EP0890020B1 - Verfahren zur herstellung von zylinderköpfen für verbrennungsmotoren - Google Patents
Verfahren zur herstellung von zylinderköpfen für verbrennungsmotoren Download PDFInfo
- Publication number
- EP0890020B1 EP0890020B1 EP97916394A EP97916394A EP0890020B1 EP 0890020 B1 EP0890020 B1 EP 0890020B1 EP 97916394 A EP97916394 A EP 97916394A EP 97916394 A EP97916394 A EP 97916394A EP 0890020 B1 EP0890020 B1 EP 0890020B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve seat
- valve
- cylinder head
- casting
- process according
- 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
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 5
- 238000000034 method Methods 0.000 title claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 15
- 239000011148 porous material Substances 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 238000003825 pressing Methods 0.000 claims abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052802 copper Inorganic materials 0.000 claims abstract description 3
- 239000010949 copper Substances 0.000 claims abstract description 3
- 238000005245 sintering Methods 0.000 claims abstract 2
- 238000005266 casting Methods 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 230000005484 gravity Effects 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims 5
- 238000007711 solidification Methods 0.000 claims 1
- 230000008023 solidification Effects 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- 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
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
-
- 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
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/22—Valve-seats not provided for in preceding subgroups of this group; Fixing of valve-seats
Definitions
- the invention relates to a method for manufacturing of cylinder heads for internal combustion engines according to the Preamble of claim 1.
- valve seat rings or retracting hollow cylindrical valve guides requires a considerable manufacturing outlay, e.g. B. machining of valve seat ring, valve guide and cylinder head to the necessary installation tolerances to comply with, and also a correct position Positioning before installing the rings or Valve guides in the cylinder head.
- machining of valve seat ring, valve guide and cylinder head to the necessary installation tolerances to comply with, and also a correct position Positioning before installing the rings or Valve guides in the cylinder head.
- a Surface treatment e.g. B. by laser remelting or alloys, are significant amounts of energy needed this method with an efficiency of Lasers of 3% appear to be very uneconomical leaves.
- valve seat rings pour high density into cylinder heads, here arises between the cylinder head material and Valve seat ring no intimate connection (DE 39 37 402 A1). Essentially, the ring stops in the Cylinder head only by mechanical clamping, which means there is no intimate contact with the cylinder head and there is a risk that the rings fall out.
- This solution also has the disadvantage of one oxidized transition from valve seat ring to Cylinder head; the resulting layer works insulating and prevents high conductive Heat transfer.
- the invention aims to remedy these disadvantages.
- the object of the invention is accordingly a solution for the design of cylinder heads develop by directly pouring in Valve seat rings and valve guides of the manufacturing outlay can be reduced and where nevertheless an intimate connection of the Valve seat rings and the valve guides to the Cylinder head material and thus an increase in thermal conductivity can be achieved.
- this object is achieved in a method of manufacturing cylinder heads for Internal combustion engines according to the characteristics in the license plate of claim 1.
- Valve seat rings and valve guides with an open one Pore volumes of 5 to 15% are used.
- liquid aluminum penetrates into the pores of the tempered valve seat rings and valve guides and fill it out.
- Cylinder head material used aluminum so increased the thermal conductivity of the materials Proportion of infiltrated aluminum.
- an insulating intermediate layer in the area Cylinder head and valve seat ring or valve guide avoided, causing heat conduction from the aforementioned Component to the cooling circuit in the cylinder head is increased.
- the invention also offers the option of instead conventional seat ring and guide materials the basis of iron or copper ceramic materials use that specifically for infiltration through liquid light metals are designed.
- pouring liquid aluminum into the mold can either under gravity or under pressure, if necessary with variable pressure ratios be made.
- valve seat rings and valve guides warm up before pouring. This can either be done after the insertion together with the mold or before Be placed in the mold.
- the drawing shows a section of a section in Area of an inlet or outlet channel Cylinder head after the casting process.
- Aluminum melt 1 is the casting core 2 with graded Sections not yet removed.
