EP0591250B1 - Bougie d'allumage pour l'allumage de melanges carburant-air - Google Patents

Bougie d'allumage pour l'allumage de melanges carburant-air Download PDF

Info

Publication number
EP0591250B1
EP0591250B1 EP92911138A EP92911138A EP0591250B1 EP 0591250 B1 EP0591250 B1 EP 0591250B1 EP 92911138 A EP92911138 A EP 92911138A EP 92911138 A EP92911138 A EP 92911138A EP 0591250 B1 EP0591250 B1 EP 0591250B1
Authority
EP
European Patent Office
Prior art keywords
spark plug
diode cascade
combustion
insulating body
plug according
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
EP92911138A
Other languages
German (de)
English (en)
Other versions
EP0591250A1 (fr
Inventor
Hans Schäfer
Dittmar Klett
Hermann Kersting
Bernd Müller
Jochen Fischer
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 EP0591250A1 publication Critical patent/EP0591250A1/fr
Application granted granted Critical
Publication of EP0591250B1 publication Critical patent/EP0591250B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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 for igniting fuel-air mixtures, in particular for internal combustion engines in motor vehicles, and relates to the installation of an electronic voltage switching element built into the longitudinal bore of the associated electrical insulating body, namely to the installation of a breakdown diode cascade;
  • the flip-flop cascade which suddenly changes from the blocking state to the conductive state at a preselectable and predetermined voltage, has the purpose of switching the voltage on the secondary winding of the ignition coil to the spark gap of the spark plug only when the ignition voltage is reached, and consequently energy losses in the region of the combustion chamber side of the electrical insulator, which can otherwise occur as a result of shunts caused by electrically conductive deposits.
  • a spark plug is known from US-A-3,173,056, a resistor being arranged in a longitudinal bore of the electrical insulating body. This resistance is surrounded by an insulating sheath, which is injected into the longitudinal bore of the electrical insulating body.
  • the invention has for its object to arrange the breakdown diode cascade and the adjacent components so that a large-scale, Inexpensive and production-safe assembly of such spark plugs is guaranteed and the spark plugs installed in this way can withstand the loads acting on them (e.g. temperature changes, vibrations) in the long term.
  • the sheathing of the breakover diode cascade consists of a material which is only slightly resilient or of an elastic material, as a result of which arcing between the two spaced-apart connecting parts of the breakdown diode cascade is particularly reliably prevented.
  • connection part For the cohesion of the structural unit on the connection side located in the longitudinal bore of the electrical insulating body, consisting of connection parts and tilting diode cascade with sheathing, it is advantageous if the connecting part also has anchoring means which are able to withstand torsional stresses acting on the sheathing of the tilting diode cascade; Torsion-proof anchoring means of this type are particularly expedient for spark plugs in which the connecting part is fastened by screwing into the connection-side region of the longitudinal bore of the electrical insulating body.
  • the spark plug it is also simpler in terms of its assembly and safer in terms of electrical contacting between the tilting cascade and connecting bolts if a ring-like contact part is provided on the tilting diode cascade and a correspondingly dimensioned, coaxial contact pin is provided on the connection-side end of the connecting bolt; alternatively, one can also make contact between the breakover diode cascade and the connecting bolt Spring element are used, which is preferably fixed to the breakdown diode cascade.
  • FIG. 1 shows a first embodiment of a spark plug according to the invention, shown enlarged, in longitudinal section (connecting part cemented or glued into the electrical insulating body; connecting wire of the tilting diode cascade pressed into the connecting bolt),
  • FIG. 2 shows the further enlarged constructional unit of connecting part and encased tilting diode cascade according to FIG. 1,
  • FIG second embodiment of a spark plug according to the invention shown enlarged, in longitudinal section (connecting part screwed into the electrical insulating body; ring-like contact part on the tilting diode cascade and contact pin on the connecting bolt),
