EP1305511A1 - Joint de couvercle de cylindre - Google Patents

Joint de couvercle de cylindre

Info

Publication number
EP1305511A1
EP1305511A1 EP01955370A EP01955370A EP1305511A1 EP 1305511 A1 EP1305511 A1 EP 1305511A1 EP 01955370 A EP01955370 A EP 01955370A EP 01955370 A EP01955370 A EP 01955370A EP 1305511 A1 EP1305511 A1 EP 1305511A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
cylinder cover
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.)
Granted
Application number
EP01955370A
Other languages
German (de)
English (en)
Other versions
EP1305511B1 (fr
Inventor
Günter Kampichler
Stefan JÄGER
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.)
Motorenfabrik Hatz GmbH and Co KG
Original Assignee
Motorenfabrik Hatz GmbH and Co KG
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 Motorenfabrik Hatz GmbH and Co KG filed Critical Motorenfabrik Hatz GmbH and Co KG
Publication of EP1305511A1 publication Critical patent/EP1305511A1/fr
Application granted granted Critical
Publication of EP1305511B1 publication Critical patent/EP1305511B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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 cylinder being assigned a separate cylinder cover, which is sealingly placed on a cylinder liner lining the cylinder bore of the crankcase, which ends with a sleeve collar towards the cylinder cover , which sits on a corresponding shoulder of the cylinder bore and wherein an annular seal is provided between the end face of the cylinder liner and the adjacent cylinder cover.
  • a multi-cylinder four-stroke diesel engine with separate cylinder covers is described in German patent 19652049.
  • the cylinder receiving bores in the crankcase are lined with liners, which have a liner collar on the cover side. This sleeve collar sits on a shoulder of the cylinder bore.
  • the cylinder cover is braced vertically in relation to the end ring surface of the cylinder liner, a metallic ring seal for water and gas sealing being provided between the cylinder cover and the cylinder liner, and two additional rings cut against one another and twisted against one another, the inner of which adjoins the combustion chamber, are inserted as an additional fuel gas seal ,
  • the present invention has for its object to provide a particularly safe and permanent ring seal between the cylinder cover and sleeve collar of the cylinder liner to achieve that water paths on the one hand and oil paths on the other hand are sealed against each other and that mixing of fuel gases in these paths is reliably avoided. It should also be achieved that a suitable ring seal does not require a particularly high axial pressure, so that undesirable stresses between the components adjacent to the ring seal are avoided.
  • a drainage channel is provided in the cylinder cover which has one end radially inside the ring seal in the region of the inner edge of the cylinder liner opens and the other end is connected to the inlet or exhaust port in the cylinder cover.
  • Two drainage channels are preferably provided per cylinder, one of which opens into the inlet channel, the other opens into the outlet channel.
  • the drainage channels ensure that gas leaks that occur as a result of the fuel gas pulsations flow into the inlet or outlet channel over a short distance before they reach the ring seal and before harmful gas pressures can occur there.
  • the drainage channels thus act as direct pressure relief in the area of the annular gap closed by the ring seal. As a result of the direct discharge of gas leaks through the drainage holes, there is reliable gas tightness with respect to the water and oil spaces of the engine.
  • the application of the present invention is not limited to water-cooled engines; rather, it also makes sense for air-cooled engines, where there are lower requirements for the type of ring seal.
  • a separate ring gasket is provided according to the invention for each cylinder bore with an associated cylinder cover.
  • the cylinder cover ends on its inner end face with a neck projection formed by a recess, which protrudes with light press fit engages in the associated interior of the cylinder liner.
  • a relatively small neck protrusion of approximately 4 to 6 mm in height is generally sufficient, depending on the cylinder diameter.
  • a press fit on the circumference of the cylinder cover of approximately H6 m6 is possible as a light press fit. Because such a press fit constitutes an effective radial seal, ring seals which are under high axial pressures can largely be dispensed with. Rather, it is sufficient to dimension the axial forces which are exerted via the tie rods of the cylinder head fastening in such a way that they are just above the ignition forces which occur.
  • the inner end of the respective drainage channel opens into an annular space which adjoins the assigned inner circumferential edge of the cylinder liner.
  • This annular space can be formed by an axial distance between the cylinder cover and the cylinder liner and / or a chamfer, groove or step of these components which adjoins the inner circumferential edge of the cylinder liner.
  • the ring seal is formed by an O-ring which is located in one of the cylinder covers, Cylinder liner and cylinder bore limited annular groove is added such that it is pressed on all sides within the annular groove.
  • the annular groove is formed by a turn in the cylinder cover and / or in the area of the outer circumferential edge of the cylinder liner.
  • These can also be conical indentations, preferably if one is formed on the cylinder cover, another on the cylinder liner, so that when these components move together, an O-ring inserted between the indentations is pressed firmly against the cylinder bore, where it forms an effective barrier between the water and oil path on the inner circumference of the cylinder bore.
  • an additional axial seal can be realized according to the invention in that the cylinder liner and cylinder cover are radially adjacent to one another in the axial direction radially within the annular groove for the O-ring, in such a way that an annular sealing and support surface is formed, which corresponds to the surface pressure caused by the Tie rod of the cylinder head fastening is subject.
  • This creates an axial ring sealing surface which, in a practical embodiment, has a radial width of approximately 1 mm.
  • the cylinder cover is made of an aluminum alloy and the cylinder liner is made of gray cast iron by the centrifugal process. These materials ensure that gas tightness is improved significantly with increasing operating temperature due to the higher thermal expansion of the cylinder cover compared to the cylinder liner in accordance with the increasing pressure between these components during operation. Certain gas leaks can only be accepted when the engine is cold started, but these usually do not play a role, since they only reach fractions of a normal blow-by value on the piston rings.
  • metal sealing rings adjacent to the combustion chamber, which bridges the joint between the cylinder cover and cylinder liner, within a shallow recess on the inside of the cylinder liner is arranged.
  • Such metal sealing rings can be designed similarly to piston rings as slotted metal sleeves made of V2A steel with a wall thickness of 0.2 to 0.3 mm, it being possible for two such sealing rings to be provided with joints offset in the circumferential direction. Sealing rings are also suitable as undivided, calibrated steel sleeves with a correspondingly small wall thickness, so that they are compressed and The ignition pressure is pressed in a sealing manner into the corresponding recess in the cylinder liner and the cylinder cover.
  • FIG. 1 shows a cross section through the upper end of a cylinder and through the cylinder cover
  • Fig. 2 is an enlarged section according to II of Fig. 1 and
  • FIG. 3 to 6 each show a section according to FIG. 2 with four different variants.
  • Fig. 1 shows within a cylinder bore 1 in the crankcase 6, the upper end of a cylinder liner 2, which ends with a widened sleeve collar 3. This engages behind a shoulder 4 of the cylinder bore 1. Between the shoulder 4 and the sleeve collar 3, a compensating ring 5 is inserted, which is formed by a hollow brass ring (Fig. 2).
  • a cylinder cover 7 made of an aluminum alloy is fitted into the cylinder bore 1 with a slight press fit H6 / m6 in accordance with DIN 7157. As an attachment, it has a flat neck projection 8, with which it engages in the interior of the cylinder liner 2. Between an end ring surface 9 (Fig. 2) of the sleeve collar 3 and the cylinder cover 7 there is an O-ring 11 in an annular groove 9 of the cylinder cover. This is pressed into the annular groove 9 in such a way that it is on all sides of the cylinder cover 7, cylinder liner 2 and cylinder bore 1 formed walls.
  • the O-ring 11 is pressed into the annular groove 9 in such a way that it is on all sides of the cylinder cover 7, cylinder liner 2 and cylinder bore 1 formed walls.
  • bushing 2 is mounted with its outer circumference floating within the lower part of the cylinder bore 1. Since the compensating ring 5 has no increased sealing effect, oil from the lubricating oil circuit passes the compensating ring 5 between the outer circumference of the bush collar 3 and the cylinder bore 1.
  • the O-ring 11 is pressed triangularly between corresponding oblique screw-in of the cylinder cover 7 on the one hand and the sleeve collar 3 on the other hand.
  • a round cord seal 20 is accommodated, which seals the water path according to arrow W and the oil path according to arrow O in the region of the parting line, which is represented by a dashed check pattern.
  • the cylinder liner 2 is secured against rotation by a grub screw 21, which engages with a calibrated inner end 22 in a corresponding recess 23 of the sleeve collar 3.
  • a valve seat ring (24) can be seen on the left next to the drainage channel 12.
  • FIGS. 4 to 6 each show an annular seal designed as an O-ring 11 which, like all other variants, is combined with a round cord seal 20.
  • these figures show a metal sealing ring 25 as an axial seal between the cylinder cover 7 and the cylinder liner 2.
  • the metal sealing ring 25 is preferably made of a deformable metal such as copper, so that it conforms particularly well to the adjacent sealing surfaces and also a limited axial adjustment between the cylinder cover 7 and cylinder liner 2 enabled to meet the gap dimension criteria for the combustion chamber.
  • the cylinder cover 2 has below an annular space 26 formed between the sealing ring 25, the cylinder cover 7 and the cylinder liner 2, in which the drainage channel 12 opens a chamfer 27 which, with the cylinder liner 2, forms a circumferential cavity which is triangular in cross section and which is pressed together with a Metal braid 28 or a matching shaped ring, e.g. B. made of copper, filled gas-tight.
  • This pressing takes place in such a way that a ring with a ring cross-section made of metal mesh which is rectangular in the uncompressed state is correspondingly compressed when the cylinder cover 7 is inserted into the cylinder bore.
  • the sealing ring 29 either consists of a calibrated V2A steel ring or it is composed of at least two open thin-walled steel rings, which are offset with their butt joints in order angsraum.

