EP0152763B1 - Buchsdichtung zum Trennen eines zylindrischen Körpers von einer ihn aufnehmenden Bohrung - Google Patents

Buchsdichtung zum Trennen eines zylindrischen Körpers von einer ihn aufnehmenden Bohrung Download PDF

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Publication number
EP0152763B1
EP0152763B1 EP85100419A EP85100419A EP0152763B1 EP 0152763 B1 EP0152763 B1 EP 0152763B1 EP 85100419 A EP85100419 A EP 85100419A EP 85100419 A EP85100419 A EP 85100419A EP 0152763 B1 EP0152763 B1 EP 0152763B1
Authority
EP
European Patent Office
Prior art keywords
seal
bore
injection nozzle
cylindrical body
fuel injection
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
Application number
EP85100419A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0152763A1 (de
Inventor
Herbert Joseph Hauser, Jr.
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.)
Deere and Co
Original Assignee
Deere and Co
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 Deere and Co filed Critical Deere and Co
Priority to AT85100419T priority Critical patent/ATE29557T1/de
Publication of EP0152763A1 publication Critical patent/EP0152763A1/de
Application granted granted Critical
Publication of EP0152763B1 publication Critical patent/EP0152763B1/de
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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/167—Means for compensating clearance or thermal expansion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/858—Mounting of fuel injection apparatus sealing arrangements between injector and engine

