EP0591686B1 - Elément de connexion pour dispositif d'allumage - Google Patents

Elément de connexion pour dispositif d'allumage Download PDF

Info

Publication number
EP0591686B1
EP0591686B1 EP93114204A EP93114204A EP0591686B1 EP 0591686 B1 EP0591686 B1 EP 0591686B1 EP 93114204 A EP93114204 A EP 93114204A EP 93114204 A EP93114204 A EP 93114204A EP 0591686 B1 EP0591686 B1 EP 0591686B1
Authority
EP
European Patent Office
Prior art keywords
voltage
switching element
ignition coil
connecting part
voltage switching
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 - Lifetime
Application number
EP93114204A
Other languages
German (de)
English (en)
Other versions
EP0591686A2 (fr
EP0591686A3 (fr
Inventor
Walter Ing.(Grad.) Benedikt
Manfred Dipl.-Ing. Vogel
Werner Dr.Dipl.-Ing. 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 EP0591686A2 publication Critical patent/EP0591686A2/fr
Publication of EP0591686A3 publication Critical patent/EP0591686A3/fr
Application granted granted Critical
Publication of EP0591686B1 publication Critical patent/EP0591686B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01T13/02—Details
    • H01T13/04—Means providing electrical connection to sparking plugs

Definitions

  • the invention relates to a connecting part of an ignition system according to the preamble of patent claim 1.
  • a generic connecting part of an ignition system is known from DE-A-3 730 118.
  • the connecting part which is designed as a spark plug connector and is arranged between an ignition coil and a spark plug, has a high-voltage switching element in the form of a spark gap and, over its entire length, a capacitor with a large capacitance that enables high ignition energy.
  • Two electrodes protrude into the gas-filled interior of this gas discharge element, one of which is connected to ground potential and the other, with the interposition of an interference suppression resistor, to the output of an ignition coil.
  • This high-voltage switching element disadvantageously requires an ignition coil with a high output voltage; in the so-called breakdown phase, in which it becomes electrically conductive, the energy conversion results in an energy loss which leads to wear of the electrodes and limits the durability of the high-voltage switching element.
  • the disadvantages set out in the prior art are avoided and, with simple measures, a connecting part of an ignition system is realized, with which the ignition system has a low voltage level and which works with little energy loss without wear.
  • the high-voltage switching element is designed as a breakover diode and thus as a semiconductor component. This high-voltage switching element, which suddenly changes from an electrically blocking to an electrically conductive state when the breakover voltage is supplied by the ignition coil of the ignition system and applies a voltage jump to the downstream spark plug, makes it possible to influence the effects of shunts on the spark plug, which cause the formation of ignition sparks at the Electrodes of the spark plug make it difficult to largely eliminate them.
  • the prerequisite for this is that the voltage jump triggered by the high-voltage switching element reaches the ignition voltage required to form ignition sparks at the candle electrodes.
  • the voltage jump is a partial voltage of the breakover voltage, which depends on the component and the design of the high-voltage switching element.
  • the breakover voltage in turn is smaller than the output voltage of the ignition coil by a loss voltage.
  • the insulating housing of the connecting part is assigned an arrangement which only increases the capacitance of the area between the high-voltage switching element and the connecting element, which enables the use of a high-voltage switching element with a low breakover voltage and, as a result, also the use of an ignition coil with a low output voltage, so that the production costs of the ignition system are low.
  • the arrangement described is the connecting part of an ignition system for a multi-cylinder internal combustion engine, which is used as a spark plug connector due to its use and in which a separate ignition unit with an ignition coil and an integrated spark plug connector is used for each cylinder.
  • the single figure shows in cross section a section of a cylinder head 11 of an internal combustion engine with an ignition unit 12, not shown in more detail, the ignition coil 13 of which is only indicated and the one spark plug connector 14 with a spark plug 17 fastened in a plug shaft 16 of the cylinder head 11 connected is.
  • the spark plug connector 14 with a longitudinal axis 18 has a cylindrical structure in the basic form with an outer shell 19 made of silicone rubber, an injection molded thermosetting, outer cylindrical cylindrical insulating material housing 20, into which a pin-shaped connecting element 21 and an electrically connected in series Switched, with a cylindrical outer shape provided high-voltage switching element 22, which is designed as a breakover diode, are directly embedded.
  • the spark plug 17 is screwed in the usual way into a threaded bore 27 of the cylinder head 11 and it carries at the end, opposite the connecting pin 26, a ground electrode 28 and a center electrode 29, between which, when an ignition voltage is applied there is a sparkover at the center electrode 29.
  • a distribution of capacity with a pre-capacity consisting of the capacity of the ignition coil 13 and the adjoining part of the spark plug connector 14 in front of the installation location, results along the arrangement described in the direction of the energy flow from the ignition coil 13 to the spark plug 17
  • High-voltage switching element 22 with respect to earth potential and a post-capacitance with respect to earth potential consisting of the capacitance of the part of the spark plug connector 14 between the high-voltage switching element 22 and the spark plug 17, and the capacitance of the spark plug 17.
  • a hollow cylindrical metal cup 32 is attached to the spark plug connector 14 between the connecting element 23 and the connecting part 24 on an outer side 31 of the insulating material housing 20 and a metallic, hollow cylindrical shield 34 is attached to an outer jacket 33 of the casing 19.
  • the metal cup 32 is electrically connected to the high-voltage connection via the connection element 23 Ignition coil 13 connected and the metallic screen 34, via externally attached to the screen 34 resilient tabs 36 in frictional engagement and in electrical connection with the cylinder head 11 lying at ground potential.
  • the screen 34 can also have a screen voltage, the amount of which between that of the output voltage the ignition coil 13 and the earth potential and the screen 34 can be fastened together with the ignition coil 13 via fastening elements to the cylinder head 11 which is at earth potential.
  • a capacitance is thus formed between the metal cup 32 and the screen 34, with a part of the casing 19 as a dielectric. This capacitance is greater, the greater the amount of shield voltage and the smaller the thickness of the dielectric, which is not more than 3 mm.
  • the output voltage of the ignition coil 13 is present at the connection element 23 of the spark plug connector 14 which is connected to the high-voltage connection of the ignition coil 13.
  • the connecting element 23 is connected to the high-voltage switching element 22 via the connecting element 21.
  • a voltage hereinafter referred to as a voltage jump
  • the voltage jump arrives at the connection part 24 for receiving the connection pin 26 of the spark plug 17.
  • the ignition voltage that ultimately occurs in a known manner leads to ignition of a fuel-air mixture in an associated cylinder of the internal combustion engine by sparkover between the center electrode 29 and the ground electrode 28.
  • the voltage jump is a partial voltage of the breakover voltage, which depends on the component and the design of the high-voltage switching element 22.
  • the breakover voltage in turn is smaller than the output voltage of the ignition coil by a loss voltage.
  • the loss voltage can be changed by the capacitance distribution in the spark plug connector 14. It is the greater, the larger, based on the location of the high-voltage switching element 22 and in the direction of the energy flow from the ignition coil 13 to the spark plug 17, the sum of the pre-and after-capacitance compared to the pre-capacitance.
  • This loss voltage is reduced by a separate increase in the pre-capacitance, which is realized by the capacitance which is formed between the metal cup 32 and the screen 34 and which lies in front of the high-voltage switching element 22 in the direction of the energy flow.

