EP0225487A1 - Injecteur de combustible particulièrement pour moteurs à combustion interne à auto-allumage - Google Patents

Injecteur de combustible particulièrement pour moteurs à combustion interne à auto-allumage Download PDF

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Publication number
EP0225487A1
EP0225487A1 EP86115429A EP86115429A EP0225487A1 EP 0225487 A1 EP0225487 A1 EP 0225487A1 EP 86115429 A EP86115429 A EP 86115429A EP 86115429 A EP86115429 A EP 86115429A EP 0225487 A1 EP0225487 A1 EP 0225487A1
Authority
EP
European Patent Office
Prior art keywords
protective cap
nozzle
injection nozzle
housing
nozzle housing
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
EP86115429A
Other languages
German (de)
English (en)
Other versions
EP0225487B1 (fr
Inventor
Karl Hofmann
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0225487A1 publication Critical patent/EP0225487A1/fr
Application granted granted Critical
Publication of EP0225487B1 publication Critical patent/EP0225487B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M61/14—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

Definitions

  • the invention relates to a fuel injection nozzle according to the preamble of the main claim.
  • the housing parts of the injection nozzle protruding from the mounting hole in the machine housing usually a nozzle holder receiving the closing spring and a union nut which clamps a nozzle body receiving the valve needle against the nozzle holder, are generally provided with a bonding layer as standard, which in some applications causes surface corrosion of the latter Parts not prevented.
  • An improved surface protection for example by galvanizing or painting the parts, raises u. U. significant problems and expensive parts.
  • the arrangement according to the invention with the characterizing features of the main claim solves the corrosion problem with simple and inexpensive means and also has the advantage that the protective cap can serve as an information carrier for the injection nozzle.
  • the protective cap can be color-coded and include the lettering for the nozzle half combination. The lettering can be injected, printed or applied to the protective cap by hot stamping.
  • the multi-part housing of which consists of a nozzle holder, a nozzle body and a union nut which excites the nozzle body against the nozzle holder
  • the protective cap only surrounds the part of the nozzle holder which is not covered by the union nut.
  • a protective cap designed in this way does not hinder the installation and removal of the injection nozzle, so that it does not have to be removed during assembly.
  • the protective cap is an integrated part of the nozzle holder combination, which, once blown open, always remains on the nozzle holder and can also be used for its unmistakable identification during storage.
  • FIG. 1 shows a partial section through a built-in injection nozzle according to the first embodiment
  • FIG. 2 shows a partial view of an injection nozzle according to the second embodiment.
  • the union nut 12 is also provided with a hexagon 30 and also with an external thread 32 with which the complete nozzle holder combination is screwed into the housing 34, 36 of an internal combustion engine.
  • a protective cap 40 is attached to the nozzle holder 10, which is designed as an inherently rigid plastic part and surrounds the parts of the nozzle holder combination that protrude from the housing part 34, namely the nozzle holder 10 and part of the union nut 12.
  • the protective cap 40 is provided at the top with two wall sections 43 forming a neck part 42, which engage behind the lower annular shoulder of the threaded connector 20 and are separated from one another by two radial slots 44 which are offset by 180 °, both of which are penetrated by a leakage oil tube 28 each.
  • a cylindrical section of the protective cap 40 adjoins the wall sections 43 and is guided on the cylindrical section 25 of the nozzle holder 10.
  • the cylindrical section 46 merges at an annular shoulder 50 into a section 52 surrounding the hexagon 24 of the nozzle holder 10 and then into a section 54 surrounding the hexagon 30 of the union nut 12, which section is extended into an enlarged bore section 56 of the housing part 34.
  • the annular shoulder 50 of the protective cap 40 sits on the transition groove between the cylindrical section 48 and the hexagon 24 of the nozzle holder 10 and limits the insertion depth of the protective cap 40.
  • the protective cap 40 covers the parts of the nozzle holder combination that protrude outward from the housing 34, 36 of the internal combustion engine practically up to the threaded connector 20, so that additional operations for the surface treatment of these parts are unnecessary.
  • the protective cap 40 is fitted onto the nozzle holder 10 after the assembly of the nozzle holder combination, the two wall sections 43 of the neck part 42 separated by the radial slots 44 resiliently latching behind the threaded connector 20 when the annular shoulder 50 comes to rest axially on the nozzle holder 10.
  • the protective cap 40 To remove the injection nozzle from the housing 34, 36, the protective cap 40 must be removed, which is not a problem due to the spring elasticity of the neck part 42.
  • a protective cap 60 is provided, which only overlaps regions of a nozzle holder 62 that are not covered by the union nut 12.
  • the protective cap 60 has a cylindrical section 66 which engages over the hexagon 24 of the nozzle holder 62.
  • the cylindrical section 66 fits into an annular shoulder 68 upwardly conically tapered section 70, which includes the section 64 of the nozzle holder 62 in the correct shape.
  • the section 70 is divided into two resilient wall sections 74 by two upwardly open cutouts 72, which engage behind the lower annular shoulder of the threaded connector 20.
  • the recesses 72 are so wide that they allow free access to the drain oil tubes 28.
  • the annular shoulder 68 together with an axial shoulder of the nozzle holder 62, delimits the axial insertion depth of the protective cap 60 at the transition between the section 64 and the hexagon 24.
  • the protective cap 60 is also provided with markings 76, 78 for identifying the injection nozzle, which are applied to the protective cap in a suitable manner.
  • This measure which can also be provided in the embodiment according to FIG. 1, eliminates color markings or inscriptions on the nozzle body 62 or 10 produced by rolling in.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP86115429A 1985-12-12 1986-11-07 Injecteur de combustible particulièrement pour moteurs à combustion interne à auto-allumage Expired - Lifetime EP0225487B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853543901 DE3543901A1 (de) 1985-12-12 1985-12-12 Kraftstoff-einspritzduese fuer insbesondere selbstzuendende brennkraftmaschinen
DE3543901 1985-12-12