Definitions

  • the invention relates to a bushing seal for separating a cylindrical body from a bore with an upper and a lower end, the upper end abutting against the cylindrical body in a region outside the bore, the lower end also abutting the cylindrical body, is bevelled on the outer circumference and is located between the bore and the cylindrical body.
  • Such bush seals can be used in many areas.
  • a preferred area of application is that of internal combustion engines, where it is necessary to prevent the high-temperature gases generated in the cylinder bore during the working cycles from sweeping past the lower part of the injection nozzle to its upper region, causing heat and charring problems there.
  • the bush seal (US-A-4201 172) from which the invention is based is also intended to solve this problem.
  • the gasket is designed such that it surrounds a part of the injection nozzle and at its upper end it runs out into an annular flange which is pressed onto the cylinder head via a cover.
  • an annular groove is incorporated into the nozzle body with the smaller diameter, in which the bushing seal is inserted. In this way, the bushing seal is fixed in the injection nozzle and is intended to have a heat-insulating effect, which is why it can be made of heat-resistant rubber.
  • the shape of the bush seal determines the depth of use of the nozzle, and due to the compression of the ring flange, stresses can occur in this area during relative movements between the nozzle and the cylinder head, which lead to premature signs of fatigue, which reduces the effectiveness of the seal and gases from the cylinder bush on the Can exit nozzle.
  • the object to be achieved with the invention is seen in the fact that the ends of the bush seal can be moved axially relative to one another and from one another.
  • the seal between its upper end and the beginning of the bevel has the same wall thickness and in this area forms a bellows-shaped part which is at a distance from the cylindrical body and is located outside the bore and which, at least at the beginning of the bevel, has a larger diameter than the bore, and that the seal lies with the outer circumference in the region of its lower end on the wall of the bore.
  • the seal can easily adapt to different depths of use of the cylindrical body and relative movements between the body and the bore, since the bellows-shaped part allows it to be pushed together and pulled apart and the choice of diameter at the beginning of the bevel ensures that the seal between the body and the bore is held securely.
  • the bush seal can advantageously be arranged on a cylindrical body which is designed as a nozzle with different outside diameters, so that a radial shoulder is formed, against which the upper end of the seal rests.
  • the bellows-shaped part can expediently be provided approximately centrally between the upper and lower ends of the seal, the bellows-shaped part being semicircular in cross section.
  • an internal combustion engine 10 is shown in extracts.
  • Your engine block is 12
  • an associated cylinder bore is 14
  • a cylinder head which is fastened in the usual way on the engine block 12 and closes the cylinder bore 14 at one end, is designated 16.
  • a stepped through hole 18 is incorporated, which consists in detail of a bore 20 with a smaller diameter, which opens into the cylinder bore 14, and a bore 22 with a larger diameter, which is located away from the cylinder bore 14.
  • An injection nozzle 24 is inserted in the through hole 18 and screwed to the cylinder head 14 via a thread 26.
  • the thread 26 makes it possible for the injection nozzle 24 to be axially adjustable. Of course, other adjusting means can be used instead of the thread 26.
  • the injection nozzle 24 is also of a stepped design and accordingly consists of a cylindrical body 30 with a smaller diameter than a further section 32 with a larger circumference. At the transition from the smaller body 30 to the section 32, a shoulder 28 is formed and the body 30 has a diameter that is a few thousandths smaller than the diameter of the bore 20.
  • gases result from the combustion in the cylinder bore 14, which tend to flow upward through the bore 20 into the bore 22, which is harmful since this causes the injector 24 to heat up and Charring problems can occur.
  • gases flow into the bore 22 with the larger diameter, a dead volume of air is present, which creates a so-called accounting effect for subsequent work cycles.
  • the combined effect of the heated injection nozzle 24, the quenching of the dead air volume and the carbonization deteriorates the efficiency of the internal combustion engine 10 and increases the emissivity.
  • a bushing seal 34 is used. It can best be seen in FIGS. 2 and 3 and has the shape of a hollow sleeve-shaped ring 36 which encircles the cylindrical body 30 of the injection nozzle 24 and lies against it.
  • the ring 36 has a flat upper end 38 that abuts the shoulder 28 and a tapered or tapered lower end 40 that at least partially abuts the inner wall of the bore 20 with the smaller diameter.
  • the bevel is provided on the outside of the ring with a maximum outer diameter that is slightly larger than the diameter of the bore 20.
  • the smallest diameter of the bevel is slightly smaller than the inner diameter of the bore.
  • the bevel can be of different angle sizes. In the preferred embodiment, the angle can be 10 to 45 °, preferably 30 ° measured from the outer surface of the ring 36.
  • the bushing seal 34 is also provided with an outwardly projecting bellows-shaped part 42, which in principle can be provided anywhere between the upper and lower ends 38 and 40, approximately midway between the ends or preferably midway between the upper end and the beginning 44 of the Bevel.
  • the bellows-shaped part 42 is compressible and extendable and thus enables the two ends 38 and 40 to move axially relative to one another when the injection nozzle 24 is inserted into the cylinder head 16 or during thermal expansion which occurs during normal operation of the Internal combustion engine occurs.
  • a bushing seal 34 with a total height of 6 mm should be able to be compressed by a maximum of 2.5 mm.
  • the bush seal should have a constant wall thickness over its entire length, that is between the upper end and the beginning 44 of the bevel. This also allows a simple and economical way of producing the bush seal. 2 that the cross section of the bellows-shaped part 42 is semicircular. Although the semicircular configuration is easy to manufacture, other cross-sectional shapes can of course also be used.
  • bushing 34 permits these dimensional changes because it is compressible when the injector moves down towards the cylinder bore 14 and is extensible to its normal length when the injector returns to its original position. Under normal operating conditions, the bushing seal will prevent the gases from entering the bore 22 with the larger diameter of the through bore 18.
  • the bushing seal is made of a metallic material, it can act as a heat seal by preventing gases from entering the dead space in the bore 22.
  • the metallic material can also be replaced by heat-resistant rubber or plastic. The only decisive factor is that the material withstands the normal temperature range of the internal combustion engine, which is between 300 ° to 600 ° Farenheit (149 ° to 316 ° C).
  • the application of the bush seal is not limited to the use in internal combustion engines. It can be used wherever similar conditions occur with parts moving against each other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Gasket Seals (AREA)
  • Glass Compositions (AREA)
  • Sealing Devices (AREA)
  • Sealing Material Composition (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
EP85100419A 1984-01-23 1985-01-17 Buchsdichtung zum Trennen eines zylindrischen Körpers von einer ihn aufnehmenden Bohrung Expired EP0152763B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85100419T ATE29557T1 (de) 1984-01-23 1985-01-17 Buchsdichtung zum trennen eines zylindrischen koerpers von einer ihn aufnehmenden bohrung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/573,236 US4528959A (en) 1984-01-23 1984-01-23 Seal for an internal combustion engine
US573236 1984-01-23

Publications (2)

Publication Number Publication Date
EP0152763A1 EP0152763A1 (de) 1985-08-28
EP0152763B1 true EP0152763B1 (de) 1987-09-09

Family

ID=24291175

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85100419A Expired EP0152763B1 (de) 1984-01-23 1985-01-17 Buchsdichtung zum Trennen eines zylindrischen Körpers von einer ihn aufnehmenden Bohrung

Country Status (10)

