EP1053579A1 - Bougie pour moteur a combustion interne - Google Patents

Bougie pour moteur a combustion interne

Info

Publication number
EP1053579A1
EP1053579A1 EP99932622A EP99932622A EP1053579A1 EP 1053579 A1 EP1053579 A1 EP 1053579A1 EP 99932622 A EP99932622 A EP 99932622A EP 99932622 A EP99932622 A EP 99932622A EP 1053579 A1 EP1053579 A1 EP 1053579A1
Authority
EP
European Patent Office
Prior art keywords
resistor
spark plug
spark
temperature
resistant
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.)
Withdrawn
Application number
EP99932622A
Other languages
German (de)
English (en)
Inventor
Werner Herden
Rudolf Pollner
Thomas Brinz
Ulrich Eisele
Andreas Niegel
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 EP1053579A1 publication Critical patent/EP1053579A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T13/00—Sparking plugs
    • H01T13/40—Sparking plugs structurally combined with other devices

Definitions

  • the invention is based on a spark plug as it is already known from DE 196 23 989 AI. Here is one
  • Spark plug described which has a tubular metallic housing in which an insulator is embedded, in which a rod-shaped inner conductor arrangement is arranged.
  • the inner conductor arrangement shown and described here consists of a connecting bolt, a current-limiting resistor, a coated contact pin and a nail-shaped platinum center electrode.
  • the erosion resistance consists of a conductive material, which is usually introduced into the insulator as a potting compound.
  • at least two, preferably four, ground electrodes are attached to the housing and are bent toward the center electrode.
  • the spark plug according to the invention has the advantage over the known spark plugs that the cylinder capacity is reduced by changing the combustion resistance in such a way that electrically conductive windings form the combustion resistance on an insulating ceramic carrier. With a lower cylinder capacity, the risk of digging into the isolator is reduced because of the Reducing the spark plug capacity reduced the energy conversion at the moment of the breakthrough phase of the spark.
  • FIG. 1 shows the end of the spark plug according to the invention with a resistance package in a sectional view
  • FIG. 2 shows a second exemplary embodiment of the spark plug on the combustion chamber in a sectional view
  • FIG. 3 shows the wound wire resistance
  • FIG. 4 shows a coiled one
  • spark plug The basic structure of a spark plug is already sufficiently known from DE 196 23 989 or, for example, from DE-OS 44 31 143, so that it will not be explained again here.
  • FIG. 1 shows the end of a first exemplary embodiment with improved spark plug capacity on the combustion chamber side.
  • a metallic tubular housing 10 is a metallic tubular housing 10
  • Insulator 11 arranged, wherein the rotationally symmetrical axes of the housing 10 and the insulator 11 are congruent.
  • a contact pin 12, a burn-up resistor 13, a conductive contact panate 14 and a center electrode 15 are embedded in the insulator 11.
  • the erosion resistance 13 is a high-temperature resistant resistor, the structure of which can be seen in FIG. 3.
  • the center electrode is formed by a platinum pin, which absorbs relatively little heat from the combustion chamber due to its small end face. The consequence of this is that no appreciable amounts of heat have to be dissipated via the inner conductor arrangement, so that with this type of candle the good heat-conducting metallic contact pin can be replaced by a poorly heat-conducting advanced burn-up resistor.
  • FIG. 3 shows the temperature-resistant resistor as a wound wire resistor 30, a resistor wire 32 being wound on a ceramic carrier 31, which has an essentially cylindrical shape, which is then insulated by a glass cover 33.
  • Metal caps 34 are arranged at the two ends of the cylindrical ceramic carrier 31, which enable electrical contact to be made with the erosion resistance.
  • the glass cover 33 is applied to avoid oxidation processes at high temperatures and to fix the windings.
  • the glass is baked under protective gas or in a vacuum.
  • FIG. 2 also shows a section of a spark plug on the combustion chamber side with the same design
  • the erosion resistor 13 is designed here as a coiled thin-film resistor on a ceramic carrier.
  • the structure and mode of operation of this resistor as a coiled thin-film resistor will be explained in connection with FIG. 4.
  • the center electrode in this second exemplary embodiment consists of a cold-mounted, thick center electrode.
  • such a central electrode takes a lot of heat from the combustion chamber from FIG. 1 and can dissipate the absorbed heat via a heat-conducting axial connection into the candle interior. To this end, care must be taken to ensure that the advanced burn-up resistance has sufficient thermal conductivity. This requirement can be met by using aluminum nitrate (ALN) as the ceramic carrier of the resistor.
  • APN aluminum nitrate
  • FIG. 4 shows a possible design of the temperature-resistant resistor designed as a thin-film resistor.
  • the cylindrical ceramic carrier 31 is first coated, for example by sputtering in a vacuum. The structuring then takes place by evaporation of the thin layer using a laser. This embodiment is also covered with a temperature-resistant glass layer 33 for protection against oxidation. Likewise, the end faces of the cylindrical ceramic carrier are provided with a temperature-resistant metal cap 34, which ensure contact.
  • FIG. 5 shows an embodiment of the thin-film resistor, which can alternatively also be manufactured using planar technology.
  • a ceramic substrate plate is first coated over the entire surface, for example by vapor deposition or sputtering.
  • the meandering structures are then advantageously realized using photolithographic technology.
  • the required glass covering and contact metallization can be done using thick-film technology, so that in the end it is possible to separate the resistors without great effort.
  • the spark plug end sections shown in Figures 1 and 2 show the built-in high-temperature-resistant burn-up resistors.
  • the externally manufactured high-temperature-resistant erosion resistor 13 is after the Sintering the center electrode into the candle stone from behind in the insulator and contacting and sealing by means of glass panate 14 with the connecting bolt 12.
  • This energy comes from the part of the plug capacity that cannot be discharged via an interference suppressor and can be described in today's spark plugs approximately by the cylinder capacity C, which is formed between the inner conductor and the outer conductor, but is only effective along length 1 from the end of the erosion resistance to to the center electrode. This distance 1 is shown in FIGS. 1 and 2.
  • the energy E stored in the cylinder capacity C z is:
  • the relevant cylinder capacity is reduced, since the decisive length 1 can be significantly shortened due to the new design of the erosion resistance.
  • the solution according to the invention of reducing energy means that the critical threshold can no longer be exceeded that none Burying of spark in the slideway more occur.
  • wound wire resistors or wound metal thin-film resistors have a clearly inductive resistance component, which has an advantageous effect on suppressing the burn-off resistor. Therefore, suppression resistors in the spark plug connector can advantageously be dispensed with when using such advanced burn-up resistors in the spark plugs.
  • the cylinder capacity is usually calculated using the following formula:

