EP0742369A1 - Auslöscheschaltung für Zündvorrichtung - Google Patents

Auslöscheschaltung für Zündvorrichtung Download PDF

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Publication number
EP0742369A1
EP0742369A1 EP96107607A EP96107607A EP0742369A1 EP 0742369 A1 EP0742369 A1 EP 0742369A1 EP 96107607 A EP96107607 A EP 96107607A EP 96107607 A EP96107607 A EP 96107607A EP 0742369 A1 EP0742369 A1 EP 0742369A1
Authority
EP
European Patent Office
Prior art keywords
terminal
circuit according
circuit
transformer
capacitive
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Withdrawn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
EP96107607A
Other languages
English (en)
French (fr)
Inventor
Franco Ciampolini
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.)
Marelli Europe SpA
Original Assignee
Magneti Marelli SpA
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 Magneti Marelli SpA filed Critical Magneti Marelli SpA
Publication of EP0742369A1 publication Critical patent/EP0742369A1/de
Withdrawn legal-status Critical Current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
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four

Definitions

  • the present invention relates to a triggering circuit, for example for spark plugs or ignitions of internal combustion engines.
  • the present triggering circuits of the type indicated comprise a transformer whose primary is connected in series to a capacitor and whose secondary is connected in parallel to a spark plug of an internal combustion engine or to an ignition of a turbine engine.
  • the circuit also comprises a switched-voltage generator which initially permits the charging of the capacitor at medium voltage and is then short-circuited to permit the discharge of the capacitor through the primary of the transformer. There is therefore a very fast voltage rise in the primary, which induces a corresponding voltage rise in the secondary capable of causing the discharge of the spark plug or ignition.
  • the object of the present invention is to improve a triggering circuit of the type indicated in such a way as to reduce its overall dimensions and to improve its efficiency.
  • a triggering circuit for ignition devices comprising at least a first and a second inductive element coupled magnetically together and to a magnetic core, and a capacitive element connected to the said first inductive element, the said second inductive element being connected to an ignition device, characterized in that it comprises a capacitive transformer including at least a first and a second sheet of conductive material wound around the said magnetic core and coupled magnetically to a secondary winding in such a way as to form the said first and second inductive elements and the said capacitive element.
  • the present triggering circuit comprises a capacitive transformer made from a single component 1 having capacitive and inductive characteristics (a capacitive transformer).
  • the capacitive transformer shown in Figures 1 and 2, comprises a core 13 of ferromagnetic material around which is wound a conducting wire 14 forming the secondary of the transformer.
  • the plates 15 and 16 have ends (corresponding to the ends of the two spirals visible in the view from above in Fig. 1) forming terminals A, C and D, B respectively, while the ends of the conducting wire 14 (secondary) are indicated by L and H.
  • the capacitive transformer 1 which forms a variant of a capacitive and inductive element which is the subject of an associated patent application filed on the same date and having the title "Capacitive and inductive element"
  • the equivalent circuit 20 comprises a theoretical transformer 2 formed by a primary 3 and a secondary 4, and a capacitor 5 arranged in series with the primary 3 and interposed between the primary and the terminal A.
  • the primary 3 also forms the terminal B, while the secondary forms the terminals L, H; the terminals A, B, H, L shown here correspond to those with the same letters in Fig. 1.
  • the node between the capacitor 5 and the primary 3 corresponds to the terminal D, illustrated here but not used.
  • the plates 15, 16 may be insulated from each other by any dielectric material suitable for the purpose. Additionally, instead of two single leaves, it is possible to provide for each plate a plurality of leaves or sheets connected in the form of a comb and interdigitated, in other words arranged in such a way that two adjacent leaves of one plate have one leaf of the other plate inserted between them, as described in greater detail in the previously cited associated patent application.
  • the capacitive transformer 1 according to Figs. 1 and 2 has a primary which also incorporates the capacitor 5, thus making it possible to obtain a very compact device, a reduction of manufacturing costs and a higher efficiency of the component.
  • the transformer 1 can be shown diagrammatically as represented in Fig. 4 by the circuit 22.
  • the circuit 22 in Fig. 4 has six terminals A-D, H, L, similar to the corresponding terminals in Fig. 1; an inductor 23 is arranged between the terminals A and C; a capacitor 24 is arranged between the terminals A and D; a capacitor 25 is arranged between the terminals C and B; an inductor 26, forming the primary of the transformer, is arranged between the terminals D and B and an inductor 27, coupled magnetically to the inductor 23 and to the inductor 26 and consequently forming the secondary of the transformer, is arranged between the terminals H and L.
  • the capacitive transformer 1 is used in a triggering circuit for ignition devices, one embodiment of which is shown by way of example in Fig. 5.