  • FIG. 1 shows a first embodiment of a spark plug according to the invention, shown enlarged, in longitudinal section (connecting part cemented or glued into the electrical insulating body; connecting wire of the tilting diode cascade pressed into the connecting bolt)
  • FIG. 2 shows the further enlarged constructional unit of connecting part and encased tilting diode cascade according to FIG. 1
  • FIG. 4 shows the further enlarged constructional unit of connecting part and encased tilting diode cascade according to FIG. 3
  • FIG. 5 shows a third embodiment of an inventive , enlarged spark plug in longitudinal section (connecting part screwed into the electrical insulating body; spring element for contacting Tilting diode cascade and connecting bolt)
  • FIG. 6 shows the further enlarged constructional unit of the connecting part and encased tilting diode cascade according to FIG. 5.
  • the (high-voltage) spark plug 10 shown in FIG. 1 has a substantially tubular metal housing 11, which has a screw thread 12, a hexagon key 13 and a sealing ring 14 on its outside as a means for installing the spark plug 10 in an internal combustion engine, not shown, in particular in an internal combustion engine of motor vehicles; this metal housing 11 has in the region of its combustion chamber end a corrosion-resistant ground electrode 15, which in the previous example is designed as a welded, bent wire, but also from another Configuration can be.
  • the metal housing 11 comprises in its step-shaped through bore 16 in a known manner a rotationally symmetrical electrical insulating body 17 which, for. B.
  • connection side consists essentially of sintered aluminum oxide, on the connection side has a so-called head 17/1, which is followed by a collar 17/2, a collar shoulder 17/3 and a foot 17/4 in the direction of the combustion chamber.
  • This electrical insulating body 17 lies with a shoulder 18, which is formed between the foot 17/4 and the shoulder 17/3, on a shoulder 19 in the through hole 16 of the metal housing 11;
  • a sealing ring 20 is usually arranged between the shoulder 18 and the shoulder 19.
  • connection-side shoulder 21 which is formed between the head 17/1 and the collar 17/2 of the electrical insulating body 17, there is usually a crimp ring 22;
  • the connection-side region of the metal housing 11 is shaped as a flange 23 via this flange ring 22.
  • the electrical insulating body 17 is held firmly and tightly in the metal housing 11; the shrink area of the metal housing 11 is identified in FIG. 1 by the reference number 11/1.
  • the electrical insulating body 17 can also be fixed in a known manner by cementing or the like in the metal housing 11.
  • the electrical insulating body 17 has in a known manner a step-shaped longitudinal bore 24, the head bore 24/1 located in the connection-side area has a larger diameter than the foot bore 24/2 located in the combustion chamber-side area of the electrical insulating body 17; the foot hole 24/2 begins approximately in the area of the shoulder 17/3.
  • this foot hole 24/2 extends a center electrode 25, the shaft 25/1 of which essentially fills the cross section of the foot hole 24/2 of the electrical insulating body foot 17/4, with its combustion chamber end facing and opposing the ground electrode 15 via a spark gap 26 its connection-side section merges into a head 25/3, again with a smaller diameter, via a collar 25/2.
  • the collar 25/2 of this central electrode 25 lies in the longitudinal bore 24 on the shoulder 24/3 formed between the head bore 24/1 and the foot bore 24/2 and consequently determines the longitudinal fixation of this central electrode 25.
  • This central electrode 25 consists in a known manner of a corrosion-resistant Material (e.g.
  • nickel alloy it can also be provided in a known manner with a core (not shown) made of heat-conducting material (e.g. copper) and / or in the ignition area with refractory precious metals or the like.
  • the head 25/3 of the center electrode 25 can preferably be provided with anchoring means (not shown) (for example grooves, wings) and be surrounded with an electrically conductive and also heat-conductive casting compound 27 which surrounds the area of the head bore 24 / 1 of the electrical insulating body 17 fills and extends in this head bore 24/1 even further on the connection side.
  • Potting compounds 27 of this type are known (for example from DE-A-1 206 209), they can additionally also be provided with substances which act as electrical resistance (for example US-A-3 903 453).
