EP0513020A1 - Injecteur de carburant avec raccordement au circuit de retour d'huile. - Google Patents

Injecteur de carburant avec raccordement au circuit de retour d'huile.

Info

Publication number
EP0513020A1
EP0513020A1 EP91901696A EP91901696A EP0513020A1 EP 0513020 A1 EP0513020 A1 EP 0513020A1 EP 91901696 A EP91901696 A EP 91901696A EP 91901696 A EP91901696 A EP 91901696A EP 0513020 A1 EP0513020 A1 EP 0513020A1
Authority
EP
European Patent Office
Prior art keywords
screw
injection nozzle
fuel injection
threaded shaft
longitudinal groove
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
EP91901696A
Other languages
German (de)
English (en)
Other versions
EP0513020B1 (fr
Inventor
Karl Hofmann
Werner Wagner
Peter Asslaender
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 EP0513020A1 publication Critical patent/EP0513020A1/fr
Application granted granted Critical
Publication of EP0513020B1 publication Critical patent/EP0513020B1/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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings

Definitions

  • the invention relates to a fuel injector with Leckol connection according to the preamble of the main claim.
  • a head cap with an axial blind hole in the threaded shaft and a cross hole near the head is mainly used / with which a ring with a connection nipple is pressed tightly against the nozzle holder.
  • Such a banjo bolt is made of steel by several processing operations such as turning, drilling, deburring and tempering.
  • the object of the invention is to provide a screw for connecting the collecting ring for the Leckol connection to a fuel injection nozzle, the screw of which is simple and cheap to produce.
  • the novel Leckol connection of the fuel injection nozzle according to the characterizing feature of the main claim has the advantage that the screw which allows the leak oil to the collecting ring can be produced by cold working. This manufacturing process, which is essentially reduced to cold forming, also eliminates the need for tempering due to strain hardening.
  • the arrangement of a plurality of longitudinal grooves in the threaded shaft of the screw, which run parallel or obliquely to the longitudinal axis, is particularly advantageous for a sufficient cross section for the leakage oil seal.
  • the longitudinal grooves can also be designed as flats of the threaded shaft.
  • FIG. 1 shows a part of a nozzle holder with a leak oil connection of a fuel injection nozzle in longitudinal view, partly in section
  • FIG. 2 shows a first embodiment of a cap screw of the leak oil connection in longitudinal view
  • FIG. 3 shows the cap screw according to FIG. 2 in plan view
  • FIG. 4 shows a second embodiment of a cap screw in Longitudinal section and Figure 5, the cap screw of Figure 4 in plan view ..
  • a nozzle holder 1 of a fuel injection nozzle has a channel 2 for returning the leak oil, which opens into a threaded bore 3.
  • a Leckol connection 5 is connected, which has a cap screw 10 with a threaded shaft 11 and with a head 12 and a collecting ring 14.
  • the screw 10 has several, preferably four longitudinal grooves 20 in the circumference of its threaded shaft 11, in the area of which the thread is interrupted.
  • the longitudinal grooves 20 run from the free end of the shaft 11 to close to the head 12 of the screw 10.
  • the longitudinal grooves 20 are formed as grooves 21 with a U-shaped cross section.
  • the depth of the grooves 21 is greater than the height of the thread in the shaft 11 of the screw 10, so that 11 channels for the passage of leak oil are formed between the back of the thread of the threaded bore 3 in the nozzle holder 1 and the bottom of the grooves 21 in the shaft.
  • the thread in the shaft 11 can be produced by rolling and the grooves 21 can be produced by cold forming.
  • two grooves 20 are formed in the form of flats 22 on the shaft 11 of the screw 10.
  • the thread and the flats 22 are formed by cold hammering, the die division running in the center line of the flats 22.
  • the grooves can not only run parallel to the axis of the threaded shaft 11 of the screw, but also obliquely or spirally to its axis.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

Un injecteur de carburant comporte un raccordement au circuit de retour d'huile (5) qui présente une vis à tête (10) vissée dans un orifice fileté (3) d'un porte-injecteur (1) et comportant un canal d'admission dans la tige filetée (11) et une bague collectrice (14) enserrée entre la tête (12) de la vis à tête et le porte-injecteur (1). Le canal d'admission se présente sous la forme d'au moins une rainure longitudinale (20, 21, 22) disposée sur le pourtour de la vis (10).
EP91901696A 1990-02-03 1991-01-17 Injecteur de carburant avec raccordement au circuit de retour d'huile Expired - Lifetime EP0513020B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE9001194U DE9001194U1 (de) 1990-02-03 1990-02-03 Kraftstoffeinspritzdüse mit Leckölanschluß
DE9001194U 1990-02-03
PCT/DE1991/000030 WO1991011606A1 (fr) 1990-02-03 1991-01-17 Injecteur de carburant avec raccordement au circuit de retour d'huile

Publications (2)

Publication Number Publication Date
EP0513020A1 true EP0513020A1 (fr) 1992-11-19
EP0513020B1 EP0513020B1 (fr) 1994-09-14

Family

ID=6850625

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91901696A Expired - Lifetime EP0513020B1 (fr) 1990-02-03 1991-01-17 Injecteur de carburant avec raccordement au circuit de retour d'huile

Country Status (5)

Country Link
EP (1) EP0513020B1 (fr)
JP (1) JP2851425B2 (fr)
BR (1) BR9105979A (fr)
DE (2) DE9001194U1 (fr)
WO (1) WO1991011606A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10201353B4 (de) * 2002-01-16 2004-04-08 Daimlerchrysler Ag Hochdruckanschluss für ein Kraftstoffeinspritzsystem für Brennkraftmaschinen
CN108940626A (zh) * 2018-09-05 2018-12-07 红塔烟草(集团)有限责任公司 一种喷嘴防溢漏装置
CN111830410B (zh) * 2020-07-24 2022-11-29 上海外高桥造船有限公司 一种柴油发电机组油头试验固定及集油装置
USD1023736S1 (en) 2022-10-27 2024-04-23 Fleece Performance Engineering, Inc. Bolt

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1521875A (en) * 1977-03-08 1978-08-16 Zuev A Fluid conduit apparatus and a method of making same
JPS5752376Y2 (fr) * 1979-02-26 1982-11-13
DE8104261U1 (de) * 1981-02-17 1981-08-06 Robert Bosch Gmbh, 7000 Stuttgart Fluessigkeitsgekuehlte kraftstoffeinspritzduese

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9111606A1 *

Also Published As

Publication number Publication date
BR9105979A (pt) 1992-11-10
DE59102948D1 (de) 1994-10-20
WO1991011606A1 (fr) 1991-08-08
DE9001194U1 (de) 1991-05-29
EP0513020B1 (fr) 1994-09-14
JPH05504389A (ja) 1993-07-08
JP2851425B2 (ja) 1999-01-27

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