WO1999038629A1 - Verfahren zum herstellen eines zylinderkopfes einer brennkraftmaschine - Google Patents
Verfahren zum herstellen eines zylinderkopfes einer brennkraftmaschine Download PDFInfo
- Publication number
- WO1999038629A1 WO1999038629A1 PCT/EP1998/007254 EP9807254W WO9938629A1 WO 1999038629 A1 WO1999038629 A1 WO 1999038629A1 EP 9807254 W EP9807254 W EP 9807254W WO 9938629 A1 WO9938629 A1 WO 9938629A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas exchange
- partition
- combustion engine
- internal combustion
- plate
- Prior art date
Links
Classifications
-
- 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
-
- 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
- F02F1/4235—Shape or arrangement of intake or exhaust channels in cylinder heads of intake channels
- F02F1/4242—Shape or arrangement of intake or exhaust channels in cylinder heads of intake channels with a partition wall inside the channel
-
- 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
- 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
-
- 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
- F02F2200/00—Manufacturing
- F02F2200/06—Casting
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the invention relates to a method for producing a cylinder head of an internal combustion engine with sand cores for forming corresponding gas exchange channels, in particular for a motor vehicle, a separator plate being arranged in at least one gas exchange channel, according to the preamble of claim 1.
- the invention further relates to a separator plate, according to the preamble of claim 6.
- the invention is based on the object of specifying a method for producing a cylinder head of an internal combustion engine, in which a separating plate is arranged within a gas exchange duct in a flow-favorable and technically favorable manner.
- the separating plate is arranged in the sand core of the corresponding gas exchange channel to be provided with a separating plate.
- Chill casting is preferably used as the casting process, with the individual sand cores being used in a steel box, the cores dissolving after the casting process.
- the dividing plate then remains, which is thus integrated in the gas exchange duct.
- the separating plate is advantageously a tumble plate.
- the partition plate is formed with side tabs which protrude from the sand core. These flags are both assembly aids and anchor points for the divider in the cast material.
- the mold casting is expediently a gray cast iron or an aluminum cast, alternatively also a magnesium cast.
- the gas exchange duct is at least one inlet duct for supplying combustion air to the internal combustion engine, at least one return duct for exhaust gas recirculation into a combustion intake air flow and / or at least one outlet duct for exhaust gas discharge from the internal combustion engine.
- a partition plate is equipped with side flags to facilitate assembly and anchoring in the casting material.
- this divider can be integrated into a sand core for a gas exchange channel for a mold casting process, so that the divider at the same time as the manufacturer tion of the cylinder head is formed in the corresponding gas exchange channel and is firmly anchored in the walls of the gas exchange channel by means of the mounting ears.
- the separating plate is advantageously a tumble plate.
- the partition plate In order to achieve a low flow resistance through the partition plate, it advantageously has a material thickness of 0.5 to 1.5 mm, preferably 0.6 to 1.0 mm, in particular 0.8 mm.
- the separating plate has at one end a longitudinal slot which forms two legs, the two legs each projecting into a gas exchange channel.
- FIG. 1 shows an inlet channel of a cylinder head of an internal combustion engine in cross section
- Fig. 3 shows a preferred embodiment of a partition plate according to the invention in supervision
- FIG. 4 shows a sand core provided with the preferred embodiment of a partition plate according to the invention from FIG. 3 in supervision.
- a separating plate 14 in the form of a tumble plate is arranged in the inlet channel 10.
- the tumble plate 14 divides a gas flow in the inlet duct 10 into two partial flows, which reunite at a downstream end 16 of the tumble plate.
- FIG. 2 shows in a view in the direction of arrow A of FIG. 1 the division of the inlet channel 10 by the partition plate 14. 4
- FIG. 3 illustrates a preferred embodiment of a separating plate 14 according to the invention. This is produced before the cylinder head 12 is cast and has two flags 18, which initially serve as assembly ears. A longitudinal slot 22 is formed at a downstream end 20 of the separating plate 14 and divides the separating plate 14 into two legs 24 at this end. According to the invention, this partition plate 14 is baked into a sand core 26 for a mold casting of the cylinder head 12, this lost sand core 26 forming the inlet channel 10 during the casting process.
