EP0002646A1 - Ignition device with inductive discharge - Google Patents

Ignition device with inductive discharge Download PDF

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Publication number
EP0002646A1
EP0002646A1 EP78400250A EP78400250A EP0002646A1 EP 0002646 A1 EP0002646 A1 EP 0002646A1 EP 78400250 A EP78400250 A EP 78400250A EP 78400250 A EP78400250 A EP 78400250A EP 0002646 A1 EP0002646 A1 EP 0002646A1
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EP
European Patent Office
Prior art keywords
circuit
transistor
switch
controlling
transformer
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.)
Withdrawn
Application number
EP78400250A
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German (de)
French (fr)
Inventor
Robert Hocq
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.)
Interlight SA
Original Assignee
Interlight 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 Interlight SA filed Critical Interlight SA
Publication of EP0002646A1 publication Critical patent/EP0002646A1/en
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q3/00—Igniters using electrically-produced sparks
    • F23Q3/004—Using semiconductor elements

Definitions

  • the present invention relates to an electric ignition device by inductive discharge usable for the production of sparks and more particularly for the production of sparks in igniters or lighters for smokers.
  • the present invention proposes to remedy these drawbacks and to provide an electric ignition device by inductive discharge in which the number of inductors is reduced, which simplifies the construction, reduces the cost price, increases the efficiency and reduces the causes of failure.
  • the invention also makes it possible to reduce the bulk for increased reliability.
  • the inv tion intends to significantly limit the consumption of the battery in the event that an external cause prevents the formation of sparks.
  • the subject of the invention is an electric ignition device by inductive discharge comprising a voltage source such as for example a battery, voltage raising means for supplying a spark gap and a switch for controlling the operation of the circuit and the production of sparks, characterized in that it comprises a single wound component acting as transformer and an electronic control circuit consisting of a static switch controlled by electronic means to control the actuation of said transformer.
  • a voltage source such as for example a battery
  • voltage raising means for supplying a spark gap
  • a switch for controlling the operation of the circuit and the production of sparks
  • the device comprises a capacitor-reservoir supplied by the battery and which replaces the battery when it is charged at the same voltage (that of the battery), to supply the discharge circuit.
  • the electronic means for controlling the static switch comprise a monostable or astable multivibrator controlled by the closing of the switch.
  • a recovery diode placed at the terminals of the static switch when the latter is produced in the form of a transistor to reduce the consumption of the circuit in the event that an external cause comes to prevent the formation of Sparks.
  • the presence of the capacitor also makes it possible to use a resistor placed in series with the battery to limit the peak value of the current delivered by the battery and therefore limit the phenomena of polarization of the electrodes thereof.
  • the circuit according to the invention comprises a battery 1 comprising for example a single element of electromotive force of about 1.5 v, one terminal of which is connected to earth at 2 while the other terminal is connected by a conductor 3 ' to a mechanical switch 4 which can advantageously be connected by a connecting member to the valve gas control if the device is incorporated in a gas lighter.
  • the switch is connected to its other terminal by a conductor 5 to a capacitor 6, said capacitor being connected to earth.
  • a derivation of the conductor 5 also leads to the primary winding 7 of a transformer whose self inductance is calculated in such a way that, traversed by the current supplied by the capacitor 6, it stores sufficient energy of the order of 10 mJ to ignite the fuel mixture.
  • the primary of the transformer 7 is magnetically coupled to a secondary winding 8 with a transformation ratio chosen as a function of the value of the overvoltage which appears at the edge of the primary winding.
  • the two terminals of the secondary winding 8 are connected by suitable conductors to a spark gap 9 where the sparks appear.
  • the supply of the primary winding 7 by the capacitor 6 is controlled by a static switch consisting of an NPN transistor operating in saturation mode.
  • the emitter of the transistor is connected to earth.
  • the transistor is protected against reverse voltages by a diode 11, the speed of the rise of the voltage at these terminals being determined by a capacitor 12 also placed in bypass.
  • the base of the transistor is connected to an electronic device for controlling the opening of the transistor represented as a whole by 13.
  • This device is controlled by a conductor 14 coming from the switch 4 and connected to earth.
  • This device 13 can for example consist of a monostable multivibrator or an astable multivibrator.
  • resistor 15 can be inserted in series with the battery 1 for a purpose which will appear later.
  • the excitation of the primary winding 7 causes, by magnetic coupling, the production of a high voltage pulse in the winding 8 and causes the bursting of a spark across the spark gap 9.
  • the resistor 15 inserted in series with the battery makes it possible to limit the maximum value of the charging current of the capacitor 6 and thus avoids the phenomena of polarization of the electrodes of the battery.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