  • the triggering circuit 30 in Fig. 5 comprises a continuous voltage generator 8 connected to the terminals A and B of the capacitive transformer 1, in parallel with a switch 6.
  • the equivalent circuit 20 in Fig. 3 of the capacitive transformer 1, comprising the primary 3 and the secondary 4 and the capacitor 5, is shown here.
  • a spark plug 7 or other ignition device is connected in parallel with the secondary 4 of the capacitive transformer 1.
  • the operation of the circuit 30 is as follows. Initially, the switch 6 is open and the voltage generator 8 charges the capacitor 5 at a medium voltage (typically 100-600 V). When the switch 6 is closed, the capacitor 5 discharges through the primary 3 of the transformer 2, inducing a potential difference in the secondary 4 sufficient to cause the discharge in the spark plug (or ignition) 7.
  • a medium voltage typically 100-600 V.
  • Fig. 6 shows an application based on the principle of providing, by means of the discharge of a capacitor to the primary 26 of the transformer, the energy required to initiate the discharge in the spark plug and, through the overvoltage of opening of an inductive circuit coupled to the secondary, the energy for maintaining the discharge over a period of time.
  • the circuit 34 in Fig. 6 comprises the capacitive transformer 1 between whose terminals H and L the spark plug 7 is arranged.
  • a continuous voltage generator 35 is connected to the terminals A and B, in parallel with a switch 36; a branch 37, comprising a resistor 38, a switch 39 and a continuous voltage generator 40 connected in series, is arranged between the terminals D and B.
  • the circuit 34 in Fig. 6 operates as follows. Initially, the switch 36 is open and the switch 39 is closed. When the circuit is switched on, the capacitor 5 is charged by the voltage generator 35 at a predetermined voltage, and a current i is induced in the primary 3 of the transformer through the branch 37. When the switch 36 is closed, the capacitor 5 discharges into the primary 3. Consequently a high voltage, capable of triggering the spark plug 7, is induced in the secondary 4 of the transformer. At the end of the discharge of the capacitor 5, or slightly before, the switch 39 is opened. This opening makes available the magnetic energy induced in the core 13 of the transformer by the current i; this energy may then be used to maintain the discharge of the spark plug 7 for a certain period.
  • Figure 7 shows an embodiment using the equivalent circuit 22 shown in Fig. 4, in which a current is induced in the inductance 26 through the terminals B and D, and the capacitors 24 and 25 are charged through the terminals A and B.
  • the circuit 45 in Fig. 7 comprises the capacitive transformer 1, represented by its components 23-27; a generator 46 of a continuous voltage V 1 is connected to the terminal D of the capacitive transformer 1 through a resistor 47 and a diode 48. The cathode of the diode 48 is connected to the terminal D.
  • the circuit 45 also comprises a switch 49 arranged in a bypass line 51 which connects the terminals A and B; the terminal B is also connected to earth through a switch 50.
  • the terminal A forms a terminal for the application of a voltage V 2 obtained by means of a voltage generator which is not shown.
  • the terminal H of the secondary 27 is connected to the terminal D and the terminal L is connected to one terminal of the spark plug 7, whose other terminal is connected to earth.
  • the capacitive transformer 1 in the circuit 45 it is therefore possible to obtain an ignition circuit having lower costs than one made with discrete components, owing to the use of a single component for the formation of a plurality of elements.
  • the circuit described also has improved efficiency, owing to the reduction of the losses due, in the known circuit, to the wiring of the components.
  • the plates of the capacitor or capacitors may be made of any conductive material and may be insulated by any dielectric material.
  • the magnetic circuit may have any configuration and may be made of any material (including non-magnetic material), with the primary inside or outside the secondary.
  • the terminal L of the secondary in the circuits 30 and 34 may be connected directly or indirectly to the earth of the spark plug 7; alternatively, each of the terminals L, H of the said circuits 30 and 34 may be connected to a terminal of a corresponding spark plug whose other terminal is connected to earth (lost discharge).
  • the triggering circuit may be used for the ignition of internal combustion engines of various types, including four- and two-stroke and Diesel engines, for motor propulsion, in motor vehicles, for aircraft, etc. or as the ignition in turbine engines and similar. It may also be used as an ignition for fuel burners (furnaces, ovens, heating systems); as a starting system for discharge lighting devices; and as a control and monitoring circuit incorporated (possibly only partially) in the component. Finally, it is possible to combine one or more primary or secondary windings of the leaf type shown or of the conventional type in the same magnetic circuit to decouple the functions of generation of the first triggering discharge and generation of the energy for maintaining the discharge.
  • the circuit 34 in such a way that the capacitive transformer 1 has three leaf windings around the same core, of which the innermost winding forms the capacitive winding (first primary) connected to the continuous voltage generator 35 and to the switch 36, the intermediate winding forms the second primary, connected to the maintenance branch 37, and the outermost winding forms the secondary.

