EP0448830B1 - Bougie à flamme pour un moteur à combustion à injection et compression d'air - Google Patents

Bougie à flamme pour un moteur à combustion à injection et compression d'air Download PDF

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Publication number
EP0448830B1
EP0448830B1 EP90125167A EP90125167A EP0448830B1 EP 0448830 B1 EP0448830 B1 EP 0448830B1 EP 90125167 A EP90125167 A EP 90125167A EP 90125167 A EP90125167 A EP 90125167A EP 0448830 B1 EP0448830 B1 EP 0448830B1
Authority
EP
European Patent Office
Prior art keywords
flame
tube
type heater
air
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.)
Expired - Lifetime
Application number
EP90125167A
Other languages
German (de)
English (en)
Other versions
EP0448830A2 (fr
EP0448830A3 (en
Inventor
Roland Klak
Friedrich Schmid
Peter Joppig
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.)
Daimler Benz AG
Mercedes Benz AG
Original Assignee
Daimler Benz AG
Mercedes Benz AG
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 Daimler Benz AG, Mercedes Benz AG filed Critical Daimler Benz AG
Publication of EP0448830A2 publication Critical patent/EP0448830A2/fr
Publication of EP0448830A3 publication Critical patent/EP0448830A3/de
Application granted granted Critical
Publication of EP0448830B1 publication Critical patent/EP0448830B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N19/00—Starting aids for combustion engines, not otherwise provided for
    • F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
    • F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
    • F02N19/06—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines by heating of combustion-air by flame generating means, e.g. flame glow-plugs
    • 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 flame glow plug for an air-compressing internal combustion engine according to the features specified in the preamble of claim 1.
  • the injection internal combustion engines operating on the compression-ignition principle require starting aids in order to raise the compression end temperatures to values above the compression-ignition temperature.
  • a flame glow plug is known as a starting aid during the starting process, which essentially consists of the candle housing with flame tube, the dosing insert, the heating element and the evaporator tube surrounding it.
  • the fuel supplied via the dosing insert gets into an annular space between the heating element and the evaporator tube and flows out there quickly.
  • the residence time of the outflowing fuel in the area of the heating element is short, so that the fuel does not evaporate fully and the ignition of the fuel is thus impaired.
  • a complex flame glow plug is known from FR-A-2 159 085, in which a helical swirl channel, which extends from the metering insert along the heating rod and is formed by a heating wire, is arranged. At a Such a build-up of soot and thus malfunctions of the combustion process cannot be avoided.
  • the invention has for its object to provide a flame glow plug by simple structural measures, through which fuel is processed so that it evaporates optimally and forms an ignitable mixture with the air entering the flame tube.
  • the flame glow plug 1 shown in FIG. 1 for an internal combustion engine with air compression and auto-ignition essentially consists of a candle housing 2 with a metering insert 3, a heating element 4 and an evaporator tube 6 surrounding it, forming an annular space 5.
  • the upper end of this evaporator tube 6 is arranged at a distance from the dosing insert 3, the candle housing 2 being drawn in in this area in such a way that it is sealingly connected to the heating element 4.
  • a screw-shaped swirl channel 7 is provided on the heating element 4 for the adhesive connection from the metering insert 3 to the annular space 5, through which the fuel enters the annular space 5 in a swirling manner.
  • the free end of the heating element 4 protrudes from the evaporator tube 6 and is shielded by a cylindrical flame tube 8 connected to the candle housing 2 and provided with through openings 9 for the inflow air.
  • annular air deflector 10 is arranged between the flame tube 8 and the heating element 4 at the level of the passage openings 9, as shown in FIGS. 2 to 5, which is connected by webs 11 fastened to the flame tube 8 below the passage openings 9 (Fig. 2 and 5) is supported.
  • the air flowing into the interior of the flame glow plug 1 is thus deflected upwards and downwards.
  • the flame tube 8 is not cylindrical, but star-shaped.
  • the air deflector 10 is firmly connected to the indentations 8a, while the projections 8b have the passage openings 9. Due to the special design of the flame tube 8, the air in the interior of the flame glow plug 1 is strongly swirled and an improvement in the fuel-air mixture is achieved outside this plug 1.
  • the free end of the flame tube 8 is drawn in in an arc shape in order to redirect the air or the fuel-air mixture there to the hot heating element 4, whereby the mixture formation is further improved and a higher burnout is achieved.
  • gills 12 are provided on the flame tube 8 above the passage openings 9 and direct the inflowing air between the flame tube 8 and the evaporator tube 6 and finally between the air deflector 10 and the heating element 4 in order to ventilate the interior there.
  • the air deflector 10 has a larger diameter than the evaporator tube 6.
  • the special designs with regard to the air inlets and the air deflector mean that the risk of soot or coke deposits between the heating element and the evaporator tube is eliminated due to the good ventilation.
  • the part of the heating rod 4 protruding from the evaporator tube 6 can be grooved, in the form of superimposed annular grooves 13 according to FIG. 6 or a helical annular groove 14 according to FIGS. 2, 3, 5, which results in an increase in surface area on the heating rod 4 resulting in an improvement in ignition.
  • FIG. 6 and 7 show air deflectors 10 which are each formed in the flame tube 8 by two superimposed slots 10a, 10b, which delimit an indented wall section 10c.
  • the air deflectors can be arranged in one or two rows.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spray-Type Burners (AREA)
  • Air-Conditioning For Vehicles (AREA)

