EP1305511B1 - Zylinderdeckeldichtung - Google Patents
Zylinderdeckeldichtung Download PDFInfo
- Publication number
- EP1305511B1 EP1305511B1 EP01955370A EP01955370A EP1305511B1 EP 1305511 B1 EP1305511 B1 EP 1305511B1 EP 01955370 A EP01955370 A EP 01955370A EP 01955370 A EP01955370 A EP 01955370A EP 1305511 B1 EP1305511 B1 EP 1305511B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- cylinder head
- liner
- gasket according
- cylinder liner
- 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
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
- F02F11/00—Arrangements of sealings in combustion engines
- F02F11/002—Arrangements of sealings in combustion engines involving cylinder heads
-
- 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
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
-
- 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
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B75/20—Multi-cylinder engines with cylinders all in one line
Definitions
- the invention relates to a cylinder cover gasket for a single or multi-cylinder internal combustion engine, in particular as a four-stroke diesel engine, each one Cylinder is associated with a separate cylinder cover, the sealing on a cylinder bore of the crankcase lined cylinder liner is to the cylinder cover with a bushing collar which ends on a corresponding paragraph of the Cylinder bore is seated and being between the front side Ring surface of the cylinder liner and the adjacent cylinder cover provided a ring seal is.
- a multi-cylinder four-stroke diesel engine with separate Cylinder covers is in the German patent specification Described 1965-2049.
- the cylinder cover is opposite the front-side annular surface of the cylinder liner vertically braced, being between cylinder cover and cylinder liner a metallic ring seal intended for water and gas sealing and wherein as an additional fuel gas seal two on Butt cut, twisted against each other sealing rings are inserted, the inner, to the combustion chamber borders.
- the present invention is the Task, a particularly safe and durable Ring seal between cylinder cover and bushing collar to create the cylinder liner to reach that water paths on the one hand and oil paths on the other are sealed against each other and that interference of fuel gases in these paths reliably fails. It should be additionally achieved that a suitable ring seal no particularly high axial Pressing requires so that unwanted stresses between the components adjacent to the ring seal be avoided.
- Two drainage channels are preferred per cylinder provided, one of which in the inlet channel, the another opens into the outlet channel.
- the drainage channels cause that due to the fuel gas pulsations occurring gas leakage in a short way in the inlet or outlet channel flow out before they to the Get ring seal and before there harmful Gas pressures can occur.
- the drainage channels act thus as immediate pressure relief in the area of annular gap closed by the ring seal.
- the application of the present invention is not limited to water-cooled engines; rather, it is also useful in air-cooled engines, where there lower demands on the type of ring seal given are.
- Unlike usual engine designs with a large cylinder head gasket, which covers a plurality of cylinder bores is according to the invention for each cylinder bore with associated Cylinder cover provided a separate ring seal.
- the invention is provided that the cylinder cover its inner front with one through one
- the recess formed neck projection ends which with slight interference fit in the associated interior of the Cylinder liner engages. It is sufficient in the generally a relatively small neck projection from about 4 to 6mm in height, depending on the cylinder diameter.
- an interference fit on Extent of the cylinder cover about H6 m6 in question.
- an effective represents radial seal
- can on ring seals which are under high axial pressures, largely dispensed with. Rather, it is enough, the Axial forces acting through the tie rod of the cylinder head attachment be exercised only to be measured that they are just above the occurring ignition forces.
- this annulus by an axial distance between cylinder cover and cylinder liner and / or a chamfer, groove or step of these components, which the inner circumferential edge of the cylinder liner is adjacent, be formed.
- the ring seal by an O-ring is formed, which in one of cylinder cover, Cylinder liner and cylinder bore limited Ring groove is received, such that it is on all sides is pressed within the annular groove.
