EP1028506A1 - Bougie d'allumage - Google Patents

Bougie d'allumage Download PDF

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Publication number
EP1028506A1
EP1028506A1 EP99120736A EP99120736A EP1028506A1 EP 1028506 A1 EP1028506 A1 EP 1028506A1 EP 99120736 A EP99120736 A EP 99120736A EP 99120736 A EP99120736 A EP 99120736A EP 1028506 A1 EP1028506 A1 EP 1028506A1
Authority
EP
European Patent Office
Prior art keywords
ground electrode
electrode
spark plug
housing
insulator
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Withdrawn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
EP99120736A
Other languages
German (de)
English (en)
Inventor
Wener Herden
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 EP1028506A1 publication Critical patent/EP1028506A1/fr
Withdrawn legal-status Critical Current

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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
    • H01T13/32—Sparking plugs characterised by features of the electrodes or insulation characterised by features of the earthed electrode
    • 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
    • H01T13/52—Sparking plugs characterised by a discharge along a surface

Definitions

  • the present invention relates to a spark plug with a Casing; an insulator foot attached to the housing; one through the insulator foot led center electrode, which the insulator tip protrudes; and one attached to the case Ground electrode.
  • the problem underlying the present invention consists generally in the fact that a safe flame nucleation at higher flow velocities and mixture inhomogeneities with conventional spark plugs and especially with certain ones Firing spaces (e.g. directed towards the spark plug Injector) can no longer be guaranteed.
  • a radial, i.e. perpendicular to the axis of the spark plug and perpendicular to its electrode directed flow speed of 5m / s is the spark deflected by approx. 5 mm after 1 ms.
  • the inflammability of a spark is optimal if the flow velocity in the electrode area between 1 and 5 m / s, so that the spark does not break off and the The energy of the plasma ignites as large a volume as possible can.
  • spark plug according to the invention with the features of the claim 1 or 6 or 9 points to the known approaches the advantage of a safe ignition through optimal flame core formation in engine concepts with high Flow speeds in the combustion chamber is possible.
  • the spark plug has a ground strap as a ground electrode in which the shielding device is integrated. So with conventional Concepts only the earth strap can be modified.
  • the Shielding device on a cup shape being inside the cup a finger is provided as the ground electrode tip is.
  • An axial flow can thus be shielded in particular become.
  • the shielding device is can be screwed onto the ground electrode. This enables the spark plug to be adapted to the respective one Combustion chamber conditions or the respective engine type.
  • the shielding device is cylindrical to shield a radial Flow is formed.
  • the ground electrode is axially set back in relation to the center electrode, that they are a spark gap to the center electrode forms that protrudes at least partially over the insulator foot.
  • the ground electrode and the insulator foot are expedient designed cylindrical symmetry, so that an attacking radial flow the spark gap in the flow shadow side can shift.
  • the Ground electrode in its opposite the center electrode Area one or more towards the center electrode pointing fingers up.
  • the ground electrode is axially advanced over the center electrode and the insulator foot is axial with respect to the center electrode preferred.
  • the ground electrode and the insulator base are designed cylindrical symmetry, so that an attacking radial flow before the spark gap is shielded.
  • Fig. 1 shows a schematic representation of a spark plug as the first embodiment of the present invention in cross section.
  • the spark plug according to this first embodiment has a housing 60, an insulator base attached to the housing 60 20 and a center electrode guided through the insulator foot 20 10, which protrudes from the tip of the insulator.
  • a ground electrode 50 with a shielding device connected to the ground electrode 50 100 which is designed so that it is a spark gap F1 to the center electrode 10 and an axial Flow vp shields from the spark gap Fl.
  • the spark plug has a converted earth strap as Ground electrode in which the shielding device 100 is integrated wherein the shielding device 100 is a cup shape and with a finger 120 in the cup interior is provided as a ground electrode tip.
  • Fig. 2 shows a schematic representation of a spark plug as a second embodiment of the present invention in cross section.
  • the spark plug according to this second embodiment has also a housing 60 ', one attached to the housing 60' Insulator foot 20 'and one through the insulator foot 20' guided center electrode 10 ', which on the insulator tip survives.
  • a ground electrode 50' with a shielding device 200 connected to the ground electrode 50 ', which is designed in such a way that it forms a spark gap F1' to the center electrode 10 'and shields a radial flow v s from the spark gap F1'.
  • the cylindrical shielding device 200 can expediently be screwed onto the ground electrode 50 '.
  • Fig. 3 shows a schematic representation of a spark plug as a third embodiment of the present invention in cross section.
  • the spark plug according to this third embodiment has a housing 60 ′′, an insulator base attached to the housing 60 ′′ 20 '', a center electrode through the insulator foot 20 '' 10 '', which protrudes from the insulator tip and a ground electrode attached to the housing 60 '' 50 ''.
  • the ground electrode 50 '' is such axially reset relative to the center electrode 10 '' it forms a spark gap F1 ′′ to the center electrode 10 ′′, which is at least partially over the insulator foot 20 '' running.
  • the ground electrode 50 ′′ and the insulator foot 20 ′′ are designed to be cylinder-symmetrical, so that an attacking radial flow v s can shift the spark gap F1 ′′ into the flow shadow side. In other words, the spark jumps in the lee.
  • Fig. 4 shows a schematic representation of a spark plug as a fourth embodiment of the present invention in cross section.
  • This fourth embodiment corresponds to the third Execution example, apart from the fact that the ground electrode 50 '' 'in their opposite the central electrode 10' '' Area one or more to the center electrode 10 '' ' pointing finger 70 '' '. In this example too it is possible that the ground electrode 50 '' 'in axial Has slits running in the direction.
  • FIG. 5 shows a schematic illustration of a spark plug as a fifth embodiment of the present invention in cross section.
  • the spark plug according to this fifth embodiment has a housing 60 "", one attached to the housing 60 '' '' Insulator foot 20 '' '', one led through the insulator foot 20 '' '' Center electrode 10 '' '' and one on the housing 60 '' '' attached ground electrode 50 '' ''.
  • the ground electrode 50 '' '' is axially opposite the center electrode 10 '' '' forward and the isolator foot is opposite the center electrode 10 '' '' axially advanced.
  • a spark gap F1 '''' can be formed to the center electrode 10 '''', which at least partially runs over an inner surface of the advanced insulator foot 20 ''''.
  • the ground electrode 50 '''' and the insulator base 20 '''' are designed to be cylinder-symmetrical, so that an attacking radial flow v s is shielded from the spark gap F1 ''''.
  • the shape of the shielding device can match the respective Flow conditions in the combustion chamber can be adjusted.

