EP0139911B1 - Bougie d'allumage pour moteur à combustion interne - Google Patents

Bougie d'allumage pour moteur à combustion interne Download PDF

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Publication number
EP0139911B1
EP0139911B1 EP84109206A EP84109206A EP0139911B1 EP 0139911 B1 EP0139911 B1 EP 0139911B1 EP 84109206 A EP84109206 A EP 84109206A EP 84109206 A EP84109206 A EP 84109206A EP 0139911 B1 EP0139911 B1 EP 0139911B1
Authority
EP
European Patent Office
Prior art keywords
spark gap
capacitor
ignition
spark plug
insulating body
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
EP84109206A
Other languages
German (de)
English (en)
Other versions
EP0139911A1 (fr
Inventor
Werner Dr. Dipl.-Ing. Herden
Boye Dr. Dipl.-Phys. Saggau
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 EP0139911A1 publication Critical patent/EP0139911A1/fr
Application granted granted Critical
Publication of EP0139911B1 publication Critical patent/EP0139911B1/fr
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
    • H01T13/40—Sparking plugs structurally combined with other devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P13/00—Sparking plugs structurally combined with other parts of internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P3/00—Other installations
    • F02P3/06—Other installations having capacitive energy storage
    • F02P3/08—Layout of circuits
    • F02P3/0807—Closing the discharge circuit of the storage capacitor with electronic switching means
    • F02P3/0823—Closing the discharge circuit of the storage capacitor with electronic switching means with electronic tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P9/00—Electric spark ignition control, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P9/00—Electric spark ignition control, not otherwise provided for
    • F02P9/002—Control of spark intensity, intensifying, lengthening, suppression

