EP2761710A1 - Verbesserte zündkerze - Google Patents
Verbesserte zündkerzeInfo
- Publication number
- EP2761710A1 EP2761710A1 EP12751279.6A EP12751279A EP2761710A1 EP 2761710 A1 EP2761710 A1 EP 2761710A1 EP 12751279 A EP12751279 A EP 12751279A EP 2761710 A1 EP2761710 A1 EP 2761710A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- diameter
- spark plug
- noble metal
- ground electrode
- electrode
- 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
Links
- 229910000510 noble metal Inorganic materials 0.000 claims abstract description 28
- 238000002485 combustion reaction Methods 0.000 claims abstract description 3
- 239000010970 precious metal Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
-
- 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
- H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
- H01T13/39—Selection of materials for electrodes
-
- 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
- H01T15/00—Circuits specially adapted for spark gaps, e.g. ignition circuits
Definitions
- the present invention relates to an improved spark plug in a so-called pin-to-pin arrangement with significantly improved
- Embodiments known In known spark plugs with a so-called roof electrode, in which the ground electrode is arranged in the axial direction of the spark plug above the center electrode, usually noble metal-containing pins, so-called pins, used to improve the service life of the spark plug. These precious metal pencils have very good corrosion and erosion resistance. By the opposing arrangement of the noble metal pins on the center electrode and the ground electrode also a very good ignition of the fuel mixture is ensured.
- the noble metal pins are usually cylindrical and designed such that a larger of the two
- Pin diameter is applied to the ground electrode and the smaller of the pin diameter is arranged at the center electrode.
- the diameters of the precious metal pins are the same size.
- single-filament coils are usually used, in which the center electrode is provided as a cathode. It has now been found that a greater wear on the center electrode than at the Ground electrode in a wear ratio of 1/3 to 2/3 is present.
- the noble metal pins are very expensive components of the spark plugs, it would be desirable to have electrodes which have the most uniform wear possible over the life of the spark plug.
- the spark plug according to the invention with the features of claim 1 has the advantage over that wear of noble metal pins on the center electrode and the ground electrode over the entire life of the
- Spark plug is the same. This results in optimal utilization of expensive precious metal materials in the precious metal pins and in particular a prolonged service life of the spark plugs.
- the noble metal pin has a larger diameter at the center electrode than the noble metal pin at the ground electrode. Furthermore, an optimal utilization of the precious metal is achieved according to the invention.
- tolerances with regard to overlapping of the electrodes can be compensated by the larger diameter of the center electrode.
- the diameter of the center electrode is between 1 to 1.5 times greater than the diameter of the ground electrode. By adhering to this size ratio, a particularly minimized wear between the two noble metal pins of the electrodes can be achieved. More preferably, the diameter of the center electrode and the
- Ground electrode at the front end portions of the noble metal pins in a range of 0.4 mm to 1, 5 mm, preferably between 0.4 mm and 0.9 mm.
- a ratio V of a diameter of the center electrode to a diameter of the ground electrode between 1.2, ⁇ V ⁇ 1, 4,
- the invention relates to an ignition device comprising a
- Figure 1 is a schematic, partially sectioned view of a
- the spark plug 1 comprises a ground electrode 2 in the form of a roof electrode and a center electrode 3. At the ground electrode 2, a noble metal pin 20 is arranged. At the center electrode 3, a noble metal pin 30 is also arranged. The two noble metal pins 20, 30 are arranged in an end face facing each other orientation (so-called pin-to-pin arrangement).
- the spark plug 1 further includes an insulator 4 and a
- the noble metal pin 20 of the ground electrode is arranged to the noble metal pin 30 of the center electrode 3 such that the center axes X and Y of the noble metal pins coincide. Furthermore, the noble metal pin 30 of the center electrode 3 has a diameter D1, which is greater than a diameter D2 of the noble metal pin 20 of the ground electrode 2.
