EP0981714A1 - Bougie-crayon de prechauffage - Google Patents

Bougie-crayon de prechauffage

Info

Publication number
EP0981714A1
EP0981714A1 EP98966769A EP98966769A EP0981714A1 EP 0981714 A1 EP0981714 A1 EP 0981714A1 EP 98966769 A EP98966769 A EP 98966769A EP 98966769 A EP98966769 A EP 98966769A EP 0981714 A1 EP0981714 A1 EP 0981714A1
Authority
EP
European Patent Office
Prior art keywords
glow plug
bead
connecting bolt
filament
connection
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
EP98966769A
Other languages
German (de)
English (en)
Other versions
EP0981714B1 (fr
Inventor
Johannes Locher
Werner Teschner
Steffen Schott
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 EP0981714A1 publication Critical patent/EP0981714A1/fr
Application granted granted Critical
Publication of EP0981714B1 publication Critical patent/EP0981714B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • F23Q7/001—Glowing plugs for internal-combustion engines

Definitions

  • the invention relates to a glow plug according to the preamble of the main claim.
  • glow plugs there are currently essentially two variants for fastening or contacting the filament with the connecting bolt.
  • the first variant is a "hot-staking connection” in which the filament is welded to the connecting bolt.
  • the second variant, which the invention is concerned with, is a "plug-in connection".
  • a so-called plug-stem hole is machined at the lower end of the connecting bolt. The centering turns of the glow plug are inserted into this hole during assembly and then secured in position by radial caulking.
  • the glow plug according to the invention with the characterizing features of the main claim has the advantage that the previously machined hole in the connecting bolt is replaced by a cross-sectionally U-shaped recess. This allows the
  • FIG. 1 shows a glow plug, partly in longitudinal section
  • FIG. 2 shows a detail II according to FIG. 1,
  • FIG. 3 the lower end of the connecting bolt in partial section
  • FIG. 4 shows a side view with partial section according to FIG. 3,
  • the candle housing 11 of the glow plug 10 according to FIG. 1 has a continuous longitudinal bore 12.
  • a glow plug 14 is pressed into the lower part of the longitudinal bore of the candle housing. This consists of a glow tube 16, a connecting pin 17, a filament 18 with filling powder 19 in the glow plug and a seal 22 between the glow tube 16 and the connecting pin 17th
  • the connecting bolt 17 has a bore 22 at the lower end.
  • the incandescent filament essentially consists of two cylindrical areas with different winding diameters.
  • the smaller cylindrical region of the centering turn 18A of the incandescent filament 18 is inserted axially into the bore 23 of the connecting bolt 17.
  • the axial positioning of the filament is ensured by the stop of the area of the cylindrical filament turns 18 B with the larger winding diameter on the end face 17 A of the connecting bolt.
  • the pre-positioned incandescent filament is joined during assembly by simultaneous radial caulking at two or more opposite positions of the bore in the connecting bolt.
  • Figures 3 to 5 show different views of an example of the modification of the plug-stem connection according to the invention.
  • the design of the incandescent filament 18 remains unchanged compared to the illustration in FIGS. 1 and 2.
  • the plug hole according to the currently common embodiment of the invention is carried out according to Figures 3 to 5.
  • an elongated recess or bead 20 is formed, which is coaxial to
  • Longitudinal axis of the connecting bolt runs. It has a U-shaped cross-section, ie it has an opening 20A on one side and thereby ensures radial pre-positioning when the centering turns 18 A of the incandescent filament 18 are inserted.
  • the direction of assembly of the incandescent filament can be selected here axially or radially to the longitudinal axis of the bead 20 can be selected.
  • the axial positioning of the incandescent filament is ensured by the stop of the area of the cylindrical incandescent filament windings with the larger winding diameter 18 B on the end face 17A of the connecting bolt 17, analogously to FIGS. 2 and 4.
  • the centering windings 18 A thus pre-positioned coaxially with the longitudinal axis of the connecting bolt the incandescent filament is joined together by two or more simultaneous radial caulking 17 B or 17 C - see Figure 5-.
  • the radial caulking movement from the outside into the center on the outer contour of the U-shaped bead 20 causes a plastic deformation of the two legs 17 B, 17 C, so that both a positive and a positive connection between the connecting bolts 17 and 18 A centering turns Glow filament 18 is formed in the caulking area.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Resistance Heating (AREA)
  • Spark Plugs (AREA)