Device for electric lighting by inductive discharge, comprising a source (1) of voltage, means (7, 8) for raising voltage, for feeding a discharger (9) and a switch (4) for controlling the functioning of the circuit and the production of sparks. It comprises a single wound component (7, 8) acting as transformer and an electronic control circuit constituted by a static switch (10) controlled by electronic means (13) for controlling the operation of said transformer. The invention can be used in lighters for smokers. <IMAGE>

Description

La présente invention a pour objet un dispositif d'allumage électrique par décharge inductive utilisable pour la production d'étincelles et plus particulièrement pour la production d'étincelles dans des allumeurs ou briquets pour fumeurs.The present invention relates to an electric ignition device by inductive discharge usable for the production of sparks and more particularly for the production of sparks in igniters or lighters for smokers.

Il existe déjà de nombreux systèmes d'allumage pour briquets électriques cu électroniques alimentés par piles, basés sur le principe de la décharge capacitive. Ces circuits nécessitent l'utilisation de convertisseurs de tension destinés à élever la tension de la pile à une valeur suffisante pour emmagasiner l'énergie sous forme électro-statique dans un condensateur. Il est donc nécessaire d'utiliser, outre le transformateur-élévateur de tension final, un ou plusieurs transformateurs ou inductances dans la réalisation du convertisseur de tension, ce qui multiplie le nombre de micro-bobinages encombrants, onéreux et souvent causes de panne. La multiplication du nombre d'inductances conduit également à une diminution du rendement global.There are already many ignition systems for electric or electronic lighters powered by batteries, based on the principle of capacitive discharge. These circuits require the use of voltage converters intended to raise the voltage of the battery to a value sufficient to store energy in electro-static form in a capacitor. It is therefore necessary to use, in addition to the final step-up transformer, one or more transformers or inductors in the production of the voltage converter, which multiplies the number of bulky, expensive micro-windings and often causes of failure. The multiplication of the number of inductors also leads to a reduction in the overall yield.

La présente invention se propose de remédier à ces inconvénients et de fournir un dispositif d'allumage électrique par décharge inductive dans lequel le nombre d'inductances se trouve diminué, ce qui simplifie la construction, diminue le prix de revient, augmente le rendement et réduit les causes de panne. L'invention permet de plus de diminuer l'encombrement pour une fiabilité accrue. En outre l'invention se propose de limiter notablement la consommation de la pile dans le cas où une cause extérieure empêcherait la formation d'étincelles.The present invention proposes to remedy these drawbacks and to provide an electric ignition device by inductive discharge in which the number of inductors is reduced, which simplifies the construction, reduces the cost price, increases the efficiency and reduces the causes of failure. The invention also makes it possible to reduce the bulk for increased reliability. Furthermore the inv tion intends to significantly limit the consumption of the battery in the event that an external cause prevents the formation of sparks.

