outlet channel 14 and chambers (also not shown here) for receiving a spark plug, an injection nozzle or the like emanate. Pass through the inlet and outlet channels 14 the cooling water chamber 9 up to the longitudinal outer walls 4,5.
  • each blind hole 16 is at its lower end via a return opening 19 with the oil collection chamber 11 in connection through which the oil from the cylinder head 1 via a chain shaft 20 and through special oil return holes, not shown here the oil pan of the internal combustion engine can flow back.
  • the blind holes 16, the longitudinal oil channel 12, the distributor channels 17, the return openings 19 and the oil collecting space 11 are formed by a single casting core, which is designed as a multifunctional core a.
  • the drilling of the longitudinal oil channel, the distribution channels and the return openings as well as the insertion of individual cores are thus no longer necessary. Only the pre-cast blind holes 16 for receiving valve clearance compensation elements are subsequently drilled.
  • the multifunctional core a also referred to as an oil gallery core, comprises several core sections b to d.
  • a base core b serves to produce the oil collecting space 11 and the return openings 19.
  • a first core section c connected to the base core b serves to produce the blind holes 16.
  • a second core section d connected to the first core section c serves to produce the tubular longitudinal oil channel 12 and the Core of the longitudinal oil channel 12 stabilizing distribution channels 17.
  • the multifunctional core a is supported by two core bearings a ', a''in the lower mold part.
  • a defined parting plane 22 between the basic core b and one necessary to form the control chamber 10 is formed
  • a secondary air duct 23 extends approximately in a meandering shape in the longitudinal direction 18 of the cylinder head between the gas exchange ducts 14 and the chambers, in such a way that the cooling water chamber 9 of the cylinder head 1 is largely preserved.
  • the secondary air duct 23 in each case has connecting pieces 24 branching off from the individual outlet ducts 14 and opening in the region 25 near the valve on the side of the outlet duct 14 facing the inlet duct.
  • the secondary air duct 23 and the connecting pieces 24 are produced by a further core section e, which is connected to the other core sections b to d of the multifunctional core a via a core bearing a '.
  • a further core section e which is connected to the other core sections b to d of the multifunctional core a via a core bearing a '.
  • the core section e protrudes in the region 25 near the valve into an outlet channel core (not shown here), which is recessed accordingly.
  • the casting skin formed during the casting between the outlet channel 14 and the connecting piece 24 thus lies within the outlet channel 14.
  • the area 25 of the outlet channel 14 is usually machined by form cutters, whereby the casting skin is advantageously removed at the same time.

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)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP96115800A 1995-11-15 1996-10-02 Culasse moulée d'un moteur à combustion interne multicylindre Expired - Lifetime EP0774575B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19542495A DE19542495C5 (de) 1995-11-15 1995-11-15 Gegossener Zylinderkopf einer mehrzylindrigen Brennkraftmaschine
DE19542495 1995-11-15

Publications (2)

Publication Number Publication Date
EP0774575A1 true EP0774575A1 (fr) 1997-05-21
EP0774575B1 EP0774575B1 (fr) 2001-05-16

Family

ID=7777472

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96115800A Expired - Lifetime EP0774575B1 (fr) 1995-11-15 1996-10-02 Culasse moulée d'un moteur à combustion interne multicylindre

Country Status (4)

Country Link
US (1) US5730095A (fr)
EP (1) EP0774575B1 (fr)
DE (2) DE19542495C5 (fr)
ES (1) ES2158206T3 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE10339653A1 (de) * 2003-08-28 2005-03-24 Deutz Ag Gießkernminimierter Zylinderkopf
JP2007309136A (ja) * 2006-05-16 2007-11-29 Toyota Motor Corp 内燃機関
JP4625425B2 (ja) * 2006-05-22 2011-02-02 本田技研工業株式会社 シリンダヘッドのオイル通路構造
DE102008059832B4 (de) * 2008-12-01 2012-05-24 Audi Ag Verfahren zum Gießen eines Zylinderkopfes
DE102016200237B4 (de) 2016-01-12 2022-01-20 Ford Global Technologies, Llc Direkteinspritzende aufgeladene Brennkraftmaschine mit Wassereinspritzung und Verfahren zum Betreiben einer derartigen Brennkraftmaschine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2659692A1 (fr) * 1990-03-14 1991-09-20 Peugeot Culasse moulee pour moteur a combustion interne.
DE4417480C1 (de) * 1994-05-19 1995-05-04 Audi Ag Zylinderkopf für eine Brennkraftmaschine

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JPH0392573A (ja) * 1989-09-05 1991-04-17 Nissan Motor Co Ltd 内燃機関のシリンダヘッド
JP2623856B2 (ja) * 1989-09-05 1997-06-25 日産自動車株式会社 内燃機関のシリンダヘッド
US5220853A (en) * 1990-05-24 1993-06-22 Matsushita Electric Industrial Co., Ltd. Cam shaft support apparatus for an engine
AT402321B (de) * 1991-02-12 1997-04-25 Avl Verbrennungskraft Messtech Zylinderkopf für brennkraftmaschinen
JP3150353B2 (ja) * 1991-03-18 2001-03-26 マツダ株式会社 エンジンの燃焼室構造
JP3089689B2 (ja) * 1991-03-20 2000-09-18 スズキ株式会社 シリンダヘッドのオイル通路構造
DE4117162A1 (de) * 1991-05-25 1992-11-26 Kloeckner Humboldt Deutz Ag Zylinderkopf fuer eine brennkraftmaschine
DE4344356C2 (de) * 1993-01-15 2003-10-09 Volkswagen Ag Zylinderkopf für eine Brennkraftmaschine mit Sekundärluftzufuhr
DE4417048C2 (de) * 1994-05-14 1996-03-28 Fraba Technology And Trading G Einrichtung zur Überwachung
DE19542495C5 (de) * 1995-11-15 2005-08-04 Daimlerchrysler Ag Gegossener Zylinderkopf einer mehrzylindrigen Brennkraftmaschine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2659692A1 (fr) * 1990-03-14 1991-09-20 Peugeot Culasse moulee pour moteur a combustion interne.
DE4417480C1 (de) * 1994-05-19 1995-05-04 Audi Ag Zylinderkopf für eine Brennkraftmaschine

Also Published As

Publication number Publication date
ES2158206T3 (es) 2001-09-01
US5730095A (en) 1998-03-24
DE59606903D1 (de) 2001-06-21
DE19542495C5 (de) 2005-08-04
EP0774575B1 (fr) 2001-05-16
DE19542495C1 (de) 1997-01-16

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