- FIG. 4 Such a sand core 26 with a baked separating plate 14 is shown in FIG. 4.
- the flags 18 protrude from the sand core 26 so that they protrude into a wall of the inlet channel 10 formed during the casting process and ensure that the partition plate 14 is firmly anchored in the inlet channel 10.
- the arrangement of sand core 26 and partition plate 14 is such that a part of a side region 28 of the partition plate 14 protrudes laterally from the sand core 26. This ensures that, regardless of manufacturing tolerances, the inlet channel 10 is in any case divided into two channels separated from one another in a gastight manner in the region of the separating plate.
- the sand core 26 forms an outlet point for two gas channels.
- the separating plate 14 is arranged up to this junction point, one leg 24 (FIG. 3) protruding into an opening channel.
- the above explanations regarding the inlet duct 10 are only exemplary.
- the method according to the invention with the partition plate 14 according to the invention can be used on every gas exchange duct in the cylinder head 12, that is to say, for example, also on an exhaust duct which leads exhaust gas out of the cylinder head or an exhaust gas recirculation duct which leads exhaust gas back into an intake air flow.
- the separating plate 14 can also be curved so as to be flexible.
- devices for receiving a shut-off device for one of the subchannels of the inlet channel 10 can already be provided on the partition plate 14 during its manufacture or before the casting.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000529911A JP2002501829A (ja) | 1998-01-31 | 1998-11-12 | 内燃機関のシリンダヘッドを製造する方法 |
AT98964397T ATE206337T1 (de) | 1998-01-31 | 1998-11-12 | Verfahren zum herstellen eines zylinderkopfes einer brennkraftmaschine |
KR1020007008273A KR20010034463A (ko) | 1998-01-31 | 1998-11-12 | 내연기관의 실린더 헤드 제조 방법 |
DE59801670T DE59801670D1 (de) | 1998-01-31 | 1998-11-12 | Verfahren zum herstellen eines zylinderkopfes einer brennkraftmaschine |
EP98964397A EP1051273B1 (de) | 1998-01-31 | 1998-11-12 | Verfahren zum herstellen eines zylinderkopfes einer brennkraftmaschine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803867A DE19803867A1 (de) | 1998-01-31 | 1998-01-31 | Verfahren zum Herstellen eines Zylinderkopfes einer Brennkraftmaschine |
DE19803867.4 | 1998-01-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999038629A1 true WO1999038629A1 (de) | 1999-08-05 |
Family
ID=7856300
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1998/007254 WO1999038629A1 (de) | 1998-01-31 | 1998-11-12 | Verfahren zum herstellen eines zylinderkopfes einer brennkraftmaschine |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1051273B1 (de) |
JP (1) | JP2002501829A (de) |
KR (1) | KR20010034463A (de) |
AT (1) | ATE206337T1 (de) |
DE (2) | DE19803867A1 (de) |
ES (1) | ES2165713T3 (de) |
WO (1) | WO1999038629A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7198026B2 (en) | 2005-04-19 | 2007-04-03 | Nissan Motor Co., Ltd. | Divider plate for an inlet port, sand core for forming an inlet port, and cylinder head |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19960626A1 (de) | 1999-12-16 | 2001-06-21 | Fev Motorentech Gmbh | Kolbenbrennkraftmaschine mit unterteiltem Gaseinlaßkanal |
