EP0047835A1 - Light-metal cylinder head for a valve-controlled internal-combustion engine - Google Patents

Light-metal cylinder head for a valve-controlled internal-combustion engine Download PDF

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Publication number
EP0047835A1
EP0047835A1 EP81105588A EP81105588A EP0047835A1 EP 0047835 A1 EP0047835 A1 EP 0047835A1 EP 81105588 A EP81105588 A EP 81105588A EP 81105588 A EP81105588 A EP 81105588A EP 0047835 A1 EP0047835 A1 EP 0047835A1
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EP
European Patent Office
Prior art keywords
oxide layer
cylinder head
area
valve
combustion engine
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.)
Withdrawn
Application number
EP81105588A
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German (de)
French (fr)
Inventor
Emil Dipl.-Ing. Lichtner
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 EP0047835A1 publication Critical patent/EP0047835A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/02—Surface coverings of combustion-gas-swept parts
    • 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
    • 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 
    • F02F2001/008—Stress problems, especially related to thermal stress
    • 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
    • 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
    • F02F2001/248—Methods for avoiding thermal stress-induced cracks in the zone between valve seat openings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/021—Aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2203/00—Non-metallic inorganic materials
    • F05C2203/08—Ceramics; Oxides

Definitions

  • the invention relates to a device of the type specified in the preamble of the first claim.
  • Such a cylinder head is known from DE-OS 29 04 940. Deposits have the task of helping to prevent heat cracks in the floor area between the valves.
  • the oxide layer has a different thermal expansion than the light metal. This creates large tensile stresses in the oxide layer at operating temperature, so that the adjacent light metal area is also still under tensile stress. This prevents the otherwise on occurring compressive stresses that lead to heat cracks. Furthermore, the oxide layer prevents cavities from forming in the cylinder bottom area in the combustion chamber floor area, which were otherwise observed after a long period of use.
  • this oxide layer meant that sheet metal inserts had to be covered when the oxide layer was applied; which, on the one hand, was time-consuming and expensive.
  • a minimum adhesive distance of 2 mm had to be maintained, although this distance between the hole (s) and the adjacent webs could not be maintained for design reasons. That is why it has already been suggested to make the inserts from titanium. Although this has proven itself, the price for the insert has increased, so that the entire cylinder head has become more expensive.
  • this object is achieved by the characterizing features of the first claim.
  • the advantage of this arrangement is that the inserts - as previously known - can consist of sheet metal. They are only covered with a resistant material in the area where they can come into contact with the crack-preventing oxide layer.
  • An aluminum oxide layer that is applied by anodic oxidation has proven to be a crack-preventing oxide layer.
  • the cladding of the sheet inserts with aluminum or ceramic is particularly suitable. Methods for applying these materials to metal sheets are known per se and are also suitable for large-scale production. Since these materials are resistant to the crack-preventing oxide layer, the time-consuming covering of the bridge inlays is eliminated.
  • the exhaust valve opening is designated 2, the intake valve opening 3, and the somewhat curved cylinder head base 4.
  • the expansion joints 6 and 7 are filled with web inserts 8 (sheets) and can in particular have the cross-sectional shape visible in FIG. 2.
  • This embodiment has prevented the heat cracking in the bottom area between the valves, but not in every case that in the area of the nozzle and / or ignition aid bore 10, as well as those which in the presence of a firing channel originated from this and extend into the outer sealing area of the cylinder head bottom propagated with the cylinder barrel.
  • the cylinder head together with the web inserts, is immersed in an acid bath after manufacture, where the cylinder head is switched as an anode, and when direct or alternating current with a high current density is applied, a reinforced aluminum oxide layer forms that grows in firmly.
  • the cylinder head 1 remains in the bath.
  • the layer thickness is usually sufficient if it has grown to at least 50 pm.
  • the web inserts 8 are made of steel, they are attacked when the oxide layer is applied. For this reason, they are in their upper region, ie in the region in which they are in contact with the crack-preventing oxide layer long, coated with a layer that is not attacked by the crack-preventing oxide layer.
  • a coating made of aluminum or ceramic is suitable for this purpose, which is applied to the cylinder head base in a manner known per se before the web inserts are poured into the cylinder head base.

