EP0344387A1 - Zündtransformator und Zündkerzen-Einheit bei einem Zylinder in einer gesteuerten Brennkraftmaschine - Google Patents

Zündtransformator und Zündkerzen-Einheit bei einem Zylinder in einer gesteuerten Brennkraftmaschine Download PDF

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Publication number
EP0344387A1
EP0344387A1 EP88420174A EP88420174A EP0344387A1 EP 0344387 A1 EP0344387 A1 EP 0344387A1 EP 88420174 A EP88420174 A EP 88420174A EP 88420174 A EP88420174 A EP 88420174A EP 0344387 A1 EP0344387 A1 EP 0344387A1
Authority
EP
European Patent Office
Prior art keywords
spark plug
coil
block according
sleeve
ignition
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.)
Granted
Application number
EP88420174A
Other languages
English (en)
French (fr)
Other versions
EP0344387B1 (de
Inventor
Philippe François Marie Biton
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.)
Electricfil Industrie SARL
Electricfil SA
Original Assignee
Electricfil Industrie SARL
Electricfil 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
Priority to FR8705238A priority Critical patent/FR2613779B1/fr
Application filed by Electricfil Industrie SARL, Electricfil SA filed Critical Electricfil Industrie SARL
Priority to ES88420174T priority patent/ES2067484T3/es
Priority to EP19880420174 priority patent/EP0344387B1/de
Priority to DE19883852300 priority patent/DE3852300T2/de
Publication of EP0344387A1 publication Critical patent/EP0344387A1/de
Application granted granted Critical
Publication of EP0344387B1 publication Critical patent/EP0344387B1/de
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
    • 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
    • H01T13/44—Sparking plugs structurally combined with other devices with transformers, e.g. for high-frequency ignition
    • 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
    • H01F2038/122—Ignition, e.g. for IC engines with rod-shaped core