  • a connecting bolt 28 with its shank 28/1 dips into this potting compound 27, the surface of which is equipped in a known manner with knurling or the like for better anchoring and the outside diameter of which is smaller than the inside diameter of the longitudinal bore 24 of the electrical insulating body 17.
  • This Connecting bolt 28 consists of a metal and has a head 28/2 adjoining its shaft 28/1 on the connection side; this Head 28/2 has a diameter that is larger than the diameter of the shaft 28/1 and almost fills the cross section of the longitudinal bore 24 of the electrical insulating body 17.
  • a coaxial blind hole 28/4 is located in the connection-side end face 28/3 of this head 28/2.
  • the connecting bolt 28 is followed on the connection side by a tilting diode cascade 29, as is known in principle from the German patent application DE-A-37 31 393;
  • a breakdown diode cascade 29 serves as a voltage switch, in the high-voltage spark plug 10 described here in FIG. 1 as a high-voltage switch, which suddenly changes from the blocking state to the conductive state at a preselectable and predetermined voltage and consequently the voltage present on the secondary winding of an ignition coil (not shown) only when it is reached the ignition voltage to the spark gap 26 of the spark plug 10.
  • this breakover diode cascade 29 has the shape of a cylinder (see also FIG. 2), but can also be of a different configuration (for example a column with a polygonal cross section).
  • the shaft 29/1 of this tilting diode cascade 29 is delimited on the combustion chamber side by an end face 29/2 and on the connection side by an end face 29/3, from each of which a connecting wire 29/4 or 29/5 protrudes; these connecting wires 29/4 and 29/5 are relatively short and stiff and, in a preferred embodiment, their surfaces are provided with (unmarked) knurling, preferably with longitudinal knurling.
  • Toggle diode cascade 29 contains a number of diodes of certain reverse voltage and is electrically connected in series; Depending on the dielectric strength and the desired ignition voltage, a corresponding number of diodes are accommodated in this shaft 29/1, preferably stacked on top of one another and connected to one another.
  • 25 such diodes would be required for a desired ignition voltage of, for example, 25 kV, provided that each of the diodes used has a reverse voltage of 1 kV.
  • the structure of such a breakover diode cascade 29 is not the subject of the present invention.
  • This breakdown diode cascade 29 is fixed with its combustion-chamber-side connecting wire 29/4 in the blind hole 28/4 of the connecting bolt 28 by pressing in, while the connecting-side connecting wire 29/5 is connected to a metallic connecting part 30.
  • This connecting part 30 is essentially rotationally symmetrical and is subdivided into the connection-side head 30/1, the adjoining collar 30/2, the fastening section 30/3 which then follows and the coaxial attachment 30/4 which then still adjoins; a coaxial blind hole 30/6 is incorporated in the combustion chamber end face 30/5 of the connecting part 30, the diameter of which is dimensioned such that the knurled connecting wire 29/5 on the side of the breakover diode cascade 29 can be press-fitted therein.
  • Anchoring means 30/7 in the form of a longitudinal knurl, a cross knurl or the like are attached to the outside of the coaxial extension 30/4.
  • Knurling 30/8 is also formed on the outside of the fastening section 30/3, e.g. B. a longitudinal, transverse or cross knurling, but instead ring grooves or a thread can be used.
  • This connecting part 30 is in the head bore 24/1 of the longitudinal bore 24 in the electrical insulating body 17 and lies with its collar 30/2 on the connection-side end face 17/5 of the electrical insulating body 17; the fastening section 30/3 provided with knurling 30/8 of the connecting part 30 in the connection-side area of the head bore 24/1 of the longitudinal bore 24 in the electrical insulating body 17 by means of putty or adhesive in a known manner.
  • chambers (not shown) can also be provided for receiving putty or adhesive.
  • the tilting diode cascade 29 is covered by an electrically insulating sheath 31, which with its cylindrical peripheral surface seals, at least partially, into the head bore 24/1 the electrical insulating body 17 can be inserted and is therefore preferably provided with outwardly pointing annular lips 31/2;
  • this covering 31 can consist of a material which is only slightly resilient (e.g. a plastic such as elastomers), but can also consist of an elastic material (rubber-like substances such as PTFE).
