EP0454598B1 - Bobine intégrée d'allumage individuel d'une bougie de moteur thermique à combustion interne et à allumage commandé - Google Patents

Bobine intégrée d'allumage individuel d'une bougie de moteur thermique à combustion interne et à allumage commandé Download PDF

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Publication number
EP0454598B1
EP0454598B1 EP19910420134 EP91420134A EP0454598B1 EP 0454598 B1 EP0454598 B1 EP 0454598B1 EP 19910420134 EP19910420134 EP 19910420134 EP 91420134 A EP91420134 A EP 91420134A EP 0454598 B1 EP0454598 B1 EP 0454598B1
Authority
EP
European Patent Office
Prior art keywords
barrel
housing
ignition coil
coil body
double
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
EP19910420134
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0454598A1 (fr
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
Application filed by Electricfil Industrie SARL, Electricfil SA filed Critical Electricfil Industrie SARL
Publication of EP0454598A1 publication Critical patent/EP0454598A1/fr
Application granted granted Critical
Publication of EP0454598B1 publication Critical patent/EP0454598B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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

Definitions

  • the present invention relates to the technical field of internal combustion heat engines and, more particularly, of spark ignition engines.
  • the invention relates, more particularly, to ignition systems in which each spark plug is equipped with a coil for transforming electrical energy capable of supplying it, from a source of low voltage electrical energy. , a high voltage energy necessary for the production of an ignition spark inside the combustion chamber that such a spark plug equips.
  • each spark plug is fitted with an integrated individual ignition coil.
  • the objective in such a case is to reduce the length of the conductors or cables ensuring the transmission of high voltage energy, in an attempt to eliminate significant electrical leaks detrimental to the proper functioning of the engine, but also to the radio environment -electric of such motors.
  • Such a structure poses problems of mechanical and electrical connection between the spark plug and the coil, in particular when the latter, produced in the form of an individual integrated block, must also be adapted on the cylinder head.
  • variable types of engines leads to equally variable cylinder head shapes and depths, so that it is necessary to make the blocks of integrated individual ignition coils in various forms and numerous, complementary to the various structures likely to be encountered.
  • EP 0 304 038 which comprises a housing or tank, associated with a laminated mass and containing a coil which is connected, on the one hand, to an external connector to the housing and, on the other hand, to a means of connection to a box extending the housing and of connection with a spark plug by means of an elastically deformable conductor.
  • the object of the invention is to fill the above gap by proposing a new integrated individual ignition coil. particularly designed to be able to be produced in large series, at an attractive cost price, while offering a possibility of adaptation to the different constructive characteristics of engine cylinder heads, and in particular well depths to guarantee good cooperation and good mechanical connection electric and dielectric between the plug connection terminal and the integrated individual ignition coil.
  • Fig. 1 is an elevation partly in section of an integrated individual ignition coil according to the invention.
  • Fig. 2 is a sectional elevation taken along line II-II of FIG. 1 .
  • Fig. 3 is a perspective, partially broken away, corresponding to FIGS. 1 and 2 .
  • Figs. 4 and 5 are perspective views, partially broken away, illustrating two alternative embodiments of one of the constituent elements of the integrated coil.
  • Figs. 1 and 2 show an integrated individual ignition coil of a spark plug 1 of a heat engine, located at the bottom of a well 2 of a cylinder head 3 of such an engine.
  • the coil designated as a whole by the reference 4 , is intended to be mounted on the cylinder head 3 to be interposed between the spark plug 1 and a power cable 5 , for example from a selective distributor 6 of the electronic type, supplied, directly or indirectly, from a storage source, such as a battery 7 , or a production source, such as an alternator.
  • the device 6 is designed so as to produce a temporary break in the supply of the coil 4 which is responsible, from a low voltage supply supplied by the cable 5 , to produce, as is conventional, a high voltage current at the candle 1 which comprises, in a traditional manner, a barrel 8 , as well as a connection terminal 9 constituted, in the usual way, for example by an olive.
  • the integrated individual ignition coil 4 comprises a housing or tank 10 , preferably made of a suitable plastic material, for example PBTP (polybutylene terephthalate) obtained by injection molding.
  • the housing 10 has an open top 11 and a bottom 12 , from which extends downwardly a barrel 13 of an insulating material, provided internally with a conductive core 14 , such as a metal bar ending at the open end part of the barrel 13 by a contact pad 15 .
  • PBTP polybutylene terephthalate
  • the barrel 13 forms, externally and set back from its open end, means 16 for adaptation for a tubular cap 17 of mechanical, electrical and dielectric cooperation with the spark plug 1 .
  • the cap 17 is made of a relatively flexible, non-conductive material, in particular made of silicone and represents an intermediate element responsible for ensuring an electrical connection and mechanical adaptation, as well as a seal and dielectric protection between the barrel 13 and the spark plug 1 .
  • the cap 17 forms a covering endpiece 18 capable of being fitted with sealing on the barrel 8 .
  • the cap 17 internally comprises a conductor 19 , elastically deformable, establishing a certain electrical connection between the stud 15 and the terminal 9 .
  • the elastic conductor 19 is advantageously constituted by a helical spring working under compression or a rubber cylinder driver.
  • the means 16 can be constituted in several different ways.
  • these means involve a flange 20 projecting from the periphery of the barrel 13 to cooperate with a complementary groove 21 presented by a housing 22 formed in the cap 17 to allow the barrel 13 to fit together.