Definitions

  • the present invention relates to the technical field of heat engines, more particularly, of the explosion and spark-ignition type.
  • the engines of the above type include, for each cylinder which they comprise, a spark plug mounted on the cylinder head so that the electrodes which it possesses are arranged inside the combustion chamber of the cylinder.
  • a spark plug must be supplied with electric current so as to produce an ignition spark between its electrodes for each operating cycle of the cylinder.
  • Such an installation is known, on the one hand, to be the source of electrical leaks due, mainly, to the length of the high-voltage cables and to the presence of humidity and deposits of various materials favoring the maintenance of this humidity and, on the other hand, to emit parasites harmful to the proper functioning of radio installations.
  • Another proposal of the prior art was to place an electronic distribution on a low voltage cable leading to a multi-output transformer group connected by high voltage cables to the different plugs.
  • the object of the present invention is to remedy the above drawbacks by proposing an integrated transformer-ignition block, of particularly simple and reliable construction, designed to be associated, individually, with a spark plug. ignition of traditional construction and requiring, for its adaptation to an existing heat engine, no fundamentally important structural modification.
  • the integrated transformer-ignition block is characterized in that: the means is constituted by a removable securing means for cooperating with an additional thread presented by the base of a suitable spark plug, - and the terminal is in contact with the olive of a candle and is surrounded by an internal sleeve, made of dielectric material, extending the coil up to the shoulder and intended to fit, with sealing, the barrel of a candle on which the block is mounted.
  • Fig. 1 shows, schematically, an ignition installation of an internal combustion engine 1 of the explosion-ignition type.
  • the engine 1 is illustrated, by way of example, in the form of an assembly comprising four cylinders 2 which must be selectively controlled by ignition, in a predetermined order. It is obvious that the invention can be applied to any engine comprising a different number of cylinders 2 .
  • An ignition installation 3 of such an engine 1 comprises a source of electrical energy 4 connected by a low voltage cable 5 to a distribution means 6 associated with a block of control 6 a and itself connected by low voltage cables 7 to each of the spark plugs 8 mounted on the cylinder head 9 of the engine 1 .
  • each block 10 comprises a tubular body 11 , in any suitable material, in particular metallic or in charged conductive plastic, in order to constitute an electromagnetic shielding.
  • the body 11 defines, on either side of an annular shoulder 12 , a thread 13 and a housing 14 , preferably coaxial, opening, respectively, at each of the ends of the tubular body 11 .
  • the body 11 can be produced in a single piece or in two parts which can be assembled in a sealed manner.
  • the internal thread 13 is intended for mounting the body 11 on a spark plug 15 comprising a barrel 16 connected by a base 17 to a flange 18 from which extends a base 19 provided with electrodes 20 and 21 .
  • the spark plug 15 comprises, for this purpose, on the base 17 , a thread 22 complementary to the thread 13 which has an axial length slightly less than the height of the base 17 .
  • the watertight assembly between the internal thread 13 and the base 17 is ensured by a seal 23 subject to crushing between the open transverse end of the tubular body 11 and the flange 18 .
  • the axial length relationship between the internal thread 13 and the thread 17 is also determined so as to involve, after partial crushing of the seal 23 , a positive abutment of the base 17 against the shoulder 12 .
  • the housing 14 contains a transformer coil 24 embedded in a dielectric coating 25 ensuring its centering in the housing 14 , as well as its axial immobilaton.
  • the coating 25 can form a collar 26 immobilized axially in abutment against a shoulder 27 of the housing 14 , by a closure plug 28 .
  • the transformer coil 24 passes through the tubular body 11 by a connector 29 designed in any way suitable for allow mechanical and electrically efficient connection with a low voltage connection cable 7 .
  • the connector 29 has three connection terminals, two of which are connected to a primary winding E1 ( FIG. 3 ) and the other of which is connected to a secondary winding E2 connected to a contact terminal 30 placed internally on the body 11 .
  • the terminal 30 is surrounded by an end piece 31 for adapting a sleeve 32 of dielectric material, placed in the housing 14 between the coil 24 and the shoulder 12 .
  • the sleeve 32 axially delimits a bore 33 allowing the tight fitting of the barrel 16 of a spark plug 15 .
  • the sleeve 32 is preferably designed and produced from an elastomer capable of accepting an elastic deformation, in particular in a radial direction, from the bore 33 .
  • the adapter end piece 31 is made to allow snap fitting of the sleeve 32 around the terminal 30 which is preferably constituted by an elastically retractable stud 34 and intended to cooperate with an olive 35 usually fitted to the upper end cask 16 .
  • the mounting of the tubular body 11 on a spark plug 15 makes it possible to produce a unitary block in which the olive 35 is in permanent contact with the stud 34 of the coil 24 .
  • the contact surfaces, between the stud 34 and the olive 35 are confined inside the bore 33 which is isolated from the ambient environment by the upper closure plug 28 and by the presence of the seal. seal 23 and by tightening the sleeve 32 on the barrel 16 . This eliminates any risk of introduction of foreign bodies and moisture which could interfere with good electrical contact.
  • the tubular body 11 is preferably made so as to present a housing 14 of diameter, notably, larger than that of the internal thread 13 , so as to admit a sleeve 32 of large radial thickness.
  • the block 10 makes it possible to produce a unitary assembly integrating the function of transforming the low voltage supply current into high voltage and the ignition function inside a cylinder.
  • the transmission of a high-voltage current takes place directly between the contact pad 34 and the olive 35 and thus makes it possible to remove any cable and connection end pieces liable to be the source of leakage, breakdown, loss. of energy and loss of dielectric continuity.
  • the integrated transformer-ignition block according to the invention can be produced in a practical and efficient manner by being subjected, in the factory, to the various functional and leakage checks. Such a block can thus be adapted directly to a spark plug without involving other operations than screwing the latter into the thread 13 , after interposition of the seal 23 .
  • the tightening torque applied can be precisely assessed, between tightening tools respectively adapted on the base 18 and on a head 36 , for example, with a hexagon.
  • the object of the invention can thus be mounted in a unitary form prior to the adaptation of the spark plug 15 on the cylinder or even be formed after the traditional adaptation of this candle on the cylinder.
  • the function of the tapping 13 is to carry out the adaptation of the body 11 on a spark plug 15 without transmission of stress to the barrel 16 .
  • Another assembly means could also be provided for this purpose.
  • an assembly of the type with wedging by conjugated cones could also be envisaged.
  • the block according to the invention can be adapted to any type of spark plug mounted on traditional cylinder heads or delimiting deep implantation wells.
  • the tubular body 11 is then preferably associated with an elastomer ring 37 capable of ensuring a centering and guiding the tubular body 11 , as well as a closing function opposing the introduction of any foreign body into the well.
  • the ring 37 may also have the function of limiting the mechanical stresses liable to be transmitted to the base 17 by the operating vibrations applied to the mass represented by the integrated transformer-ignition block.
  • the body 11 delimits a housing 14 and a coaxial thread 13 and contains a coil 24 and a sleeve 32 also coaxial.
  • the sleeve 32 could form an integral part of the coating 25 of the coil 24 .
  • the constitution in integrated form of a transformer-ignition block has, compared to the prior art, the advantages of reducing losses between the coil and the spark plug, of ensuring a better seal facilitating cold starts and of decreasing very notably the emission of radioelectric interference, more particularly, if the body 11 is made of a magnetic metallic material constituting a shielding of the coil and of the spark plug.
  • This construction can also be envisaged for ignition systems of the inductive or capacitive type.
  • the body 11 could be produced in two component parts assembled, in particular by screwing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Spark Plugs (AREA)
EP19880420174 1987-04-08 1988-05-31 Zündtransformator und Zündkerzen-Einheit bei einem Zylinder in einer gesteuerten Brennkraftmaschine Expired - Lifetime EP0344387B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR8705238A FR2613779B1 (fr) 1987-04-08 1987-04-08 Bloc transformateur-allumage integre pour cylindre de moteur thermique a allumage commande
ES88420174T ES2067484T3 (es) 1988-05-31 1988-05-31 Bloque transformador con encendido integrado para cilindro de motor termico de encendido regulado.
EP19880420174 EP0344387B1 (de) 1988-05-31 1988-05-31 Zündtransformator und Zündkerzen-Einheit bei einem Zylinder in einer gesteuerten Brennkraftmaschine
DE19883852300 DE3852300T2 (de) 1988-05-31 1988-05-31 Zündtransformator und Zündkerzen-Einheit bei einem Zylinder in einer gesteuerten Brennkraftmaschine.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19880420174 EP0344387B1 (de) 1988-05-31 1988-05-31 Zündtransformator und Zündkerzen-Einheit bei einem Zylinder in einer gesteuerten Brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP0344387A1 true EP0344387A1 (de) 1989-12-06
EP0344387B1 EP0344387B1 (de) 1994-11-30