Landscapes

  • Ignition Installations For Internal Combustion Engines (AREA)
  • Spark Plugs (AREA)

Claims (5)

  1. Elément de connexion pour une installation d'allumage, destiné à être monté entre une bobine d'allumage (13) et une bougie d'allumage (17) dans la culasse d'un moteur à combustion interne, comprenant un boîtier isolant (20) dans lequel est noyé un élément de commutation à haute tension (22), un élément de branchement (23) prévu à une extrémité du boîtier en matière isolante (20), et qui est au moins indirectement raccordable à un pôle de l'élément de commutation à haute tension (22), pôle auquel peut être relié directement un élément de branchement à haute tension de la bobine d'allumage (13), un élément de connexion (24) prévu à l'autre extrémité du boîtier en matière isolante (20), et qui est relié au moins indirectement à un autre pôle de l'élément de commutation à haute tension (22), pour recevoir une tige de branchement (26) de la bougie d'allumage (17) et un condensateur entre l'élément de branchement (23) et la culasse (11) qui est au potentiel de la masse,
    caractérisé en ce que
    l'élément de commutation à haute tension (22) est une diode basculante, le condensateur (32, 34) est à double paroi et entre l'élément de branchement (23) et l'élément de commutation à haute tension (22), sur une face extérieure du boîtier de matière isolante (20), il y a une coupelle métallique (32) formant le pôle du condensateur et reliée électriquement à la tension de sortie de la bobine d'allumage (13), la coupelle métallique (32) étant entourée par une enveloppe isolante (19) formant le diélectrique du condensateur (32, 34), et l'enveloppe isolante (19) est entourée par un écran métallique (34) qui forme l'autre pôle du condensateur.
  2. Elément de connexion selon la revendication 1,
    caractérisé en ce que
    l'élément de commutation à haute tension (22), lorsqu'est appliquée une tension de basculement, commute de manière réversible de l'état électriquement coupé à l'état électriquement conducteur, le branchement de haute tension de la bobine d'allumage (13) conduisant une tension de sortie de la bobine d'allumage (13) qui dépasse la tension de basculement, et l'écran (34) est à une tension inférieure à la tension de sortie de la bobine d'allumage (13).
  3. Elément de connexion selon la revendication 2,
    caractérisé en ce que
    l'écran (34) est mis électriquement à la masse.
  4. Elément de connexion selon la revendication 3,
    caractérisé en ce que
    des pattes élastiques (36) sont prévues sur l'écran (34), ces pattes étant dans le flux de la force et en liaison électrique avec la culasse (11) qui est à la masse.
  5. Elément de connexion selon la revendication 4,
    caractérisé en ce que
    l'écran (34) ainsi que la bobine d'allumage (13) sont fixés à la culasse (11) et sont en liaison électrique avec la culasse (11) qui est à la masse.
EP93114204A 1992-10-09 1993-09-04 Elément de connexion pour dispositif d'allumage Expired - Lifetime EP0591686B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4234077A DE4234077A1 (de) 1992-10-09 1992-10-09 Verbindungsteil einer Zündanlage
DE4234077 1992-10-09

