EP3945206A1 - Surface de serrage d'injecteur - Google Patents

Surface de serrage d'injecteur Download PDF

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Publication number
EP3945206A1
EP3945206A1 EP21000191.3A EP21000191A EP3945206A1 EP 3945206 A1 EP3945206 A1 EP 3945206A1 EP 21000191 A EP21000191 A EP 21000191A EP 3945206 A1 EP3945206 A1 EP 3945206A1
Authority
EP
European Patent Office
Prior art keywords
screw
claw
injector
internal combustion
combustion engine
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
EP21000191.3A
Other languages
German (de)
English (en)
Other versions
EP3945206B1 (fr
Inventor
Samir Elfi
Martin Grawitter
Jens Wannhoff
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.)
Deutz AG
Original Assignee
Deutz 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 Deutz AG filed Critical Deutz AG
Publication of EP3945206A1 publication Critical patent/EP3945206A1/fr
Application granted granted Critical
Publication of EP3945206B1 publication Critical patent/EP3945206B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M61/14—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
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M2200/852—Mounting of fuel injection apparatus provisions for mounting the fuel injection apparatus in a certain orientation, e.g. markings or notches
    • 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
    • F02M2200/855—Mounting of fuel injection apparatus using clamp elements or fastening means, e.g. bolts or screws
    • 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 an injector brace with a claw screw on an internal combustion engine.
  • EP 2 113 654 B1 an assembly compound for attaching one or more injector holders to a cylinder head of an internal combustion engine.
  • DE 10340911 B4 shows such an injector sprawl on an internal combustion engine.
  • a device for attaching an injector holder on the cylinder head by means of a two-armed clamp and a clamping screw is, for example, from DE 195 21 363 C1 known.
  • the fork-shaped claw arms of the clamping claw on the injector holder and the clamping screw on the clamping claw must be threaded on site for each injector of the internal combustion engine, since they cannot be assembled together due to their structurally predetermined shape. This prevents automatic assembly of the injector nozzle holder on the cylinder head.
  • the nozzle clamping device has contact parts which are seated on clamping receiving seats of the fuel injection nozzles. Between the contact portions, the nozzle clamp has a bolt insertion hole into which a clamp bolt is inserted to apply pressure against the fuel injectors and impart sealing loads.
  • the nozzle clamp includes clearance which reduces the compressive force on the fuel injectors so that at a predetermined level of bolt tightening force there is substantially equal compressive force on the three fuel injectors.
  • the nozzle clamp is made of a spring material such that the nozzle clamp is easily bent.
  • the object of the invention is to achieve the above To avoid disadvantages and an internal combustion engine of the o. Art to improve in terms of assembly and ease of maintenance, which at the same time increases the elasticity of the screw association.
  • In 1 shows an injection injector strut, which uses a claw 1 to fasten an injector 3 to a cylinder head of a diesel internal combustion engine.
  • a beam-like element supports the clamping claw 1 with it one end on a bearing surface 2 on the injector 3, while the second end on the cylinder head 4 comes to rest on a surface 5.
  • a screw 7 arranged between the two ends presses the claw 1 against the bearing surfaces, which results in the axial compressive force on the injector for sealing and fixes the injector in the receiving bore 9 .
  • the receiving bore 9 for the injector 3 is only partially realized by a bore in the cylinder head.
  • a copper sleeve 10 is installed in a hole through the water jacket, the interior of which forms the mounting hole for the injector 3 .
  • the sealing ring 11 of the injector 3 also rests in this copper sleeve 10 and seals the combustion chamber from the annular fuel chamber between the injector 3 and the copper sleeve 10 .
  • the high level of compression on the sealing ring support on the copper sleeve side can lead to settling and, as a result, to a drop in the sealing force on the injector. The result is leaks.
  • a claw screw connection can be seen, which leads to increased elasticity of the screw connection, so that the loss of sealing force as a result of setting is significantly reduced.
  • a sleeve 12 is installed between the screw head collar 17 and the clamping claw 1.
  • the screw 7 is designed as an expansion screw 7 with a reduced shank diameter.
  • the length of the screw, which is greatly increased by the sleeve 12, and the reduced shank diameter of the expansion screw 7 significantly increase the elasticity of the screw association.
  • a further contribution to the increase in elasticity is achieved by the sleeve 12 itself.
  • the result is a greatly increased overall elasticity in the screw connection, which significantly reduces the loss of pre-tensioning force when there are signs of settling.
  • FIG. 1 shows an injection injector strut, which uses a claw 1 to fasten an injector 3 to a cylinder head of a diesel internal combustion engine.
  • the clamping claw 1 is supported with one end on a bearing surface 2 on the injector 3, while the second end on the cylinder head 4 comes to rest on a surface 5.
  • a screw 7 arranged between both ends presses the claw 1 by means of a sleeve 12, which is arranged concentrically around the claw screw 7 between the claw screw 7 and the clamping claw 1, against the bearing surfaces 2 and 5, which results in the axial compressive force on the injector for sealing and the injector 3 fixed in the mounting hole 9.
  • the claw screw 7 is designed as an expansion screw with a reduced shank diameter.
  • the sleeve 12 has a conical surface 18 on the underside to rest on the convex counter-surface of the clamping claw 1. On the upper side, the sleeve has a flat contact surface 16 towards the screw head collar 17, so that the contact surface 16 is arranged perpendicular to the screw axis and plane-parallel to the screw head collar applied.
  • the receiving bore 9 for the injector 3 is only partially realized by a bore in the cylinder head.
  • a copper sleeve 10 is installed in a hole through the water jacket, the interior of which forms the mounting hole for the injector 3 .
  • the sealing ring 11 of the injector 3 is also used in this copper sleeve 10 , which seals the combustion chamber against the annular fuel chamber between the injector 3 and the copper sleeve 10 .
  • the claw screw 7 has three collars 13, 14, 15 on the shaft.
  • the lower collar 13 is used to center the clamping claw 1.
  • the middle collar 14 and the upper collar 15 are used to center the sleeve 12, with which a stable construction of the connection is achieved.
  • the sleeve 12 Due to the conical shape of the sleeve at the contact surface 18 to the claw 1, the sleeve 12 must not be installed the wrong way round, ie with the conical support 18 facing the screw head.
  • the bore of the sleeve 12 is stepped.
  • the diameter of the lower part 19 of the hole is smaller than that of the centering collar 14 of the screw 7 .
  • the position of the central collar 14 is chosen so that the thread the screw 7 cannot engage in the threaded hole on the cylinder head 4 to prevent incorrect assembly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
EP21000191.3A 2020-07-30 2021-07-20 Surface de serrage d'injecteur Active EP3945206B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020004625.8A DE102020004625A1 (de) 2020-07-30 2020-07-30 lnjektorverpratzung

