EP0146731A2 - Corps céramique creux tubulaire - Google Patents

Corps céramique creux tubulaire Download PDF

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Publication number
EP0146731A2
EP0146731A2 EP84113210A EP84113210A EP0146731A2 EP 0146731 A2 EP0146731 A2 EP 0146731A2 EP 84113210 A EP84113210 A EP 84113210A EP 84113210 A EP84113210 A EP 84113210A EP 0146731 A2 EP0146731 A2 EP 0146731A2
Authority
EP
European Patent Office
Prior art keywords
ceramic body
thickening
hollow
body according
tubular ceramic
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
EP84113210A
Other languages
German (de)
English (en)
Other versions
EP0146731A3 (en
EP0146731B1 (fr
Inventor
Hans Dipl.-Ing. Körkemeier
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche 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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP0146731A2 publication Critical patent/EP0146731A2/fr
Publication of EP0146731A3 publication Critical patent/EP0146731A3/de
Application granted granted Critical
Publication of EP0146731B1 publication Critical patent/EP0146731B1/fr
Expired 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
    • 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
    • F02F1/4264—Shape or arrangement of intake or exhaust channels in cylinder heads of exhaust channels
    • F02F1/4271—Shape or arrangement of intake or exhaust channels in cylinder heads of exhaust channels with an exhaust liner
    • 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
    • F02F7/00—Casings, e.g. crankcases
    • F02F7/0085—Materials for constructing engines or their parts
    • F02F7/0087—Ceramic materials
    • 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 hollow, tubular ceramic body for gas-carrying channels, preferably exhaust channels in a cylinder head of an internal combustion engine.
  • Ceramic bodies of the type mentioned at the outset are cast into a cylinder head made, for example, of an aluminum alloy.
  • this ceramic body is subjected to relatively high loads - casting, shrinking, solidification pressures - which require a rigid cross-sectional shape - circular, oval.
  • Such a cross-sectional shape can hardly be realized over the entire length of, for example, a hot gas-carrying channel of the cylinder head, because the channel is constricted locally in the area of a bore for a valve guide (DE-AS 27 50 290).
  • Such a constriction must be compensated for by the cross-sectional design of the channel in order to avoid a reduction in cross-section that would impair the gas flow.
  • the object of the invention is therefore to take such precautions on a tubular, hollow ceramic body that on the one hand it can be adapted to the structural conditions in a channel and on the other hand withstands the loads occurring during casting.
  • the ceramic body has such a strength that it withstands the stresses that occur when casting with the cylinder head.
  • Zirconium oxide is suitable as the material for the thickening, the entire outer surface of the ceramic body also being coated with this zirconium oxide, for example applied by plasma spraying.
  • This coating which has a roughened surface, ensures good pouring behavior of the ceramic body, and it also supports its thermal insulation with respect to the cylinder head. If the ceramic body has two pipe sections which merge into a single piece of pipe - pants shape - and if the thickening is provided as a support between the pipe sections, it is ensured that this ceramic body can withstand the pressures that occur when the cylinder head is cast without damage.
  • a hollow, tubular ceramic body 1 (Tialit ceramic) is shown, which is inserted into an outlet channel 2, that is, a hot gas-carrying channel of a cylinder head 3 shown only in regions and made of a cast aluminum alloy.
  • the ceramic body 1 has an essentially constant wall thickness, which is produced by the manufacturing process.
  • the cylinder head 3 has a vertical bore 4, which is provided with a sleeve-like extension 5 projecting into the exhaust port 2.
  • a guide device 6 for a valve 7, which controls the gas flow in the ceramic body 1, is pressed into the bore 4.
  • the ceramic body 1 In the region of the bore 4 or adjacent to it, the ceramic body 1 has a constriction 8, which results from the connection of the ceramic body to the bore 4 or the extension 5 and its flow-optimized cross-sectional shape.
  • the constriction 8 is filled with a thickening 9 for reasons of strength, the outside 10 of which is raised or convex.
  • the thickening 9 is adapted outside the constriction 8 at B and C to the shape of the ceramic body 1.
  • the ceramic body 1 has a convex shape in the region of the thickening 9, which is similar to the design of the ceramic body 1 on the opposite side 11.
  • the thickening 9 consists of the material zirconium oxide, which is applied by plasma spraying; the ceramic body 1 is provided on the outside with a coating 12 made of said material.
  • a ceramic body 13 has two mutually spaced pipe sections 14, 15, which merge at 16 into a single piece of pipe 17 (pants shape). Both pipe sections 14, 15 run within outlet channels of a cylinder, not shown, i. that is, there are two exhaust valves per ZyLinder. So that the forces occurring during casting at D and E on the ceramic body 13 do not cause any damaging moments, a thickening 18 is provided between the pipe sections 14, 15, which performs a supporting function. According to FIG. 5, the thickening 18 fills the space between the pipe sections 14, 15, the borders 19, 20 of the thickening also being raised and passing into the shape of the pipe sections 14, 15. The thickening extends over the height and the length of the pipe sections 14, 15.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Ceramic Products (AREA)
  • Exhaust Silencers (AREA)
EP84113210A 1983-12-22 1984-11-02 Corps céramique creux tubulaire Expired EP0146731B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3346394A DE3346394C2 (de) 1983-12-22 1983-12-22 Hohler, rohrartiger Keramikkörper
DE3346394 1983-12-22

Publications (3)

Publication Number Publication Date
EP0146731A2 true EP0146731A2 (fr) 1985-07-03
EP0146731A3 EP0146731A3 (en) 1986-08-20
EP0146731B1 EP0146731B1 (fr) 1989-01-11

Family

ID=6217691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84113210A Expired EP0146731B1 (fr) 1983-12-22 1984-11-02 Corps céramique creux tubulaire