  • this sheath 31 projects beyond the area of the shaft 29/1 of the tilting diode cascade 29, still includes the coaxial extension 30/4 of the connecting part 30 and in doing so adheres securely to the anchoring means 30/7 attached to the outside.
  • the casing 31 is produced according to this exemplary embodiment by injection molding the selected material around the breakdown diode cascade 29, but can also be produced by pushing or shrinking corresponding components onto the breakdown diode cascade 29.
  • the connecting part 30, the breakdown diode cascade 29 and the sheath 31 thus form a common component which can be handled easily and reliably during the assembly of such spark plugs 10.
  • the head 30/1 of the connecting part 30 is shown in the present embodiment with a standardized profile (SAE profile) but also - as is often the case - be designed such that a threaded pin 30/9 is provided on the collar 30/2 of this connecting part 30 on the connection side, onto which a nut 30/10 is screwed, which has a SAE profile on the outside Has.
  • SAE profile standardized profile
  • the center electrode 25 is first inserted into the foot hole 24/2 of the electrical insulating body 17, so that its collar 25/2 on the shoulder 24/3 in the longitudinal bore 24 of the electrical insulating body 17 comes to rest. Then a predetermined amount of the powdery or granular, still cold casting compound 27 is added to the longitudinal bore 24 of the vertically held electrical insulating body 17 and the connecting bolt 28 is then also arranged above it.
  • This arrangement is heated in a vertical position in such a way that the casting compound 27 melts and then the connecting bolt 28 with its shaft 28/1 is pressed to a certain extent into the molten casting compound 27; the casting compound 27 then rises in part into the annular gap formed between the connecting pin shaft 28/1 and the electrical insulating body head bore 24/1.
  • the assembly formed by the connecting part 30, the tilting cascade 29 and the casing 31 is inserted on the connection side into the head bore 24/1 of the electrical insulating body 17, to such an extent that the connecting wire 29/4 of the tilting cascade 29 on the combustion chamber side is press-fitted into the blind hole 28/4 of the connecting bolt 28 dips.
  • the fastening section 30/3 of the connecting part 30 Before inserting the latter unit into the head bore 24/1 of the electrical insulating body 17, the fastening section 30/3 of the connecting part 30 has been provided with a putty or an adhesive which then hardens after the described unit has been inserted; instead of coating the fastening section 30/3 of the connecting part 30 with the adhesive or the putty, this region of the head bore 24/1 of the electrical insulating body 17 may alternatively also have been provided with it.
  • the immersion depth of the connecting part 30 and thus also the immersion depth of the tilting diode cascade 29 in the longitudinal bore 24 of the electrical insulating body 17 is determined by the collar 30/2 as a result of striking the end face 17/5 of the electrical insulating body 17.
  • the further assembly of the spark plug 10 with the metal housing 11, etc. can be carried out in a known manner and is no longer the subject of the present invention.
  • spark plug 10 described above is suitable for large-scale production, ensures cost-effective and production-safe assembly, resists the loads acting on it and, by means of its tilting diode cascade 29, prevents electrical shunts, which in spark plugs of this type are often caused by electrically conductive deposits on the electrical insulator base 17 / 4 are available.
  • the arrangement of the components described with reference to FIGS. 1 and 2 can also be used for spark plugs in which the center electrode is sintered into a smaller diameter foot hole in the electrical insulating body - as is known, for example, from EP patent specification 0 101 547; In this case, a contact pin arranged above the actual center electrode in this embodiment of a spark plug must also be provided.
  • This arrangement according to the invention can also be used in spark plugs with sliding spark gaps, as they have long been state of the art, the electrical insulator forming the sliding spark gap being able to be made in a known manner from a semiconducting material (eg SiC); such spark plugs are known to have a considerably lower ignition voltage requirement (low-voltage spark plugs).
  • a semiconducting material eg SiC
  • This arrangement can also be used for spark plugs which also have a combined air and sliding spark gap which is known per se.