Country Link
US (1) US4528959A (pt)
EP (1) EP0152763B1 (pt)
JP (1) JPS60159365A (pt)
AT (1) ATE29557T1 (pt)
AU (1) AU562899B2 (pt)
BR (1) BR8500236A (pt)
CA (1) CA1221886A (pt)
DE (1) DE3560602D1 (pt)
ES (1) ES292800Y (pt)
ZA (1) ZA85495B (pt)

Families Citing this family (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69018807T2 (de) * 1990-02-07 1995-08-17 Cooper Ind Inc Ringförmige Dichtung.
US5247918A (en) * 1992-09-17 1993-09-28 Siemens Automotive L.P. Sealing a direct injection fuel injector to a combustion chamber
DE4240514A1 (de) * 1992-12-02 1994-06-09 Kloeckner Humboldt Deutz Ag Einspritzventil mit verliersicherer Dichtscheibe
US5487368A (en) * 1994-07-29 1996-01-30 Caterpillar Inc. Combustion gas seal assembly adapted for a fuel injector
US5706786A (en) * 1994-12-28 1998-01-13 Cummins Engine Company, Inc. Distortion reducing load ring for a fuel injector
US5503128A (en) * 1994-12-28 1996-04-02 Cummins Engine Company, Inc. Distortion control ring for a fuel injector
US5697345A (en) * 1994-12-28 1997-12-16 Cummins Engine Company, Inc. Clamping load distributor for a fuel injector
JPH08200182A (ja) * 1995-01-25 1996-08-06 Zexel Corp 電磁式燃料噴射弁およびその取付け構造
US5566658A (en) * 1995-04-21 1996-10-22 Cummins Engine Company, Inc. Clamping load distributor and top stop for a fuel injector
US5577472A (en) * 1995-06-07 1996-11-26 Cummins Engine Company, Inc. Spring-energized cylinder head combustion seal assembly
JP3329998B2 (ja) * 1995-10-17 2002-09-30 三菱電機株式会社 筒内噴射用燃料噴射弁
JP3033499B2 (ja) * 1996-08-22 2000-04-17 三菱自動車工業株式会社 シリンダヘッドのシール装置
FR2762051B1 (fr) * 1997-04-10 1999-05-21 Peugeot Dispositif de fixation d'un injecteur de carburant sur une culasse de moteur a combustion interne
US5752487A (en) * 1997-06-11 1998-05-19 Caterpillar Inc. Injector combustion gas seal
US5897058A (en) * 1997-09-25 1999-04-27 Caterpillar Inc. High pressure metal to metal sealing land in a control valve for a fuel injector
DE19808068A1 (de) * 1998-02-26 1999-09-02 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19834475A1 (de) * 1998-07-31 2000-02-03 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19838748B4 (de) * 1998-08-26 2008-06-19 Daimler Ag Auf den Brennraum einer Brennkraftmaschine einspritzende Kraftstoffeinspritzdüse
US6289876B1 (en) * 1999-03-29 2001-09-18 International Truck And Engine Corporation Fuel injector
DE19932762A1 (de) * 1999-07-14 2001-01-18 Bosch Gmbh Robert Verfahren zur Einstellung des Ventilhubs eines Einspritzventils
DE19941930A1 (de) * 1999-09-03 2001-03-15 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
US6314943B1 (en) * 1999-10-22 2001-11-13 Ford Global Technologies, Inc. Fuel supply rail with integrated fuel injector load spring
DE19962968A1 (de) 1999-12-24 2001-06-28 Bosch Gmbh Robert Ausgleichselement
DE50110145D1 (de) * 2001-01-12 2006-07-27 Ford Global Tech Inc Geraeuschreduzierende Anordnung von Unterlegscheiben unter einer Einspritzduese
DE10108194A1 (de) * 2001-02-21 2002-08-29 Bosch Gmbh Robert Dichtvorrichtung für ein Brennstoffeinspritzventil
DE10109407A1 (de) * 2001-02-28 2002-09-05 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10112142A1 (de) * 2001-03-14 2002-09-19 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10142299A1 (de) * 2001-08-29 2003-04-17 Bosch Gmbh Robert Brennstoffeinspritzsystem
US6659371B2 (en) * 2001-10-26 2003-12-09 Senior Investments Ag Fuel injector seal construction and method of manufacture
US6866026B2 (en) * 2002-08-28 2005-03-15 Federal-Mogul World Wide, Inc. Gasket for fuel injector
US6640784B1 (en) 2002-10-09 2003-11-04 Robert Bosch Corporation Spark ignition direct injection system
JP4089577B2 (ja) * 2003-09-25 2008-05-28 トヨタ自動車株式会社 筒内噴射用インジェクタ
DE102005006818A1 (de) * 2005-02-15 2006-08-17 Volkswagen Mechatronic Gmbh & Co. Kg Dichtungseinrichtung für einen Kraftstoffinjektor sowie Verfahren zum Abdichten
US7293550B2 (en) * 2006-01-31 2007-11-13 Gm Global Technology Operations, Inc. Fuel injector isolation seat
US20100171274A1 (en) * 2006-11-27 2010-07-08 Volvo Lastvagnar Ab Gasket ring
US7827964B2 (en) * 2009-01-14 2010-11-09 Ford Global Technologies Fuel injection system for internal combustion engine with injector isolator
CN102282358B (zh) * 2009-01-16 2015-12-02 伊利诺斯工具制品有限公司 用于燃油喷射系统的双相弹簧组件
DE102009000285A1 (de) * 2009-01-19 2010-07-22 Robert Bosch Gmbh Kraftstoff-Injektor sowie Brennkraftmaschine mit Kraftstoff-Injektor
DE112010002642B4 (de) * 2009-06-29 2022-12-22 Illinois Tool Works Inc. Brennstoffeinspritzdüseneinrichtung
RU204080U1 (ru) * 2020-12-31 2021-05-05 Иван Иванович Данилович Узел крепления свечного колодца системы зажигания в головке блока цилиндров