Publications (3)

Publication Number Publication Date
EP0591686A2 EP0591686A2 (fr) 1994-04-13
EP0591686A3 EP0591686A3 (fr) 1995-02-15
EP0591686B1 true EP0591686B1 (fr) 1997-02-05

Family

ID=6470083

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93114204A Expired - Lifetime EP0591686B1 (fr) 1992-10-09 1993-09-04 Elément de connexion pour dispositif d'allumage

Country Status (5)

Country Link
US (1) US5370100A (fr)
EP (1) EP0591686B1 (fr)
JP (1) JPH06203943A (fr)
DE (2) DE4234077A1 (fr)
ES (1) ES2097953T3 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5716223A (en) * 1996-02-29 1998-02-10 General Motors Corporation Spark plug boot insulator
US6617769B2 (en) * 2000-06-30 2003-09-09 Ngk Spark Plug Co., Ltd. Spark plug and mounting structure of the same
EP1176681B1 (fr) * 2000-07-28 2004-03-17 Federal-Mogul Ignition Srl Bobine d'allumage pour véhicules
WO2006137168A1 (fr) * 2005-06-20 2006-12-28 Hugle Electronics Inc. Unité de décharge pour un ionisateur ca
US8316833B2 (en) * 2009-05-13 2012-11-27 Feng-Kuei Chen Ignition enhancer for a vehicle engine
DE102018108292B4 (de) * 2017-11-17 2023-05-11 Borgwarner Ludwigsburg Gmbh Verbindungsstecker zum Anschließen einer Zündspule an eine Zündkerze sowie Schutzrohr für einen Verbindungsstecker

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1554252A (en) * 1925-09-22 Poration
DE143941C (fr) *
GB927725A (en) * 1960-09-09 1963-06-06 Lucas Industries Ltd Electric spark ignition apparatus for prime movers
DE1232399B (de) * 1960-11-09 1967-01-12 Kurt Willutzki Dipl Ing Zuendtransformator fuer Brennstoff-Luft-Gemische
US3535582A (en) * 1968-03-18 1970-10-20 Joslyn Mfg & Supply Co Unitary series spark gap with aligned apertures
DE1951015C3 (de) * 1969-10-09 1979-02-15 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verfahren zum Herstellen eines Überspannungsknopf ableiten
BE789890A (fr) * 1971-10-12 1973-02-01 Western Electric Co Appareil de protection contre les surtensions, a tube a decharge, et son procede de realisation
DE2418261B2 (de) * 1974-04-16 1976-05-13 Siemens AG, 1000 Berlin und 8000 München Funkenstreckenbauelement fuer zuendanlagen von brennkaftmaschinen
US4123688A (en) * 1975-02-13 1978-10-31 Murata Manufacturing Co., Ltd. Spark plug cap
US4514712A (en) * 1975-02-13 1985-04-30 Mcdougal John A Ignition coil
US4082980A (en) * 1975-02-13 1978-04-04 Murata Manufacturing Co., Ltd. Spark plug cap providing a capacitor in parallel with the spark cap
JPS5842620Y2 (ja) * 1979-04-24 1983-09-27 日産自動車株式会社 プラズマ式点火装置
US4277724A (en) * 1979-10-18 1981-07-07 The Economy Engine Company Integral spark plug coil for automotive-type plug
DE3544870A1 (de) * 1985-12-18 1987-06-19 Beru Werk Ruprecht Gmbh Co A Zuendkerzenstecker
DE3730118A1 (de) * 1987-09-08 1989-03-16 Beru Werk Ruprecht Gmbh Co A Zuendkerzenstecker
DE3935379A1 (de) * 1989-10-24 1991-04-25 Bosch Gmbh Robert Hochspannungsschaltung mit hochspannungsschalter aus optoelektrischen halbleiterelementen

Also Published As

Publication number Publication date
ES2097953T3 (es) 1997-04-16
EP0591686A2 (fr) 1994-04-13
EP0591686A3 (fr) 1995-02-15
DE4234077A1 (de) 1994-04-14
DE59305384D1 (de) 1997-03-20
JPH06203943A (ja) 1994-07-22
US5370100A (en) 1994-12-06

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