L'invention a pour objet un dispositif d'allumage électrique par décharge inductive comprenant une source de tension telle que par exemple une pile, des moyens élévateurs de tension pour alimenter un éclateur et un interrupteur pour commander le fonctionnement du circuit et la production d'étincelles, caractérisé par le fait qu'il comporte un composant bobiné unique agissant comme transformateur et un circuit de commande électronique constitué d'un interrupteur statique contrôlé par des moyens électroniques pour commander l'actionnement dudit transformateur.The subject of the invention is an electric ignition device by inductive discharge comprising a voltage source such as for example a battery, voltage raising means for supplying a spark gap and a switch for controlling the operation of the circuit and the production of sparks, characterized in that it comprises a single wound component acting as transformer and an electronic control circuit consisting of a static switch controlled by electronic means to control the actuation of said transformer.

Dans une forme de réalisation préférée le dispositif comporte un condensateur-réservoir alimenté par la pile et qui se substitue, à la pile lorsqu'il est chargé à la même tension (celle de la pile), pour alimenter le circuit de décharge.In a preferred embodiment the device comprises a capacitor-reservoir supplied by the battery and which replaces the battery when it is charged at the same voltage (that of the battery), to supply the discharge circuit.

De façon avantageuse les moyens électroniques de contrôle de l'interrupteur statique, réalisé par exemple par un transistor, comprennent un multivibrateur monostable ou astable commandé par la fermeture de l'interrupteur.Advantageously, the electronic means for controlling the static switch, produced for example by a transistor, comprise a monostable or astable multivibrator controlled by the closing of the switch.

Selon un perfectionnement de l'invention on peut prévoir une diode de récupération placée aux bornes de l'interrupteur statique lorsque celui-ci est réalisé sous forme de transistor pour diminuer la consommation du circuit au cas où une cause extérieure vient empêcher la formation d'étincelles. La présence du condensateur permet également d'utiliser une résistance placée en série avec la pile pour limiter la valeur de crête du courant délivré par la pile et donc limiter les phénomènes de polarisation des électrodes de celle-ci.According to an improvement of the invention, it is possible to provide a recovery diode placed at the terminals of the static switch when the latter is produced in the form of a transistor to reduce the consumption of the circuit in the event that an external cause comes to prevent the formation of Sparks. The presence of the capacitor also makes it possible to use a resistor placed in series with the battery to limit the peak value of the current delivered by the battery and therefore limit the phenomena of polarization of the electrodes thereof.

D'autres avantages et caractéristiques de l'invention apparaîtront à la lecture de la description suivante, faite à titre d'exemple non limitatif et se référant au dessin annexé dans lequel :

  • la figure unique représente un circuit schématique du dispositif selon l'invention.
Other advantages and characteristics of the invention will appear on reading the following description, given by way of nonlimiting example and referring to the appended drawing in which:
  • the single figure represents a schematic circuit of the device according to the invention.

Le circuit selon l'invention comporte une pile 1 comprenant par exemple un seul élément de force électromotrice de l'ordre de 1,5 v dont une borne est reliée à la terre en 2 alors que l'autre borne est reliée par un conducteur 3 ' à un interrupteur mécanique 4 qui peut'avantageusement être relié par un organe de liaison à la soupape de commande du gaz dans le cas où le dispositif est incorporé dans un briquet à gaz. L'interrupteur est relié à son autre borne par un conducteur 5 à un condensateur 6, ledit condensateur étant relié à la terre. Une dérivation du conducteur 5 conduit par ailleurs à l'enroulement primaire 7 d'un transformateur dont la self inductance, est calculée de manière telle que, parcouru par le courant fourni par le condensateur 6, il emmagasine une énergie suffisante de l'ordre de 10 mJ pour provoquer l'allumage du mélange combustible. Le primaire du transformateur 7 est couplé magnétiquement à un enroulement secondaire 8 avec un rapport de transformation choisi en fonction de la valeur de la surtension qui apparaît au bord de l'enroulement primaire. Les deux bornes de l'enroulement secondaire 8 sont reliées par des conducteurs convenables à un éclateur 9 où apparaissent les étincelles.The circuit according to the invention comprises a battery 1 comprising for example a single element of electromotive force of about 1.5 v, one terminal of which is connected to earth at 2 while the other terminal is connected by a conductor 3 ' to a mechanical switch 4 which can advantageously be connected by a connecting member to the valve gas control if the device is incorporated in a gas lighter. The switch is connected to its other terminal by a conductor 5 to a capacitor 6, said capacitor being connected to earth. A derivation of the conductor 5 also leads to the primary winding 7 of a transformer whose self inductance is calculated in such a way that, traversed by the current supplied by the capacitor 6, it stores sufficient energy of the order of 10 mJ to ignite the fuel mixture. The primary of the transformer 7 is magnetically coupled to a secondary winding 8 with a transformation ratio chosen as a function of the value of the overvoltage which appears at the edge of the primary winding. The two terminals of the secondary winding 8 are connected by suitable conductors to a spark gap 9 where the sparks appear.

