WO2007031371A1 - Bougie-crayon de prechauffage - Google Patents

Bougie-crayon de prechauffage Download PDF

Info

Publication number
WO2007031371A1
WO2007031371A1 PCT/EP2006/065057 EP2006065057W WO2007031371A1 WO 2007031371 A1 WO2007031371 A1 WO 2007031371A1 EP 2006065057 W EP2006065057 W EP 2006065057W WO 2007031371 A1 WO2007031371 A1 WO 2007031371A1
Authority
WO
WIPO (PCT)
Prior art keywords
glow
glow plug
filler
tube
plug according
Prior art date
Application number
PCT/EP2006/065057
Other languages
German (de)
English (en)
Inventor
Simon Schmittinger
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 WO2007031371A1 publication Critical patent/WO2007031371A1/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 for arrangement in a chamber of an internal combustion engine. Specifically, the invention relates to a glow plug for arrangement in a pre-vortex or combustion chamber of an air-compressing, self-igniting internal combustion engine.
  • a glow plug with a glow tube wherein within the glow tube, a heating coil and a control coil connected to the heating coil is provided.
  • a stabilizer bar is provided which extends in a mounting stage from Anschlußpol to the glow tube tip and runs centrally through the helices.
  • the heating coil and the control coil are embedded in a filling material which is electrically insulating and has good thermal conductivity.
  • the heat conduction of the filler material filled into the glow tube after filling into the glow tube is still not sufficient.
  • the known from DE 199 07 229 C2 glow plug has the disadvantage that deformations of the glow tube occur by the hammering process in the production of the glow plug, which have a weakening of the material of the glow tube and an irregular surface of the glow tube result.
  • the hammering in the manufacture of the glow plug candle weakening of the coils occur, so that the life of the known glow plug is deteriorated.
  • the glow plug according to the invention with the features of claim 1 has the advantage that a reliable operation over the life of the glow plug is guaranteed.
  • no hammering process is required in the manufacture of the glow plug according to the invention, so that the outer contour of the pin can have a uniform shape.
  • the glow tube has improved strength, since the wall thickness of the glow tube can be kept constant and the voltages in the glow tube are reduced.
  • the inventively filled in the interior of the glow tube filler has the property that it is sealed. A compression of the filler by hammering or the like is therefore not necessary, since the dense filler already ensures good thermal conductivity between the heating coil and the glow tube.
  • the heating behavior of the glow plug in particular the speed of heating, can be positively influenced and Specify targeted.
  • the compacting of the filling material to form the dense filler takes place without mechanical action from the outside.
  • the filler may be a high temperature resistant, at least substantially electrically insulating and thermally conductive liquid or a corresponding solid. Furthermore, viscous liquids, in particular gel-like or viscous materials, with the properties mentioned are suitable for the formation of the filler.
  • the filler may also be formed by a combination of different materials.
  • the filler may comprise a plurality of ceramic particles incorporated in a liquid, gel or other viscous liquid. The ceramic particles can be produced for example by grinding a ceramic material. With correspondingly finely ground ceramic particles, the filler may also be formed solely from the ceramic particles, which already result in filling a dense filler, which is already densely packed without further compression.
  • the filler is formed from a plastic
  • the plastic for filling into the glow tube is preferably provided so that it is sufficiently flowable to completely enclose the coil after a curing time and to wet the glow tube on the inside.
  • the interior is completely filled at least in the heating of the heating coil with the dense filler. This ensures the greatest possible dissipation of the heat generated by the heating coil to the glow tube.
  • a sealing element which closes a chamber distal end of the glow tube.
  • the sealant is particularly provided in a filler formed from a liquid, a gel or other viscous liquid to prevent leakage or vaporization of the filler.
  • the filler preferably has a boiling point that is higher than an operating temperature of the glow plug. The operating temperature results on the one hand by the annealing temperature and on the other by the continuous use temperature.
  • the liquid used is preferably selected so that its boiling point is greater than the maximum annealing temperature reached during operation of the glow plug, which is usually higher than the continuous use temperature.
  • an electrically conductive guide means is provided, which is arranged at a chamber-side end of the interior of the glow tube in order to prevent the Contact heating coil electrically with the glow tube.