Definitions

  • the invention relates to a spark plug according to the preamble of the main claim.
  • a spark plug lying in this direction is already known from DE-A-2 363 804, which is particularly distinguished in its application in that even lean fuel-air mixtures are ignited with sufficient certainty and a good energy yield of the fuel is obtained, that there is also a complete combustion of the fuel-air mixture and thus favorable exhaust gas values are obtained and that finally the ignition voltage pulses from conventional ignition systems can be used.
  • This is due to the fact that a particularly large amount of energy is converted in the breakdown phase of the initial phase of the ignition spark. The remaining residual energy then causes arcing and glow discharges, which have the disadvantageous effect that there is a strong burn-up on the electrodes of the spark gap and the service life of the spark plug is thereby considerably reduced.
  • a spark plug which has a metallic screen which has an inductive character.
  • the ignition is fed by a generator which charges a capacitor which, when a switch connected to the distributor is switched on, causes an ignition spark in the spark plug.
  • FIG. 1 shows the circuit representation of an ignition system with a spark plug designed according to the invention and
  • FIG. 2 shows the structural design of such a spark plug in a sectional view.
  • the ignition system shown in Figure 1 is intended for an internal combustion engine, not shown, of a motor vehicle, also not shown.
  • This ignition system shown as an example is fed from a direct current source 1, which can be the battery of the motor vehicle.
  • a line 2 leading to ground and a positive line via an operating switch (ignition switch) 3 leads from the negative pole 2.
  • the supply line 4 is the starting point for a circuit branch which first leads to the ground line 2 via the primary winding 5 of an ignition coil 6 and then via an interrupter switch 7.
  • the interrupter switch 7, which has a spark quench capacitor 8 in its shunt, can be opened at the ignition point by a cam 9 driven by the internal combustion engine, i. i.e., put it in its locked state.
  • the secondary winding 10 belonging to the ignition coil 6 is connected with the one winding end to the connection between the primary winding 5 and the circuit breaker 7 and with the other winding end to the high-voltage connection 11 belonging to the spark plug.
  • a transistor ignition system can also be used instead of the previously described interrupter ignition system.
  • the connection section present between the interference suppression resistor 12 and the capacitor 13 is the starting point for a cable run which is connected to ground via a spark gap 15.
  • the spark gap 14 is assigned a shunt path 16, which should have an inductive component 17.
  • 18 denotes an ohmic resistance, which can be formed by the wire resistance of the inductive component 17 and / or by an additional circuit element inserted into the shunt path.
  • the interference suppressor 12, the capacitor 13, the spark gap 14, the spark gap 15 and the shunt path 16 with its inductive component 17 and its ohmic component 18 are combined to form a unit which can be screwed into the cylinder housing of the internal combustion engine in a conventional manner.
  • the high-voltage connection 11 is formed by a screw bolt 20 which is firmly seated in a first insulating body 19 and projects with a portion thereof, to which the interference suppressor 12 is connected within the insulating body 19.
  • the interference suppressor 12 has a connection at its one connection to the high-voltage connection 11 and at its other connection to the first section 21 of a central electrode 22.
  • the first insulating body 19 is approximately cylindrical in shape, the imaginary longitudinal central axis of the bolt 20 forming the high-voltage connection 11, the imaginary longitudinal central axis of the pin-shaped suppression resistor 12 and the imaginary longitudinal central axis of the likewise pin-shaped Section 21 of the center electrode 22 approximately coincide with the imaginary longitudinal center axis of the insulating body 19.
  • the end of the insulating body 19 facing away from the high-voltage connection 11 is seated on a metallic annular disk 24 which concentrically and at a distance surrounds a metal disk 25, the annular disk 24 forming the spark gap 15 with the disk 25.
  • the disk 25 is inserted electrically and mechanically between the end of the first section 21 of the center electrode 22 facing away from the high-voltage connection 11 and the end of a second section 26 of the center electrode 22.
  • the other end face of the second section 26 of the center electrode 22 is supported on one connection of the capacitor 13.
  • the second section 26 of the center electrode 22 is firmly anchored in a U-shaped insulating body 27 such that it projects with a section into the cavity of this U-shaped insulating body 27.
  • the open end face of the U-shaped insulating body 27 is supported on the annular disk 24, whereas the opposite end face of this insulating body 27 is seated on one connection side of the capacitor 13.
  • the insulating body 27 and the capacitor 13 are received in an adapted recess, which is located in a further insulating body 28.
  • the insulating body 28 also has a cylindrical shape which, however, tapers stepwise in diameter as the distance from the high-voltage connection 11 increases.
  • the imaginary longitudinal center axis of the pin-shaped second section 26 of the center electrode 22, the imaginary longitudinal center axis of the capacitor 13 and the imaginary longitudinal center axis of a third section 29 of the center electrode 22 coincide with the imaginary longitudinal center axis of the further insulating body 28.
  • the third section which is firmly seated in the further insulating body 28, has an electrical connection on one end face to the connection of the capacitor 13 facing away from the high-voltage connection 11, whereas the other end face of this section 29 protrudes from the further insulating body 28.
  • This protruding end forms the ignition spark gap 14 with a horn-shaped counter electrode 30.
  • the horn-shaped counter electrode 30 projects from the end of a sleeve-shaped metal housing 31 facing away from the high-voltage connection 11, which encloses the further insulating body 28 and the foot of the first insulating body 19 so that the individual parts the spark plug are held tightly together.
  • a spiral 32 made of electrically conductive material and extending between the metal housing 31 and the third section 29 of the center electrode 22 is intended to form the shunt path 16 as an example, the arrangement being chosen such that an inductive component 17 and an ohmic component 18 result.
  • the discharge circuit consisting of elements 13 to 15, must be designed according to maximum frequency considerations, i. that is, it has the lowest possible inductance and also a low ohmic resistance.
  • the ignition system just described has the following mode of operation with the spark plug according to the invention:
  • the ignition system is functional.
  • the current conducted through the primary winding is interrupted and a high voltage pulse is induced in the secondary winding 10 and reaches the high voltage connection 11.
  • the capacitor 13 is charged via the interference suppression resistor 12 and the shunt path 16 until the electrical breakdown of the spark gap 15.
  • This breakdown generates an ignition spark at the spark gap 14 because the inductive component 17 in connection with the ohmic component is generated in the shunt path 18 is chosen so that the time constant resulting therefrom initially does not allow a substantial increase in current. Only when the energy is converted to such an extent that arcing or glow discharges occur at the spark gap 14 does the shunt path 16 become effective in the sense that its conductivity increases until the spark gap 14 is short-circuited.
  • the ignition system is also functional if the circuit position of the capacitor 13 and the circuit position of the spark gap 15 are interchanged.
  • the illustrated ignition system has the advantage that, after conversion of the main energy to the spark gap 14, residual energy subsequently supplied and thus causing arcing or glow discharges can flow off via the spark gap 15.

