EP0234345B1 - Abreisszündkerze - Google Patents

Abreisszündkerze Download PDF

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Publication number
EP0234345B1
EP0234345B1 EP87101451A EP87101451A EP0234345B1 EP 0234345 B1 EP0234345 B1 EP 0234345B1 EP 87101451 A EP87101451 A EP 87101451A EP 87101451 A EP87101451 A EP 87101451A EP 0234345 B1 EP0234345 B1 EP 0234345B1
Authority
EP
European Patent Office
Prior art keywords
armature
spark plug
make
housing
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
Application number
EP87101451A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0234345A1 (de
Inventor
Max Pasbrig
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.)
Lacrex Brevetti SA
Original Assignee
Lacrex Brevetti SA
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 Lacrex Brevetti SA filed Critical Lacrex Brevetti SA
Priority to AT87101451T priority Critical patent/ATE48341T1/de
Publication of EP0234345A1 publication Critical patent/EP0234345A1/de
Application granted granted Critical
Publication of EP0234345B1 publication Critical patent/EP0234345B1/de
Expired 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
    • 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
    • H01T13/42—Sparking plugs structurally combined with other devices with magnetic spark generators

Definitions

  • the invention relates to a tear-off spark plug according to the preamble of patent claim 1.
  • the leaf springs are arranged in the magnetic core in such a way that strong vibrations occur at the attachment point when the electrodes on the leaf springs are torn apart.
  • the band springs are thus constantly subjected to heavy stress at the same point, which results in rapid material fatigue and an early break.
  • the cavity in the lower housing part is designed in such a way that the magnetic coil with the magnetic core and the leaf springs with the armature are arranged in such a way that the magnetic coil can overheat and soot the magnetic core lower part and the armature. which affects the function.
  • the invention is therefore based on the object of providing a tear-off spark plug in which the magnetic core with its cavity and the armature movable in the transverse direction to the spark plug axis are designed to be more functional, the tear-off movements can be carried out without wear and the heating and sooting are reduced.
  • the magnetic core in the armature direction has a mushroom-shaped thickening with conical side faces and a cavity ensures a concentration of the magnetic effect in the armature region. Since the armature movable in the magnetic core cavity transverse to the compression pressure flow is arranged asymmetrically with respect to the axis of the magnetic core cavity, the compression pressure supports the tear-off movements. Because of the course of the field line, in addition to the attraction effect on the armature extending beyond the magnetic core, there is also a repulsion effect. The tear-off sequence can also be accelerated and carried out more precisely, and there are no material deformations during the tear-off movements on the long rod to which the anchor is attached.
  • the part of the armature arranged on the spring rod protruding into the explosion space is provided with a recess directed towards the axis, the attached and thus movable electrode is already subjected to the explosion pressure in the tear-off direction, which relieves the required magnetic force.
  • the armature and the electrodes can be easily replaced in this arrangement because they protrude from the candle housing.
  • the sooting of the armature and overheating are reduced by the arrangement of a cavity in the magnetic core provided with step-like extensions and by the free space with ventilation openings. This is of particular advantage if the tear-off spark plug is not used in piston-type internal combustion engines, but rather as an igniter in a wide variety of areas.
  • the insulation provided in the upper part of the tear-off spark plug can also be omitted, which enables a smaller design.
  • the spring rod can also be welded into the upper part of the magnetic core if there is a direct power supply through high voltage.
  • the tear-off spark plug shown comprises an essentially cylindrical housing 1 with a polygonal profile 3 made of metallic but non-magnetizable material that narrows towards the screw-in side, and a threaded part 2 that is screwed into the cylinder head (not shown) of an internal combustion engine or into an ignition system is, and ends in a one-sided approach 27 for fastening the one electrode 25.
  • the wall of the housing 1 is from the bottom and through the upper ventilation openings 7, 7 ', which open into the free spaces 4, 8 between the magnet coil 5 and the housing 1.
  • the housing 1 is provided at its end facing away from the threaded part with a thread 11 for a closure part 22 with a thread, in which a recess 32 for the ignition cable 29 and a plate 14 for the electrical connection 13 with insulations 31, 12 are arranged.