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)
EP96107607A 1995-05-12 1996-05-13 Auslöscheschaltung für Zündvorrichtung Withdrawn EP0742369A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT95TO000383A IT1279206B1 (it) 1995-05-12 1995-05-12 Circuito di innesco per dispositivi accenditori.
ITTO950383 1995-05-12

Publications (1)

Publication Number Publication Date
EP0742369A1 true EP0742369A1 (de) 1996-11-13

Family

ID=11413554

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96107607A Withdrawn EP0742369A1 (de) 1995-05-12 1996-05-13 Auslöscheschaltung für Zündvorrichtung

Country Status (2)

Country Link
EP (1) EP0742369A1 (de)
IT (1) IT1279206B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0902442A1 (de) * 1997-09-15 1999-03-17 Cooper Industries Italia S.p.A. Spule mit induktivem und kapazitivem Verhalten
WO1999017016A3 (en) * 1997-09-18 1999-06-24 Allied Signal Inc High pulse rate ignition source
US6457464B1 (en) 1996-04-29 2002-10-01 Honeywell International Inc. High pulse rate spark ignition system
WO2007087818A1 (de) 2006-01-20 2007-08-09 Vogt Electronic Components Gmbh Zündtransformator und zündmodul für eine entladungsleuchte

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3704390A (en) * 1972-01-26 1972-11-28 Frederick W Grahame Combined capacitor-inductor reactor device having transformer characteristics
GB2137427A (en) * 1983-03-28 1984-10-03 Mcculloch Corp Electrical energy storage and transfer devices
WO1990007056A1 (en) * 1988-12-16 1990-06-28 Ducati Energia S.P.A. Ignition electronic device for endothermic motors of small size
FR2642892A1 (fr) * 1989-02-06 1990-08-10 Siemens Bendix Automotive Elec Transformateur electrique a haute tension de sortie et circuit d'allumage de moteur a combustion interne equipe d'un tel transformateur
EP0495434A1 (de) * 1991-01-15 1992-07-22 WEBER S.r.l. Elektronische Vorrichtung zur Zündungssteuerung eines Fahrzeugverbrennungsmotors

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3704390A (en) * 1972-01-26 1972-11-28 Frederick W Grahame Combined capacitor-inductor reactor device having transformer characteristics
GB2137427A (en) * 1983-03-28 1984-10-03 Mcculloch Corp Electrical energy storage and transfer devices
WO1990007056A1 (en) * 1988-12-16 1990-06-28 Ducati Energia S.P.A. Ignition electronic device for endothermic motors of small size
FR2642892A1 (fr) * 1989-02-06 1990-08-10 Siemens Bendix Automotive Elec Transformateur electrique a haute tension de sortie et circuit d'allumage de moteur a combustion interne equipe d'un tel transformateur
EP0495434A1 (de) * 1991-01-15 1992-07-22 WEBER S.r.l. Elektronische Vorrichtung zur Zündungssteuerung eines Fahrzeugverbrennungsmotors

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6457464B1 (en) 1996-04-29 2002-10-01 Honeywell International Inc. High pulse rate spark ignition system
EP0902442A1 (de) * 1997-09-15 1999-03-17 Cooper Industries Italia S.p.A. Spule mit induktivem und kapazitivem Verhalten
WO1999017016A3 (en) * 1997-09-18 1999-06-24 Allied Signal Inc High pulse rate ignition source
US6535096B1 (en) 1997-09-18 2003-03-18 Honeywell International Inc. High pulse rate ignition system
WO2007087818A1 (de) 2006-01-20 2007-08-09 Vogt Electronic Components Gmbh Zündtransformator und zündmodul für eine entladungsleuchte

Also Published As

Publication number Publication date
ITTO950383A1 (it) 1996-11-12
IT1279206B1 (it) 1997-12-04
ITTO950383A0 (it) 1995-05-12

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