Claims (8)

  1. Bougie à flamme pour un moteur à combustion à injection et compression d'air, avec un élément doseur, prévu pour l'alimentation en carburant, sur le corps de bougie, dans lequel un tube vaporiseur disposé à distance de l'élément doseur entoure à distance une tige chauffante en formant un espace intermédiaire annulaire, l'extrémité libre de la tige sortant du tube vaporiseur et étant isolée au moyen d'un tube à flamme, relié au corps de bougie, situé dans le trajet de l'écoulement de l'air d'aspiration s'écoulant dans le tube d'aspiration du moteur à combustion et pourvu d'orifices de passage, et avec une liaison de carburant, entre l'élément doseur et le tube vaporiseur, caractérisée en ce que la liaison de carburant est réalisée sous forme de canal à rotation (7), débouchant dans l'espace intermédiaire annulaire (5) et s'étendant hélicoïdalement sur la tige de chauffage (4).
  2. Bougie à flamme selon la revendication 1, caractérisée en ce que la tige de chauffage (4) est introduite par pressage dans la partie du corps de bougie (2) située au-dessus du tube vaporiseur (6)..
  3. Bougie à flamme selon la revendication 1 ou 2, caractérisée en ce qu'au moins un déflecteur d'air (10) est disposé entre la tige de chauffage (4) et le tube de flamme (8), au niveau des orifices de passage (9).
  4. Bougie à flamme selon la revendication 3, caractérisée en ce que le déflecteur d'air (10) est fixé par des nervures sur la partie de tube de flamme (8) située au-dessous des orifices de passage (9).
  5. Bougie à flamme selon la revendication 4, caractérisée en ce que le déflecteur d'air (10) est formé par emboutissage vers l'intérieur, à partir du tube de flamme, de sections de paroi (10) dont les délimitations supérieures et inférieures présentent des ouvertures.
  6. Bougie à flamme selon l'une des revendications précédentes, caractérisée en ce que la partie de tige de chauffage (4) sortant du tube vaporiseur (6) présente des gorges annulaires (13) superposées ou une gorge annulaire (14) hélicoïdale.
  7. Bougie à flamme selon l'une des revendications précédentes, caractérisée en ce que l'extrémité libre du tube de flamme est retroussée en forme d'arc orienté vers l'intérieur, sur la tige de chauffage (4), pour dévier le mélange air-carburant.
  8. Bougie à flamme selon l'une des revendications précédentes, caractérisée en ce que le tube de flamme (8) est pourvu au-dessus de ses orifices de passage (9) d'ouïes (12) déviant l'air dans l'espace formé par le tube de flamme et le tube vaporiseur.
EP90125167A 1990-03-29 1990-12-21 Bougie à flamme pour un moteur à combustion à injection et compression d'air Expired - Lifetime EP0448830B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4010093A DE4010093C1 (en) 1990-03-29 1990-03-29 Flame plug for IC-engine - has fuel metering insert and spaced evaporator tube to enclose heating bar
DE4010093 1990-03-29

Publications (3)

Publication Number Publication Date
EP0448830A2 EP0448830A2 (fr) 1991-10-02
EP0448830A3 EP0448830A3 (en) 1992-01-22
EP0448830B1 true EP0448830B1 (fr) 1994-03-02