  • the invention can also be advantageously used for fully shielded spark plugs, in which, as is known, the area on the connection side of the metal housing is also surrounded by a metal tube.
  • FIGS. 3 and 4 show a second embodiment of a spark plug 10 'according to the invention.
  • This spark plug 10 ' also has a connection part 30' and a breakover diode cascade 29 'which are connected to one another by means of a sheath 31'.
  • connection part 30' with its fastening section 30/3 ' is not only inserted into the connection-side section of the head bore 24/1' of the electrical insulating body 17 ' and is fixed by means of adhesive or putty, but in this exemplary embodiment of the spark plug 10 ', the fastening section 30/3' of the connecting part 30 'is provided with a thread 30/8' which fits into a head bore 24 which is correspondingly provided with an internal thread 17/6 ' / 1 'is screwed into the electrical insulating body 17'; To secure the connecting part 30 ', some adhesive is preferably added to this thread section 17/6', 30/8 '.
  • the coaxial extension 30/4 ' is at the combustion chamber end section of the connection part 30' with an anchoring means 30/7 '(Longitudinal or cross knurling). Due to the rotational movement when screwing the connecting part 30 'into said head bore 24/1', the plug connection shown in FIG. 1 between the knurled connecting wire 29/4 on the combustion chamber side and the blind hole 28/4 located in the head 28/2 of the connecting bolt 28 is not sure enough.
  • a ring-like contact part 32 ' is connected to the combustion chamber-side end face 29/2' of the tilting diode cascade 29 'by means of a connecting strap 32' (eg by welding); this ring-like contact part 32 'is aligned coaxially with the tilting diode cascade 29', in this exemplary embodiment preferably provided with a longitudinal slot 32/2 'and can be equipped with an outwardly widening insertion cone 32/3' to simplify assembly on the combustion chamber side; this ring-like contact part 32 'consists of spring material and has an outer diameter which is smaller than the maximum diameter of the casing 31' of the breakover diode cascade 29 '.
  • this ring-like contact part 32' is pushed tightly over a contact pin 28/5 'which extends coaxially from the connection-side end face 28/3' of the connecting bolt 28 '; this contact pin 28/5 'is provided at its connection-side end section with a tapered insertion section 28/6', which together with the insertion cone 32/3 'of the ring-like contact part 32' on the tilting diode cascade 29 'facilitates and secures the assembly.
  • a blind hole-like hexagon 30/12' is formed in the connection-side end face 30/11 'of the connection part 30'; when assembling this spark plug 10 ', a tool fits into this blind hole-like hexagon socket 30/12' and rotates the connection part 30 including the tilting diode cascade 29 ', casing 31' and ring-like contact part 32 'up to the stop of the collar 30/2' on the connection-side end face 17 / 5 'in the head bore 24/1' of the electrical insulating body 17 '.
  • the ring-like contact part 32 ' is also pushed at the combustion chamber end of the breakover diode cascade 29 'over the contact pin 28/5' on the head 28/2 'of the connecting bolt 28' and here establishes a permanent electrical connection.
  • a spark plug 10 " is described which largely corresponds to the spark plug 10 'according to FIGS. 3 and 4, but instead of an annular contact part 32' and a contact pin 28/5 'on the connecting bolt head 28/2'
  • Has spring element 33 " which in the preferred embodiment is connected to the combustion chamber end face 29/2" of the tilting diode cascade 29 "surrounded by the casing 31".
  • the spring element shown in FIGS. 5 and 6 is a strip made of resilient material, the S -shaped is used with its connection-side leg 33/1 "for connection to the tilting diode cascade 29" and its free leg 33/2 “serves as a contact element with the end face 28/3" of the connecting bolt 28 ".
  • this spark plug 10 is a U-shaped or a zigzag-shaped spring element, but disc springs or helical wire coils can also be used for this.
  • the connecting part 30" of this spark plug 10 "becomes a spark plug in this exemplary embodiment 10 "again by screwing into the head bore 24/1" of the electrical insulating body 17 ", if necessary with the addition of an adhesive or putty. Otherwise, the construction of this spark plug 10 "corresponds to the construction of the spark plug 10 'according to FIGS. 3 and 4, and the same applies accordingly to exemplary embodiment 1 according to FIGS. 1 and 2 with regard to the types of spark plugs that have other electrode shapes, electrode arrangements, different spark gaps or the like.

