EP0958076B1 - Kern und verfahren zum formen eines brennkraftmaschinenzylinderkopfes - Google Patents

Kern und verfahren zum formen eines brennkraftmaschinenzylinderkopfes Download PDF

Info

Publication number
EP0958076B1
EP0958076B1 EP97932896A EP97932896A EP0958076B1 EP 0958076 B1 EP0958076 B1 EP 0958076B1 EP 97932896 A EP97932896 A EP 97932896A EP 97932896 A EP97932896 A EP 97932896A EP 0958076 B1 EP0958076 B1 EP 0958076B1
Authority
EP
European Patent Office
Prior art keywords
cylinder head
core
mould core
combustion engine
moulding
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
EP97932896A
Other languages
English (en)
French (fr)
Other versions
EP0958076A1 (de
Inventor
FrançoisLe Mehnhir BAUDLOT
Patrick Gallard
André LE NEZET
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.)
Renault SAS
Original Assignee
Renault SAS
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 Renault SAS filed Critical Renault SAS
Publication of EP0958076A1 publication Critical patent/EP0958076A1/de
Application granted granted Critical
Publication of EP0958076B1 publication Critical patent/EP0958076B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B22C9/103—Multipart cores
    • 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

Definitions

  • the present invention relates to a process for the production of foundry parts and aims more particularly a process for casting a cylinder head for internal combustion engine as well that a nucleus for the implementation of this process, to improve accuracy dimensions of all the bedrooms combustion, intake ducts, ducts exhaust.
  • a cylinder head of internal combustion engine is performed in a mold comprising at least one core for each combustion chamber, duct sub-assemblies intake and exhaust pipes.
  • the core defining the shapes of the combustion chambers often being produced by an integrated footprint the sole (metal bottom) of the mold.
  • Such devices have the disadvantage of being sensitive to deviations from positioning of the nuclei with respect to others, these positioning differences coming from either inaccuracies when installing cores in the mold, or movements of the nuclei during of the metal casting caused by the difference density between the cores and the cast metal.
  • This disturbance caused by the spoiler is less important than the one previously created by the offset of the end of the duct with the valve seat but is nevertheless penalizing in the case of weak pipes and valves diameter.
  • the object of the present invention is therefore to propose a method for casting a cylinder head as well that a nucleus allowing to directly obtain a good location of the valve seats by relative to intake and exhaust ducts so as to eliminate the calibration machining and get better gas flow.
  • the method according to the invention relates to molding of a combustion engine cylinder head internal, of the type by which an alloy is poured metal in a mold containing non-nucleus fuses corresponding in particular to the parts hollowed out from the cylinder head such as the chambers of combustion, intake ducts, ducts exhaust and water or oil chambers.
  • the process is characterized in that it comprises a step of placing in the mold of a monobloc core integrating the shapes defining both the chambers of combustion and the intake ducts, and supporting rings making up the valve seats.
  • the monobloc core also incorporates the shapes defining the exhaust pipes.
  • the cylinder head valve seats are made by added and inserted rings during casting, said rings being supported by the monobloc core.
  • the monobloc core also incorporates the adapted forms defining the gross repository used for machining starts.
  • the invention also relates to a core intended for be used for the implementation of the process defined above and characterized in that it is monobloc type and integrates the forms defining both the combustion chambers and the ducts of admission, and in that it supports rings serving valve seats.
  • the monobloc core integrates also the shapes defining the conduits exhaust and supports the rings serving as valve seat.
  • the monobloc core also incorporates the adapted forms defining the gross repository used for machining starts.
  • said one-piece core is made in a core box and is made of sand compressed and agglomerated with a binder such as resin.
  • Figure 1 shows an embodiment particular of a core 1 for the realization by molding of a combustion engine cylinder head internal according to the invention.