Family

ID=6403331

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90125167A Expired - Lifetime EP0448830B1 (fr) 1990-03-29 1990-12-21 Bougie à flamme pour un moteur à combustion à injection et compression d'air

Country Status (4)

Country Link
US (1) US5182437A (fr)
EP (1) EP0448830B1 (fr)
DE (1) DE4010093C1 (fr)
RU (1) RU1838663C (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4142195C2 (de) * 1991-12-20 1993-10-14 Daimler Benz Ag Flammglühkerze für eine Dieselbrennkraftmaschine
DE4243965A1 (de) * 1992-12-23 1994-06-30 Beru Werk Ruprecht Gmbh Co A Flammglühanlage
DE4308543A1 (de) * 1993-03-17 1994-09-22 Man Nutzfahrzeuge Ag Flammstartanlage für Dieselmotore
DE19506711C1 (de) * 1995-02-25 1996-05-09 Beru Werk Ruprecht Gmbh Co A Flammglühkerze für eine Dieselbrennkraftmaschine
DE19629928A1 (de) * 1996-07-24 1998-01-29 Beru Werk Ruprecht Gmbh Co A Verfahren zum Betreiben einer Flammstartanlage für eine Brennkraftmaschine und Flammstartanlage für eine Brennkraftmaschine
US5860804A (en) * 1997-10-30 1999-01-19 Societe En Commandite Gaz Metropolitain Baffle ignitor assembly
US6076493A (en) * 1998-10-26 2000-06-20 Caterpillar Inc. Glow plug shield with thermal barrier coating and ignition catalyst
US8022337B2 (en) * 2008-06-10 2011-09-20 Locust, Usa, Inc. Ignitor plug assembly
AU2010265797A1 (en) * 2009-06-26 2012-01-19 Orbital Australia Pty Limited Combustion of low vapour-pressure fuels in spark ignition engines
US20110129393A1 (en) * 2009-12-02 2011-06-02 Lecea Oscar A Electrically-Heated Contact Fuel Vaporizer for a Hydrocarbon Reformer
DE102010027468A1 (de) * 2010-07-17 2012-01-19 Borgwarner Beru Systems Gmbh Glühkerze

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7133650U (de) * 1973-02-15 Bosch R Gmbh Flammgluhstiftkerze fur Diesel und Vielstoff Motoren
FR1577731A (fr) * 1967-10-18 1969-08-08
GB1247299A (en) * 1968-11-19 1971-09-22 Ise Electronics Corp Improvements in or relating to electric discharge display tubes
DE1903999C3 (de) * 1969-01-28 1975-01-09 Robert Bosch Gmbh, 7000 Stuttgart Flammglühkerze als Anlaßhilfe für Diesel- und Vielstoffmotoren
DE2031607A1 (de) * 1970-06-26 1971-12-30 Robert Bosch Gmbh, 7000 Stuttgart Flammglühkerze als Anlaßhilfe für Diesel- und Vielstoffmotoren
DE2112815A1 (de) * 1971-03-17 1972-10-05 Bosch Gmbh Robert Flammkerze als Anlasshilfe fuer Diesel- und Vielstoffmotoren
JPS5137085Y2 (fr) * 1971-04-20 1976-09-10
DE2201441A1 (de) * 1972-01-13 1973-07-19 Bosch Gmbh Robert Flammgluehkerze als anlasshilfe fuer diesel- und vielstoff-motoren
DE3136852A1 (de) * 1980-10-30 1982-06-16 Beru-Werk Albert Ruprecht Gmbh & Co Kg, 7140 Ludwigsburg Flammgluehkerze fuer brennkraftmaschinen
DE3301559C2 (de) * 1983-01-19 1986-06-12 Daimler-Benz Ag, 7000 Stuttgart Stabglühkerze für eine luftverdichtende Brennkraftmaschine
DE3309133A1 (de) * 1983-03-15 1984-09-20 Robert Bosch Gmbh, 7000 Stuttgart Flammgluehstiftkerze zum vorwaermen der ansaugluft von brennkraftmaschinen

Also Published As

Publication number Publication date
US5182437A (en) 1993-01-26
EP0448830A2 (fr) 1991-10-02
DE4010093C1 (en) 1991-08-14
EP0448830A3 (en) 1992-01-22
RU1838663C (ru) 1993-08-30

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