  • the housing 22 is extended by a cylindrical bore 23 in which is located the conductor 19 which is normally constrained, after mounting the cap 17 on the end part of the barrel 13 , between the stud 15 and an internal shoulder of stop 24 able to be crossed by the connection terminal 9 of the spark plug 1 , after fitting the covering end piece 18 onto the barrel 8 of the latter.
  • the barrel 13 is an integral part of the bottom 12 of the housing 10 .
  • the barrel 13 is constituted by an independent part produced by injection in particular of a suitable plastic material such as in PBTP .
  • the barrel 13 extends in such a case, from a collar 25 , for example cylindrical, intended to be fitted into a base 26 formed by the bottom 12 of the housing or of the tank 10 .
  • the base 26 is preferably concentric with an opening 27 bordered by a flange 28 capable of cooperating with a rebate 29 formed in the connection zone, between the barrel 13 and the collar 25 .
  • Such means allow effective centering between the barrel 13 and the housing 10 , as well as the establishment of a sealed connection, in particular by interposing a seal 30 of the O-ring type for example.
  • the housing 10 contains, internally, a double coil body 35 constituted by a primary coil body 36 , made of any suitable insulating material, and a secondary coil body 37 concentric with the first that it surrounds.
  • the primary coil body carries a primary winding 38
  • the secondary body 37 carries a secondary winding 39 .
  • Section and length characteristics, as well as insulation primary and secondary windings must be considered to be within the skill of the art.
  • the bodies 36 and 37 are made of plastic, so that they can be threaded concentrically and axially as far as a stop position in which an axial immobilization snap intervenes, for example by means of a projection peripheral 40 formed by the secondary coil body 37 and engaged behind at least one projection 41 presented by the primary coil body 36 .
  • the coil bodies are produced in a substantially tubular form on which the primary and secondary windings are established in a conventional manner.
  • the double coil body is mounted inside the housing 10 , so as to be snapped onto the bottom 12 of the latter.
  • the latching takes place between moldings 42 formed by the secondary coil body 37 and latching lugs 43 rising from the bottom 12 .
  • the tabs 43 rise from the collar 25 which also forms abutment ribs 44 on which some of the at least concentric fins 45 formed by the secondary coil body come to bear. 37 .
  • a snap-fit by engagement in the direction of the arrow f 1 occurs automatically between the double coil body and the housing 10 .
  • Such a snap-fastening ensures a firm and resistant mechanical connection, as well as a centering which can be supplemented, in particular by the existence of bearing surfaces formed by the primary coil body 36 , in order to cooperate with the corresponding internal faces of the housing 10 .
  • the reel according to the invention further comprises a cap 50 intended to be engaged through the open top 11 to be fitted to the double reel body 35 .
  • the cap 50 comprises a plate 51 provided with latching tabs 52 and abutment ribs 53 , so that it can be adapted by snap-fastening on the secondary coil body, in a manner analogous to that described above.
  • the legs 52 and the ribs 53 cooperate in this direction with the moldings 42 and at least some of the fins 45 .
  • the cap 50 carries a connector 60 which rises from the plate 51 to protrude from the open top 11 .
  • the connector 60 is, for example, of the type with three connection blades 61 two of which such as 61 a and 61 b are connected to the two terminals of the primary winding 38 and the third of which 61 c is connected to one of the terminals of the secondary winding 39 , the other terminal of which is connected, directly or indirectly, to the conductive core 14 .
  • All of the above constituent parts are immobilized inside the housing 10 , in particular by means of a coating 62 of insulating plastic material, cast to fill and drown the double coil body, as well as the plate 51 .
  • the coil is completed by the presence of a laminated mass 70 passing through the housing 10 to be inserted inside the primary coil body 36 .
  • the laminated mass 70 comprises two closure loops surrounding the housing 10 and a central bar 71 passing through the primary coil body.
  • the mass is held on the housing by means of a stapling belt 72 .
  • the mass 70 is associated with a sole 73 forming lugs 74 for direct or indirect attachment to the cylinder head 3 .
  • Fig. 4 shows an exemplary embodiment of the laminated mass 70 in the form of two assemblies 70 1 and 70 2 shaped to be placed face to face and together delimit the central bar 71 .
  • FIG. 5 An alternative embodiment is illustrated in which the laminated mass comprises a carcass 70 3 overmolded in the tank 10 and associated with an independent bar 71 , around which is inserted or overmolded the primary body 36 of the coil.
  • the constitution of the housing and of the barrel 13 also makes it possible to envisage a specific manufacture as a function of the lengths to be given to the barrel in order to respect the different depths of well likely to be encountered. In this way, it is possible to carry out the manufacture of the cap 17 only in one length, which makes it possible to lower the manufacturing cost by having recourse to large series of production from a raw material whose The relatively high basic price can only be compensated by means of mass production.
  • variable adaptation factor as a function of the depth of the wells, from different ranges of manufacture of cannons 13 of variable length which can always be mounted and adapted on or in the housing 10 in traditional production lines, without affecting their production rates.
  • the adaptation of the length of the barrel 13 as a function of the depth of the well makes it possible to use a cap 17 of constant length, calculated so that its natural bending is relatively limited, so as to obtain, when adapting the integrated individual ignition coil on the cylinder head 3 , a certainty of fitting the end piece 18 on the barrel 8 and cooperation between the conductor 19 and the olive 9 .
  • the mechanical, electrical and dielectric cooperation functions devolved to the cap 17 are thus assumed in all cases, by providing a certainty of mechanical and electrical connection by simple introduction of the cap 17 inside the well 2 .