L'alimentation de l'enroulement primaire 7 par le condensateur 6 est commandée par un interrupteur statique constitué d'un transistor NPN fonctionnant en régime de saturation. L'émetteur du transistor est relié à la terre. Le transistor est protégé contre les tensions inverses par une diode 11, la vitesse de la remontée de la tension à ces bornes étant déterminée par un condensateur 12 également placé en dérivation.The supply of the primary winding 7 by the capacitor 6 is controlled by a static switch consisting of an NPN transistor operating in saturation mode. The emitter of the transistor is connected to earth. The transistor is protected against reverse voltages by a diode 11, the speed of the rise of the voltage at these terminals being determined by a capacitor 12 also placed in bypass.

La base du transistor est reliée à un dispositif électronique de contrôle de l'ouverture du transistor représenté dans son ensemble par 13. Ce dispositif est commandé par un conducteur 14 en provenance de l'interrupteur 4 et relié à la terre. Ce dispositif 13 peut être par exemple constitué d'un multivibrateur monostable ou d'un multivibrateur astable.The base of the transistor is connected to an electronic device for controlling the opening of the transistor represented as a whole by 13. This device is controlled by a conductor 14 coming from the switch 4 and connected to earth. This device 13 can for example consist of a monostable multivibrator or an astable multivibrator.

Enfin une résistance 15 peut être insérée en série avec la pile 1 dans un but qui apparaîtra plus loin.Finally a resistor 15 can be inserted in series with the battery 1 for a purpose which will appear later.

Le fonctionnement du dispositif est le suivant :

  • Lorsque l'utilisateur ferme l'interrupteur 4 la pile débite, au besoin à travers la résistance 15 si celle-ci est présente, et se trouve reliée à la capacité 6 tout en commandant le fonctionnement du monostabl,e 13. L'actionnement du monostable provoque une impulsion d'une durée déterminée à l'avance et suffisante pour permettre une bonne magnétisation du circuit du transformateur. Cette durée est avantageusement limitée à une valeur de l'ordre de deux à trois fois la constante de temps d'établissement du courant dans l'enroulement primaire 7 et le transistor 10. Pendant que le transistor 10 est ainsi actionné le courant s'établit en provenance du condensateur, dans l'enroulement primaire 7 qui emmagasine une énergie suffisante pour provoquer l'allumage du mélange combustible. A la fin de l'impulsion de commande lorsque le transistor 10 retourne à l'état bloqué, il apparaît une surtension aux bornes de l'enroulement primaire 7 qui est de l'ordre de la valeur de la force électromotrice de la pile multipliée par le coefficient de surtension du circuit constitué par l'enroulement primaire 7 et le condensateur 12.
The operation of the device is as follows:
  • When the user closes the switch 4, the cell delivers, if necessary through the resistor 15 if this is present, and is connected to capacity 6 while controlling the operation of the monostable, e 13. The actuation of the monostable causes an impulse of a duration determined in advance and sufficient to allow good magnetization of the transformer circuit. This duration is advantageously limited to a value of the order of two to three times the time constant for establishing the current in the primary winding 7 and the transistor 10. While the transistor 10 is thus actuated, the current is established. coming from the capacitor, in the primary winding 7 which stores sufficient energy to cause the ignition of the fuel mixture. At the end of the control pulse when the transistor 10 returns to the off state, an overvoltage appears at the terminals of the primary winding 7 which is of the order of the value of the electromotive force of the battery multiplied by the overvoltage coefficient of the circuit formed by the primary winding 7 and the capacitor 12.

