WO1986001878A1 - Bougie-crayon de chauffage pour moteurs a combustion interne - Google Patents

Bougie-crayon de chauffage pour moteurs a combustion interne Download PDF

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Publication number
WO1986001878A1
WO1986001878A1 PCT/DE1985/000315 DE8500315W WO8601878A1 WO 1986001878 A1 WO1986001878 A1 WO 1986001878A1 DE 8500315 W DE8500315 W DE 8500315W WO 8601878 A1 WO8601878 A1 WO 8601878A1
Authority
WO
WIPO (PCT)
Prior art keywords
glow plug
insulating sleeve
connecting bolt
metal housing
plug according
Prior art date
Application number
PCT/DE1985/000315
Other languages
German (de)
English (en)
Inventor
Gerhard HÜFTLE
Josef Tosch
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 WO1986001878A1 publication Critical patent/WO1986001878A1/fr

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 type of the main claim.
  • a glow plug is already known (DE-GbmS 1 929 292), in which the connecting bolt is provided with a thread which plunges deep into the longitudinal bore of the metal housing and is partially surrounded by a silicone rubber tube; this silicone rubber hose is encompassed by the connection-side, compressed section of the metal housing and forms the seal and electrical insulation between the connecting bolt and the metal housing.
  • the glow plug according to the invention with the characterizing features of the main claim has the advantage that its connecting bolt is securely held against torsional forces occurring when connecting and disconnecting connecting cables.
  • connection bolt is composed of a cylindrical metal rod and a tubular connection head which is fixed on the connection-side region of the metal rod and has projections and / or inlets on its outside,
  • FIG. 1 shows an enlarged longitudinal section through the connection-side area of a glow plug according to the invention and FIG. 2 shows a cross section along the line AB through the enlarged glow plug according to FIG. 1.
  • the glow plug 10 shown in FIGS. 1 and 2 the structure of which essentially derives from the aforementioned DE-GbmS 1 9.29. 292 or also known from DE-OS 28 35 236, has a tubular metal housing 11, on the outside of which a key hexagon 12, a screw thread, not shown, and a sealing element, also not shown (z, B, frustoconical sealing surface or sealing ring) are arranged are and which has a longitudinal bore 13.
  • the part of the glow plug which protrudes from the end section of the metal housing 12 and is equipped with the actual glow element is not shown in FIGS. 1 and 2, but is also not relevant in connection with the present invention, but is known from the aforementioned prior art.
  • connection pin 14 is composed of two parts, namely a cylindrical metal rod 14/1 and a metal connection head 14/2; the connection head 14/2 has a central inner bore 15 with which it is pushed onto the end section of the metal rod 14/1 that is remote from the combustion chamber, but in this case projects somewhat beyond the end surface 16 remote from the combustion chamber.
  • connection head 14/2 The blind hole 17 formed by this end face 16 of the metal rod 14/1 and the section of the inner bore 15 of the connection head 14/2 remote from the combustion chamber serves to fix the connection head 14/2 on the metal rod 14/1, namely by means of a brazing point 18, the section remote from the combustion chamber of the connection head 14/2 is on its outside with a connection thread 19 provided, on which a nut 20 is screwed; this nut 20 has an end surface 21 remote from the combustion chamber as a system for a connection cable (not shown), an end surface 22 on the combustion chamber side and an annular notch 23 running coaxially on the outside, which serves to fix this nut 20 on the connection thread 19 of the connection bolt 14 (e.g. by Caulking).
  • the nut 20 screwed onto the connecting thread 19 of the connecting bolt 14 presses with its end face 22 on the combustion chamber side onto the end face 24 remote from the combustion chamber, which is made of a plastic, in particular a thermoplastic;
  • a thermoplastic of this type is preferably used for this insulating sleeve 25 and can be deformed by the use of vibration (eg, by means of ultrasound).
  • This insulating sleeve 25 which consists for example of a polyamide, is located partially in the end portion of the longitudinal bore 13 of the metal housing 1.1; the insulating sleeve 25 rests with its outer side 26 in the affected section of the longitudinal bore 13 of the metal housing 11 and also firmly encloses with its inner side 27 the section of the connecting head 14/2 of the connecting bolt 14 which plunges into the longitudinal bore 13 of the metal housing 11, this insulating sleeve 25 , which is used for electrical insulation between the electrically grounded metal housing 11 with respect to the connecting bolts 14 between the two components 11 and 14 mentioned, cooperates with the longitudinal bore 13 of the metal housing 11 and the connecting bolt 14 so that they when connecting and disconnecting Connection cables, not shown, absorbs tension and torsional forces which could cause damage to the glow plug 10.
  • the longitudinal bore in the area remote from the combustion chamber 13 of the metal housing 11 has at least one inlet 28 or at least one projection 29 which is firmly engaged with the outside 26 of the insulating sleeve 25, and that the connecting bolt 14 also has at least one inlet 30 or a projection 31 which with the inside 27 of the insulating sleeve 25 is firmly engaged.
  • several such inlets 28 and 30 or projections 29 and 31 are arranged both in the longitudinal bore 13 of the metal housing 11 and on the corresponding area of the connection head 14/2, and preferably distributed evenly over the respective circumference.
  • a combination of projections and inlets was chosen within the longitudinal bore 13 of the metal housing 11, because this design is expedient for manufacturing reasons:
  • two inlets 28/1 and 28/2 incorporated, which are spaced one above the other and are connected to one another by longitudinally extending, groove-like inlets 28/3; the latter inlets 28/3, four of which are evenly distributed on the circumference of the longitudinal bore 13 of the metal housing 11 in the example, alternate in the circumference with projections 29/1 and absorb torsional forces which act on the connecting bolts 14 and / or Insulating sleeve 25 act.
  • the diameter of the annular groove-like inlet 28/2 is smaller in the exemplary embodiment than the outer diameter of the annular groove-like inlet 28/1,
  • connection head 14/2 The protruding into the longitudinal bore 13 of the metal housing 11 section of the connection head 14/2 is ver in the present example with four evenly on the circumference shared projections 31 equipped, which run like ribs in the longitudinal direction of the connecting bolt 14; in this case, the shoulder 32 remote from the combustion chamber and also the shoulder 33 of the connection head 14/2, which runs in the shape of a truncated cone and runs in the shape of a truncated cone, is partially surrounded by the inside 27 of the insulating sleeve 27.
  • the inlets located between the projections 31 of the connection head 14/2 are designated by the reference number 30.
  • the insulating sleeve 25 is preferably deformed by using ultrasound such that the inlets 28 and projections 29 in the metal housing 11 and also the inlets 30 and projections 31 in the connection head 14/2 are filled by the insulating sleeve 25 an annular shoulder 35 is incorporated into the end face 34 of the metal housing 11 remote from the combustion chamber and limits the outer diameter of the insulating sleeve 25 in this area; this region of the insulating sleeve 25 preferably has an outer diameter which corresponds to the outer diameter of the nut 20.
  • the inlets 28 or projections 29 in the longitudinal bore 13 of the metal housing 11 with the inlets 30 or the projections 31 on the connection head 14/2 can lie arbitrarily.
  • the insulating sleeve 25 made of plastic is mentioned, but the insulating sleeve 25 can also consist of a suitable putty, casting resin or glass; in this case, the dimensions between the affected area in the longitudinal bore 13 of the metal housing 11 and the connecting bolt 14 are to be interpreted accordingly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spark Plugs (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