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)
EP19910420134 1990-04-23 1991-04-23 Bobine intégrée d'allumage individuel d'une bougie de moteur thermique à combustion interne et à allumage commandé Expired - Lifetime EP0454598B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9005353A FR2661216B1 (fr) 1990-04-23 1990-04-23 Bobine integree d'allumage individuel d'une bougie de moteur thermique a combustion interne et a allumage commande.
FR9005353 1990-04-23

Publications (2)

Publication Number Publication Date
EP0454598A1 EP0454598A1 (fr) 1991-10-30
EP0454598B1 true EP0454598B1 (fr) 1997-02-05

Family

ID=9396132

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910420134 Expired - Lifetime EP0454598B1 (fr) 1990-04-23 1991-04-23 Bobine intégrée d'allumage individuel d'une bougie de moteur thermique à combustion interne et à allumage commandé

Country Status (4)

Country Link
EP (1) EP0454598B1 (es)
DE (1) DE69124540T2 (es)
ES (1) ES2099742T3 (es)
FR (1) FR2661216B1 (es)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9113753U1 (de) * 1991-11-05 1993-03-04 Robert Bosch Gmbh, 7000 Stuttgart Zündspule für Zündanlagen von Brennkraftmaschinen
DE4309818C2 (de) * 1993-03-26 1999-10-28 Bayerische Motoren Werke Ag Zündeinheit für Brennkraftmaschinen
DE4404957C2 (de) * 1994-02-17 2003-08-21 Bosch Gmbh Robert Zündspule für eine Brennkraftmaschine
DE4442634B4 (de) 1994-11-30 2007-08-30 Bayerische Motoren Werke Ag Vorrichtung zum Befestigen eines Einzelspulenzündsystems mit dem Zylinderkopf einer Brennkraftmaschine
FR2933528B1 (fr) * 2008-07-07 2010-08-27 Electricfil Automotive Module d'allumage pour bobine de moteur thermique a combustion interne et allumage commande
EP2342788B1 (en) 2008-10-03 2020-04-08 Federal-Mogul Ignition LLC Ignitor for air/fuel mixture and engine therewith and method of assembly thereof into a cylinder head
FR2986112B1 (fr) 2012-01-25 2014-03-07 Electricfil Automotive Structure de composant electromagnetique a encombrement limite et composant electromagnetique pour notamment bobines de moteurs thermiques

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2180358A (en) * 1938-03-09 1939-11-21 Frederick J Hooven Ignition system
SE436672B (sv) * 1983-08-05 1985-01-14 Saab Scania Ab Tendkassett ingaende i en forbrenningsmotors tendsystem
US4715337A (en) * 1985-01-31 1987-12-29 Caterpillar Inc. Engine ignition system with an insulated and extendable extender
FR2599431B1 (fr) * 1986-06-03 1988-09-09 Renault Sport Bobine electromagnetique et dispositif d'allumage pour moteur a combustion interne comportant une telle bobine.
DE3708101A1 (de) * 1986-10-21 1988-04-28 Bosch Gmbh Robert Loesbare befestigungs-anordnung fuer direkt-zuendspulen an brennkraftmaschinen
US4706639A (en) * 1986-12-04 1987-11-17 General Motors Corporation Integrated direct ignition module
DE3727458A1 (de) * 1987-08-18 1989-03-02 Bayerische Motoren Werke Ag Zuendeinheit fuer verbrennungsmotoren
DE3852300T2 (de) * 1988-05-31 1995-04-06 Electricfil Zündtransformator und Zündkerzen-Einheit bei einem Zylinder in einer gesteuerten Brennkraftmaschine.

Also Published As

Publication number Publication date
FR2661216B1 (fr) 1992-08-14
EP0454598A1 (fr) 1991-10-30
DE69124540T2 (de) 1997-06-12
DE69124540D1 (de) 1997-03-20
ES2099742T3 (es) 1997-06-01
FR2661216A1 (fr) 1991-10-25

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