Landscapes

  • Spark Plugs (AREA)
EP99120736A 1999-02-11 1999-10-20 Bougie d'allumage Withdrawn EP1028506A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999105555 DE19905555A1 (de) 1999-02-11 1999-02-11 Zündkerze
DE19905555 1999-02-11

Publications (1)

Publication Number Publication Date
EP1028506A1 true EP1028506A1 (fr) 2000-08-16

Family

ID=7897071

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99120736A Withdrawn EP1028506A1 (fr) 1999-02-11 1999-10-20 Bougie d'allumage

Country Status (3)

Country Link
EP (1) EP1028506A1 (fr)
JP (1) JP2000235885A (fr)
DE (1) DE19905555A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10227513C1 (de) * 2002-06-19 2003-12-11 Beru Ag Zündkerze
WO2016153868A1 (fr) * 2015-03-20 2016-09-29 Woodward, Inc. Système d'allumage blindé à capuchon
US9476347B2 (en) 2010-11-23 2016-10-25 Woodward, Inc. Controlled spark ignited flame kernel flow in fuel-fed prechambers
US9765682B2 (en) 2013-06-10 2017-09-19 Woodward, Inc. Multi-chamber igniter
US9840963B2 (en) 2015-03-20 2017-12-12 Woodward, Inc. Parallel prechamber ignition system
US9856848B2 (en) 2013-01-08 2018-01-02 Woodward, Inc. Quiescent chamber hot gas igniter
US9893497B2 (en) 2010-11-23 2018-02-13 Woodward, Inc. Controlled spark ignited flame kernel flow
US9890689B2 (en) 2015-10-29 2018-02-13 Woodward, Inc. Gaseous fuel combustion
US11674494B2 (en) 2010-11-23 2023-06-13 Woodward, Inc. Pre-chamber spark plug with tubular electrode and method of manufacturing same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1611856A (en) * 1923-04-02 1926-12-21 O A Lindstrom Spark plug
US1962669A (en) * 1931-08-12 1934-06-12 Jr Joseph W Parkin Spark plug
FR812777A (fr) * 1936-10-30 1937-05-18 Bougie d'allumage perfectionnée
US2120492A (en) * 1937-02-17 1938-06-14 Karl Werth Sparking plug
US4713574A (en) * 1985-10-07 1987-12-15 The United States Of America As Represented By The Secretary Of The Air Force Igniter electrode life control

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1611856A (en) * 1923-04-02 1926-12-21 O A Lindstrom Spark plug
US1962669A (en) * 1931-08-12 1934-06-12 Jr Joseph W Parkin Spark plug
FR812777A (fr) * 1936-10-30 1937-05-18 Bougie d'allumage perfectionnée
US2120492A (en) * 1937-02-17 1938-06-14 Karl Werth Sparking plug
US4713574A (en) * 1985-10-07 1987-12-15 The United States Of America As Represented By The Secretary Of The Air Force Igniter electrode life control

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10227513C1 (de) * 2002-06-19 2003-12-11 Beru Ag Zündkerze
DE10227513B9 (de) * 2002-06-19 2004-09-30 Beru Ag Zündkerze
US9893497B2 (en) 2010-11-23 2018-02-13 Woodward, Inc. Controlled spark ignited flame kernel flow
US9476347B2 (en) 2010-11-23 2016-10-25 Woodward, Inc. Controlled spark ignited flame kernel flow in fuel-fed prechambers
US10907532B2 (en) 2010-11-23 2021-02-02 Woodward. Inc. Controlled spark ignited flame kernel flow in fuel-fed prechambers
US11674494B2 (en) 2010-11-23 2023-06-13 Woodward, Inc. Pre-chamber spark plug with tubular electrode and method of manufacturing same
US9856848B2 (en) 2013-01-08 2018-01-02 Woodward, Inc. Quiescent chamber hot gas igniter
US10054102B2 (en) 2013-01-08 2018-08-21 Woodward, Inc. Quiescent chamber hot gas igniter
US9765682B2 (en) 2013-06-10 2017-09-19 Woodward, Inc. Multi-chamber igniter
US9653886B2 (en) 2015-03-20 2017-05-16 Woodward, Inc. Cap shielded ignition system
US9840963B2 (en) 2015-03-20 2017-12-12 Woodward, Inc. Parallel prechamber ignition system
US9843165B2 (en) 2015-03-20 2017-12-12 Woodward, Inc. Cap shielded ignition system
WO2016153868A1 (fr) * 2015-03-20 2016-09-29 Woodward, Inc. Système d'allumage blindé à capuchon
US9890689B2 (en) 2015-10-29 2018-02-13 Woodward, Inc. Gaseous fuel combustion

Also Published As

Publication number Publication date
DE19905555A1 (de) 2000-08-17
JP2000235885A (ja) 2000-08-29

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