Abstract

Ein Leichtmetallzylinderkopf (1) mit einer Oxidbeschichtung zum Schutz des Bodenbereichs (5) gegen Wärmespannungen und einer Bohrung (10) im Ventilsteg für Einspritzdüse, Starthilfe oder Schußkanal hat im Bereich zwischen den Ventilöffnungen (2, 3) eingegossene Stahlblecheinlagen (6, 7), die zum Schutz bei der Oxidierung des Brennraumbodens ihrerseits mit Aluminium oder Keramik beschichtet sind.A light metal cylinder head (1) with an oxide coating to protect the base area (5) against thermal stress and a hole (10) in the valve web for the injection nozzle, starting aid or firing channel has cast steel sheet inserts (6, 7) in the area between the valve openings (2, 3), which in turn are coated with aluminum or ceramic to protect the floor of the combustion chamber from oxidation.

Description

Die Erfindung bezieht sich auf eine Vorrichtung der im Oberbegriff des ersten Anspruchs angegebenen Art.The invention relates to a device of the type specified in the preamble of the first claim.

Ein derartiger Zylinderkopf ist aus der DE-OS 29 04 940 bekannt. Einlagen haben hierin die Aufgabe, zur Verhinderung von Wärmerissen im Bodenbereich zwischen den Ventilen beizutragen.Such a cylinder head is known from DE-OS 29 04 940. Deposits have the task of helping to prevent heat cracks in the floor area between the valves.

Werden jedoch Zylinderköpfe mit zentraler Einspritzdüse oder einem Schußkanal und/oder Zündhilfe ausgerüstet, so können die Stegeinlagen nicht verhindern, daß im Bereich der Düsen-, Schußkanal- und Zündhilfebohrung Wärmerisse auftreten, die auch bis zu den Ventilsitzen oder bis zu den äußeren Dichtflächen am Zylinderboden laufen.However, if cylinder heads are equipped with a central injection nozzle or a firing channel and / or ignition aid, the web inserts cannot prevent heat cracks from occurring in the area of the nozzle, firing channel and ignition aid bore, which also extends to the valve seats or to the outer sealing surfaces on the cylinder base to run.

Aus diesem Grunde ist weiterhin in der Schrift vorgeschlagen worden, den gefährdeten Bodenbereich mit einer rißverhindernden Oxydschicht zu überziehen. Mit der Oxydschicht wird zum einen ein Abbau von Temperaturspitzen erreicht, so daß eine Vergleichsmäßigung der Zylinderkopfbodentemperatur erzielt wird. Zum anderen besitzt die Oxydschicht-gegenüber dem Leichtmetall eine unterschiedliche Wärmeausdehnung. Dadurch entstehen bei Betriebstemperatur große Zugspannungen in der Oxydschicht, so daß der angrenzende Leichtmetallbereich ebenfalls noch unter Zugspannung steht. Damit wird verhindert, daß die sonst auftretenden Druckspannungen eintreten, die zu Wärmerissen führen. Desweiteren wird durch die Oxydschicht verhindert, daß sich im Brennraumbodenbereich im Zylinderboden Lunker bilden, die sonst nach längerer Einsatzzeit bebachtet wurden.For this reason, it has also been proposed in the publication to cover the endangered floor area with a crack-preventing oxide layer. With the oxide layer, temperature peaks are reduced on the one hand, so that the cylinder head floor temperature is evened out. On the other hand, the oxide layer has a different thermal expansion than the light metal. This creates large tensile stresses in the oxide layer at operating temperature, so that the adjacent light metal area is also still under tensile stress. This prevents the otherwise on occurring compressive stresses that lead to heat cracks. Furthermore, the oxide layer prevents cavities from forming in the cylinder bottom area in the combustion chamber floor area, which were otherwise observed after a long period of use.

Diese Oxydschicht bedingte jedoch, daß Einlagen aus Blech bei dem Aufbringen der Oxydschicht abgedeckt werden mußten; was zum einen zeitaufwendig und kostspielig war. Zum anderen mußte ein Mindestklebeabstand von 2 mm eingehalten werden, wobei dieser Abstand zwischen der (den) Bohrung (en) und den benachbarten Stegen aus konstruktiven Gründen nicht eingehalten werden konnten. Deshalb hat man bereits vorgeschlagen, die Einlagen aus Titan zu fertigen. Dies hat sich zwar bewährt, jedoch ist dadurch der Preis für die Einlage angestiegen, so daß sich der gesamte Zylinderkopf verteuerte.However, this oxide layer meant that sheet metal inserts had to be covered when the oxide layer was applied; which, on the one hand, was time-consuming and expensive. On the other hand, a minimum adhesive distance of 2 mm had to be maintained, although this distance between the hole (s) and the adjacent webs could not be maintained for design reasons. That is why it has already been suggested to make the inserts from titanium. Although this has proven itself, the price for the insert has increased, so that the entire cylinder head has become more expensive.