  • the monobloc core 1 of FIGS. 1 to 3 has four identical parts 4 regularly spaced, arranged in the same alignment, and defining the four combustion chambers of the cylinder head to be molded.
  • Each combustion chamber 4 of the monobloc core 1 is connected in its part greater than two arms 2 and an arm 3 defining the two intake ducts and the two Siamese cylinder head exhaust pipes to mold.
  • rings 7, not shown on the Figures 1 and 2 are arranged around the conduits intake 2 and exhaust 3, against combustion chambers 4 of the monobloc core 1. These rings 7 are made of material suitable for the valve seat and allow inserting valve seats when pouring of the cylinder head molding.
  • the core monoblock 1 comprises a part 5 arranged under the combustion chambers 4. This part 5 extends mainly towards the rooms of combustion 4 neighbors to form a base 5 supporting the combustion chambers 4 to one adapted distance.
  • the base 5 also extends transversely to form arms 6 whose ends 8 define the raw repository used for machining starts.
  • the thickness of the base 5 is chosen according to the rigidity and holding the desired monobloc core 1.
  • the core 1 as shown in the Figures 1 to 3 can be carried out in a known manner in a core box with compressed sand and agglomerated with a binder.
  • Figures 4 to 6 show a mode particular realization of a device molding using the monobloc core 1 for setting in the process of molding a cylinder head according to the invention.
  • Figure 4 presents more particularly a mold seen from above when only the core monobloc 1 is put in place.
  • This mold has four movable lateral mold elements 11, 12, 16 and 17 can be moved apart to facilitate the demolding of the cylinder head and a mold element lower or sole 10 having a surface plane 15 producing the underside of the cylinder head to mold.
  • Figure 5 shows a section of the mold of figure 4 when the different nuclei classics needed to mold the chamber water from the cylinder head are in place.
  • the mold comprises a movable upper mold element 13, not shown in Figure 4, closing the mold to define the thickness of the walls of the cylinder head to mold and the volume of the chamber oil. Filling holes, not shown in the figure, are arranged through the upper mold element to allow the casting operation.
  • the movable side mold element 11 has a cavity for maintaining position of the free end of the arms 2 realizing the intake ducts when the mold is closed.
  • the side mold element 12 mobile has a cavity allowing the holding the free end of the arms in position 3 making the exhaust pipes.
  • the sole 10 has a cavity 14 intended to receive the monobloc core 1 before closing the mold and the casting operation.
  • the shape and volume of the cavity 14 are adapted and adjusted to base 5 and arms 6 of the monobloc core 1 such that shown in Figures 1 to 3, so that the base 5 and the arms 6 are integrally disposed in the cavity 14 of the sole 10 when the one-piece core 1 is arranged in the mold.
  • the molding process thus carried out allows obtain a cylinder head with excellent location of the rings 7 forming the seats of valve in relation to the intake ducts 2 and exhaust 3. Indeed, the latter being molded directly by the monobloc core 1 and the rings 7, inserted during casting, being supported by this same monobloc core 1, the precision dimensional of the whole bedroom combustion, valve seats, ducts intake, exhaust pipes is independent of the location of the different nuclei present in the mold and depends only on the quality of construction of the monobloc core 1.
  • This molding process using the core monobloc 1 therefore eliminates machining usually required with the conventional cylinder head molding processes using several cores for the conduits and the chamber combustion.
  • the use of the monobloc core 1 allows also to make a connection between the conduits and the combustion chamber including aerodynamics is optimized so as to offer very little resistance to air flow.
  • Minimizing pressure losses obtained by this process is particularly important for improving the performance of engine.
  • the reduction in pressure losses at the connection between the intake duct and the combustion chamber helps to improve noticeably filling the engine and reducing the pollution resulting from combustion.
  • the monobloc core 1 defines also the raw repository used for machining starts which eliminates the location uncertainties related to use of different nuclei and get better location of all machining.