Publications (2)

Publication Number Publication Date
EP0225487A1 true EP0225487A1 (fr) 1987-06-16
EP0225487B1 EP0225487B1 (fr) 1990-08-08

Family

ID=6288260

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86115429A Expired - Lifetime EP0225487B1 (fr) 1985-12-12 1986-11-07 Injecteur de combustible particulièrement pour moteurs à combustion interne à auto-allumage

Country Status (3)

Country Link
EP (1) EP0225487B1 (fr)
JP (1) JPS62142858A (fr)
DE (2) DE3543901A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2627232A1 (fr) * 1988-02-12 1989-08-18 Bosch Gmbh Robert Element d'identification pour des soupapes d'injection de carburant
GB2216184A (en) * 1988-02-18 1989-10-04 Daimler Benz Ag I.c engine fuel injector protective cap
WO2007017299A1 (fr) * 2005-08-05 2007-02-15 Robert Bosch Gmbh Injecteur de carburant

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3904773A1 (de) * 1988-02-18 1989-08-31 Daimler Benz Ag Kraftstoff-einspritzduese mit schutzkappe

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE902200C (de) * 1950-05-15 1954-01-21 Semt Zentrales Brennstoffventil fuer Brennkraftmaschinen
US3159350A (en) * 1961-03-06 1964-12-01 Bendix Corp Fuel injection valve device
DE1224092B (de) * 1959-07-04 1966-09-01 Kloeckner Humboldt Deutz Ag Einspritzbrennkraftmaschine
DE2027696A1 (de) * 1970-03-30 1971-10-21 VEB Barkas-Werke Ifa-Kombinat für Kraftfahrzeugteile Renak-Werke, χ 9800 Reichenbach Kraftstoffeinspritzventil für Verbrennungsmaschinen
FR2091778A5 (fr) * 1970-05-22 1972-01-14 Gen Motors Corp
GB2062101A (en) * 1979-10-30 1981-05-20 Bosch Gmbh Robert Fuel injection nozzle for an internal combustion engine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5036259Y2 (fr) * 1971-05-12 1975-10-22

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE902200C (de) * 1950-05-15 1954-01-21 Semt Zentrales Brennstoffventil fuer Brennkraftmaschinen
DE1224092B (de) * 1959-07-04 1966-09-01 Kloeckner Humboldt Deutz Ag Einspritzbrennkraftmaschine
US3159350A (en) * 1961-03-06 1964-12-01 Bendix Corp Fuel injection valve device
DE2027696A1 (de) * 1970-03-30 1971-10-21 VEB Barkas-Werke Ifa-Kombinat für Kraftfahrzeugteile Renak-Werke, χ 9800 Reichenbach Kraftstoffeinspritzventil für Verbrennungsmaschinen
FR2091778A5 (fr) * 1970-05-22 1972-01-14 Gen Motors Corp
GB2062101A (en) * 1979-10-30 1981-05-20 Bosch Gmbh Robert Fuel injection nozzle for an internal combustion engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2627232A1 (fr) * 1988-02-12 1989-08-18 Bosch Gmbh Robert Element d'identification pour des soupapes d'injection de carburant
GB2216184A (en) * 1988-02-18 1989-10-04 Daimler Benz Ag I.c engine fuel injector protective cap
GB2216184B (en) * 1988-02-18 1992-01-02 Daimler Benz Ag A fuel injection nozzle with a protective cap.
WO2007017299A1 (fr) * 2005-08-05 2007-02-15 Robert Bosch Gmbh Injecteur de carburant

Also Published As

Publication number Publication date
DE3673354D1 (de) 1990-09-13
EP0225487B1 (fr) 1990-08-08
DE3543901A1 (de) 1987-06-19
JPS62142858A (ja) 1987-06-26

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