De ce fait l'excitation de l'enroulement primaire 7 provoque par le couplage magnétique la production d'une impulsion de haute tension dans l'enroulement 8 et provoque l'éclatement d'une étincelle aux bornes de l'éclateur 9.As a result, the excitation of the primary winding 7 causes, by magnetic coupling, the production of a high voltage pulse in the winding 8 and causes the bursting of a spark across the spark gap 9.

Si au lieu d'utiliser un multivibrateur monostable on utilisait un multivibrateur astable on obtiendrait alors une série d'étincelles pendant toute la durée pendant laquelle l'intérrupteur 4 est fermé à condition de choisir convenablement la période de récurrence d'un tel multivibrateur astable de façon que l'intervalle de temps séparant deux impulsions successives soit suffisant pour permettre la recharge complète du condensateur 6 par la pile.If instead of using a monostable multivibrator one used an astable multivibrator one would then obtain a series of sparks during all the duration during which the switch 4 is closed on condition of appropriately choosing the period of recurrence of such an astable multivibrator of so that the time interval separating two successive pulses is sufficient to allow the complete recharging of the capacitor 6 by the battery.

La résistance 15 insérée en série avec la pile permet de limiter la valeur maximale du courant de charge du condensateur 6 et évite ainsi les phénomènes de polarisation des électrodes de la pile.The resistor 15 inserted in series with the battery makes it possible to limit the maximum value of the charging current of the capacitor 6 and thus avoids the phenomena of polarization of the electrodes of the battery.

Bien que l'invention ait été décrite à propos d'une forme de réalisation particulière il est bien entendu qu'elle n'est nullement limitée et qu'on peut lui apporter diverses modifications sans pour cela s'éloigner ni de son cadre ni de son esprit.Although the invention has been described in connection with a particular embodiment, it is understood that it is in no way limited and that various modifications can be made to it without departing from its scope or his mind.

Claims (7)