Country Status (4)

Country Link
US (1) US4648243A (fr)
EP (1) EP0146731B1 (fr)
JP (1) JPS60169655A (fr)
DE (2) DE3346394C2 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3536804A1 (de) * 1985-10-16 1987-04-16 Audi Ag Abblaseventil
EP0285312A3 (en) * 1987-03-24 1989-03-22 Ngk Insulators, Ltd. Ceramic materials to be insert-cast and ceramic port liners
EP0292040A3 (en) * 1987-05-16 1989-09-20 Ae Plc Cylinder liners
US5260116A (en) * 1987-03-24 1993-11-09 Ngk Insulators, Ltd. Ceramicm port liners
GB2288210B (en) * 1994-04-08 1998-09-09 Ford Motor Co Internal combustion engine
WO2013045018A3 (fr) * 2011-10-01 2014-01-23 Volkswagen Aktiengesellschaft Culasse munie d'un collecteur d'échappement intégré, destinée à un moteur à combustion interne, et procédé de fabrication d'une pièce coulée, en particulier d'une culasse pour un moteur à combustion interne

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3706206C1 (en) * 1987-02-26 1988-10-06 Feldmuehle Ag Tubular ceramic body of aluminium titanate having an oxide-containing coating and process for the production thereof
DE3706207C1 (en) * 1987-02-26 1988-10-06 Feldmuehle Ag Tubular ceramic body of aluminium titanate having an oxide-ceramic coating
DE3706208C1 (de) * 1987-02-26 1987-10-22 Feldmuehle Ag Rohrfoermig ausgebildeter Keramikkoerper
JPS63268963A (ja) * 1987-04-27 1988-11-07 Ngk Insulators Ltd セラミツクポ−トライナ−
JPH01142547U (fr) * 1988-03-24 1989-09-29
US5142863A (en) * 1989-05-18 1992-09-01 Honda Giken Kogyo Kabushiki Kaisha Engine part provided with manifold type exhaust passage
JP2790866B2 (ja) * 1989-08-24 1998-08-27 日産自動車株式会社 燃焼装置の排気通路
US5137789A (en) * 1990-12-03 1992-08-11 Caterpillar Inc. Composite ceramic and metal article
US6125891A (en) * 1996-03-15 2000-10-03 Silicon Carbide Products, Inc. Refractory u-bends and methods of manufacture
CN106762194A (zh) * 2017-01-24 2017-05-31 李斯特技术中心（上海）有限公司 一种自然吸气发动机的排气通道

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1954638A (en) * 1932-02-18 1934-04-10 Rudolph W Loeffler Method of making enameled radiators
US2635329A (en) * 1950-05-16 1953-04-21 Magnaflux Corp Method of detecting cracks in porous surfaces
CA1056246A (fr) * 1975-04-22 1979-06-12 Shuichi Yamazaki Garniture d'orifices d'echappement de moteurs
DE2549256C2 (de) * 1975-11-04 1983-12-29 Volkswagenwerk Ag, 3180 Wolfsburg Wärmeisolierte Anordnung zur Durchleitung von unter hohen Temperaturen stehenden Gasen
DE2642486A1 (de) * 1976-09-22 1978-03-23 Audi Nsu Auto Union Ag Verfahren zur herstellung eines gehaeuses fuer brennkraftmaschinen
DE2750290C3 (de) * 1977-11-10 1987-07-09 Hoechst CeramTec AG, 8672 Selb Verwendung eines gebrannten keramischen Formkörpers zur Herstellung von Metall-Keramik-Verbundkörpern
US4346556A (en) * 1980-05-12 1982-08-31 General Motors Corporation Insulating engine exhaust port liner
DE3309699A1 (de) * 1983-03-18 1984-09-27 Feldmühle AG, 4000 Düsseldorf Waermeisolierende auskleidung

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3536804A1 (de) * 1985-10-16 1987-04-16 Audi Ag Abblaseventil
EP0285312A3 (en) * 1987-03-24 1989-03-22 Ngk Insulators, Ltd. Ceramic materials to be insert-cast and ceramic port liners
EP0437302A3 (en) * 1987-03-24 1991-08-07 Ngk Insulators, Ltd. Ceramic port liners
US5055435A (en) * 1987-03-24 1991-10-08 Ngk Insulators, Ltd. Ceramic materials to be insert-cast
US5260116A (en) * 1987-03-24 1993-11-09 Ngk Insulators, Ltd. Ceramicm port liners
EP0292040A3 (en) * 1987-05-16 1989-09-20 Ae Plc Cylinder liners
GB2288210B (en) * 1994-04-08 1998-09-09 Ford Motor Co Internal combustion engine
WO2013045018A3 (fr) * 2011-10-01 2014-01-23 Volkswagen Aktiengesellschaft Culasse munie d'un collecteur d'échappement intégré, destinée à un moteur à combustion interne, et procédé de fabrication d'une pièce coulée, en particulier d'une culasse pour un moteur à combustion interne
EP2761157A2 (fr) * 2011-10-01 2014-08-06 Volkswagen Aktiengesellschaft Culasse munie d'un collecteur d'échappement intégré, destinée à un moteur à combustion interne, et procédé de fabrication d'une pièce coulée, en particulier d'une culasse pour un moteur à combustion interne

Also Published As

Publication number Publication date
JPS60169655A (ja) 1985-09-03
EP0146731A3 (en) 1986-08-20
US4648243A (en) 1987-03-10
DE3346394A1 (de) 1985-07-11
EP0146731B1 (fr) 1989-01-11
DE3476100D1 (en) 1989-02-16
DE3346394C2 (de) 1986-09-04

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