Landscapes

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

Abstract

Pour empêcher les shunts électriques dans la section côté chambre de combustion des bougies d'allumage pour mélanges carburant-air, et par conséquent pour produire des étincelles en permanence riches en énergie, une cascade de diodes à quatre couches (29) est incorporée dans l'alésage longitudinal (24) d'un isolateur (17). Cette cascade de diodes à quatre couches (29), conjointement avec l'écrou de connexion (30) de la bougie d'allumage (10), constitue un composant et est entourée d'une chemise électriquement isolante (31) qui vient remplir le trou oblong (24) de l'isolateur (17). Côté chambre de combustion, la cascade de diodes à quatre couches (29) est couplée électriquement à une tige de connexion (28), laquelle plonge avec sa section côté chambre de combustion dans une masse de remplissage électriquement conductrice (27) de type connu, et laquelle est par conséquent reliée à l'électrode centrale (25) de la bougie d'allumage (10). Il est décrit plusieurs formes de réalisation faciles à monter et d'un fonctionnement fiable d'une cascade de diodes à quatre couches (29) à monter dans l'isolateur (17) de bougies d'allumage (10).

Claims (16)

  1. Bougie d'allumage (10) pour l'allumage de mélanges air-carburant, avec un boîtier en métal de forme sensiblement tubulaire (11), qui possède sur sa face extérieure des moyens (12, 13, 14) pour être monté, dans une chambre de combustion, comprend dans son alésage de passage (16) un corps électriquement isolant (17) de préférence fritté, sensiblement symétrique de révolution, avec un alésage longitudinal à gradins (24) étanche et possède sur sa section terminale située du côté de la chambre de combustion, au moins une électrode à la masse, résistant à la corrosion, (15), qui se trouve en regard à une certaine distance d'une électrode centrale, résistant également à la corrosion (25), électrode à la masse qui est fixée latéralement dans la zone située du côté de la chambre de combustion de l'alésage longitudinal du corps électriquement isolant (17), repose librement par son extrémité située du côté de la chambre de combustion sur l'extrémité située du côté de la chambre de combustion du corps électriquement isolant (17), est fixée par sa section terminale, située du côté du raccordement, formant un collet (25/2), sur un appendice (24/3) dans une zone longitudinale élargie de l'alésage longitudinal (24) du corps électriquement isolant (17) dans le sens longitudinal et est rendue directement ou indirectement étanche du côté du raccordement au moyen d'une masse de remplissage électriquement conductrice (27), une section d'un axe de liaison (28), susceptible de conduire l'électricité, étant fixée en même temps dans cette masse de remplissage (27) du côté du raccordement, axe de liaison qui du côté du raccordement est relié de façon électriquement conductrice par l'intermédiaire d'une cascade de diodes à renversement (29), fonctionnant comme un commutateur de tension, à une pièce de raccordement (30) de la bougie d'allumage (10), pièce qui est fixée dans la section, située du côté du raccordement, de l'alésage longitudinal (24) du corps électriquement isolant (17) bougie d'allumage caractérisée en ce que la cascade de diodes à renversement (29) s'appuie du côté de la chambre de combustion directement ou indirectement sur l'axe de liaison (28) et est recouverte sur sa colonne (29/1) d'une enveloppe électriquement isolante (31), qui peut être enfilée par au moins une partie de sa surface périphérique de façon étanche dans la section longitudinale, située du côté du raccordement, (24/1) de l'alésage longitudinal (24) du corps électriquement isolant (17) et du côté du raccordement est fixée sur la section terminale, située du côté de la chambre de combustion, (30/4) de la pièce de raccordement (30) et est maintenue reliée électriquement.
  2. Bougie d'allumage selon la revendication 1, caractérisée en ce que la pièce de raccordement (30') présente du côté de la chambre de combustion un moyen d'ancrage (30/7') résistant aux sollicitations de torsion pour l'enveloppe (31') de la cascade de diodes à renversement (29'), par exemple un moletage longitudinal ou croisé.
  3. Bougie d'allumage selon la revendication 1 ou 2, caractérisée en ce que l'enveloppe (31) est réalisée en une matière seulement peu flexible ou en une matière élastique, par exemple une matière plastique ou une matière caoutchouteuse.