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)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Claims (8)

  1. Verfahren zur Herstellung eines Zylinderkopfes für einen Verbrennungsmotor mittels Gießens, bei dem eine Metalllegierung in eine Gießform (11, 12, 13, 16, 17) eingefüllt wird, in der nicht schmelzbare Kerne eingesetzt sind, die insbesondere den Hohlstellen des Zylinderkopfes wie den Verbrennungskammern (4), den Einlassleitungen (2), den Auslassleitungen (3) sowie den Wasserkammern oder Ölleitungen entsprechen, dadurch gekennzeichnet, dass es den Verfahrensschritt des Einsetzens in die Gießform eines einstückigen Kerns aufweist, auf dem die Formteile für die Verbrennungskammern (4) und die Einlassleitungen (2) ausgebildet sind und der Ringe (7) trägt zur Herstellung der Ventilsitze.
  2. Verfahren zur Herstellung eines Zylinderkopfes für einen Verbrennungsmotor mittels Gießens nach Anspruch 1, dadurch gekennzeichnet, dass der einstückige Kern (1) außerdem die Formteile für die Ausbildung der Auslassleitungen (3) aufweist.
  3. Verfahren zur Herstellung eines Zylinderkopfes für einen Verbrennungsmotor mittels Gießens nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, dass die Ringe (7) durch das Gießen eingesetzt werden.
  4. Verfahren zur Herstellung eines Zylinderkopfes für einen Verbrennungsmotor mittels Gießens nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der einstückige Kern (1) außerdem die Formteile aufweist, die zur Ausbildung von Bezugspunkten (8) für die Weiterverarbeitung verwendet werden.
  5. Kern (1) mit Formteilen für die Ausbildung besonderer Hohlstellen während des Gießens eines Zylinderkopfes für einen Verbrennungsmotor, dadurch gekennzeichnet, dass der Kern (1) einstückig ausgebildet ist und dass er Formteile aufweist sowohl zur Ausbildung der Verbrennungskammern (4) als auch der Einlassleitungen (2) und dass er Ringe (7) trägt, die als Ventilsitze dienen.
  6. Kern nach Anspruch 5, dadurch gekennzeichnet, dass der einstückige Kern (1) außerdem Formteile aufweist zur Ausbildung der Auslassleitungen (3).
  7. Kern nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass der einstückige Kern (1) außerdem Formteile (8) aufweist, die zur Ausbildung von Bezugspunkten geeignet sind, die der Weiterbearbeitung dienen.
  8. Kern nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass der einstückige Kern (7) in einem Kernkasten hergestellt wird und aus komprimiertem Sand besteht, der mit einem Bindemittel wie z.B. Harz versetzt ist.
EP97932896A 1996-07-19 1997-07-11 Kern und verfahren zum formen eines brennkraftmaschinenzylinderkopfes Expired - Lifetime EP0958076B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9609071A FR2751251B1 (fr) 1996-07-19 1996-07-19 Procede et noyau pour la realisation par moulage d'une culasse de moteur a combustion interne
FR9609071 1996-07-19
PCT/FR1997/001273 WO1998003290A1 (fr) 1996-07-19 1997-07-11 Procede et noyau pour la realisation par moulage d'une culasse de moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP0958076A1 EP0958076A1 (de) 1999-11-24
EP0958076B1 true EP0958076B1 (de) 2003-02-26

Family

ID=9494239

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97932896A Expired - Lifetime EP0958076B1 (de) 1996-07-19 1997-07-11 Kern und verfahren zum formen eines brennkraftmaschinenzylinderkopfes

Country Status (7)

Country Link
EP (1) EP0958076B1 (de)
JP (1) JP2000514898A (de)
BR (1) BR9710505A (de)
DE (1) DE69719375T2 (de)
ES (1) ES2192689T3 (de)
FR (1) FR2751251B1 (de)
WO (1) WO1998003290A1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2792858B1 (fr) * 1999-04-30 2001-05-25 Renault Procede, dispositif et noyau pour la realisation par moulage d'une culasse de moteur a combustion interne
FR2793174B1 (fr) * 1999-05-07 2001-06-29 Renault Procede et dispositif pour la realisation par moulage d'une culasse de moteur a combustion interne
FR2823141B1 (fr) * 2001-04-09 2003-06-27 Renault Sas Procede de moulage d'une culasse
FR2848245B1 (fr) 2002-12-10 2007-03-09 Renault Sa Siege de soupape pour culasse de moteur a combustion interne
DE10339653A1 (de) * 2003-08-28 2005-03-24 Deutz Ag Gießkernminimierter Zylinderkopf
US8997945B1 (en) 2003-09-24 2015-04-07 Kelsey-Hayes Company Brake caliper for disc brake assembly and method and apparatus for producing same
US7168529B2 (en) 2003-09-24 2007-01-30 Kelsey-Hayes Company Brake caliper for disc brake assembly and method and apparatus for producing same
KR101163692B1 (ko) 2006-11-14 2012-07-09 현대자동차주식회사 실린더 헤드용 연소실 인서트 금형
DE102012015328A1 (de) * 2012-08-01 2014-02-06 GM Global Technology Operations, LLC (n.d. Ges. d. Staates Delaware) Gießkern und Gießvorrichtung
DE102014204859A1 (de) * 2014-03-17 2015-09-17 Volkswagen Aktiengesellschaft Zylinderkopfbauteil und Verfahren zur Herstellung eines solchen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4077458A (en) * 1975-08-08 1978-03-07 Nissan Motor Company, Limited Core and method for casting cylinder head with exhaust port
US4969504A (en) * 1989-07-21 1990-11-13 Brunswick Corporation Evaporable foam pattern for use in casting an exhaust manifold
EP0486463B2 (de) * 1990-11-16 1998-08-05 AVL List GmbH Gussform für den Zylinderblock einer Brennkraftmaschine mit zwei in V-Form angeordneten Zylinderreihen
US5251683A (en) * 1991-03-11 1993-10-12 General Motors Corporation Method of making a cylinder head or other article with cast in-situ ceramic tubes
US5239956A (en) * 1991-06-07 1993-08-31 Detroit Diesel Corporation Internal combustion engine cylinder heads and similar articles of manufacture and methods of manufacturing same