  • the reliability of the glow plug is further improved.
  • Fig. 1 shows a preferred embodiment of a glow plug according to the invention in a schematic sectional view
  • Fig. 2 denoted in Fig. 1 with II section of the glow plug of the embodiment of the invention.
  • Fig. 1 shows an embodiment of a glow plug 1 in an axial, schematic sectional view.
  • the glow plug 1 can be configured in particular as a glow plug 1 for an air-compressing, self-igniting internal combustion engine.
  • a radiator 2 of the glow plug 1 protrudes in Vor- and swirl chamber engines in the chamber of the internal combustion engine and in direct injection engines in a combustion chamber of the engine.
  • the glow plug 1 according to the invention is also suitable for other applications.
  • the glow plug 1 has a metallic housing 3.
  • the housing 3 has a concentric through hole 4, wherein the radiator 2 is partially disposed within the housing 3 and is held by the housing 3.
  • the Radiator 2 of the glow plug 1 has a glow tube 5, which is connected in the region of a chamber-side opening 6, for example by a welded connection or press connection to the housing 3.
  • the radiator 2 has a control coil 7 and a heating coil 8, which are arranged inside the glow tube 5.
  • the control coil 7 is connected, for example, via a contact element 9 or directly to a connection bolt 10, which is screwed into a connection device 12 of the glow plug 1 at a chamber distal end 11 of the glow plug 1 or caulked thereto, wherein the connection device 12 for connecting an electrical supply line the glow plug 1 is used.
  • the connecting bolt 10 and the connecting device 12 are electrically insulated from the housing 3 via an electrically insulating sealing element 13, the sealing element 13 sealing the interior 15 of the housing 3 given through the through-hole 4 from the chamber-distal end 11.
  • the seal on the chamber-side opening 6 is given over the weld.
  • the metallic glow tube 5 is both electrically and mechanically connected to the housing 3, whereby the glow tube 5 of the screwed into the corresponding bore of the internal combustion engine glow plug 1 is grounded.
  • An interior 15 of the glow tube 5 is divided into a heating region 16 and a region 17.
  • the heating area 16 is located at the chamber-side end 18 of the glow plug 1.
  • the heating area 16 is characterized by the chamber-side end 18 in Interior 15 provided heating coil 8 defined.
  • the remaining interior space 15 defines the area 17.
  • the interior space 15 is completely filled with a dense filling agent 20.
  • the glow tube 5 is closed at its end provided within the housing 3 with an annular sealing element 21.
  • the sealing element 21 is provided in particular for a liquid, viscous or viscous filling agent 20, wherein it also prevents evaporation of the filler 20.
  • the sealing element 21 is likewise advantageous.
  • the sealing element 21 can also be dispensed with.
  • the filler 20 during filling can be free-flowing, flowable, liquid and / or ceramic.
  • the filler 20 may optionally cure after filling into the glow tube 5 or form a viscous filler 20.
  • FIG. 2 shows the detail designated II in FIG. 1 in a detailed, schematic sectional illustration. Already described elements are provided in FIG. 2 with the same reference numerals, whereby a repetitive description is unnecessary.
  • a tip 22 of the radiator 2 is formed at the chamber-side end 18 of the glow tube 5.
  • the tip 22 On the side of the interior 15, the tip 22 has an annular recess 23, so that the tip 22 of the glow tube 5 is formed dome-shaped towards the interior 15.
  • the heating coil 8 is welded in the region of the trough 23 with the tip 22 by WIK, laser or plasma welding.
  • the annular recess 23 is produced by welding a helical pin to the glow tube 5. Besides, this is in this
  • an electrically conductive guide means 26 is provided which touches a part of the heating coil 8 and on the other hand an inner wall 27 and the trough 23 of the glow tube 5, whereby a reliable electrical contact between the heating coil 8 and the tip 22 of the glow tube 5 is formed.
  • the guide means 26 may consist of either a solid or a liquid and a viscous material, wherein the guide means 26 may also consist of different materials. Even when breaking the heating coil 8 in the region of the tip 22, a reliable electrical connection with the glow tube 5 is further ensured via the guide means 26.
  • the filling agent 20 directly adjoins the conducting means 26, so that a reliable dissipation of the heat generated in the heating area 16 via the filling means 20 and the conducting means 26 to the glow tube 5 is ensured.
  • the conductive means 26 may be formed in particular of an electrically conductive ceramic or an electrically conductive plastic, which are also resistant to high temperatures. The formation of the conductive material 26 of a solid material is advantageous in combination with a liquid or viscous filler 20 to prevent unwanted shortening of the heating region 16 by an electrical short circuit between the individual turns of the heating coil 8.