Aufgabe der vorliegenden Erfindung ist es deshlab, bei einer Vorrichtung der eingangs genannten Art Einlagen aufzuzeigen, die in der Herstellung billiger sind und ebenfalls gegenüber dem Verfahren zum Aufbringen der rißverhindernden Oxydschicht widerstandsfähig sind.It is therefore an object of the present invention to show inlays in a device of the type mentioned at the outset which are cheaper to produce and which are likewise resistant to the process for applying the crack-preventing oxide layer.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des ersten Anspruchs gelöst. Der Vorteil dieser Anordnung besteht darin, daß die Einlagen - wie bisher bekannt - aus Blechen bestehen können. Sie werden nur in dem Bereich, in dem sie mit der rißverhindernden Oxydschicht in Kontakt gelangen können, mit einem widerstandsfähigen Material verkleidet.According to the invention, this object is achieved by the characterizing features of the first claim. The advantage of this arrangement is that the inserts - as previously known - can consist of sheet metal. They are only covered with a resistant material in the area where they can come into contact with the crack-preventing oxide layer.

Als rißverhindernde Oxydschicht hat sich eine Aluminiumoxydschicht, die durch anodische Oxydation aufgetragen wird, bewährt. Bei der Verwendung von Aluminiumoxyd als rißverhindernde Schutzschicht eignet sich insbesondere die Verkleidung der Blecheinlagen mit Aluminium oder Keramik. Verfahren zum Aufbringen dieser Materialen auf Bleche sind an sich bekannt und auch für eine Großserienfertigung geeignet. Da diese Materialien widerstandsfähig gegen die rißverhindernde Oxydschicht sind, fällt das zeitraubende Abdecken der Stegeinlagen fort.An aluminum oxide layer that is applied by anodic oxidation has proven to be a crack-preventing oxide layer. When using aluminum oxide as a crack-preventing protective layer, the cladding of the sheet inserts with aluminum or ceramic is particularly suitable. Methods for applying these materials to metal sheets are known per se and are also suitable for large-scale production. Since these materials are resistant to the crack-preventing oxide layer, the time-consuming covering of the bridge inlays is eliminated.

Im folgenden wird die Erfindung anhand eines bevorzugten Ausführungsbeispiels näher erläutert.The invention is explained in more detail below on the basis of a preferred exemplary embodiment.

Es stellen dar:

  • Abb. 1 einen Zylinderkopf einer ventilgesteuerten Brennkraftmäschine in Draufsicht auf den Zylinderkopfboden;
  • Abb. 2 einen Zylinderkopf nach Abb. 1 im Schnitt nach der Linie II - II.
They represent:
  • Fig. 1 shows a cylinder head of a valve-controlled internal combustion engine in a plan view of the bottom of the cylinder head;
  • Fig. 2 shows a cylinder head according to Fig. 1 in section along the line II - II.

Bei dem abgebildeten Zylinderkopf 1 sind die Auslaßventil- öffnung mit 2, die Einlaßventilöffnung mit 3 und der etwas gewölbte Zylinderkopfboden mit 4 bezeichnet. Der zwischen den beiden Ventilöffnungen 2 und 3 liegende, thermisch hoch beanspruchte und daher besonders stark zur Rißbildung neigende Bodenbereich 5, welcher auch den Randbereich der Bohrung 10 für die Einspritzdüse und/oder Zündhilfe mit umschließen kann, ist gegen den außenliegenden Bodenbereich durch Dehnfugen 6 und 7 abgetrennt, die von Ventilöffnung zu Ventilöffnung verlaufen. Die Dehnfugen 6 und 7 sind mit Stegeinlagen 8 (Blechen) ausgefüllt und können insbesondere die in Abb. 2 sichtbare Querschnittsform aufweisen.In the cylinder head 1 shown, the exhaust valve opening is designated 2, the intake valve opening 3, and the somewhat curved cylinder head base 4. The bottom area 5, which is located between the two valve openings 2 and 3 and is highly thermally stressed and therefore particularly prone to cracking, which can also enclose the edge area of the bore 10 for the injection nozzle and / or ignition aid, is against the outside bottom area by expansion joints 6 and 7 separated that run from valve opening to valve opening. The expansion joints 6 and 7 are filled with web inserts 8 (sheets) and can in particular have the cross-sectional shape visible in FIG. 2.