  4. Bougie d'allumage selon les revendications 1 à 3, caractérisée en ce que la liaison électrique de la cascade de diodes à renversement enveloppée est une liaison à enfichage avec la pièce de raccordement (30) et/ou l'axe de liaison (28).
  5. Bougie d'allumage selon l'une des revendications 1 à 4, caractérisée en ce qu'à partir d'au moins l'une des faces frontales (29/2, 29/3) de la cascade de diodes à renversement, enveloppée, fait saillie un fil coaxial de raccordement (29/4, 29/5).
  6. Bougie d'allumage selon la revendication 5, caractérisée en ce que le fil de raccordement, situé du côté du raccordement, (29/5) de la cascade de diodes à renversement, enveloppée, (29) est fixé dans un trou borgne (30/6) qui s'étend coaxialement dans la face frontale, située du côté de la chambre de combustion (30/5) de la pièce de raccordement (30).
  7. Bougie d'allumage selon la revendication 5, caractérisée en ce que le fil de raccordement, situé du côté de la chambre de combustion, (29/4) de la cascade de diodes à renversement, enveloppée, (29) est fixé dans un trou borgne (28/4) qui s'étend coaxialement dans la face frontale, située du côté du raccordement, (28/3) de l'axe de liaison (28).
  8. Bougie d'allumage selon la revendication 7, caractérisée en ce que l'enveloppe (31) entoure en même temps aussi la section proche de la cascade de diodes à renversement du fil de raccordement (29/4), située du côté de la chambre de combustion de la cascade de diodes à renversement (29).
  9. Bougie d'allumage selon les revendications 5 à 8, caractérisée en ce que le fil respectif de raccordement (29/4, 29/5) à enfoncer à la presse dans le trou borgne correspondant (30/6, 28/4) dans la pièce de raccordement (30) et/ou dans l'axe de liaison (28) est moleté au moins sur la section terminale.
  10. Bougie d'allumage selon les revendications 1 à 4, caractérisée en ce que la cascade de diodes à renversement (29') a du côté de la chambre de combustion une pièce de contact de type annulaire (32'), dont l'ouverture est disposée coaxialement à la cascade de diodes à renversement (29') et peut être enfilée rigidement sur un téton de contact (28/5') coaxial, formé du côté du raccordement sur l'axe de liaison (28').
  11. Bougie d'allumage selon la revendication 7, caractérisée en ce que la pièce de contact de type annulaire (32') a un cône d'introduction (32/3') qui va en s'élargissant du côté de la chambre de combustion et/ou le téton de contact coaxial (28/5') sur l'axe de liaison (28') a une section terminale (28/6') qui va en se rétrécissant du côté du raccordement.
  12. Bougie d'allumage selon les revendications 1 à 4, caractérisée en ce que l'on utilise comme moyen de liaison entre la cascade de diodes à renversement (29") et l'axe de liaison (28") un élément élastique (33") qui agit axialement.
  13. Bougie d'allumage selon la revendication 12, caractérisée en ce que l'élément élastique (33") est relié de façon solidaire à l'extrémité, située du côté de la chambre de combustion, de la cascade de diodes à renversement (29"), par exemple par soudage.
  14. Bougie d'allumage selon les revendications 1 à 13, caractérisée en ce que l'enveloppe (31) est injectée sous pression sur la cascade de diodes à renversement (29).
  15. Bougie d'allumage selon les revendications 1 à 14, caractérisée en ce que dans la section terminale, située du côté du raccordement, (24/1') de l'alésage longitudinal (24') du corps électriquement isolant (17') et/ou sur la pièce de raccordement (30/3) elle même sont prévus des moyens (17/6', 30/8, 30/8') servant à fixer la pièce de raccordement (30, 30'), par exemple des filetages, des chambres de masticage.
  16. Bougie d'allumage selon les revendications 1 à 15, caractérisée en ce que son trajet d'étincelle (26) est un trajet d'étincelle dans l'air ou un trajet d'étincelle glissante ou un trajet combiné d'étincelle dans l'air et d'étincelle glissante.
EP92911138A 1991-06-22 1992-06-17 Bougie d'allumage pour l'allumage de melanges carburant-air Expired - Lifetime EP0591250B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4120659A DE4120659A1 (de) 1991-06-22 1991-06-22 Zuendkerze zum zuenden von kraftstoff-luft-gemischen
DE4120659 1991-06-22
PCT/DE1992/000496 WO1993000731A1 (fr) 1991-06-22 1992-06-17 Bougie d'allumage pour l'allumage de melanges carburant-air