1. Dispositif d'allumage éléctrique par décharge inductive comprenant une source de tension, des moyens élévateurs de tension pour alimenter un éclateur et un interrupteur pour commander le fonctionnement du circuit et la production d'étincelles, caractérisé par le fait qu'il comporte un composant bobiné unique agissant comme transformateur pour emmagasiner l'énergie de la décharge, et un circuit de commande électronique constitué d'un interrupteur statique commandé par des moyens électroniques pour commander l'actionnement dudit transformateur.1. Electric ignition device by inductive discharge comprising a voltage source, voltage raising means for supplying a spark gap and a switch for controlling the operation of the circuit and the production of sparks, characterized in that it comprises a single wound component acting as a transformer to store the energy of the discharge, and an electronic control circuit consisting of a static switch controlled by electronic means to control the actuation of said transformer. 2. Dispositif selon la revendication 1, caractérisé par le fait qu'il comporte un condensateur-réservoir alimenté par la pile pour alimenter le circuit de décharge du dispositif.2. Device according to claim 1, characterized in that it comprises a capacitor-reservoir supplied by the battery to supply the discharge circuit of the device. 3. Dispositif selon l'une quelconque des revendications 1 et 2, caractérisé par le fait que l'interrupteur statique est constitué par un transistor.3. Device according to any one of claims 1 and 2, characterized in that the static switch is constituted by a transistor. 4. Dispositif selon la revendication 3, caractérisé par le fait qu'une diode de récupération est placée aux bornes dudit transistor pour diminuer la consommation du circuit en cas d'empêchement de la formation d'étincelles.4. Device according to claim 3, characterized in that a recovery diode is placed across said transistor to reduce the consumption of the circuit in the event of prevention of the formation of sparks. 5. Dispositif selon l'une quelconque des revendications 3 et 4, caractérisé par le fait qu'il comporte un condensateur relié aux bornes du transistor.5. Device according to any one of claims 3 and 4, characterized in that it comprises a capacitor connected to the terminals of the transistor. 6. Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé par le fait que les moyens électroniques de contrôle de l'interrupteur statique comprennent un multivibrateur monostable ou astable commandé par la fermeture de l'interrupteur de commande du fonctionnement du circuit.6. Device according to any one of claims 1 to 5, characterized in that the electronic means for controlling the static switch comprise a monostable or astable multivibrator controlled by the closing of the switch for controlling the operation of the circuit. 7. Dispositif selon l'une quelconque des revendications précédentes, caractérisé par le fait qu'il comporte une résistance placée en série avec la source de courant pour limiter la valeur de crête de courant délivré par celle-ci.7. Device according to any one of the preceding claims, characterized in that it comprises a resistor placed in series with the current source to limit the peak value of current delivered by the latter.
EP78400250A 1977-12-21 1978-12-20 Ignition device with inductive discharge Withdrawn EP0002646A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7738585 1977-12-21
FR7738585A FR2412969A1 (en) 1977-12-21 1977-12-21 INDUCTIVE DISCHARGE IGNITION DEVICE

Publications (1)

Publication Number Publication Date
EP0002646A1 true EP0002646A1 (en) 1979-06-27

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Application Number Title Priority Date Filing Date
EP78400250A Withdrawn EP0002646A1 (en) 1977-12-21 1978-12-20 Ignition device with inductive discharge

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EP (1) EP0002646A1 (en)
JP (1) JPS5489877A (en)
BR (1) BR7808346A (en)
FR (1) FR2412969A1 (en)
IT (1) IT1101192B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0415240A2 (en) * 1989-08-30 1991-03-06 VOGT electronic Aktiengesellschaft Ignition system for a combustion engine
CN102809173A (en) * 2011-06-01 2012-12-05 王小南 New-energy lighter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3781649A (en) * 1972-07-31 1973-12-25 Diamond Electric Mfg High voltage pulse generating apparatus
FR2244279A1 (en) * 1973-09-18 1975-04-11 Mansei Kogyo Kk
DE2360999A1 (en) * 1973-12-07 1975-06-12 Wieden & Co Gmbh Electrically ignitable gas lighter - uses small high-power battery and thyristor control

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3781649A (en) * 1972-07-31 1973-12-25 Diamond Electric Mfg High voltage pulse generating apparatus
FR2244279A1 (en) * 1973-09-18 1975-04-11 Mansei Kogyo Kk
DE2360999A1 (en) * 1973-12-07 1975-06-12 Wieden & Co Gmbh Electrically ignitable gas lighter - uses small high-power battery and thyristor control

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0415240A2 (en) * 1989-08-30 1991-03-06 VOGT electronic Aktiengesellschaft Ignition system for a combustion engine
EP0415240A3 (en) * 1989-08-30 1993-07-07 Vogt Electronic Aktiengesellschaft Ignition system for a combustion engine
CN102809173A (en) * 2011-06-01 2012-12-05 王小南 New-energy lighter
CN102809173B (en) * 2011-06-01 2016-08-10 王小南 New energy lighter

Also Published As

Publication number Publication date
IT1101192B (en) 1985-09-28
IT7831059A0 (en) 1978-12-20
FR2412969A1 (en) 1979-07-20
JPS5489877A (en) 1979-07-17
BR7808346A (en) 1979-08-07

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