DE10036128A1 (de) * | 2000-07-25 | 2002-02-07 | Volkswagen Ag | Brennkraftmaschine und Verfahren zur aktiven Durchlüftung des Zylinderkurbelgehäuses derselben |
DE10108729B4 (de) * | 2001-02-23 | 2006-04-13 | Audi Ag | Zylinderkopf einer Brennkraftmaschine mit einem Strömungskanal |
DE10145876A1 (de) * | 2001-09-18 | 2003-04-10 | Daimler Chrysler Ag | Vorrichtung zur Herstellung eines Druckgussbauteils mit einem Kern und einem Einlegeteil |
DE10260041A1 (de) * | 2002-12-19 | 2004-07-15 | Volkswagen Ag | Trennblech für einen Gaswechselkanal einer Brennkraftmaschine und Verfahren zur Herstellung |
US6886516B2 (en) * | 2002-12-20 | 2005-05-03 | Nissan Motor Co., Ltd. | Cylinder head of internal combustion engine and method of producing same |
EP1450056B1 (de) | 2003-02-19 | 2017-06-07 | Nissan Motor Co., Ltd. | Hochfeste Pleuelstange und Verfahren zu ihrer Herstellung |
JP4172371B2 (ja) | 2003-10-20 | 2008-10-29 | 日産自動車株式会社 | シリンダヘッドの製造方法 |
JP4330423B2 (ja) * | 2003-10-20 | 2009-09-16 | 日産自動車株式会社 | 鋳造装置 |
EP1548263B1 (de) | 2003-10-20 | 2019-12-11 | Nissan Motor Co., Ltd. | Trennblech für einlasskanal und sandkern zur formung des einlasskanals und zylinderkopf |
JP4330422B2 (ja) | 2003-10-20 | 2009-09-16 | 日産自動車株式会社 | 鋳包み対象板部材、吸気ポート用の仕切り板、吸気ポート成形用砂中子およびシリンダヘッド |
JP2005120995A (ja) | 2003-10-20 | 2005-05-12 | Nissan Motor Co Ltd | 吸気ポート用の仕切り板、吸気ポート成形用砂中子およびシリンダヘッド |
DE102004002923B4 (de) * | 2004-01-20 | 2016-10-20 | Volkswagen Ag | Brennkraftmaschine mit Trennblech im Ansaugtrakt |
DE102004005324A1 (de) * | 2004-02-04 | 2005-08-25 | Daimlerchrysler Ag | Sandkern und Verfahren zur Herstellung desselben |
DE102006031532B3 (de) * | 2006-07-07 | 2008-04-17 | Emil Müller GmbH | Wasserlöslicher Salzkern mit Funktionsbauteil |
FR2921117A3 (fr) * | 2007-09-17 | 2009-03-20 | Renault Sas | Element de renfort de la structure mecanique d'une culasse de moteur thermique et culasse de moteur thermique comprenant un tel element de renfort |
FR2923011B1 (fr) * | 2007-10-29 | 2010-02-26 | Renault Sas | Dispositif de test de conduit d'admission pour vehicule automobile |
EP3428433B1 (de) * | 2016-03-09 | 2020-02-19 | Honda Motor Co., Ltd. | Verbrennungsmotoransaugstruktur |
WO2019009348A1 (ja) * | 2017-07-05 | 2019-01-10 | 本田技研工業株式会社 | 内燃機関の吸気構造 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2035939B1 (de) * | 1970-07-20 | 1972-02-03 | Kloeckner Humboldt Deutz Ag | Zylinderkopf für Brennkraftmaschinen |
US4543931A (en) * | 1982-12-29 | 1985-10-01 | Mazda Motor Corporation | Engine intake system |
JPS6250064A (ja) * | 1985-08-29 | 1987-03-04 | Mitsubishi Motors Corp | 可変スワ−ルポ−トの製造方法 |
DE3721021A1 (de) * | 1986-06-27 | 1988-01-21 | Aisin Seiki | Verfahren zur herstellung eines brennkraftmaschinenkolbens |
EP0899042A1 (de) * | 1997-08-13 | 1999-03-03 | Daimler-Benz Aktiengesellschaft | Verfahren zur Herstellung eines gegossenen Zylinderkopfes |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD81934A (de) * | ||||
AT278264B (de) * | 1968-03-13 | 1970-01-26 | Dueker Eisenwerk | Gießform zur Herstellung von Muffen oder Sicken aufweisenden Formstücken |
US4174686A (en) * | 1976-10-09 | 1979-11-20 | Toyo Kogyo Co., Ltd. | Intake system for internal combustion engines |