Family

ID=8200462

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880420174 Expired - Lifetime EP0344387B1 (de) 1987-04-08 1988-05-31 Zündtransformator und Zündkerzen-Einheit bei einem Zylinder in einer gesteuerten Brennkraftmaschine

Country Status (3)

Country Link
EP (1) EP0344387B1 (de)
DE (1) DE3852300T2 (de)
ES (1) ES2067484T3 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU607875B2 (en) * 1989-03-13 1991-03-14 General Motors Corporation Spark developing apparatus for internal combustion engines
FR2661216A1 (fr) * 1990-04-23 1991-10-25 Electricfil Ind Sarl Bobine integree d'allumage individuel d'une bougie de moteur thermique a combustion interne et a allumage commande.
WO1992013354A2 (de) * 1991-01-25 1992-08-06 Robert Bosch Gmbh Befestigungsanordnung für anschlüsse an zündspulen für kraftfahrzeuge
DE4442634A1 (de) * 1994-11-30 1996-06-05 Bayerische Motoren Werke Ag Vorrichtung zum Befestigen eines Einzelspulenzündsystems mit dem Zylinderkopf einer Brennkraftmaschine
EP0827165A2 (de) * 1996-08-31 1998-03-04 Toyo Denso Kabushiki Kaisha Zündspulenvorrichtung für Brennkraftmaschine
EP0827163A2 (de) * 1996-08-31 1998-03-04 Toyo Denso Kabushiki Kaisha Zündspulenvorrichtung für Brennkraftmaschine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7238530B2 (ja) 2019-03-26 2023-03-14 株式会社デンソー 点火コイル