- the annular groove is by a recess in the Cylinder cover and / or in the area of the outer peripheral edge the cylinder liner formed. It can be this also act around conical indentations, then prefers if such on the cylinder cover, another at the Cylinder sleeve is formed so that when moving together of these components between the recesses inserted O-ring strong against the cylinder bore is pressed where he has an effective barrier between Water and oil path on the inner circumference of the cylinder bore forms.
- an additional axial seal thereby realized be that cylinder liner and cylinder cover radially inside the annular groove for the O-ring in axial Directly adjacent to each other direction, such that a annular sealing and support surface is formed, the the surface pressure by the tie rods of the cylinder head attachment subject.
- This creates an axial Ring sealing surface in a practical embodiment has a radial width of about 1mm.
- a particularly long life of the O-ring can be achieve this as part of a combined Cylinder cover gasket is provided, namely in the way that cylinder liner and cylinder cover radially inward of the annular groove in the axial direction a metal sealing ring supported against each other which is the surface pressure of the tie rods subject to the cylinder head mounting.
- a sealing ring preferably made of copper, is a perfect gas barrier against the O-ring achievable.
- Such a metal sealing ring also has the Advantage that the axial distance between the cylinder cover and cylinder liner formed by the sealing ring which is the annulus into which the inner end of the Drainage channel opens, limited radially outward. In this case, the formation of grooves or chamfers is unnecessary on the adjacent components to create a such annulus.
- Such a sealing ring made of copper allows due its plastic deformability a limited Adjustment with regard to the positioning of the cylinder cover relative to the cylinder liner, so that the Combustion chamber adjusted in the correct position and thus a certain compression ratio can be ensured can.
- a comparable effect can be characterized achieve that between Buchsenbund and his Support serving paragraph of the cylinder bore axially deformable metal compensating ring is inserted.
- the cylinder cover made of an aluminum alloy and the cylinder liner after the Centrifuging method is made of gray cast iron.
- Such metal sealing rings can Similar to piston rings as slotted metal sleeves made of V2A steel of 0.2 to 0.3mm wall thickness be, with two such seals with in the circumferential direction staggered shocks can be provided. Also suitable are seals as undivided calibrated steel collars, with correspondingly lower Wall thickness, so that they through the compression and Ignition pressure each sealing in the appropriate Turning the cylinder liner and the cylinder cover be pressed.
- Fig. 1 shows within a cylinder bore 1 in Crankcase 6, the upper end of a cylinder liner 2, which ends with a widened bushing collar 3. This engages behind a paragraph 4 of the cylinder bore 1. Between the paragraph 4 and the Buchsenbund 3 is a Compensating ring 5 inserted through a hollow Brass ring (Fig. 2) is formed.
- a cylinder cover 7 is made of an aluminum alloy in the cylinder bore 1 with a slight interference fit H6 / m6 fitted in accordance with DIN 7157. As an intent he has one flat neck ledge 8, with which he enters the interior of Cylinder liner 2 engages. Between one front-side annular surface 9 (FIG. 2) of the bushing collar 3 and the cylinder cover 7 is in an annular groove 9 of the cylinder cover an O-ring 11. This is in the Ring groove 9 pressed so that it is on all sides of the from cylinder cover 7, cylinder liner 2 and Cylinder bore 1 formed walls abuts.
- Cylinder cover 7 is pierced by a drainage channel 12, on the one hand in the area of the inner edge of Cylinder liner 2, on the other hand in the inlet channel 13 in Inside the cylinder cover 7 opens.
- the opposite Drainage channel 14 opens instead in the Outlet channel 15.
- Fig. 1 in the region of the cylinder cover 7 is a cross section through a Cooling water channel 16 and the receiving bore 17 for a pump nozzle or a nozzle holder combination.
- the O-ring remains 11 spared from temperature stress, resulting in increased its service life accordingly. Further omitted a harmful gas inlet into the cooling water or in the oil circuit.
- the oil path according to arrow O is nourished through the oil circuit, through which the cylinder liner 2 with its outer circumference floating within the lower part of the cylinder bore 1 is mounted. There the compensation ring 5 no increased sealing effect arrives, oil from the lubricating oil circuit arrives at Compensating ring 5 over between the outer circumference of the Bushing collar 3 and the cylinder bore 1.