Bougie-crayon de chauffage (10), servant à allumer un mélange de combustible vaporisé et d'air dans des moteurs à combustion interne. La bougie (10) entoure de son logement annulaire métallique (11) une tige de chauffage électrique du bout de laquelle dépasse une vis de connexion (14). Une enveloppe isolante (25) est posée sur cette vis de connexion (14), comblant ainsi le vide entre la vis de connexion (14) et le logement métallique (11). Au droit de cette enveloppe isolante (25) la vis de connexion (14) et/ou le logement métallique (11) possèdent des protubérances ou évidements (26) annulaires qui protègent la vis de connexion contre les forces de traction. La vis de connexion (14) est, cependant, également dotée d'au moins une protubérance (31) ou d'un évidement (30) la protégeant contre la torsion; dans l'alésage longitudinal également on peut prévoir des protubérances (29) ou évidements qui résistent à la torsion de la vis de connection (14). La tête de la vis de connexion, qui comporte les protubérances (31) ou évidements (28, 30) et peut également porter le filetage de connexion (19),est réalisée, de préférence, sous forme d'une composante séparée (14/2) et est fixée à la vis de connexion (14).
PCT/DE1985/000315 1984-09-21 1985-09-11 Bougie-crayon de chauffage pour moteurs a combustion interne WO1986001878A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEG8427789.0U 1984-09-21
DE19848427789 DE8427789U1 (de) 1984-09-21 1984-09-21 Glühstiftkerze für Brennkraftmaschinen