Landscapes

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

Abstract

L'invention concerne une bougie comportant une enveloppe tubulaire métallique qui présente un ensemble conducteur intérieur qui reçoit une résistance de combustion résistant aux températures élevées. Cette résistance de combustion résistant aux températures élevées se présente soit sous la forme d'une résistance bobinée soit sous la forme d'une résistance à couche mince spiralée.
EP99932622A 1998-07-24 1999-05-05 Bougie pour moteur a combustion interne Withdrawn EP1053579A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19833316A DE19833316A1 (de) 1998-07-24 1998-07-24 Zündkerze für eine Brennkraftmaschine
DE19833316 1998-07-24
PCT/DE1999/001344 WO2000007270A1 (fr) 1998-07-24 1999-05-05 Bougie pour moteur a combustion interne

Publications (1)

Publication Number Publication Date
EP1053579A1 true EP1053579A1 (fr) 2000-11-22

Family

ID=7875152

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99932622A Withdrawn EP1053579A1 (fr) 1998-07-24 1999-05-05 Bougie pour moteur a combustion interne

Country Status (5)

Country Link
US (1) US6559578B1 (fr)
EP (1) EP1053579A1 (fr)
JP (1) JP2002521619A (fr)
DE (1) DE19833316A1 (fr)
WO (1) WO2000007270A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10004424C2 (de) * 2000-02-02 2003-10-23 Beru Ag Zündkerze
US8922102B2 (en) * 2006-05-12 2014-12-30 Enerpulse, Inc. Composite spark plug
US7443089B2 (en) * 2006-06-16 2008-10-28 Federal Mogul World Wide, Inc. Spark plug with tapered fired-in suppressor seal
US8049399B2 (en) 2006-07-21 2011-11-01 Enerpulse, Inc. High power discharge fuel ignitor
US8242672B2 (en) 2008-04-28 2012-08-14 Ngk Spark Plug Co., Ltd. Spark plug having a fixation assisting member for the insulator
JP4948515B2 (ja) * 2008-12-26 2012-06-06 日本特殊陶業株式会社 プラズマジェット点火プラグ
EP2807711A4 (fr) 2012-01-27 2015-10-07 Enerpulse Inc Bougie haute puissance à écartement demi-surface

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1013924B (de) * 1952-12-08 1957-08-14 Siemens Ag Zuendkerze bzw. Zuendstromverteiler mit Entstoerwiderstand fuer Brennkraftmaschinen
FR1302146A (fr) * 1961-09-28 1962-08-24 Bosch Gmbh Robert Résistance électrique, particulièrement résistance antiparasite pour bougies d'allumage et procédé de fabrication
DE1965294A1 (de) * 1969-12-29 1971-07-08 Champion Spark Plug Co Zuendvorrichtung fuer Brennkraftmaschinen
US3771006A (en) * 1972-02-14 1973-11-06 N Berry Ignition circuit radiation suppression structure
US3882341A (en) * 1974-01-24 1975-05-06 Champion Spark Plug Co Spark plug with inductive suppressor
US4029990A (en) * 1976-01-09 1977-06-14 Champion Spark Plug Company Spark plug construction
US4112330A (en) * 1977-05-20 1978-09-05 General Motors Corporation Metallized glass seal resistor compositions and resistor spark plugs
US4224554A (en) * 1978-05-20 1980-09-23 Ngk Spark Plug Co., Ltd. Spark plug having a low noise level
DE3347027A1 (de) * 1983-12-24 1985-07-04 Robert Bosch Gmbh, 7000 Stuttgart Zuendkerze fuer eine brennkraftmaschine
US5095242A (en) * 1990-07-24 1992-03-10 North American Philips Corporation Low radio interference spark plug
DE4431143B4 (de) 1994-09-01 2004-09-23 Robert Bosch Gmbh Zündkerze für eine Brennkraftmaschine
DE19623989C2 (de) * 1996-06-15 1998-07-30 Bosch Gmbh Robert Zündkerze für eine Brennkraftmaschine
DE19818214A1 (de) * 1998-04-24 1999-10-28 Bosch Gmbh Robert Zündkerze für eine Brennkraftmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0007270A1 *

Also Published As

Publication number Publication date
DE19833316A1 (de) 2000-01-27
JP2002521619A (ja) 2002-07-16
US6559578B1 (en) 2003-05-06
WO2000007270A1 (fr) 2000-02-10

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