Publications (2)

Publication Number Publication Date
EP3945206A1 true EP3945206A1 (fr) 2022-02-02
EP3945206B1 EP3945206B1 (fr) 2024-05-01

Family

ID=77155489

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21000191.3A Active EP3945206B1 (fr) 2020-07-30 2021-07-20 Surface de serrage d'injecteur

Country Status (4)

Country Link
US (1) US11603816B2 (fr)
EP (1) EP3945206B1 (fr)
CN (1) CN114060194A (fr)
DE (1) DE102020004625A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022211054A1 (de) 2022-10-19 2024-04-25 Robert Bosch Gesellschaft mit beschränkter Haftung Kraftstoffinjektoranordnung zur Montage eines Kraftstoffinjektors in einer Brennkraftmaschine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11608804B1 (en) * 2021-08-25 2023-03-21 Caterpillar Inc. Fuel injector having side-fitted fuel connector for tight packaging in top-feed fuel system

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19521363C1 (de) 1995-06-12 1996-09-05 Daimler Benz Ag Vorrichtung zur Befestigung eines Einspritzdüsenhalters
EP0751290B1 (fr) 1995-06-26 2000-03-22 Isuzu Motors Limited Structure de fixation d'une tuyère d'injection de combustible
US6170467B1 (en) * 1997-05-20 2001-01-09 Automobiles Peugeot Device for fixing a fuel injector on an internal combustion engine cylinder head, and method for fixing said injector
US20040159311A1 (en) * 2003-02-19 2004-08-19 Anello Anthony M. Fuel injector clamp with retaining sleeve
EP1887215A1 (fr) * 2006-08-01 2008-02-13 Siemens Aktiengesellschaft Dispositif de serrage et culasse
US7334572B1 (en) 2007-01-30 2008-02-26 Ford Global Technologies, Llc System and method for securing fuel injectors
DE102007050512A1 (de) 2007-10-23 2009-04-30 Volkswagen Ag Brennkraftmaschine mit Kraftstoffinjektoren
EP2113654B1 (fr) 2008-05-02 2014-05-07 Robert Bosch Gmbh Ensemble de montage à support de bus d'injection doté d'une griffe de serrage
DE10340911B4 (de) 2003-09-05 2014-12-04 Robert Bosch Gmbh Spannhülse mit Temperaturkompensation