Publications (1)

Publication Number Publication Date
WO1986001878A1 true WO1986001878A1 (fr) 1986-03-27

Family

ID=6770913

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1985/000315 WO1986001878A1 (fr) 1984-09-21 1985-09-11 Bougie-crayon de chauffage pour moteurs a combustion interne

Country Status (5)

Country Link
EP (1) EP0194292A1 (fr)
JP (1) JPS62500258A (fr)
DE (1) DE8427789U1 (fr)
ES (1) ES289122Y (fr)
WO (1) WO1986001878A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991002196A1 (fr) * 1989-07-28 1991-02-21 Caterpillar Inc. Connexion d'interference entre un element chauffant et le corps d'une bougie de prechauffage
WO2001069135A1 (fr) * 2000-03-14 2001-09-20 Robert Bosch Gmbh Bougie crayon de prechauffage pour un moteur a combustion interne
WO2005026619A1 (fr) * 2003-08-28 2005-03-24 Robert Bosch Gmbh Bougie de prechauffage a element de contact specialement encastre

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT235871Y1 (it) * 1995-05-31 2000-07-18 Cooper Ind Inc Guarnizione oscillante e autopulente per una resistenza corazzata diuna candela di pre-riscaldo per motori diesel
IT1285043B1 (it) * 1996-03-29 1998-06-03 Cooper Ind Italia Candela riscaldante ad incandescenza, particolarmente per motori a ciclo diesel
DE19920758C1 (de) * 1999-05-05 2000-12-21 Beru Ag Glühkerze und Verfahren zur Herstellung derselben
FR3021094A1 (fr) * 2014-05-13 2015-11-20 Bosch Gmbh Robert Electrode de prechauffage a joint d'isolation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1003507B (de) * 1955-12-12 1957-02-28 Walter Goetze Befestigung der mit Gewinde oder Rillen versehenen Mittelelektrode im Isolierkoerper einer Zuendkerze fuer Brennkraftmaschinen
FR2329088A1 (fr) * 1975-10-21 1977-05-20 Djeddah Jacques Bougie ou electrode d'allumage pour bruleur
JPS53141840A (en) * 1977-05-16 1978-12-11 Ngk Spark Plug Co Ltd Manufacturing method of sheathed glow plug
DE3211262A1 (de) * 1981-03-23 1982-11-04 Jidosha Kiki Co., Ltd., Tokyo Gluehkerze zur verwendung in einem dieselmotor und verfahren zu ihrer herstellung
EP0105807A1 (fr) * 1982-09-30 1984-04-18 The Bendix Corporation Bougie à incandescence à chauffage par surface conductrice

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1003507B (de) * 1955-12-12 1957-02-28 Walter Goetze Befestigung der mit Gewinde oder Rillen versehenen Mittelelektrode im Isolierkoerper einer Zuendkerze fuer Brennkraftmaschinen
FR2329088A1 (fr) * 1975-10-21 1977-05-20 Djeddah Jacques Bougie ou electrode d'allumage pour bruleur
JPS53141840A (en) * 1977-05-16 1978-12-11 Ngk Spark Plug Co Ltd Manufacturing method of sheathed glow plug
DE3211262A1 (de) * 1981-03-23 1982-11-04 Jidosha Kiki Co., Ltd., Tokyo Gluehkerze zur verwendung in einem dieselmotor und verfahren zu ihrer herstellung
EP0105807A1 (fr) * 1982-09-30 1984-04-18 The Bendix Corporation Bougie à incandescence à chauffage par surface conductrice

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, Vol. 3, No. 16 (M48) 10 February 1979 & JP, 53141840 (Tokushu) 11 December 1978 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991002196A1 (fr) * 1989-07-28 1991-02-21 Caterpillar Inc. Connexion d'interference entre un element chauffant et le corps d'une bougie de prechauffage
WO2001069135A1 (fr) * 2000-03-14 2001-09-20 Robert Bosch Gmbh Bougie crayon de prechauffage pour un moteur a combustion interne
WO2005026619A1 (fr) * 2003-08-28 2005-03-24 Robert Bosch Gmbh Bougie de prechauffage a element de contact specialement encastre

Also Published As

Publication number Publication date
ES289122U (es) 1986-02-16
DE8427789U1 (de) 1986-01-23
JPS62500258A (ja) 1987-01-29
EP0194292A1 (fr) 1986-09-17
ES289122Y (es) 1986-10-01

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