Also Published As

Publication number Publication date
DE69719375D1 (de) 2003-04-03
BR9710505A (pt) 1999-08-17
WO1998003290A1 (fr) 1998-01-29
EP0958076A1 (de) 1999-11-24
DE69719375T2 (de) 2003-12-24
FR2751251A1 (fr) 1998-01-23
JP2000514898A (ja) 2000-11-07
FR2751251B1 (fr) 1998-08-21
ES2192689T3 (es) 2003-10-16

Similar Documents

Publication Publication Date Title
EP0958076B1 (de) Kern und verfahren zum formen eines brennkraftmaschinenzylinderkopfes
MXPA05002557A (es) Procedimiento de fundicion, particularmente para cabeza de cilindros de un motor.
WO2002007914A1 (fr) Equipement de moulage de pieces de fonderies avec des moyens perfectionnes de positionnement de noyaux de sable, et procede de positionnement associe
EP1515812B1 (de) Verfahren und form zur herstellung von guss-stuecken, insbesondere von leichtmetall-motorbloecken
EP0404641B1 (de) Verteiler zum Stranggiessen von Stahl
FR2565858A1 (fr) Moule monobloc autoporteur en sable, comportant des alveoles de degazage
US6516869B2 (en) Mould structure for producing light metal alloy casts and a low pressure precision casting method in a semi permanent mould
FR2900969A3 (fr) Conduit d'admission a aerodynamique variable
FR2793174A1 (fr) Procede et dispositif pour la realisation par moulage d'une culasse de moteur a combustion interne
FR2888288A3 (fr) Cloison de separation pour conduit d'admission de culasse realisee venue de matiere par moulage avec la culasse
EP0307286B1 (de) Verfahren zum Giessen eines Zylinderblockes oder des entsprechenden Giessmodells
FR2792858A1 (fr) Procede, dispositif et noyau pour la realisation par moulage d'une culasse de moteur a combustion interne
EP2158986A1 (de) Präzisionsgussverfahren und verlorenes Modell für dieses Verfahren
CA2754687C (fr) Carter moule avec tuyauteries rapportees
EP1647417A1 (de) Rad und Giessverfahren für dieses Rad mit versetztem und maskiertem Ventil
WO2010130911A1 (fr) Procede de fabrication par coulee d'une culasse de moteur thermique
WO2006056708A2 (fr) Procédé de réalisation d'une rampe a huile dans un carter cylindres d'un moteur a combustion interne pour véhicule automobile noyau de moulage pour la mise en oeuvre d'un tel procédé
FR2769527A1 (fr) Procede et noyau pour la realisation par moulage d'une culasse de moteur a combustion interne
EP1135587B1 (de) Zylinderkopf für eine flüssigkeitsgekühlte brennkraftmaschine
FR2905615A1 (fr) Procede de realisation d'au moins une partie du circuit d'huile d'un bloc-moteur de moteur a combustion interne et bloc-moteur obtenu par un tel procede
FR2483275A1 (fr) Procede pour la fabrication en serie, par coulee unique, d'elements de machines pourvus de cages de protection solidaires de ces elements
FR2662471A1 (fr) Procede de realisation de puits de bougie dans une culasse d'un moteur a combustion interne et ensemble d'elements destine a former au moins un tel puits de bougie.
FR3065661B1 (fr) Noyau pour la fabrication par moulage a la cire perdue d'une aube de turbomachine
EP2002098A1 (de) Einen wasserkern mit einem entgasungsteil umfassender zylinderkopf und verfahren zur herstellung solch eines zylinderkopfs
EP3969202A1 (de) Form zur herstellung einer komponente durch giessen von metall und epitaktisches wachstum sowie zugehöriges herstellungsverfahren

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19990113

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES GB IT

17Q First examination report despatched

Effective date: 20000810

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: RENAULT S.A.S.

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE ES GB IT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 20030226

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 69719375

Country of ref document: DE

Date of ref document: 20030403

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20030415

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2192689

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20031127

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20140721

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20140721

Year of fee payment: 18

Ref country code: ES

Payment date: 20140728

Year of fee payment: 18

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69719375

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20150711

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150711

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160202

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20160826

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150712