- FIGS. 4 to 6 each show designed as an O-ring 11 ring seal, which like all other variants with a round cord seal 20 is combined.
- a metal sealing ring 25 as an axial seal between cylinder cover 7 and cylinder liner 2.
- the Metal sealing ring 25 is preferably made of a deformable metal such as copper, so that he himself especially good on the adjacent sealing surfaces snuggles and also a limited axial adjustment between cylinder cover 7 and cylinder liner 2 for the purpose of meeting the clearance criteria for the combustion chamber allows.
- the cylinder cover 2 has below one between the sealing ring 25, cylinder cover 7 and Cylinder liner 2 formed annular space 26, in which the drainage channel 12 opens a chamfer 27, the with the cylinder liner 2 in cross section triangular-shaped circumferential cavity that forms with a compressed metal braid 28 or a matching Form ring, z. B. made of copper, filled gas-tight.
- This compression is done in such a way that a ring with in the pressed state rectangular ring cross-section made of metal mesh when retracting the cylinder cover 7 in the cylinder bore accordingly is compressed.
- FIG. 6 In the variant of Figure 6 is a to the combustion chamber 19 adjacent metal sealing ring 29, which the impact between cylinder cover 7 and cylinder liner 2 bridged, within a recess 30 at the inside of the cylinder liner 2 is arranged.
- Sealing ring 29 consists of either one calibrated V2A steel ring or he is out of at least composed of two open thin-walled steel rings, which offset with their butt joints in the circumferential direction are arranged.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Gasket Seals (AREA)
Description
- Fig. 1
- einen Querschnitt durch das obere Ende eines Zylinders und durch den Zylinderdeckel,
- Fig. 2
- einen vergrößerten Ausschnitt gemäß II der Fig. 1 und
- Fig. 3 bis 6
- jeweils einen Ausschnitt gemäß Fig. 2 mit vier verschiedenen Varianten dazu.
Claims (13)
- Zylinderdeckeldichtung für Ein- oder Mehrzylinder-Brennkraftmaschine, insbesondere als Viertakt-Dieselmotor, wobei jedem Zylinder ein separater Zylinderdeckel (7) zugeordnet ist, der dichtend auf eine die Zylinderbohrung (1) des Kurbelgehäuses (6) auskleidende Zylinderlaufbuchse (2) aufgesetzt ist, die zum Zylinderdeckel (7) hin mit einem Buchsenbund (3) endet, welcher auf einem entsprechenden Absatz (4) der Zylinderbohrung (1) aufsitzt und wobei zwischen der stirnseitigen Ringfläche (9) der Zylinderlaufbuchse (2) und dem angrenzenden Zylinderdeckel (7) eine Ringdichtung (11) vorgesehen ist,
dadurch gekennzeichnet, daß im Zylinderdeckel (7) ein Drainagekanal (12, 14) vorgesehen ist, der mit einem Ende radial innerhalb der Ringdichtung (11) im Bereich des Innenrands der Zylinderlaufbuchse (2) mündet und dessen anderes Ende mit dem Ein (13)- oder Auslaßkanal (15) im Zylinderdeckel (7) verbunden ist. - Zylinderdeckeldichtung nach Anspruch 1,
dadurch gekennzeichnet, daß je Zylinder zwei Drainagekanäle (12, 14) vorgesehen sind, von denen einer in den Einlaßkanal (13), der andere in den Auslaßkanal (15) mündet. - Zylinderdeckeldichtung nach Anspruch 1,
