EP0268528B1 - Zündanlage für Brennkraftmaschine - Google Patents

Zündanlage für Brennkraftmaschine Download PDF

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Publication number
EP0268528B1
EP0268528B1 EP87402524A EP87402524A EP0268528B1 EP 0268528 B1 EP0268528 B1 EP 0268528B1 EP 87402524 A EP87402524 A EP 87402524A EP 87402524 A EP87402524 A EP 87402524A EP 0268528 B1 EP0268528 B1 EP 0268528B1
Authority
EP
European Patent Office
Prior art keywords
thyristor
diode
ignition device
spark plug
zener
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
EP87402524A
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English (en)
French (fr)
Other versions
EP0268528A1 (de
Inventor
Gérard Georges Vassal
Jean-Marie Lucien Lazzarini
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen 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 Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0268528A1 publication Critical patent/EP0268528A1/de
Application granted granted Critical
Publication of EP0268528B1 publication Critical patent/EP0268528B1/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
    • F02P9/00—Electric spark ignition control, not otherwise provided for
    • F02P9/002—Control of spark intensity, intensifying, lengthening, suppression
    • 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
    • H01T15/00—Circuits specially adapted for spark gaps, e.g. ignition circuits

Definitions

  • Electromagnetic ignition devices are commonly used for rich mixtures but they are not suitable, by themselves, for ensuring the ignition of poor mixtures because the electric current delivered instantaneously is not sufficient.
  • the addition of a spark gap, placed in the air, in series with the spark plug, makes it possible to satisfy to a certain extent the condition indicated above, because of its discontinuous electrical characteristic.
  • the disadvantages of this solution are numerous: electromagnetic disturbances and dangers due to the arc, wear, unstable ignition voltage and above all, significant consumption of electrical energy intended for the spark plug (sometimes 50%).
  • Patent FR-A-2 418 419 describes a device intended for the ignition of an oil burner and intended to prevent fouling of the electrodes and the heating of the components.
  • This device comprises in its low voltage circuit a thyristor and a Zener diode which is, moreover, connected to the trigger of the thyristor.
  • This device which is of the capacitive type, is not applicable to an internal combustion engine and, in any case, does not produce an arc of sufficient duration to burn a lean air-petrol mixture.
  • US-A-4,411,247 describes a device for ensuring the static distribution of high voltage to the spark plugs of a four-cylinder engine and which consists of avalanche diodes formed of a series of chips and each interposed between the high voltage and one of the candles.
  • the subject of the present invention is an ignition device for a combustion engine using so-called “poor” air-gasoline mixtures capable of applying to the terminals of a “spark plug” a high-voltage electrical energy source capable of instantly delivering the current electrical necessary for ignition and good combustion of the mixture, and which does not have the various drawbacks mentioned above.
  • This device is characterized in that it comprises in the high voltage circuit, in series with the spark plug, a Zener diode and a thyristor in parallel with which is connected a directly conducting Zener diode in the opposite direction to that where the thyristor is conducting, this Zener diode being further connected to the trigger of the thyristor, the Zener diodes being directly passing in opposite directions.
  • FIG. 1 we see a candle 1 connected to a high voltage electrical energy source constituted here by the secondary of a coil 2.
  • the primary of this coil is connected at one of its ends at 3, to the pole positive of a battery and at its other end to ground, via a transistor 4 controlled by means 5.
  • asymmetrical bidirectional conduction means comprising a thyristor TH1, a Zener diode DZ1 and a resistor R1.
  • the thyristor TH1 is arranged so as to be passing in the direction going from the secondary of the coil 2 to the spark plug, when it is ordered;
  • the Zener diode is arranged in the opposite direction, in parallel with the thyristor, so as to be directly conductive in the direction going from the spark plug at the secondary of the coil, its end facing the spark plug 1 being connected to the trigger of the thyristor TH1 and, via the resistor R1 to the spark plug 1.
  • the means connecting the secondary of the coil 2 to the spark plug 1 are bidirectional in the sense that the electric current can flow from the coil to the spark plug as well. But they are asymmetrical because the conduction of the current is not done with the same voltage drop in both directions. In the direction from the coil to the spark plug, the device behaves like a self-controlled thyristor whereas, in the opposite direction, it behaves like a simple diode, except for resistance R1.
  • the low value resistance R1 makes it possible to adjust the tripping current of the thyristor; moreover it protects the trigger of the thyristor during the reversal of polarity of the high voltage.
  • An auxiliary Zener diode DZ a is interposed between the coil 2 on the one hand, and the thyristor TH1 and the Zener diode DZ1 on the other hand. This diode prevents any parasitic spark in the spark plug at the time of the earthing of the primary of the coil 2 by the transistor 4, during the charging of this coil.
  • the Zener voltage of the diode DZ1 must be at least of the order of 1 KV. But the Zener voltage of the device can be as large as necessary; it suffices to stack a series of elements as shown in Figure 3 in which we see two Zener diodes DZ1 and DZ2 each associated with a thyristor TH1 or TH2 and a resistor R1 or R2.
  • the thyristor trigger can be protected, in the event of polarity reversal of the high voltage, by a diode D1 connected in parallel with the resistor R1, as shown in Figure 4.
  • the spark plug 1 provided with a connection pad 1 a , the coil 2 provided with a connection pad 2 b , and the various components such as 9 a, 9 b , 9 c and 9 d fixed on a printed circuit 10, can be stored in an insulating box 11, as shown in Figures 5 and 6, so as to form a unitary assembly, this allows easily insert the device into the high voltage spark plug harness.
  • the device according to the invention behaves like a spark gap but does not cause a spark.
  • the electromagnetic disturbances are therefore negligible.
  • the ignition voltage is constant over time.
  • the voltage drop after ignition of the thyristor is negligible and the energy consumed by the device is therefore negligible.
  • the device is self-triggered as soon as the voltage across its terminals is sufficient.