Landscapes

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

Claims (1)

  1. Bougie d'allumage pour moteur à combustion interne, qui est formé d'un tronçon d'étincelle d'allumage (14) émergeant dans la chambre de combustion du moteur à combustion interne, d'un condensateur (13) déchargeable par le tronçon d'étincelle d'allumage (14), ainsi que d'un tronçon de pré- étincelage (15) qui contrôle la tension de condensateur et provoquant la décharge du condensateur lors de la rupture électrique, caractérisé en ce qu'un tronçon de dérivation est branché en parallèle du tronçon d'étincelle d'allumage (14), avec une composante inductive (17), que le tronçon de dérivation (16) forme avec le condensateur (13) un franchement en série et que le tronçon de pré-étincelage (15) du franchement en série est branché en parallèle, faisant que des signaux à haute tension peuvent être amenés à la liaison existant entre le tronçon de pré-étincelage (15) et condensateur (13).
EP84109206A 1983-09-20 1984-08-03 Bougie d'allumage pour moteur à combustion interne Expired EP0139911B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3333891 1983-09-20
DE19833333891 DE3333891A1 (de) 1983-09-20 1983-09-20 Zuendkerze fuer brennkraftmaschinen

Publications (2)

Publication Number Publication Date
EP0139911A1 EP0139911A1 (fr) 1985-05-08
EP0139911B1 true EP0139911B1 (fr) 1988-07-20

Family

ID=6209550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84109206A Expired EP0139911B1 (fr) 1983-09-20 1984-08-03 Bougie d'allumage pour moteur à combustion interne

Country Status (4)

Country Link
US (1) US4636690A (fr)
EP (1) EP0139911B1 (fr)
JP (1) JPS6077384A (fr)
DE (2) DE3333891A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2267125A (en) * 1992-05-13 1993-11-24 Dawson Royalties Ltd I.c.engine spark ignition circuit.
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
US6559376B2 (en) 1996-09-30 2003-05-06 Nology Engineering, Inc. Combustion initiation device and method for tuning a combustion initiation device
US6035838A (en) * 1998-04-20 2000-03-14 Cummins Engine Company, Inc. Controlled energy ignition system for an internal combustion engine
US6374816B1 (en) 2001-04-23 2002-04-23 Omnitek Engineering Corporation Apparatus and method for combustion initiation
US7036494B1 (en) * 2005-10-21 2006-05-02 Chih-Yu Hsieh Ignition enhancement device for enhancing ignition efficiency of car engine
FR2893455B1 (fr) * 2005-11-14 2007-12-14 Renault Sas Bougie d'allumage pour moteur a combustion interne
US7735460B2 (en) * 2008-02-01 2010-06-15 Leonard Bloom Method and apparatus for operating standard gasoline-driven engines with a readily-available non-volatile fuel, thereby obviating the use of gasoline
FR2928420B1 (fr) * 2008-03-06 2010-12-24 Peugeot Citroen Automobiles Sa Procede d'allumage pour moteur a combustion.
JP5064587B2 (ja) * 2010-08-17 2012-10-31 日本特殊陶業株式会社 高周波プラズマスパークプラグ
JP6359575B2 (ja) * 2016-02-15 2018-07-18 日本特殊陶業株式会社 スパークプラグ

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2900575A (en) * 1959-08-18 Electric ignition systems
US2988662A (en) * 1961-06-13 Spark plug with improved auxiliary spark gap
GB709296A (en) * 1950-10-26 1954-05-19 Csf Improvements in sparking plugs
US3124718A (en) * 1960-01-12 1964-03-10 Combination spark
US3030549A (en) * 1960-03-07 1962-04-17 Gen Motors Corp Ignition system
FR1295473A (fr) * 1961-04-25 1962-06-08 Isodio Dispositif d'antiparasitage pour moteurs à explosions
FR1297896A (fr) * 1961-05-26 1962-07-06 Comp Generale Electricite Perfectionnements aux bougies antiparasites
FR1307681A (fr) * 1961-12-07 1962-10-26 Lodge Plugs Ltd Perfectionnements aux systèmes d'allumage électrique
GB994525A (en) * 1962-12-06 1965-06-10 Gen Motors Ltd Spark plugs
US3353052A (en) * 1964-07-15 1967-11-14 George H Barry Spark plug having an auxiliary series spark gap in parallel with the main spark gap
DE2363804A1 (de) * 1973-12-21 1975-06-26 Uwe Holtin Kondensatorzuendkerze
DE2810159C3 (de) * 1978-03-09 1984-11-08 Bloss, Werner H., Prof. Dr.-Ing., 7065 Winterbach Einrichtung zur Zündung brennfähiger Gemische

Also Published As

Publication number Publication date
DE3333891A1 (de) 1985-04-04
DE3472865D1 (en) 1988-08-25
US4636690A (en) 1987-01-13
JPS6077384A (ja) 1985-05-01
EP0139911A1 (fr) 1985-05-08

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