Diese Ausführungsform hat die Wärmerisse in den Bodenbereich zwischen den Ventilen verhindert, nicht jedoch in jedem Fall die im Bereich der Düsen- und/oder Zündhilfebohrung 10, sowie diejenigen, die bei Vorhandensein eines Schußkanals von diesem ausgingen und sich bis in den äußeren Dichtungsbereich des Zylinderkopfbodens mit dem Zylinderrohr fortpflanzten.This embodiment has prevented the heat cracking in the bottom area between the valves, but not in every case that in the area of the nozzle and / or ignition aid bore 10, as well as those which in the presence of a firing channel originated from this and extend into the outer sealing area of the cylinder head bottom propagated with the cylinder barrel.

Aus diesem Grunde wird der Zylinderkopf nach der Herstellung mitsamt den Stegeinlagen in ein saures Bad getaucht, dort wird der Zylinderkopf als Anode geschaltet und bei Anlegen von Gleich- oder Wechselstrom hoher Stromdichte bildet sich eine verstärkte Aluminiumoxydschicht, die fest einwächst. Je nach Größe der zu beschichtenden Fläche und Schichtdicke der Oxydschicht verbleibt der Zylinderkopf 1 in dem Bad. Die Schichtstärke ist üblicherweise ausreichend, wenn sie auf mindestens 50 pm angewachsen ist. Je nach Größe des Zylinderkopfbodens kann es hierbei sinnvoll sein,den Bodenbereich, welcher nicht zu den rißgefährdeten Bereichen zählt, durch eine Maske abzudecken.For this reason, the cylinder head, together with the web inserts, is immersed in an acid bath after manufacture, where the cylinder head is switched as an anode, and when direct or alternating current with a high current density is applied, a reinforced aluminum oxide layer forms that grows in firmly. Depending on the size of the surface to be coated and the layer thickness of the oxide layer, the cylinder head 1 remains in the bath. The layer thickness is usually sufficient if it has grown to at least 50 pm. Depending on the size of the cylinder head base, it can be useful to cover the base area, which is not a crack-prone area, with a mask.

Da die Stegeinlagen 8 aus Stahl sind, werden sie be dem Aufbringen der Oxydschicht angegriffen. Aus diesem Grund sind sie in ihrem oberen Bereich, d. h. in dem Bereich, in dem sie mit der rißverhindernden Oxydschicht in Kontakt gelangen, mit einer Schicht überzogen, die von der rißverhindernden Oxydschicht nicht angegriffen wird. Geeignet ist hierfür ein Überzug aus Aluminium oder Keramik, der auf an sich bekannte Weise vor dem Eingießen der Stegeinlagen in den Zylinderkopfboden auf diese aufgebracht wird.Since the web inserts 8 are made of steel, they are attacked when the oxide layer is applied. For this reason, they are in their upper region, ie in the region in which they are in contact with the crack-preventing oxide layer long, coated with a layer that is not attacked by the crack-preventing oxide layer. A coating made of aluminum or ceramic is suitable for this purpose, which is applied to the cylinder head base in a manner known per se before the web inserts are poured into the cylinder head base.

Claims (2)

1. Leichtmetallzylinderkopf für eine ventilgesteuerte Brennkraftmaschine, welcher in seinem zwischen den Ventilen liegenden Bodenbereich mindestens eine in diesem Boden eingelassene Einlage und eine im Brennraumbodenbereich vorgesehene Bohrung für eine Einspritzdüse oder einen Schußkanal und/oder eine Zündhilfe aufweist, wobei zumindest der zwischen den Ventilen liegende Bodenbereich einschließlich des Bohrungsbereiches mit einer' rißverhindernden Oxydschicht überzogen ist, dadurch gekennzeichnet, daß die Einlage (8) in ihrem mit des Oxydschicht in Kontakt gelangenden Bereich mit einer gegenüber dem Verfahren zur Erzeugung der Oxydschicht widerstandsfähigem Material verkleidet ist.1.Alloy cylinder head for a valve-controlled internal combustion engine, which has in its floor area lying between the valves at least one insert embedded in this floor and a hole provided in the combustion chamber floor area for an injection nozzle or a firing channel and / or an ignition aid, at least the floor area lying between the valves including the bore area is covered with a ' crack-preventing oxide layer, characterized in that the insert (8) is lined in its area which comes into contact with the oxide layer with a material which is resistant to the process for producing the oxide layer. 2. Ventilgesteuerte Brennkraftmaschine nach Anspruch 1, wobei die Oxydschicht aus Aluminium besteht und durch anodische Oxydation erzeugt ist, dadurch gekennzeichnet, daß die Einlage (8) in dem mit der Oxydschicht in Kontakt gelangenden Bereich keramisiert oder aluminisiert ist.2. Valve-controlled internal combustion engine according to claim 1, wherein the oxide layer consists of aluminum and is produced by anodic oxidation, characterized in that the insert (8) in the area coming into contact with the oxide layer is ceramized or aluminized.
EP81105588A 1980-09-13 1981-07-16 Light-metal cylinder head for a valve-controlled internal-combustion engine Withdrawn EP0047835A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3034591 1980-09-13
DE3034591A DE3034591C2 (en) 1980-09-13 1980-09-13 Light metal cylinder head for a valve-controlled internal combustion engine