- the casting core 2 contains an upper cylindrical section 3 and below a second cylindrical section 4 with a larger one Diameter.
- the transition between the two Sections 3, 4 form a flat ring shoulder 5, while the second section 4 at its lower end via an annular shoulder 6 to the outer surface of the cylindrical casting core 2 connects.
- the upper section 3 a prefabricated valve guide 7 and on the lower one Section 4 a prefabricated valve seat ring 8 hung up.
- the corner area is between the cylindrical portion 4 and the Ring shoulder 6 according to the contour of the Valve seat ring 8 is formed.
- Valve seat ring 8 and valve guide 7 are with a open pore volume of 5 to 15% and before preheated before insertion. During the pouring process of the The cylinder head penetrates liquid aluminum into the pores the temperature-controlled valve seat rings and guides 8, 7 and fill it out. The important thing here is uniformity Distribution of the filled pores as well as sufficient Basic strength of the components to be cast.
- pore volume to adjust the valve train components in a graded manner, d. that is, the area with the high thermal and mechanical stress a pore volume of ⁇ 2% has, while the area towards the cylinder head Pore volume in the limit range described above owns. This can be achieved through different degrees of compaction during a Nachpreßvorganges, which is based on the schematic representation in Fig. 2 is explained.
- a powder mixture consisting of an iron-based alloy specially composed for valve seat rings, is molded in a mold 9 to a density of, for example, 6.4 to 6.8 g / cm 3 in accordance with stage 1 of FIG. 2 with a stamp 10 to form a body 11 with an inclined surface Pre-pressed surface.
- This green body is then sintered in a stage 2 at a temperature between 900 and 1200 ° C.
- the sintered blank is given a densification with the aid of a stamp 12, only a geometrically predetermined area of the ring being deformed.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Nonmetallic Welding Materials (AREA)
Description
- Fig. 1
- eine Schnittansicht eines Zylinderkopfes im Bereich einer Ventilführung mit Ventilsitzring und Ventilführung und
- Fig. 2
- eine Prinzipskizze zur Herstellung gradierter Porosität.
Claims (7)
- Verfahren zur Herstellung von Zylinderköpfen für Verbrennungsmotoren durch Vergießen des flüssigen Zylinderkopfmaterials, insbesondere Aluminium, in eine Zylinderkopfform, die einen Gießkern enthält, der abgestufte Abschnitte im Bereich des Ventilsitzringes und der Ventilführung aufweist, dadurch gekennzeichnet, daß Ventilsitzringe (8) und Ventilführungen (7) aus einem für deren Herstellung üblichen Werkstoff auf Eisen- oder Kupfer-Basis durch Pressen und Sintern derart hergestellt werden, daß sie ein offenes Porenvolumen von 5 bis 15 % aufweisen, daß je ein Ventilsitzring (8) und/oder je eine Ventilführung (7) auf die abgestuften Abschnitte (4, 3) des Gießkernes (2) aufgelegt werden, daß anschließend flüssiges Aluminium in die vorgewärmte Gußform eingegossen wird und daß nach dem Erstarren der Aluminiumschmelze (1) der Gießkern (2) in üblicher Weise entfernt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß flüssiges Aluminium unter Schwerkraft oder Druck in die Form eingegossen wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Eingießen des flüssigen Aluminiums unter variablen Druckverhältnissen vorgenommen wird.
- Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Gußform einschließlich Ventilsitzringe (8) und Ventilführungen (7) vor dem Gießen erwärmt wird.
- Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Ventilsitzringe (8) und Ventilführungen (7) vor dem Einlegen in die Gußform erwärmt werden.
- Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß bei der Herstellung der Ventilsitzringe (8) und/oder Ventilführungen (7) durch unterschiedliche Verdichtungsgrade in Bereichen mit hohen thermischen und mechanischen Belastungen ein Porenvolumen von < 2 % erzeugt wird.
- Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß während eines Nachpreßvorganges unterschiedliche Verdichtungsgrade in den Ventilsitzringen (8) und/oder Ventilführungen (7) erzeugt werden.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19612500A DE19612500A1 (de) | 1996-03-29 | 1996-03-29 | Verfahren zur Herstellung von Zylinderköpfen für Verbrennungsmotoren |
DE19612500 | 1996-03-29 | ||
PCT/EP1997/001540 WO1997037107A1 (de) | 1996-03-29 | 1997-03-26 | Verfahren zur herstellung von zylinderköpfen für verbrennungsmotoren |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0890020A1 EP0890020A1 (de) | 1999-01-13 |
EP0890020B1 true EP0890020B1 (de) | 2000-01-05 |
Family
ID=7789822
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97916394A Expired - Lifetime EP0890020B1 (de) | 1996-03-29 | 1997-03-26 | Verfahren zur herstellung von zylinderköpfen für verbrennungsmotoren |
Country Status (9)
Country | Link |
---|---|
US (1) | US6112803A (de) |
EP (1) | EP0890020B1 (de) |
JP (1) | JP2000507504A (de) |
KR (1) | KR20000005112A (de) |
AT (1) | ATE188537T1 (de) |
DE (2) | DE19612500A1 (de) |
ES (1) | ES2144312T3 (de) |
PT (1) | PT890020E (de) |
WO (1) | WO1997037107A1 (de) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2769527B1 (fr) * | 1997-10-10 | 1999-12-03 | Renault | Procede et noyau pour la realisation par moulage d'une culasse de moteur a combustion interne |
FR2789611B1 (fr) * | 1999-02-11 | 2001-04-20 | Fond Du Poitou | Procede de fabrication par moulage d'une culasse d'un moteur a combustion interne et noyau permettant de le mettre en oeuvre |
US6910522B2 (en) * | 1999-07-29 | 2005-06-28 | Consolidated Engineering Company, Inc. | Methods and apparatus for heat treatment and sand removal for castings |
US7275582B2 (en) * | 1999-07-29 | 2007-10-02 | Consolidated Engineering Company, Inc. | Methods and apparatus for heat treatment and sand removal for castings |
US6672367B2 (en) | 1999-07-29 | 2004-01-06 | Consolidated Engineering Company, Inc. | Methods and apparatus for heat treatment and sand removal for castings |
US6622775B2 (en) | 2000-05-10 | 2003-09-23 | Consolidated Engineering Company, Inc. | Method and apparatus for assisting removal of sand moldings from castings |
DE10024302A1 (de) | 2000-05-17 | 2001-11-22 | Alstom Power Nv | Verfahren zur Herstellung eines thermisch belasteten Gussteils |
US6588487B2 (en) | 2000-07-17 | 2003-07-08 | Consolidated Engineering Company, Inc. | Methods and apparatus for utilization of chills for casting |
US7338629B2 (en) * | 2001-02-02 | 2008-03-04 | Consolidated Engineering Company, Inc. | Integrated metal processing facility |
JP2004523362A (ja) * | 2001-02-02 | 2004-08-05 | コンソリデイテッド エンジニアリング カンパニー, インコーポレイテッド | 一体型金属プロセシング設備 |
KR100435702B1 (ko) * | 2002-04-26 | 2004-06-12 | 현대자동차주식회사 | 실린더 헤드의 스파크 플러그 코어핀 |
CA2492073C (en) | 2002-07-11 | 2009-10-20 | Consolidated Engineering Company, Inc. | Method and apparatus for assisting removal of sand moldings from castings |
US6901990B2 (en) * | 2002-07-18 | 2005-06-07 | Consolidated Engineering Company, Inc. | Method and system for processing castings |
DE10343680B4 (de) * | 2003-09-18 | 2017-08-17 | Bleistahl-Produktions Gmbh & Co Kg. | Pulvermetallurgisch gefertigte Ventilführung |