Publications (2)

Publication Number Publication Date
EP0591250A1 EP0591250A1 (fr) 1994-04-13
EP0591250B1 true EP0591250B1 (fr) 1996-03-06

Family

ID=6434530

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92911138A Expired - Lifetime EP0591250B1 (fr) 1991-06-22 1992-06-17 Bougie d'allumage pour l'allumage de melanges carburant-air

Country Status (10)

Country Link
EP (1) EP0591250B1 (fr)
JP (1) JP3373202B2 (fr)
KR (1) KR940701594A (fr)
BR (1) BR9206181A (fr)
CZ (1) CZ281015B6 (fr)
DE (2) DE4120659A1 (fr)
ES (1) ES2085016T3 (fr)
HU (1) HU215726B (fr)
PL (1) PL168237B1 (fr)
WO (1) WO1993000731A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3173056A (en) * 1960-08-11 1965-03-09 Stackpole Carbon Co Spark plug containing electrical resistor
US3603835A (en) * 1970-01-14 1971-09-07 Champion Spark Plug Co Spark plug with an internal resistor
US4308487A (en) * 1980-01-30 1981-12-29 Feaster James L Dual internal electric spark plug
DE3731393A1 (de) * 1987-09-18 1989-04-06 Bosch Gmbh Robert Hochspannungsschalter

Also Published As

Publication number Publication date
HUT67447A (en) 1995-04-28
CZ283193A3 (en) 1994-04-13
KR940701594A (ko) 1994-05-28
BR9206181A (pt) 1995-10-10
DE4120659A1 (de) 1992-12-24
ES2085016T3 (es) 1996-05-16
DE59205614D1 (de) 1996-04-11
HU215726B (hu) 1999-02-01
JPH06509204A (ja) 1994-10-13
WO1993000731A1 (fr) 1993-01-07
JP3373202B2 (ja) 2003-02-04
PL168237B1 (pl) 1996-01-31
HU9303646D0 (en) 1994-04-28
CZ281015B6 (cs) 1996-05-15
EP0591250A1 (fr) 1994-04-13

Similar Documents

Publication Publication Date Title
EP0049372B1 (fr) Bougie pour moteurs à combustion interne
EP0304038B1 (fr) Unité d'allumage pour moteurs à combustion
DE69030809T2 (de) Verbrennungszünder
DE10227371A1 (de) Herstellungsverfahren für Zündkerze mit piezoelektrischem Sensor und damit hergestellte Zündkerze
DE19743544A1 (de) Zündeinrichtung für eine Brennkraftmaschine
EP0226595B1 (fr) Bougie pour moteurs a combustion interne
DE69935641T2 (de) Glühensensor- und - Motorteilkombination
EP1518283B1 (fr) Pole de raccordement d'un accumulateur
DE102007050634A1 (de) Zündkerze
EP0101547B1 (fr) Bougie d'allumage à haute tension
DE2725196A1 (de) Zuendkerze
EP0591250B1 (fr) Bougie d'allumage pour l'allumage de melanges carburant-air
EP0103775B1 (fr) Bougie d'allumage à tige incandescente pour moteur à combustion interne
DE9107708U1 (de) Zündkerze zum Zünden von Kraftstoff-Luft-Gemischen
EP0194292A1 (fr) Bougie-crayon de chauffage pour moteurs a combustion interne
WO2000007270A1 (fr) Bougie pour moteur a combustion interne
EP0106232B1 (fr) Bougie à incandescence pour moteurs à combustion interne avec allumage externe
DE3616667C2 (de) Zündkerze mit quergeteiltem Isolator
DE1119598B (de) Zweipolige Gluehstiftkerze fuer Brennkraftmaschinen
DE3533123A1 (de) Zuendkerze mit gleitfunkenstrecke
DE1204018B (de) Anordnung des Zuendkabelanschlusses an einer Zuendkerze
DE4237444A1 (de) Elektrisch beheizte Zündkerze zum Zünden von Kraftstoff-Luft-Gemischen
DE3616639A1 (de) Zuendkerze fuer brennkraftmaschinen
DE9101496U1 (de) Hochspannungszündkerze
DE9215100U1 (de) Elektrisch beheizte Zündkerze zum Zünden von Kraftstoff-Luft-Gemischen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19931123

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB IT SE

17Q First examination report despatched

Effective date: 19950302

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT SE

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19960311

REF Corresponds to:

Ref document number: 59205614

Country of ref document: DE

Date of ref document: 19960411

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2085016

Country of ref document: ES

Kind code of ref document: T3

ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19980625

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19980630

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 19990618

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19990629

EUG Se: european patent has lapsed

Ref document number: 92911138.3

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20010601

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20020611

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20020622

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030617

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20030725

Year of fee payment: 12

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20030617

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040227

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050617