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2467725A (en) * 1947-08-28 1949-04-19 Westinghouse Electric Corp Ignition system
US2632132A (en) * 1951-06-15 1953-03-17 Delano James Kendall Spark plug
US3940649A (en) * 1974-07-09 1976-02-24 Berstler Francis E Spark plug construction
EP0248717A1 (de) * 1986-06-03 1987-12-09 Renault Sport Elektromagnetische Spule und Zündvorrichtung für Verbrennungsmotor mit einer solchen Spule

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2467725A (en) * 1947-08-28 1949-04-19 Westinghouse Electric Corp Ignition system
US2632132A (en) * 1951-06-15 1953-03-17 Delano James Kendall Spark plug
US3940649A (en) * 1974-07-09 1976-02-24 Berstler Francis E Spark plug construction
EP0248717A1 (de) * 1986-06-03 1987-12-09 Renault Sport Elektromagnetische Spule und Zündvorrichtung für Verbrennungsmotor mit einer solchen Spule

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU607875B2 (en) * 1989-03-13 1991-03-14 General Motors Corporation Spark developing apparatus for internal combustion engines
FR2661216A1 (fr) * 1990-04-23 1991-10-25 Electricfil Ind Sarl Bobine integree d'allumage individuel d'une bougie de moteur thermique a combustion interne et a allumage commande.
EP0454598A1 (de) * 1990-04-23 1991-10-30 Société à Responsabilité Limitée L'ELECTRICFIL INDUSTRIE Integrierte Zündeinheit, die Kerze und Zündspule für gesteuerte einzelne Zündung in einer Brennkraftmaschine enthält.
WO1992013354A2 (de) * 1991-01-25 1992-08-06 Robert Bosch Gmbh Befestigungsanordnung für anschlüsse an zündspulen für kraftfahrzeuge
WO1992013354A3 (de) * 1991-01-25 1992-10-29 Bosch Gmbh Robert Befestigungsanordnung für anschlüsse an zündspulen für kraftfahrzeuge
US5364279A (en) * 1991-01-25 1994-11-15 Robert Bosch Gmbh Fastening arrangement for connections at ignition coils for motor vehicles
DE4442634A1 (de) * 1994-11-30 1996-06-05 Bayerische Motoren Werke Ag Vorrichtung zum Befestigen eines Einzelspulenzündsystems mit dem Zylinderkopf einer Brennkraftmaschine
DE4442634B4 (de) * 1994-11-30 2007-08-30 Bayerische Motoren Werke Ag Vorrichtung zum Befestigen eines Einzelspulenzündsystems mit dem Zylinderkopf einer Brennkraftmaschine
EP0827163A2 (de) * 1996-08-31 1998-03-04 Toyo Denso Kabushiki Kaisha Zündspulenvorrichtung für Brennkraftmaschine
EP0827165A3 (de) * 1996-08-31 1998-10-28 Toyo Denso Kabushiki Kaisha Zündspulenvorrichtung für Brennkraftmaschine
EP0827163A3 (de) * 1996-08-31 1998-11-18 Toyo Denso Kabushiki Kaisha Zündspulenvorrichtung für Brennkraftmaschine
EP0951026A2 (de) * 1996-08-31 1999-10-20 Toyo Denso Kabushiki Kaisha Zündspulenvorrichtung für Verbrennungsmotor
EP0951027A2 (de) * 1996-08-31 1999-10-20 Toyo Denso Kabushiki Kaisha Zündspulenvorrichtung für Verbrennungsmotor
EP0951026A3 (de) * 1996-08-31 2000-04-19 Toyo Denso Kabushiki Kaisha Zündspulenvorrichtung für Verbrennungsmotor
EP0951027A3 (de) * 1996-08-31 2000-04-19 Toyo Denso Kabushiki Kaisha Zündspulenvorrichtung für Verbrennungsmotor
EP0827165A2 (de) * 1996-08-31 1998-03-04 Toyo Denso Kabushiki Kaisha Zündspulenvorrichtung für Brennkraftmaschine

Also Published As

Publication number Publication date
DE3852300D1 (de) 1995-01-12
ES2067484T3 (es) 1995-04-01
EP0344387B1 (de) 1994-11-30
DE3852300T2 (de) 1995-04-06

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