Landscapes

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

Claims (4)

  1. Zündanlage für Brennkraftmaschinen, die sogenannte "arme" Brennstoff-Gemische verwenden, welche geeignet ist, an die Klemmen einer Zündkerze (1) eine Quelle (2) elektrischer Energie hoher Spannung anzulegen, die sofort den Strom liefern kann, der für die Zündung und eine gute Verbrennung des Gemisches erforderlich ist, dadurch gekennzeichnet, daß sie in dem Hochspannungskreis in Reihe mit der Zündkerze (1) eine erste Zener-Diode (DZa) und einen Thyristor (TH₁) aufweist, an den in Parallelschaltung eine zweite Zener-Diode (DZ₁) angeschlossen ist, die direkt leitend ist in entgegengesetzter Richtung zu der Richtung, in der der Strom den Thyristor durchfließt, wobei diese zweite Zener-Diode außerdem an die Steuerelektrode des Thyristors angeschlossen ist und die beiden Zener-Dioden (DZ₁ und DZa) in einander entgegengesetzten Richtungen direkt vom Strom durchflossen werden.
  2. Zündanlage nach Anspruch 1, gekennzeinet durch einen Widerstand (R₁), der in Reihe mit der zweiten Zener-Diode (DZ₁) geschaltet ist.
  3. Zündanlage nach Anspruch 2, gekennzeinet durch eine Diode (D₁), die parallel zum Widerstand (R₁) geschaltet ist, wobei die Diode (D₁) und die zweite Zener-Diode (DZ₁) in derselben Richtung vom Strom durchflossen werden.
  4. Zündanlage nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß sie eine Reihe von Einheiten von Zener-Dioden (DZ₁, DZ₂) und von gestapelten Thyristoren (TH₁, TH₂) aufweist.
EP87402524A 1986-11-18 1987-11-09 Zündanlage für Brennkraftmaschine Expired - Lifetime EP0268528B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8616348 1986-11-18
FR8616348A FR2606833B1 (fr) 1986-11-18 1986-11-18 Dispositif d'allumage pour moteur a combustion

Publications (2)

Publication Number Publication Date
EP0268528A1 EP0268528A1 (de) 1988-05-25
EP0268528B1 true EP0268528B1 (de) 1992-02-19

Family

ID=9341145

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87402524A Expired - Lifetime EP0268528B1 (de) 1986-11-18 1987-11-09 Zündanlage für Brennkraftmaschine

Country Status (3)

Country Link
EP (1) EP0268528B1 (de)
DE (1) DE3776759D1 (de)
FR (1) FR2606833B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3936174A1 (de) * 1989-10-31 1991-05-02 Bayerische Motoren Werke Ag Kontaktlose zuendanlage fuer brennkraftmaschinen
DE4117808C2 (de) * 1991-05-31 1994-09-22 Bosch Gmbh Robert Zündanlagen für Brennkraftmaschinen mit Hochspannungsschalter
FR2835886B1 (fr) * 2002-02-08 2004-11-12 Johnson Contr Automotive Elect Module electronique pour bobine d'allumage de moteur a combustion interne

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4411247A (en) * 1980-04-24 1983-10-25 Sanke Electric Co., Ltd. Distributorless ignition system for multicylinder internal-combustion engines

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1077004A (en) * 1963-05-01 1967-07-26 Rotax Ltd Spark ignition apparatus
US3939814A (en) * 1975-01-10 1976-02-24 Energy Innovations Device for prolonging ignition spark
JPS54115975A (en) * 1978-02-28 1979-09-08 Yamatake Honeywell Co Ltd Ignition device for oil burner
JPS58126462A (ja) * 1982-01-25 1983-07-27 Yasuhiro Naruse バツテリ−式点火装置における、相互誘導作用による交流逆起電力を強くする同調電子回路
YU164582A (en) * 1982-07-28 1985-04-30 Esref Halilovic Self-inductive ionization energy commutator of high voltage impulses of an ignition system of carburettor motors
JPS60187769A (ja) * 1984-03-08 1985-09-25 Nissan Motor Co Ltd 内燃機関用点火装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4411247A (en) * 1980-04-24 1983-10-25 Sanke Electric Co., Ltd. Distributorless ignition system for multicylinder internal-combustion engines

Also Published As

Publication number Publication date
DE3776759D1 (de) 1992-03-26
FR2606833B1 (fr) 1989-02-24
EP0268528A1 (de) 1988-05-25
FR2606833A1 (fr) 1988-05-20

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