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK128023B (da) * 1970-03-12 1974-02-18 Burmeister & Wain S Af As Brændselsindsprøjtningsventil til forbrændingsmotorer.
US3924583A (en) * 1974-06-21 1975-12-09 Caterpillar Tractor Co Mounting apparatus
AT350854B (de) * 1976-08-26 1979-06-25 List Hans Vorrichtung zur befestigung einer in einer bohrung eines zylinderkopfes einer brennkraft- maschine aufgenommenen kraftstoffeinspritzduese
US4246877A (en) * 1979-07-27 1981-01-27 General Motors Corporation Notched injector hold-down clamp
JPH10252609A (ja) * 1997-01-13 1998-09-22 Yamaha Motor Co Ltd 筒内噴射エンジン
JP3357584B2 (ja) * 1997-09-26 2002-12-16 株式会社クボタ エンジンの燃料噴射器取付け装置
GB2337083A (en) * 1998-05-09 1999-11-10 Perkins Engines Co Ltd A fuel injector clamp for an internal combustion engine
JP3637245B2 (ja) * 1999-07-28 2005-04-13 三菱重工業株式会社 シリンダヘッドの燃料噴射装置取付構造
US6431152B1 (en) * 2001-03-30 2002-08-13 International Engine Intellectual Property Company, L.L.C. Injector hold down clamp
US6745752B1 (en) * 2003-02-19 2004-06-08 International Engine Intellectual Property Company, Llc Fuel injector clamp with retaining ring
FR2864170B1 (fr) * 2003-12-19 2007-09-07 Renault Sas Dispositif de positionnement d'une bride de porte injecteur
DE112011103126T5 (de) * 2010-10-20 2013-09-12 Illinois Tool Works Inc. Kraftstoffeinspritzvorrichtungshalterungsanordnung
DE102017221334A1 (de) * 2017-11-28 2019-05-29 Borgward Trademark Holdings Gmbh Struktur zum Festdrücken eines Kraftstoffinjektors und Motor

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19521363C1 (de) 1995-06-12 1996-09-05 Daimler Benz Ag Vorrichtung zur Befestigung eines Einspritzdüsenhalters
EP0751290B1 (fr) 1995-06-26 2000-03-22 Isuzu Motors Limited Structure de fixation d'une tuyère d'injection de combustible
US6170467B1 (en) * 1997-05-20 2001-01-09 Automobiles Peugeot Device for fixing a fuel injector on an internal combustion engine cylinder head, and method for fixing said injector
US20040159311A1 (en) * 2003-02-19 2004-08-19 Anello Anthony M. Fuel injector clamp with retaining sleeve
DE10340911B4 (de) 2003-09-05 2014-12-04 Robert Bosch Gmbh Spannhülse mit Temperaturkompensation
EP1887215A1 (fr) * 2006-08-01 2008-02-13 Siemens Aktiengesellschaft Dispositif de serrage et culasse
US7334572B1 (en) 2007-01-30 2008-02-26 Ford Global Technologies, Llc System and method for securing fuel injectors
DE102007050512A1 (de) 2007-10-23 2009-04-30 Volkswagen Ag Brennkraftmaschine mit Kraftstoffinjektoren
EP2113654B1 (fr) 2008-05-02 2014-05-07 Robert Bosch Gmbh Ensemble de montage à support de bus d'injection doté d'une griffe de serrage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022211054A1 (de) 2022-10-19 2024-04-25 Robert Bosch Gesellschaft mit beschränkter Haftung Kraftstoffinjektoranordnung zur Montage eines Kraftstoffinjektors in einer Brennkraftmaschine

Also Published As

Publication number Publication date
US11603816B2 (en) 2023-03-14
US20220034286A1 (en) 2022-02-03
CN114060194A (zh) 2022-02-18
EP3945206B1 (fr) 2024-05-01
DE102020004625A1 (de) 2022-02-03

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