dadurch gekennzeichnet, daß der Zylinderdeckel (7) an seiner inneren Stirnseite mit einem durch eine Eindrehung gebildeten Halsvorsprung (8) endet, welcher mit leichtem Preßsitz in den zugeordneten Innenrand der Zylinderlaufbuchse (2) eingreift. - Zylinderdeckeldichtung nach Anspruch 1,
dadurch gekennzeichnet, daß das innere Ende des Drainagekanals (12, 14) in einen Ringraum (26) mündet, der an die zugeordnete innere Umlaufkante der Zylinderlaufbuchse (2) angrenzt. - Zylinderdeckeldichtung nach Anspruch 4,
dadurch gekennzeichnet, daß der Ringraum (26) durch einen axialen Abstand zwischen Zylinderdeckel (7) und Zylinderlaufbuchse (2) und/oder eine Fase, Nut oder Stufe dieser Bauteile, welche an die innere Umlaufkante der Zylinderlaufbuchse (2) angrenzt, gebildet ist. - Zylinderdeckeldichtung nach Anspruch 1,
dadurch gekennzeichnet, daß die Ringdichtung durch einen O-Ring (11) gebildet ist, welcher in einer von Zylinderdeckel (7), Zylinderlaufbuchse (2) und Zylinderbohrung (1) begrenzten Ringnut (9) aufgenommen ist, derart, daß er allseitig innerhalb der Ringnut (9) angepreßt ist. - Zylinderdeckeldichtung nach Anspruch 1,
dadurch gekennzeichnet, daß die Ringnut (9) durch eine Eindrehung im Zylinderdeckel (7) und/oder im Bereich der äußeren Umlaufkante der Zylinderlaufbuchse (2) gebildet ist. - Zylinderdeckeldichtung nach Anspruch 7,
dadurch gekennzeichnet, daß Zylinderlaufbuchse (2) und Zylinderdeckel (7) radial innerhalb der Ringnut (9) in axialer Richtung direkt aneinander angrenzen, derart, daß eine ringförmige Dicht- u. Stützfläche gebildet ist, die der Flächenpressung durch die Zuganker der Zylinderkopfbefestigung unterliegt. - Zylinderdeckeldichtung nach Anspruch 7,
dadurch gekennzeichnet, daß Zylinderlaufbuchse (2) und Zylinderdeckel (7) radial innerhalb der Ringnut (9) in axialer Richtung über einen metallenen Dichtring (25) gegeneinander abgestützt sind, welcher der Flächenpressung durch die Zuganker der Zylinderkopfbefestigung unterliegt. - Zylinderdeckeldichtung nach den Ansprüchen 5 und 9,
dadurch gekennzeichnet, daß der axiale Abstand zwischen Zylinderdeckel (7) und Zylinderlaufbuchse (2) durch den Dichtring (25) gebildet ist, welcher den Ringraum (26) in den das innere Ende des Drainagekanals (12, 14) mündet, radial nach außen begrenzt. - Zylinderdeckeldichtung nach Anspruch 1,
dadurch gekennzeichnet, daß zwischen Buchsenbund (3) und dem seiner Abstützung dienenden Absatz (4) der Zylinderbohrung (1) ein axial begrenzt verformbarer metallener Ausgleichsring (5) eingefügt ist. - Zylinderdeckeldichtung nach Anspruch 1,
dadurch gekennzeichnet, daß der Zylinderdeckel (7) aus einer Aluminiumlegierung und die Zylinderlaufbuchse (2) nach dem Schleuderverfahren aus Grauguß hergestellt sind. - Zylinderdeckeldichtung nach Anspruch 1,
dadurch gekennzeichnet, daß wenigstens ein an den Brennraum (19) angrenzender metallener Dichtring (29), welcher den Stoß zwischen Zylinderdeckel (7) und Zylinderlaufbuchse (2) überbrückt, innerhalb einer flachen Eindrehung (30) an der Innenseite der Zylinderlaufbuchse (2) und des Zylinderdeckels (7) angeordnet ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10037748A DE10037748C1 (de) | 2000-08-02 | 2000-08-02 | Zylinderdeckeldichtung |
