EP0304037B1 - Système d'allumage pour moteurs à combustion - Google Patents

Système d'allumage pour moteurs à combustion Download PDF

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Publication number
EP0304037B1
EP0304037B1 EP19880113364 EP88113364A EP0304037B1 EP 0304037 B1 EP0304037 B1 EP 0304037B1 EP 19880113364 EP19880113364 EP 19880113364 EP 88113364 A EP88113364 A EP 88113364A EP 0304037 B1 EP0304037 B1 EP 0304037B1
Authority
EP
European Patent Office
Prior art keywords
ignition
spark
channel
sleeve
ignition system
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
EP19880113364
Other languages
German (de)
English (en)
Other versions
EP0304037A3 (en
EP0304037A2 (fr
Inventor
Alfred Krappel
Johannes Guggenmos
Josef Holzmann
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0304037A2 publication Critical patent/EP0304037A2/fr
Publication of EP0304037A3 publication Critical patent/EP0304037A3/de
Application granted granted Critical
Publication of EP0304037B1 publication Critical patent/EP0304037B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/12—Ignition, e.g. for IC engines

Definitions

  • the invention relates to an ignition system according to the preamble of patent claim 1.
  • Such a capacitor serves to increase the energy contained in the spark head of the ignition spark and thus to achieve ignition of even particularly lean mixtures with the help of this spark head.
  • So-called breakdown spark plugs have been known for some time, in which the capacitor is integrated in the spark plug. On the one hand, this leads to a significantly increased overall height of the spark plug and, on the other hand, that such spark plugs only have a short service life. Both problems present considerable difficulties in today's modern motor vehicle construction and have resulted in such spark plugs not being used.
  • the invention has for its object to provide an ignition system of the type mentioned, which forms the capacitor in a structurally simple manner and without increasing the overall height of the spark plug.
  • the invention solves this problem in an ignition system of this type by the means specified in the characterizing part of patent claim 1.
  • the capacitor is thus formed between the hollow body and the channel.
  • the insulation body in between prevents flashovers between the hollow body and the channel. In this way it is possible to construct such a capacitor in a constructive manner without changing the commercially available spark plug and thus to achieve the desired energy enrichment of the spark head.
  • the structural possibility of changing the length of the sleeve in relatively wide areas makes it possible to produce capacitors of a defined capacitance. This possibility is supported by the selection of a suitable dielectric as the material for the insulation body. In this way it is possible to vary the capacitance in a wide range with regard to its capacitance by constructive design of the sleeve and selection of the suitable insulation body.
  • JP-A-53.13031 it is known to enclose a single-coil ignition system consisting of an ignition coil and a connected spark plug with an electrically conductive hood and to avoid arcing between the mating contact of the spark plug and the high-voltage supply on the one hand and the channel, the internal combustion engine, in the the spark plug is inserted, an insulation body which has a relatively large distance from it in the area of the mating contact and which tightly encloses the insulating head part of the spark plug.
  • An increase in the ignition voltage which increases the risk of arcing in the area of the head part of the spark plug, is not intended.
  • an ignition system for an internal combustion engine is shown in section, which is partially shown as a section.
  • the ignition system is designed as a single coil ignition system 1 and is arranged in a cylinder head 2 of an internal combustion engine which is only partially shown.
  • a cylinder is partially shown with its bearings 3 and 4 for camshafts, not shown, which are located on the intake and exhaust sides.
  • the single-coil ignition system 1 consists of an overhead, schematically shown ignition coil 5 and a high-voltage supply in the form of a sleeve 6 and a connection contact 7.
  • the sleeve 6 is designed in stages and is located in a channel 8 of the internal combustion engine. It overlaps the connector 7 and the upper part of a spark plug 9, which is electrically connected to the connector 7 via a mating contact 10.
  • the insulation body 11 consists of a material with a high dielectric constant.
  • the sleeve 6 forms together with the insulation body 11 a capacitor, the electrodes of which are formed by the sleeve 6 and the inside of the channel 8 in the cylinder head 2 of the internal combustion engine.
  • the cylinder head 2 is made of metal and is at the same electrical potential as the - not shown - ground electrode of the spark plug 9.
  • the capacitor formed in this way leads to a significant increase in the energy contained in the spark head of the ignition spark, which is formed in the spark plug between the two electrodes. In this way, it is possible to ignite even particularly lean mixtures in the manner of a breakdown ignition with the help of the spark head. In this way, reproducible and exact ignition conditions within the individual cylinders of the internal combustion engine are achieved.
  • the sleeve 6, which essentially serves as a high-voltage supply and electrical connection between the ignition coil 1 and the spark plug 9, is in one piece with the ignition coil 1 or the insulating body surrounding it (not shown in detail). In this way it is possible, after a prepared insertion of the insulation body 11 into the channel 8 by attaching the single-coil ignition system 1, to form the capacitor and to achieve the desired ignition effect without additional measures and using a commercially available spark plug 9 which is not changed further.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (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 (3)

