EP0342319A2 - Installation d'allumage par décharge capacitive - Google Patents

Installation d'allumage par décharge capacitive Download PDF

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Publication number
EP0342319A2
EP0342319A2 EP89103617A EP89103617A EP0342319A2 EP 0342319 A2 EP0342319 A2 EP 0342319A2 EP 89103617 A EP89103617 A EP 89103617A EP 89103617 A EP89103617 A EP 89103617A EP 0342319 A2 EP0342319 A2 EP 0342319A2
Authority
EP
European Patent Office
Prior art keywords
coil
charging
capacitor
ignition system
electronic switch
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Withdrawn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
EP89103617A
Other languages
German (de)
English (en)
Other versions
EP0342319A3 (fr
Inventor
Michael Mueller
Werner Dipl.-Ing. Erhard
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.)
Pruefrex Elektro Apparatebau GmbH
Original Assignee
Pruefrex Elektro Apparatebau 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 Pruefrex Elektro Apparatebau GmbH filed Critical Pruefrex Elektro Apparatebau GmbH
Publication of EP0342319A2 publication Critical patent/EP0342319A2/fr
Publication of EP0342319A3 publication Critical patent/EP0342319A3/fr
Withdrawn legal-status Critical Current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
    • F02P1/00—Installations having electric ignition energy generated by magneto- or dynamo- electric generators without subsequent storage
    • F02P1/08—Layout of circuits
    • F02P1/086—Layout of circuits for generating sparks by discharging a capacitor into a coil circuit