DE10037748 | 2000-08-02 | ||
PCT/EP2001/008590 WO2002010572A1 (de) | 2000-08-02 | 2001-07-25 | Zylinderdeckeldichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1305511A1 EP1305511A1 (de) | 2003-05-02 |
EP1305511B1 true EP1305511B1 (de) | 2005-10-12 |
Family
ID=7651130
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01955370A Expired - Lifetime EP1305511B1 (de) | 2000-08-02 | 2001-07-25 | Zylinderdeckeldichtung |
Country Status (5)
Country | Link |
---|---|
US (1) | US6584947B2 (de) |
EP (1) | EP1305511B1 (de) |
JP (1) | JP2004505196A (de) |
DE (2) | DE10037748C1 (de) |
WO (1) | WO2002010572A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE525322C2 (sv) * | 2003-06-04 | 2005-02-01 | Volvo Lastvagnar Ab | Tätningsförband vid en förbränningsmotor |
DE102004032904B4 (de) * | 2004-07-07 | 2006-06-14 | Motorenfabrik Hatz Gmbh & Co Kg | Dichtungssystem für eine Brennkraftmaschine mit geteiltem Gussgehäuse |
DE102006004205B3 (de) * | 2006-01-25 | 2007-06-06 | Motorenfabrik Hatz Gmbh & Co Kg | Ein- oder Mehrzylinder-Brennkraftmaschine mit geteiltem Gußgehäuse |
CN102536505A (zh) * | 2010-12-31 | 2012-07-04 | 中国兵器工业集团第七○研究所 | 一种单体气缸盖整体气门室罩密封机构 |
JP2016211396A (ja) * | 2015-04-30 | 2016-12-15 | トヨタ自動車株式会社 | 内燃機関 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3853099A (en) * | 1972-12-21 | 1974-12-10 | Caterpillar Tractor Co | Elastomeric sealing ring for cylinder liners |
DE2621348C2 (de) | 1976-05-14 | 1984-05-30 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg | Zylinder mit trockener dünnwandiger Zylinderlaufbuchse für Brennkraftmaschinen |
US4280456A (en) | 1979-10-26 | 1981-07-28 | General Motors Corporation | Engine with intake ported cylinders and porous port liners for oil control |
JP3303018B2 (ja) | 1993-09-06 | 2002-07-15 | 三信工業株式会社 | 水冷エンジンのシリンダヘッドシール構造 |
US5414993A (en) * | 1993-12-22 | 1995-05-16 | Caterpillar Inc. | Exhaust port liner and seal assembly |
US5577472A (en) * | 1995-06-07 | 1996-11-26 | Cummins Engine Company, Inc. | Spring-energized cylinder head combustion seal assembly |
DE19652049C1 (de) * | 1996-12-13 | 1998-07-02 | Hatz Motoren | Brennkraftmaschine und Verfahren zu deren Herstellung |
US5970941A (en) * | 1998-06-16 | 1999-10-26 | Caterpillar Inc. | Cylinder liner connecting arrangement and method |
-
2000
- 2000-08-02 DE DE10037748A patent/DE10037748C1/de not_active Expired - Fee Related
-
2001
- 2001-07-25 WO PCT/EP2001/008590 patent/WO2002010572A1/de active IP Right Grant
- 2001-07-25 EP EP01955370A patent/EP1305511B1/de not_active Expired - Lifetime
- 2001-07-25 US US10/089,582 patent/US6584947B2/en not_active Expired - Fee Related
- 2001-07-25 DE DE50107702T patent/DE50107702D1/de not_active Expired - Fee Related
- 2001-07-25 JP JP2002516467A patent/JP2004505196A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
EP1305511A1 (de) | 2003-05-02 |
WO2002010572A1 (de) | 2002-02-07 |
JP2004505196A (ja) | 2004-02-19 |
US6584947B2 (en) | 2003-07-01 |
US20020148429A1 (en) | 2002-10-17 |
DE50107702D1 (de) | 2005-11-17 |
DE10037748C1 (de) | 2001-11-15 |
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