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)

Abstract

Dans un moteur à combustion interne monocylindre ou multicylindre, le couvercle de cylindre (7) comporte un canal de drainage (12, 14) dont une extrémité aboutit radialement dans le joint annulaire au niveau du bord intérieur de la chemise de cylindre (2), et l'autre extrémité est reliée au canal d'admission (13) ou au canal de sortie (15) dans le couvercle de cylindre (7).
EP01955370A 2000-08-02 2001-07-25 Joint de couvercle de cylindre Expired - Lifetime EP1305511B1 (fr)

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 (fr) 2000-08-02 2001-07-25 Joint de couvercle de cylindre

Publications (2)

Publication Number Publication Date
EP1305511A1 true EP1305511A1 (fr) 2003-05-02
EP1305511B1 EP1305511B1 (fr) 2005-10-12

Family

ID=7651130

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01955370A Expired - Lifetime EP1305511B1 (fr) 2000-08-02 2001-07-25 Joint de couvercle de cylindre

Country Status (5)

Country Link
US (1) US6584947B2 (fr)
EP (1) EP1305511B1 (fr)
JP (1) JP2004505196A (fr)
DE (2) DE10037748C1 (fr)
WO (1) WO2002010572A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0210572A1 *

Also Published As

Publication number Publication date
DE10037748C1 (de) 2001-11-15
US20020148429A1 (en) 2002-10-17
DE50107702D1 (de) 2005-11-17
JP2004505196A (ja) 2004-02-19
US6584947B2 (en) 2003-07-01
WO2002010572A1 (fr) 2002-02-07
EP1305511B1 (fr) 2005-10-12

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