Landscapes

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

Abstract

L'invention concerne une bougie-crayon de préchauffage (1) destinée à être placée dans une chambre d'un moteur à combustion interne. La bougie-crayon de préchauffage selon l'invention comprend un corps chauffant (2) qui présente un tube incandescent (5) dans lequel se trouve un filament chauffant (8). Ce faisant, l'intérieur (15) du tube incandescent (5) est rempli, au moins dans la zone de chauffage (16) du filament chauffant (8), d'une matière de remplissage dense (20). La matière de remplissage dense (20) garantit une conduction thermique fiable vers le tube incandescent (5) sans qu'une densification de la matière de remplissage (20) par martelage du tube incandescent (5) ne s'avère nécessaire.
PCT/EP2006/065057 2005-09-13 2006-08-04 Bougie-crayon de prechauffage WO2007031371A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005043415.0 2005-09-13
DE200510043415 DE102005043415A1 (de) 2005-09-13 2005-09-13 Glühstiftkerze

Publications (1)

Publication Number Publication Date
WO2007031371A1 true WO2007031371A1 (fr) 2007-03-22

Family

ID=37602752

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/065057 WO2007031371A1 (fr) 2005-09-13 2006-08-04 Bougie-crayon de prechauffage

Country Status (2)

Country Link
DE (1) DE102005043415A1 (fr)
WO (1) WO2007031371A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014137170A (ja) * 2013-01-16 2014-07-28 Ngk Spark Plug Co Ltd グロープラグの製造方法およびグロープラグ

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3021094A1 (fr) * 2014-05-13 2015-11-20 Bosch Gmbh Robert Electrode de prechauffage a joint d'isolation
EP3396249B1 (fr) * 2017-04-24 2019-10-09 NGK Spark Plug Co., Ltd. Bougie de préchauffage

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0353196A1 (fr) * 1988-07-28 1990-01-31 Champion Spark Plug Belgium S.A. Composition de cermet conducteur pour dispositifs d'allumage et de chauffage
EP0848209A2 (fr) * 1996-12-11 1998-06-17 Isuzu Ceramics Research Institute Co., Ltd. Elément chauffant céramique et son procédé de fabrication
EP0918195A2 (fr) * 1997-11-21 1999-05-26 Isuzu Ceramics Research Institute Co., Ltd. Gaine
EP1139693A2 (fr) * 2000-03-23 2001-10-04 Ngk Spark Plug Co., Ltd. Elément de chauffe en céramique ainsi que sa méthode de fabrication
DE19907229C2 (de) * 1999-02-19 2003-06-12 Beru Ag Stabglühkerze
DE10322129A1 (de) * 2003-05-16 2004-12-02 Robert Bosch Gmbh Glühstiftkerze mit besonders eingebettetem Kontaktelement

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0353196A1 (fr) * 1988-07-28 1990-01-31 Champion Spark Plug Belgium S.A. Composition de cermet conducteur pour dispositifs d'allumage et de chauffage
EP0848209A2 (fr) * 1996-12-11 1998-06-17 Isuzu Ceramics Research Institute Co., Ltd. Elément chauffant céramique et son procédé de fabrication
EP0918195A2 (fr) * 1997-11-21 1999-05-26 Isuzu Ceramics Research Institute Co., Ltd. Gaine
DE19907229C2 (de) * 1999-02-19 2003-06-12 Beru Ag Stabglühkerze
EP1139693A2 (fr) * 2000-03-23 2001-10-04 Ngk Spark Plug Co., Ltd. Elément de chauffe en céramique ainsi que sa méthode de fabrication
DE10322129A1 (de) * 2003-05-16 2004-12-02 Robert Bosch Gmbh Glühstiftkerze mit besonders eingebettetem Kontaktelement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014137170A (ja) * 2013-01-16 2014-07-28 Ngk Spark Plug Co Ltd グロープラグの製造方法およびグロープラグ

Also Published As

Publication number Publication date
DE102005043415A1 (de) 2007-03-15

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