  • a magnetic coil 5 is provided at its upper end with insulating plates 30 and arranged at a distance from the inner wall of the housing, and a magnetic core 6, which is provided in the armature direction with a mushroom-shaped reinforcement 9 with a conical tip 10 that extends is supported on a seal 23.
  • the magnetic core 6 has a central cavity 1 with step-like extensions 15 ', 16.
  • the spring rod has an electrical connection on its head part 20.
  • An electrode 24 is arranged in the recess 26.
  • the armature 18 and the electrodes 24, 25 are interchangeably provided. The latter have their heads turned towards each other and are in contact at rest.
  • the electrode 24 has a bevel in longitudinal section, so that the explosion pressure (in the case of use in an internal combustion engine) finds an additional contact surface in order to support its lifting off from the electrode 25.
  • FIG. 4 shows a spark plug with an essentially cylindrical housing 1. This consists of a lower part 1 'with ventilation openings 7 which are arranged in the region of the lower housing part 1' which is narrowed towards the screwing-in side; a threaded part 2 'and a shoulder 27 arranged on one side with an electrode 25; and an upper part 1 "with ventilation openings 7 'in its flattened area.
  • the magnetic core has a mushroom-shaped reinforcement 9 'with a conical tip 10, a central cavity 15 with step-shaped extensions 15', 16 and a sealing ring 23.
  • the cavity 15 there is an armature 18 which extends beyond the magnetic core and is asymmetrical with respect to the axis of the cavity 16, attached to a spring rod 19 which is pressed or welded in the upper part of the magnetic core 6 is.
  • the electrodes 24, 25, which are interchangeably arranged on the armature 18 and on the extension 27, are in contact with their heads in the rest position.
  • the spring bar 19 can, at least in its upper end, which is conductively connected to the magnetic core 6, be angular, e.g. be square to improve the attachment and prevent rotation about its axis.
  • the lower housing part 1 'and the upper housing part 1 are connected by interlocking recesses - covered by a locking ring 36.
  • the insulation between the magnetic core 6 and the coil winding 5 can be dispensed with if a copper wire covered with ceramic or a specially anodized copper wire is used for the coil winding , one end 13 'of which is connected to the plate 14', the other end 13 '' of the magnetic core 6.
  • the spark plug works as follows: The voltage of a conventional battery is either stepped up or fed directly. Depending on the number of cylinders or devices to be operated, a corresponding number of thyristors are connected, which on the other hand are also connected to the spark plug.
  • An ignition distributor or timer with an ignition pulse generator controls the thyristors in such a way that, depending on the desired firing sequence, they emit the control pulses to the cylinders or apparatus.
  • the ignition current excites the electromagnet and also flows through the short-circuit path formed by the electrodes.
  • the magnetic field that builds up creates a magnetic effect in the armature region, the shape of the magnetic core extension ensuring a concentration of this magnetic effect.
  • a repulsive effect occurs due to the magnetic field line course between the magnetic core and armature.
  • the electrode heads are torn apart to form sparks; this interrupts the circuit, so that the magnetic field collapses again and the electrode heads can return to the contact position.
  • the ring 23 'isolates the magnetic core 6 from the housing 1, seals the free spaces 4, 8 from the outside and at the same time forms a stop or a limitation for the armature 18 when the electrodes 24, 25 are torn apart.
  • the housing can also have a different shape instead of a cylindrical one or consist of composite parts, with the inner parts then being adapted to the selected shape with the appropriate design.
  • the electrodes can also be attached or arranged differently.
  • the free spaces can also be completely or partially filled with insulating bodies; the ventilation openings can also be dispensed with.
  • another power generator can also be selected and the power supply can be arranged differently. If the magnetic core is placed under high voltage, the spring bar can be welded into the upper part of the magnetic core and the upper insulation can be dispensed with.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Spark Plugs (AREA)
  • Thermally Insulated Containers For Foods (AREA)
  • Cookers (AREA)
EP87101451A 1986-02-18 1987-02-03 Abreisszündkerze Expired EP0234345B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87101451T ATE48341T1 (de) 1986-02-18 1987-02-03 Abreisszuendkerze.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH639/86A CH669691A5 (ja) 1986-02-18 1986-02-18
CH639/86 1986-02-18

