EP0981714B1 - Bougie-crayon de prechauffage - Google Patents

Bougie-crayon de prechauffage Download PDF

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Publication number
EP0981714B1
EP0981714B1 EP98966769A EP98966769A EP0981714B1 EP 0981714 B1 EP0981714 B1 EP 0981714B1 EP 98966769 A EP98966769 A EP 98966769A EP 98966769 A EP98966769 A EP 98966769A EP 0981714 B1 EP0981714 B1 EP 0981714B1
Authority
EP
European Patent Office
Prior art keywords
connecting bolt
sheathed
bead
glow
filament
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 - Lifetime
Application number
EP98966769A
Other languages
German (de)
English (en)
Other versions
EP0981714A1 (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

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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 Genus of the main claim.
  • Glow plugs in two main variants Fixing or contacting the filament with the connecting bolt.
  • the first variant is a "hot staking connection” where the filament is welded to the connecting bolt.
  • the second A variant with which the invention is concerned is one "Plug-in connection”.
  • For this type of connection at the lower end of the connecting bolt is a so-called push-mortise hole machined. Be in this hole the centering turns of the filament during assembly introduced and then by radial caulking in secured in their position, e.g. WO-A-9307423.
  • the candle housing 11 of the glow plug 10 according to FIG. 1 has a continuous longitudinal bore 12.
  • a glow plug 14 pressed in This consists of a glow tube 16, one Connection bolt 17, a filament 18 with filling powder 19 in Glow plug and a seal 22 between glow tube 16 and Connection bolt 17.
  • the Terminal bolt 17 has a bore 22 at the lower end.
  • the filament consists essentially of two cylindrical areas with different Winding diameters.
  • the smaller cylindrical area of the Centering 18A of the filament 18 is axially in the Bore 23 of the connecting bolt 17 is inserted.
  • the axial Positioning of the filament is over the stop of the Range of the cylindrical filament turns 18 B with the larger turn diameter on the front side 17 A of Connection bolt guaranteed. That way pre-positioned filament is removed during assembly simultaneous radial caulking on two or more opposite positions of the bore in the Connection bolts added.
  • the resulting plastic Deformation of the bore caused by the ellipsoidal Training the same both a power and one positive connection in the area of caulking.
  • Figures 3 to 5 show different views of a Example of the modification of the plug-stem connection according to the invention.
  • the design of the filament 18 remains in the Comparison to the representation in Figures 1 and 2 unchanged.
  • the Plug-in hole according to the current common invention Execution is carried out according to FIGS. 3 to 5.
  • in the lower end of the connecting bolt 17 is an elongated Recess or bead 20 formed, the same axis to Longitudinal axis of the connecting bolt runs. It has a U-shaped shape Cross-section, i.e. it has an opening on one side 20A and thereby ensures radial pre-positioning when inserting the centering turns 18 A of the incandescent filament 18.
  • the direction of installation of the filament can be optional selected axially or radially to the longitudinal axis of the bead 20 become.
  • the axial positioning of the filament is determined by the Stop the area of the cylindrical filament turns with the larger winding diameter 18 B on the front side 17A of the connecting bolt 17 ensures, analogous to that Figures 2 and 4.
  • the axially in this way Pre-positioned longitudinal axis of the connecting bolt Centering turns 18 A of the filament are replaced by two or several simultaneous radial caulking 17 B or 17 C - see Figure 5- joined together.
  • 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 as well as a positive connection between Connection bolt 17 and centering turns 18 A of the filament 18 arises in the caulking area.

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  • 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)

Claims (6)

  1. Bougie-crayon (10) pour la mise en place dans une chambre de combustion de moteurs à combustion interne, comportant une enveloppe métallique de forme tubulaire (11), dont le perçage longitudinal (12) reçoit une tige incandescente (14) étanche sur une partie de sa longueur, comportant également un boulon de connexion (17), servant à la transmission du courant, et particllement incorporé dans la tige incandescente, dans lequel est formée une cavité axiale tournée vers la pointe de la tige et dans laquelle est constituée une liaison par l'intermédiaire d'un dispositif « Steck-stemm » entre le boulon de connexion (17) et des enroulements de centrage (18A) du filament incandescent (18),
    caractérisée en ce que
    la cavité située dans l'extrémité du boulon de connexion (17) tournée vers la pointe de la bougie, s'étend longitudinalement en direction de l'axe du boulon de connexion et a une forme de moulure (20); c'est-à-dire ouverte à la périphérie vers un côté, dont la largeur d'ouverture selon la périphérie du boulon de connexion correspond approximativement au diamètre des enroulements de centrage (18A) du filament incandescent (18).
  2. Bougie-crayon selon la revendication 1,
    caractérisée en ce que
    la cavité ou la moulure (20) présente une section en forme de U et possède, aussi bien sur la face frontale que sur la périphérie du boulon de connexion (17) une ouverture (20A) rendant possible le montage, le netioyagé et les essais de la cavité en direction radiale et/ou axlale.
  3. Bougie-crayon selon la revendication 1 ou 2,
    caractérisée en ce que
    le contour intérieur de la cavité ou de la moulure (20), de même axe que l'axe longitudinal du boulon de connexion (17) est réalisé par enlèvement de métal, tel que fraisage, rectification, ou par un procédé par déformation, tel que laminage, frappe à froid etc.
  4. Bougie-crayon selon la revendication 2 ou 3,
    caractérisée en ce que
    le contour intérieur de la cavité (20) en forme de U de même axe que l'axe longitudinal du boulon de connexion (17) garantit le prépositionnement radial des enroulements de centrage (18A) du filament incandescent (18).
  5. Bougie-crayon selon la revendication 2 à 4,
    caractérisée en ce que
    le filament incandescent (18) prépositionné au montage est emboíté dans le boulon de connexion par un sertissage radial simultané sur plusieurs endroits opposés les uns aux autres (17B, 17C) de la moulure (20), de sorte que la déformation plastique ainsi provoquée de cette moulure, du fait de la forme ellipsoïdale de celle-ci, constitue aussi bien une liaison de force qu'une liaison de forme avec les enroulements de centrage du filament incandescent.
  6. Bougie-crayon selon la revendication 1 à 5,
    caractérisée en ce que
    l'ouverture (20A) de la moulure (20) se rétrécit en direction radiale de l'intérieur vers l'extérieur dans une proportion plus faible que le diamètre des enroulements de centrage du filament incandescent, et le contour intérieur de la moulure (20) fait en sorte que, par la compression radiale des enroulements de centrage dans l'ouverture (20A) du boulon de connexion (17), par suite de l'accroissement de dimension engendré par la géométrie, s'instaure un assemblage serré qui économise l'opération de sertissage lors du montage.
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 EP0981714A1 (fr) 2000-03-01
EP0981714B1 true 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

Also Published As

Publication number Publication date
WO1999031438A1 (fr) 1999-06-24
EP0981714A1 (fr) 2000-03-01
ES2168810T3 (es) 2002-06-16
DE19755822A1 (de) 1999-06-24
JP2001511880A (ja) 2001-08-14
DE59802735D1 (de) 2002-02-21

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