Abstract

L'invention concerne une bougie-crayon de préchauffage (10) présentant, par rapport à la technique antérieure, une liaison par enfichage/matage modifiée de sorte qu'il est possible d'amener, dans le sens radial et axial, la spire de centrage (18A) d'un filament boudiné (18) dans une moulure en U correspondante (20) de la tige de connexion (17). Après le positionnement préalable du filament boudiné dans la moulure, un matage du filament boudiné et de la tige de connexion peut être effectué, ou, si la forme de la moulure le permet, être supprimé. L'ouverture à la périphérie de la tige de connexion au niveau de la moulure (20) permet d'avoir accès au contour intérieur de la moulure dans le sens radial et axial. Il est ainsi possible d'assurer une élimination complète des lubrifiants organiques et de contrôler de façon fiable cette opération. L'invention permet d'empêcher les défaillances prématurées de bougies-crayon de préchauffage, provoquées par des impuretés organiques.
EP98966769A 1997-12-16 1998-12-10 Bougie-crayon de prechauffage Expired - Lifetime EP0981714B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19755822A DE19755822A1 (de) 1997-12-16 1997-12-16 Glühstiftkerze
DE19755822 1997-12-16
PCT/DE1998/003627 WO1999031438A1 (fr) 1997-12-16 1998-12-10 Bougie-crayon de prechauffage

Publications (2)

Publication Number Publication Date
EP0981714A1 true EP0981714A1 (fr) 2000-03-01
EP0981714B1 EP0981714B1 (fr) 2001-11-21

Family

ID=7852059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98966769A Expired - Lifetime EP0981714B1 (fr) 1997-12-16 1998-12-10 Bougie-crayon de prechauffage

Country Status (5)

Country Link
EP (1) EP0981714B1 (fr)
JP (1) JP2001511880A (fr)
DE (2) DE19755822A1 (fr)
ES (1) ES2168810T3 (fr)
WO (1) WO1999031438A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006052634A1 (de) 2006-11-08 2008-05-15 Robert Bosch Gmbh Kraftstoffheizer
DE102007001648A1 (de) 2007-01-11 2008-07-17 Robert Bosch Gmbh Glühstiftkerze
DE102007003217A1 (de) 2007-01-22 2008-07-24 Robert Bosch Gmbh Glühstrahl für Glühzündung
JP5352296B2 (ja) * 2009-03-17 2013-11-27 日本特殊陶業株式会社 シースヒータ及びグロープラグ並びにシースヒータの製造方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3035542A1 (de) * 1980-09-20 1982-05-06 Robert Bosch Gmbh, 7000 Stuttgart Gluehstiftkerze fuer brennkraftmaschinen
DE3911831A1 (de) * 1989-04-11 1990-10-18 Bosch Gmbh Robert Starthilfevorrichtung fuer dieselmotoren, insbesondere gluehstiftkerze oder flammkerze
DE9112242U1 (de) * 1991-10-01 1991-11-28 BERU Ruprecht GmbH & Co KG, 7140 Ludwigsburg Temperaturmeßglühkerze
DE4133338A1 (de) * 1991-10-08 1993-04-15 Beru Werk Ruprecht Gmbh Co A Gluehkerze

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9931438A1 *

Also Published As

Publication number Publication date
WO1999031438A1 (fr) 1999-06-24
ES2168810T3 (es) 2002-06-16
EP0981714B1 (fr) 2001-11-21
DE19755822A1 (de) 1999-06-24
JP2001511880A (ja) 2001-08-14
DE59802735D1 (de) 2002-02-21

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