Publications (2)

Publication Number Publication Date
EP0234345A1 EP0234345A1 (de) 1987-09-02
EP0234345B1 true EP0234345B1 (de) 1989-11-29

Family

ID=4191697

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87101451A Expired EP0234345B1 (de) 1986-02-18 1987-02-03 Abreisszündkerze

Country Status (12)

Country Link
US (1) US4850316A (ja)
EP (1) EP0234345B1 (ja)
JP (1) JPS6324578A (ja)
KR (1) KR870008418A (ja)
CN (1) CN1003151B (ja)
AT (1) ATE48341T1 (ja)
CA (1) CA1300675C (ja)
CH (1) CH669691A5 (ja)
DD (1) DD259940A1 (ja)
DE (2) DE3761069D1 (ja)
IL (1) IL81514A0 (ja)
IN (1) IN169207B (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5555862A (en) * 1994-07-19 1996-09-17 Cummins Engine Company, Inc. Spark plug including magnetic field producing means for generating a variable length arc
US5619959A (en) * 1994-07-19 1997-04-15 Cummins Engine Company, Inc. Spark plug including magnetic field producing means for generating a variable length arc
TW200711244A (en) * 2005-09-02 2007-03-16 chen-jun Liao Spark plug
DE102006043593B3 (de) * 2006-09-16 2008-04-10 Multitorch Gmbh Zündkerze
JP4818873B2 (ja) * 2006-10-25 2011-11-16 東洋電装株式会社 点火プラグ一体型多機能点火装置
CN101916966B (zh) * 2010-07-01 2012-07-25 宁波大叶园林设备有限公司 有活动受电极和微动放电极的内燃机用点火装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE226382C (ja) *
DE218595C (ja) *
DE204545C (ja) *
FR385981A (fr) * 1908-01-06 1908-06-01 Carl Ebner Bougie à rupteur électro-magnétique pour moteurs à explosion
FR390554A (fr) * 1908-05-25 1908-10-09 Ernst Eisemann & Cie Bougie d'allumage à rupture pour moteurs à explosion
US1038701A (en) * 1911-02-21 1912-09-17 William Sibert Witter Spark-plug.
US3693607A (en) * 1971-01-11 1972-09-26 Max Pasbrig Make-and-break spark plug
US3908146A (en) * 1972-12-11 1975-09-23 Lacrex Brevetti Sa Break ignition plug and ignition device
DE2653226A1 (de) * 1976-11-23 1978-05-24 Max Pasbrig Abreisszuendkerze
DE2951848C2 (de) * 1979-12-21 1984-11-08 Lacrex Brevetti S.A., Orselina Abreißzündkerze

Also Published As

Publication number Publication date
DD259940A1 (de) 1988-09-07
IN169207B (ja) 1991-09-14
JPS6324578A (ja) 1988-02-01
CN87100762A (zh) 1987-10-14
DE8701819U1 (de) 1987-04-30
CA1300675C (en) 1992-05-12
CH669691A5 (ja) 1989-03-31
CN1003151B (zh) 1989-01-25
DE3761069D1 (de) 1990-01-04
EP0234345A1 (de) 1987-09-02
KR870008418A (ko) 1987-09-26
IL81514A0 (en) 1987-09-16
ATE48341T1 (de) 1989-12-15
US4850316A (en) 1989-07-25

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