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3099456A (en) * 1960-08-01 1963-07-30 Harold P Hopp Thread forming sparkplug gaskets
US3038456A (en) * 1961-01-27 1962-06-12 Allis Chalmers Mfg Co Self-locking nozzle gasket
US3207524A (en) * 1962-07-23 1965-09-21 Nicholas D Trbovich Seal
US3299504A (en) * 1963-10-11 1967-01-24 Harold P Hopp Method of applying spark plug gaskets
US3431895A (en) * 1967-05-16 1969-03-11 Caterpillar Tractor Co Engine fuel injection valve assembly
US3695235A (en) * 1970-08-26 1972-10-03 Mcculloch Corp Heat seal for fuel injection nozzles
DE2149817B2 (de) * 1971-10-06 1975-08-21 Daimler-Benz Ag, 7000 Stuttgart Anordnung eines Kraftstoffeinspritzventils zur elektronisch gesteuerten Benzineinspritzung in den Ansaugkanal einer Brennkraftmaschine
US3971566A (en) * 1972-03-29 1976-07-27 Raychem Corporation Hydraulic sealing member and process
US4201172A (en) * 1972-07-10 1980-05-06 Robert Bosch Gmbh Fuel injection nozzle assembly for internal combustion engines
DE7232185U (de) * 1972-08-31 1975-06-12 Porsche F Ag Vorrichtung zur Halterung einer Brennstoffeinspritzdüse
GB1475312A (en) * 1973-10-12 1977-06-01 Angus Co Ltd G Piston or like sealing or packing
SU687248A1 (ru) * 1974-04-03 1979-09-25 Предприятие П/Я В-8735 Экран дл защиты распылител форсунки двигател внутреннего сгорани
DE2653674A1 (de) * 1976-11-26 1978-06-01 Bosch Gmbh Robert Einspritzventil fuer eine brennkraftmaschine
DE2824476C2 (de) * 1978-06-03 1983-03-17 Bayerische Motoren Werke AG, 8000 München Brennstoffeinspritzdüsenbefestigung an einer Brennkraftmaschine
GB2038961B (en) * 1979-01-03 1983-05-11 Nicholson T P Ring seal
US4346679A (en) * 1979-02-01 1982-08-31 Lucas Industries Limited Starting aids for internal combustion engines
JPS55176435U (pt) * 1979-06-05 1980-12-18

Also Published As

Publication number Publication date
ZA85495B (en) 1986-09-24
ES292800U (es) 1986-06-16
CA1221886A (en) 1987-05-19
EP0152763A1 (de) 1985-08-28
AU562899B2 (en) 1987-06-18
AU3723384A (en) 1985-08-01
US4528959A (en) 1985-07-16
ES292800Y (es) 1987-03-01
JPS60159365A (ja) 1985-08-20
BR8500236A (pt) 1985-08-27
DE3560602D1 (en) 1987-10-15
ATE29557T1 (de) 1987-09-15

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