- a diameter D1 of the center electrode 3 is 0.8 mm and a diameter D2 of the noble metal pin 20 of the ground electrode 3 is 0.6 mm.
- the diameter at the center electrode 3 is approximately 1.33 times greater than the diameter D2 at the ground electrode 2.
- the diameter D1 at the center electrode is 1.00 mm and the diameter D2 at the ground electrode is 0.8 mm, so that the diameter of the center electrode 3 is 1, 25 times the diameter D 2 of the ground electrode 2.
- the inventive measure of providing a noble metal pin 30 at the center electrode 3 with a larger diameter than at the ground electrode 2 in a pin-to-pin arrangement an improved life of the spark plug can be achieved.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Spark Plugs (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011083640A DE102011083640A1 (de) | 2011-09-28 | 2011-09-28 | Verbesserte Zündkerze |
PCT/EP2012/065279 WO2013045145A1 (de) | 2011-09-28 | 2012-08-03 | Verbesserte zündkerze |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2761710A1 true EP2761710A1 (de) | 2014-08-06 |
EP2761710B1 EP2761710B1 (de) | 2016-10-12 |
Family
ID=46754395
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12751279.6A Active EP2761710B1 (de) | 2011-09-28 | 2012-08-03 | Verbesserte zündkerze |
Country Status (5)
Country | Link |
---|---|
US (1) | US9391429B2 (de) |
EP (1) | EP2761710B1 (de) |
JP (1) | JP2014528145A (de) |
DE (1) | DE102011083640A1 (de) |
WO (1) | WO2013045145A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9525271B2 (en) * | 2013-04-17 | 2016-12-20 | Ngk Spark Plug Co., Ltd. | Spark plug |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05335066A (ja) | 1992-06-01 | 1993-12-17 | Nippondenso Co Ltd | 内燃機関用スパークプラグ |
DE19737614B4 (de) | 1996-08-29 | 2010-04-08 | DENSO CORPORATION, Kariya-shi | Zündkerze für ein Gerät zur Erfassung eines Ionenstroms, ohne daß ein impulsartiges Rauschen auf dem Ionenstrom erzeugt wird |
JP2000243536A (ja) | 1999-02-18 | 2000-09-08 | Ngk Spark Plug Co Ltd | スパークプラグ及び内燃機関用点火システム |
JP2002184551A (ja) * | 2000-10-03 | 2002-06-28 | Nippon Soken Inc | スパークプラグ及びそれを用いた点火装置 |
JP2006120649A (ja) | 2000-10-03 | 2006-05-11 | Nippon Soken Inc | スパークプラグ及びそれを用いた点火装置 |
JP2004006250A (ja) | 2002-04-10 | 2004-01-08 | Denso Corp | 内燃機関用スパークプラグ |
DE602004030401D1 (de) * | 2003-09-27 | 2011-01-20 | Ngk Spark Plug Co | Zündkerze |
JP4928596B2 (ja) | 2009-12-04 | 2012-05-09 | 日本特殊陶業株式会社 | スパークプラグ及びその製造方法 |
-
2011
- 2011-09-28 DE DE102011083640A patent/DE102011083640A1/de not_active Withdrawn
-
2012
- 2012-08-03 JP JP2014531147A patent/JP2014528145A/ja active Pending
- 2012-08-03 US US14/345,895 patent/US9391429B2/en active Active
- 2012-08-03 EP EP12751279.6A patent/EP2761710B1/de active Active
- 2012-08-03 WO PCT/EP2012/065279 patent/WO2013045145A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2013045145A1 * |
Also Published As
Publication number | Publication date |
---|---|
US9391429B2 (en) | 2016-07-12 |
DE102011083640A1 (de) | 2013-03-28 |
JP2014528145A (ja) | 2014-10-23 |
EP2761710B1 (de) | 2016-10-12 |
US20140320010A1 (en) | 2014-10-30 |
WO2013045145A1 (de) | 2013-04-04 |
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