Publications (1)

Publication Number Publication Date
EP0047835A1 true EP0047835A1 (en) 1982-03-24

Family

ID=6111867

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81105588A Withdrawn EP0047835A1 (en) 1980-09-13 1981-07-16 Light-metal cylinder head for a valve-controlled internal-combustion engine

Country Status (4)

Country Link
US (1) US4426963A (en)
EP (1) EP0047835A1 (en)
CA (1) CA1177348A (en)
DE (1) DE3034591C2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3524776A1 (en) * 1985-07-11 1987-01-22 Kloeckner Humboldt Deutz Ag Web insert in the cylinder head of an internal combustion engine
US4844030A (en) * 1985-12-12 1989-07-04 Cummins Engine Company, Inc. Thermal fatigue resistant cylinder head
DE3721029A1 (en) * 1987-06-25 1989-01-05 Alcan Gmbh CYLINDER HEAD FOR AN INTERNAL COMBUSTION ENGINE
US4962733A (en) * 1989-09-29 1990-10-16 Caterpillar Inc. Device for reducing thermal restraint
FR2736967B1 (en) * 1995-07-18 1997-08-29 Renault CYLINDER HEAD OF INTERNAL COMBUSTION ENGINE WITH LOW THICKNESS INSERTS
FR2883043B1 (en) * 2005-03-11 2010-07-30 Renault Sas INTERNAL COMBUSTION ENGINE CYLINDER HEAD WITH INSERT AND ENGINE

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE969934C (en) * 1943-07-25 1958-07-31 Messerschmitt Boelkow Blohm Composite metal pistons
DE2433698A1 (en) * 1973-11-22 1975-05-28 Toyota Motor Co Ltd High-strength ceramic linings - contg. water absorbing fired refractory aggregate and alumina cement mixt impregnated with heat-resistant binder
DE2847249A1 (en) * 1978-10-31 1980-06-12 Maschf Augsburg Nuernberg Ag Cylinder head assembly for IC engine - has insert between valve openings to reduce formation of cracks due to overheating
DE2904940A1 (en) * 1979-02-09 1980-08-21 Kloeckner Humboldt Deutz Ag LIGHT METAL CYLINDER HEAD FOR A VALVE CONTROLLED INTERNAL COMBUSTION ENGINE

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1902282U (en) * 1964-06-20 1964-10-15 Otto Schuchmacher K G CYLINDER COVER FOR POWER AND WORK MACHINES.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE969934C (en) * 1943-07-25 1958-07-31 Messerschmitt Boelkow Blohm Composite metal pistons
DE2433698A1 (en) * 1973-11-22 1975-05-28 Toyota Motor Co Ltd High-strength ceramic linings - contg. water absorbing fired refractory aggregate and alumina cement mixt impregnated with heat-resistant binder
DE2847249A1 (en) * 1978-10-31 1980-06-12 Maschf Augsburg Nuernberg Ag Cylinder head assembly for IC engine - has insert between valve openings to reduce formation of cracks due to overheating
DE2904940A1 (en) * 1979-02-09 1980-08-21 Kloeckner Humboldt Deutz Ag LIGHT METAL CYLINDER HEAD FOR A VALVE CONTROLLED INTERNAL COMBUSTION ENGINE

Also Published As

Publication number Publication date
DE3034591C2 (en) 1985-10-03
DE3034591A1 (en) 1982-04-29
CA1177348A (en) 1984-11-06
US4426963A (en) 1984-01-24

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