US20060054294A1 (en) * | 2004-09-15 | 2006-03-16 | Crafton Scott P | Short cycle casting processing |
US20060103059A1 (en) | 2004-10-29 | 2006-05-18 | Crafton Scott P | High pressure heat treatment system |
DE102007012845A1 (de) * | 2007-03-17 | 2008-09-18 | Ks Kolbenschmidt Gmbh | Erzeugung eines partiellen Faserverbundgefüges in einem Bauteil über eine Laserumschmelzbehandlung |
JP5516840B2 (ja) * | 2008-10-24 | 2014-06-11 | トヨタ自動車株式会社 | シリンダヘッド鋳造型およびシリンダヘッド鋳造方法 |
CN102748086A (zh) * | 2011-04-21 | 2012-10-24 | 上海汽车集团股份有限公司 | 气门座圈安装结构及其安装方法 |
US20160319411A1 (en) | 2015-04-28 | 2016-11-03 | Consolidated Engineering Company, Inc. | System and method for heat treating aluminum alloy castings |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH251502A (fr) * | 1944-03-18 | 1947-10-31 | Mecanique Du Centre Societe An | Procédé de fabrication d'une culasse de moteur en alliage léger, et culasse de moteur obtenue par ce procédé. |
US3167854A (en) * | 1957-04-02 | 1965-02-02 | Gen Motors Corp | Method and coring for casting and manufacturing cylinder heads and the like |
JPS5116168B2 (de) * | 1972-11-01 | 1976-05-22 | ||
JPS5523892B2 (de) * | 1973-04-03 | 1980-06-25 | ||
JPS60203353A (ja) * | 1984-03-26 | 1985-10-14 | Honda Motor Co Ltd | 内燃機関用シリンダの製造方法 |
JPS61115657A (ja) * | 1984-11-08 | 1986-06-03 | Nissan Motor Co Ltd | カムシヤフトの製造方法 |
DE3444406A1 (de) * | 1984-12-05 | 1986-06-05 | Kolbenschmidt AG, 7107 Neckarsulm | Gegossene bauteile fuer brennkraftmaschinen mit eingegossenen bewehrungskoerpern sowie verfahren zur herstellung der verbindung zwischen den bauteilen und den bewehrungskoerpern |
US4688527A (en) * | 1986-03-31 | 1987-08-25 | Chrysler Motors Corporation | Ceramic valve guide and seat |
BR8700527A (pt) * | 1987-01-29 | 1988-08-16 | Metal Leve Sa | Processo de fabricacao de embolo e embolo para motores de combustao interna |
DE4111676A1 (de) * | 1991-04-10 | 1992-10-15 | Bruehl Aluminiumtechnik | Verfahren zum giessen eines motorblocks aus aluminiumlegierung |
GB9108297D0 (en) * | 1991-04-18 | 1991-06-05 | Gkn Sankey Ltd | Reinforced light metal article and method for its production |
-
1996
- 1996-03-29 DE DE19612500A patent/DE19612500A1/de not_active Withdrawn
-
1997
- 1997-03-26 PT PT97916394T patent/PT890020E/pt unknown
- 1997-03-26 KR KR1019980707753A patent/KR20000005112A/ko not_active Application Discontinuation
- 1997-03-26 ES ES97916394T patent/ES2144312T3/es not_active Expired - Lifetime
- 1997-03-26 DE DE59700975T patent/DE59700975D1/de not_active Expired - Fee Related
- 1997-03-26 JP JP9534911A patent/JP2000507504A/ja active Pending
- 1997-03-26 AT AT97916394T patent/ATE188537T1/de not_active IP Right Cessation
- 1997-03-26 US US09/155,382 patent/US6112803A/en not_active Expired - Fee Related
- 1997-03-26 WO PCT/EP1997/001540 patent/WO1997037107A1/de not_active Application Discontinuation
- 1997-03-26 EP EP97916394A patent/EP0890020B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP2000507504A (ja) | 2000-06-20 |
WO1997037107A1 (de) | 1997-10-09 |
DE19612500A1 (de) | 1997-10-02 |
US6112803A (en) | 2000-09-05 |
KR20000005112A (ko) | 2000-01-25 |
ATE188537T1 (de) | 2000-01-15 |
EP0890020A1 (de) | 1999-01-13 |
PT890020E (pt) | 2000-06-30 |
DE59700975D1 (de) | 2000-02-10 |
ES2144312T3 (es) | 2000-06-01 |
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