GB1567812A (en) * | 1976-10-09 | 1980-05-21 | Toyo Kogyo Co | Intake system for internal combustion engines |
SI8410444A8 (en) * | 1984-03-13 | 1996-02-29 | Tam Metalurgija | Combined kernel for casting cylinders of grey cast iron for air cooled internal combustion motors |
JPS61268849A (ja) * | 1985-05-24 | 1986-11-28 | Toyota Motor Corp | 内燃機関のシリンダヘツドの冷却水通路構造 |
JPH03283Y2 (de) * | 1986-07-24 | 1991-01-08 | ||
DE3707256C1 (en) * | 1987-03-06 | 1988-07-07 | Halbergerhuette Gmbh | Core for the casting of grey cast iron cylinder blocks |
US5197189A (en) * | 1990-09-06 | 1993-03-30 | Volkswagen Ag | Method of making a cylinder head with a port liner |
DE4130715C1 (en) * | 1991-09-14 | 1992-08-27 | Mtu Friedrichshafen Gmbh | Cast housing for IC engine exhaust lining - which is held loosely by support rings with axial and radial play between ends |
DE19517079A1 (de) * | 1995-05-10 | 1996-11-14 | Bayerische Motoren Werke Ag | Luftansaugvorrichtung für Brennkraftmaschinen |
DE19547490C1 (de) * | 1995-12-19 | 1997-01-23 | Daimler Benz Ag | Im Druckgußverfahren hergestellter Zylinderkopf einer flüssigkeitsgekühlten Brennkraftmaschine |
-
1998
- 1998-01-31 DE DE19803867A patent/DE19803867A1/de not_active Ceased
- 1998-11-12 DE DE59801670T patent/DE59801670D1/de not_active Expired - Lifetime
- 1998-11-12 EP EP98964397A patent/EP1051273B1/de not_active Expired - Lifetime
- 1998-11-12 JP JP2000529911A patent/JP2002501829A/ja not_active Withdrawn
- 1998-11-12 WO PCT/EP1998/007254 patent/WO1999038629A1/de not_active Application Discontinuation
- 1998-11-12 KR KR1020007008273A patent/KR20010034463A/ko not_active Application Discontinuation
- 1998-11-12 AT AT98964397T patent/ATE206337T1/de not_active IP Right Cessation
- 1998-11-12 ES ES98964397T patent/ES2165713T3/es not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2035939B1 (de) * | 1970-07-20 | 1972-02-03 | Kloeckner Humboldt Deutz Ag | Zylinderkopf für Brennkraftmaschinen |
US4543931A (en) * | 1982-12-29 | 1985-10-01 | Mazda Motor Corporation | Engine intake system |
JPS6250064A (ja) * | 1985-08-29 | 1987-03-04 | Mitsubishi Motors Corp | 可変スワ−ルポ−トの製造方法 |
DE3721021A1 (de) * | 1986-06-27 | 1988-01-21 | Aisin Seiki | Verfahren zur herstellung eines brennkraftmaschinenkolbens |
EP0899042A1 (de) * | 1997-08-13 | 1999-03-03 | Daimler-Benz Aktiengesellschaft | Verfahren zur Herstellung eines gegossenen Zylinderkopfes |
Non-Patent Citations (2)
Title |
---|
MAX F. HOMFELD: "Vehicle Emissions - Part II (Selected SAE Papers, 1963-1966", 1966, SOCIETY OF AUTOMOTIVE ENGINEERS, INC., NEW YORK, US, XP002098705 * |
PATENT ABSTRACTS OF JAPAN vol. 011, no. 238 (M - 613) 5 August 1987 (1987-08-05) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7198026B2 (en) | 2005-04-19 | 2007-04-03 | Nissan Motor Co., Ltd. | Divider plate for an inlet port, sand core for forming an inlet port, and cylinder head |
Also Published As
Publication number | Publication date |
---|---|
DE59801670D1 (de) | 2001-11-08 |
ES2165713T3 (es) | 2002-03-16 |
KR20010034463A (ko) | 2001-04-25 |
ATE206337T1 (de) | 2001-10-15 |
EP1051273A1 (de) | 2000-11-15 |
DE19803867A1 (de) | 1999-08-05 |
EP1051273B1 (de) | 2001-10-04 |
JP2002501829A (ja) | 2002-01-22 |
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