EP0337216A2 - Bougie à incandescence pour chambre de combustion d'un moteur à compression d'air - Google Patents

Bougie à incandescence pour chambre de combustion d'un moteur à compression d'air Download PDF

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Publication number
EP0337216A2
EP0337216A2 EP89105742A EP89105742A EP0337216A2 EP 0337216 A2 EP0337216 A2 EP 0337216A2 EP 89105742 A EP89105742 A EP 89105742A EP 89105742 A EP89105742 A EP 89105742A EP 0337216 A2 EP0337216 A2 EP 0337216A2
Authority
EP
European Patent Office
Prior art keywords
flat material
resistance element
glow
glow plug
plug according
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
EP89105742A
Other languages
German (de)
English (en)
Other versions
EP0337216A3 (en
EP0337216B1 (fr
Inventor
Guglielmo Agradi
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0337216A2 publication Critical patent/EP0337216A2/fr
Publication of EP0337216A3 publication Critical patent/EP0337216A3/de
Application granted granted Critical
Publication of EP0337216B1 publication Critical patent/EP0337216B1/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • the invention relates to a glow plug for arrangement in the combustion chamber of an air-compressing internal combustion engine.
  • Such a glow plug has become known for example from DE-OS 27 46 496 and 27 44 624.
  • a section of the electrical resistance element facing the bottom of the glow element consists of a spiral made of flat material in the manner of a tightly wound clock spring, which is wound on a bolt and is provided with an intermediate, band-shaped insulation. This creates a self-heating solid cylinder, which has only a small outer surface and in which it is particularly difficult to remove heat from the center.
  • a section of the resistance heating element consists of a material with a high positive resistance temperature coefficient (PTC) in order to support rapid heating with subsequent limitation of the heating current.
  • PTC positive resistance temperature coefficient
  • German Patent 28 02 625 A similar design with helical heating wires is described in German Patent 28 02 625.
  • the object of the invention is to provide a glow plug of the type mentioned, which enables even shorter heating times.
  • the resistance element turns one of its large surfaces to the outside, which thus conducts the heat directly via the interposed investment to the outer surface of the glow element can give up.
  • the entire length of the resistance heating element is used largely uniformly for heat dissipation and the central regions are not disadvantaged.
  • conical design of the resistance element which thus has a spiral or spiral shape, it can be easily adapted to the circumstances.
  • the part of the resistance element facing the base can be attached to it directly by welding, so that the glow element forms the return conductor. It is also possible to vary the width of the flat material strip over the length of the resistance heating element in order to adapt it to the conditions due to the different conductor cross sections in the annealing temperature, for example in order to be able to heat areas with higher heat dissipation more. Between the extension of the largest cross-sectional dimension in the axial direction or transverse to this, any intermediate positions are possible in which the
  • Flat material takes an angle to the axis. In this case, for example, a spiral or spiral with conically rising or falling winding flanks would arise.
  • FIG. 1 shows a glow plug 11 with a plug housing 12 which can be screwed into the cylinder head of an internal combustion engine, for example a diesel engine, by means of a thread 13 via hexagon wrench surfaces 14.
  • the candle housing and the connection (not shown) to an electrical feed line can be designed in the usual way.
  • a sleeve-shaped glow element 15 projects into the combustion chamber and is closed at its free end by, for example, a spherical base 16.
  • An electrical resistance element 18, with which the glow element is heated, is located in it in an electrically insulating, highly heat-resistant investment compound 17.
  • the resistance element 18 consists of two sections, namely a wire resistance element 19, which consists of a round wire wound in the form of a cylindrical helix and forms the section of the resistance element 18 facing the plug housing 12. With a welded connection 22, a flat material resistance element 21 is connected directly to it, which consists of a band of resistance material which has the shape of a conically pulled-apart spiral. The largest cross-sectional dimensions a lie in the direction of the axis 24 of the resistance element and the glow plug. The part of the flat material resistance element 20 facing the base 16 is welded directly to the base, which forms the return conductor.
  • the flat material resistance element 20 tapers from the spiral diameter of the wire resistance element to a very small diameter in the area of the bottom connection 23 and thus adapts well to the likewise tapering shape of the glow element.
  • One of the resistor element sections preferably that facing the candle housing, can be made of a material with a high positive temperature coefficient of resistance (PTC).
  • PTC positive temperature coefficient of resistance
  • Fig. 3 shows an embodiment in which the flat material resistance heating element is also made from a band, but which has its larger cross-sectional dimensions a transverse to the axis 24.
  • This is also wound in the form of a conical or arcuately rounded spiral / helical body, which can also be adapted well to the final shape of the glow element.
  • the arrangement of the strips with a surface extension extending transversely to the axis has been advantageous because this results in a preferred heat emission at the end of the glow element.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Resistance Heating (AREA)
EP89105742A 1988-04-12 1989-04-01 Bougie à incandescence pour chambre de combustion d'un moteur à compression d'air Expired - Lifetime EP0337216B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3812138 1988-04-12
DE3812138A DE3812138A1 (de) 1988-04-12 1988-04-12 Gluehkerze zur anordnung im brennraum einer luftverdichtenden brennkraftmaschine

Publications (3)

Publication Number Publication Date
EP0337216A2 true EP0337216A2 (fr) 1989-10-18
EP0337216A3 EP0337216A3 (en) 1990-02-28
EP0337216B1 EP0337216B1 (fr) 1994-02-16

Family

ID=6351809

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89105742A Expired - Lifetime EP0337216B1 (fr) 1988-04-12 1989-04-01 Bougie à incandescence pour chambre de combustion d'un moteur à compression d'air

Country Status (2)

Country Link
EP (1) EP0337216B1 (fr)
DE (2) DE3812138A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3163171A1 (fr) * 2015-10-30 2017-05-03 NGK Spark Plug Co., Ltd. Bougie de préchauffage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1240855A (fr) * 1958-12-04 1960-09-09 Bosch Gmbh Robert Bougie de préchauffage pour moteur à combustion interne
FR2398969A1 (fr) * 1977-07-29 1979-02-23 Eyquem Bougie de chauffe pour demarrage de moteurs a allumage par compression
GB2106181A (en) * 1981-09-23 1983-04-07 Lucas Ind Plc Starting aids for internal combustion engines

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2746496A1 (de) * 1977-10-15 1979-04-26 Bosch Gmbh Robert Gluehstiftkerze fuer brennkraftmaschinen
DE2802625C3 (de) * 1978-01-21 1985-07-18 BERU Ruprecht GmbH & Co KG, 7140 Ludwigsburg Glühkerze
US4466391A (en) * 1981-09-23 1984-08-21 Lucas Industries Public Limited Company Starting aids for internal combustion engines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1240855A (fr) * 1958-12-04 1960-09-09 Bosch Gmbh Robert Bougie de préchauffage pour moteur à combustion interne
FR2398969A1 (fr) * 1977-07-29 1979-02-23 Eyquem Bougie de chauffe pour demarrage de moteurs a allumage par compression
GB2106181A (en) * 1981-09-23 1983-04-07 Lucas Ind Plc Starting aids for internal combustion engines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3163171A1 (fr) * 2015-10-30 2017-05-03 NGK Spark Plug Co., Ltd. Bougie de préchauffage

Also Published As

Publication number Publication date
EP0337216A3 (en) 1990-02-28
EP0337216B1 (fr) 1994-02-16
DE58906960D1 (de) 1994-03-24
DE3812138A1 (de) 1989-10-26

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