  1. Système d'allumage (1) pour un moteur à combustion interne avec une bobine d'allumage (5), avec une bougie d'allumage (9) raccordée à celle-ci par l'intermédiaire d'une alimentation en haute tension (6) s'étendant partiellement dans un canal (8) du moteur à combustion interne pour une étincelle d'allumage se formant sur un trajet d'étincelle et avec un condensateur monté en parallèle au trajet de l'étincelle pour accroître l'énergie d'allumage contenue dans la pointe de l'étincelle d'allumage, système d'allumage caractérisé en ce que l'alimentation haute tension est formée au moins en partie, par un fourreau (6) dans le parcours du canal (8), fourreau qui en partant de la bobine d'allumage (1), pénètre dans le canal (8) entoure le contact opposé (10) de la bougie d'allumage (9) et au moins partiellement s'accroche aussi à la tête de la bougie d'allumage isolante se raccordant au contact opposé (10) et en ce qu'un corps isolant (11) est inséré dans le canal (8) et est adapté par sa longueur axiale et sa surface intérieure à la forme du fourreau.
  2. Système d'allumage selon la revendication 1, caractérisé en ce que le corps isolant (11) est un fourreau qui est inséré dans le canal (8) indépendamment de l'alimentation haute tension (6).
  3. Système d'allumage selon les revendications 1 ou 2, caractérisé en ce que le fourreau d'alimentation en haute tension (6) est constitué d'une seule pièce avec une bobine d'allumage (5) associée au cylindre correspondant du moteur à combustion interne.
EP19880113364 1987-08-18 1988-08-17 Système d'allumage pour moteurs à combustion Expired - Lifetime EP0304037B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3727459A DE3727459C2 (de) 1987-08-18 1987-08-18 Zündsystem für Brennkraftmaschinen
DE3727459 1987-08-18

Publications (3)

Publication Number Publication Date
EP0304037A2 EP0304037A2 (fr) 1989-02-22
EP0304037A3 EP0304037A3 (en) 1989-04-12
EP0304037B1 true EP0304037B1 (fr) 1992-12-16

Family

ID=6333953

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880113364 Expired - Lifetime EP0304037B1 (fr) 1987-08-18 1988-08-17 Système d'allumage pour moteurs à combustion

Country Status (3)

Country Link
EP (1) EP0304037B1 (fr)
DE (2) DE3727459C2 (fr)
ES (1) ES2037160T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5060624A (en) * 1990-12-10 1991-10-29 Caterpillar Inc. Engine ignition system including a transformer assembly and positioning means therefor
DE10207550B4 (de) 2002-02-22 2004-05-27 Audi Ag Zündvorrichtung für eine Brennkraftmaschine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5313031A (en) * 1976-07-21 1978-02-06 Hitachi Ltd Igniter
US4324219A (en) * 1979-02-16 1982-04-13 Hayashi Seiko Kabushiki Kaisha Spark intensifier in gasoline engine
US4487192A (en) * 1983-04-18 1984-12-11 Ford Motor Co Plasma jet ignition system
SE436672B (sv) * 1983-08-05 1985-01-14 Saab Scania Ab Tendkassett ingaende i en forbrenningsmotors tendsystem
DE8518139U1 (de) * 1985-06-22 1986-10-16 PVL Probosch-Vogt-Loos GmbH & Co Electronic KG, 8501 Cadolzburg Mit einem Kerzenstecker integrierte Zündspule
DE3620826A1 (de) * 1985-06-22 1987-01-02 Pvl Probosch Vogt Loos Gmbh & Mit einem kerzenstecker integrierte zuendspule
DE3603025A1 (de) * 1986-01-31 1987-08-06 Isotec Ag Zwischenschalteinheit fuer eine zuendanlage
JPH0715853B2 (ja) * 1986-11-21 1995-02-22 日本電装株式会社 エネルギ−蓄積型点火コイル

Also Published As

Publication number Publication date
DE3727459C2 (de) 1999-02-11
DE3876716D1 (de) 1993-01-28
ES2037160T3 (es) 1993-06-16
DE3727459A1 (de) 1989-03-02
EP0304037A3 (en) 1989-04-12
EP0304037A2 (fr) 1989-02-22

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