Definitions

  • the invention relates to a capacitor ignition system for internal combustion engines with a charging capacitor to be charged by a magnetic generator with a common iron core during each of the one induced (positive) half-wave via a charging diode, which is discharged by an electronic switch via the primary winding of the ignition coil, one of which is from the magnetic generator Voltage half-waves induced in the primary winding controlled the electronic switch.
  • This arrangement initially has the disadvantage that a separate third coil is required in addition to the two coils of the ignition coil, which in particular increases the size of the ignition system.
  • this known ignition system according to the US patent has the disadvantage that the due to the common arrangement of all Spu voltages induced on an iron core can destroy the charging diode.
  • the invention is therefore based on the object of designing and improving a capacitor ignition system of the type mentioned at the outset in such a way that - based on a predetermined desired charging voltage of the charging capacitor, less effort is required and that the ignition system is also more reliable.
  • the invention provides that the charging coil is part of the ignition coil.
  • the charging coil is provided with an intermediate tap, the electronic switch being in series with the charging diode parallel to the first coil section, while the second coil section forming the primary winding of the ignition coil in the control path of the electronic switch lies.
  • the two coil sections connected in series contribute to the charging of the capacitor, that is also the section which forms the primary winding of the ignition coil, while in the US patent mentioned the coils are arranged in separate parallel branches to the charging capacitor and thus the voltage also induced in the primary winding with the same polarity cannot contribute at all to the charging of the capacitor during the charging phase.
  • the section of the coil that forms the primary winding is only a coil section with, for example, about 50 turns and a wire cross section of about 0.5 mm, while the other section can preferably comprise about 2000 turns with a wire cross section of only 0.08 mm.
  • the coil section connected in parallel with the charging diode to the electronic switch is blocked by a reverse diode which short-circuits negative voltage peaks induced in the ignition in this coil section.
  • the electronic switch when designed as a thyristor, the gate of which lies at the center tap of a voltage divider connected in parallel with the second coil section (primary winding), with the aid of which the negative voltage is divided down in accordance with the chosen resistance ratio.
  • the branch of the voltage divider located in the gate-cathode section contains a short-circuiting diode that has a negative voltage that is greater than 1 volt.
  • the charging coil was part of the ignition coil in that the primary winding of the ignition coil was formed by a section of the charging coil, according to a second Embodiment of the present invention, a section (charging coil section), which is provided with an intermediate tap secondary coil of the ignition coil, the charging coil, wherein preferably the charging coil section is connected in parallel with a varistor for protecting the charging diode, so that the voltage at the charging diode is limited to a value that Diode can still lock. This voltage is usually between 1000 volts and 2000 volts.
  • this section of the secondary coil does not contribute with its full theoretical possibility to the ignition spark. It is of crucial importance that, in addition to a conventional ignition coil, an additional charging coil is not required at all, the total number of coil windings required, ie the overall size of the coils of the capacitor ignition system, being reduced much more than in the first embodiment of the present invention.
  • the electronic switch which is preferably in the form of a thyristor, is connected in parallel with a diode which is permeable in its blocking direction, as a result of which an uninterrupted, damped oscillation and thus a correspondingly long spark-burning duration is achieved.
  • the spark burning time is achieved up to about five times the value that results when this diode is not present.
  • the longest possible spark burning time is extremely desirable in practice.
  • the capacitor ignition systems described above are triggered by the primary coil, namely from a certain voltage of the half-wave not serving to charge the charging capacitor, this switches it through via the control electrode of the electronic switch.
  • the ignition takes place from about 5000 revolutions per minute with increasing speed, because there are voltage jumps on the primary voltage due to the breakdown of the charging current for the charging capacitor when triggered by the primary coil. This affects the ignition timing.
  • a separate trigger coil can be provided in an embodiment of the invention on a staggered leg of the iron core, which is only influenced by the passing magnet relative to the coil sections of the ignition coil with a time delay becomes. In this way, the difficulties with the voltage jumps mentioned can be very easily eliminated.
  • a capacitor ignition system in relation to the circuit of the US patent font Re. 31 837 the coil sections L1 and L2 are connected in series so that they together contribute to the charging of the charging capacitor C.
  • the two sections L1 and L2 thus form (or can at least form) a charging coil, one section L2 of which forms the primary winding of the ignition coil Z, in the secondary winding L3 of which the high voltage is induced when the capacitor is discharged via the electronic switch S designed as a thyristor.
  • D1 designates the usual charging diode provided in such capacitor ignition systems, while D2 shows a reversing diode which is connected with its anode to ground via the first coil section L1 of the charging coil.
  • the ignition circuit consists of the second coil section L2 of the charging coil forming the primary winding, the resistor R1 and the gate-cathode path of the thyristor forming the switch S.
  • FIG. 2 instead of the resistor R1, a voltage divider circuit comprising the resistors R1, R2 is provided, by means of which such negative voltages are divided down in accordance with the chosen resistance ratio.
  • a redrawing is shown in FIG. 2 only compared to FIG. 1 without any further change, which clearly shows that the coil sections L1 and L2 of the charging coil actually represent a common charging coil (which of course does not exclude that the individual sections may have different wire thicknesses).
  • FIG. 3 A further advantageous modification is shown in FIG. 3, in which a diode D3 is provided instead of the resistor R2 of the voltage divider circuit according to FIG. 2, which short-circuits negative voltages which are greater than 1 volt.
  • FIG. 4 shows an exemplary embodiment of the second embodiment of the present invention, in which the section L21, the secondary coil L20 of the ignition coil Z provided with a center tap, is used as the charging coil.
  • the lower coil part L21 up to the tap is thus used twice, firstly for charging the capacitor and secondly with the remaining winding parts of L20 as a secondary coil. This is possible because the two processes “capacitor charging” and “step-up voltage from primary winding L10 to secondary winding L20" take place in succession.
  • the varistor Var1 serves to protect the charging diode D1.
  • the varistor limits the voltage at the charging diode D1 to a value that the diode can still block. This voltage is usually between 1000 volts and 2000 volts.
  • a voltage is induced in the coils L10 and L20 of the ignition coil.
  • the coils L10 and L20 are distinguished by the corresponding winding direction, which is indicated by dots in the circuit diagram Lich poled (Fig. 5).
  • a partial voltage of the coil L20, namely the part in the coil section L21, is used during the time t1 (FIG. 5) to charge the capacitor C via the charging diode D1 and the primary winding L10.
  • the voltage in the primary coil L10 reaches the trigger threshold and the thyristor forming the switch S is ignited via the primary winding L 10, the branch R1 of the voltage divider section R1, R2, the gate cathode of the thyristor and the way back to the primary coil L10.
  • the capacitor C is discharged via the thyristor forming the electronic switch on the primary coil L10.
  • the transmission ratio of approximately 1 to 1000 between L10 and L20 creates the high voltage in the secondary coil for generating an ignition spark.
  • the charging capacitor and the primary coil L10 form an oscillating circuit.
  • the diode D4 which is switched against the forward direction of the electronic switch S, derives the voltage half-waves that are not passed. It is only through this diode D4 that an uninterrupted damped oscillation is created, and thus a correspondingly long spark burning time. Without this diode D4, the spark burning time would only be approx. 20% of the value achieved in this way.
  • an additional trigger coil L30 is provided in the embodiment according to FIGS. 7 and 8 modified from FIG. 4, which is arranged on the second iron leg of the U-shaped iron core K and is thus offset in time from the rotating one Magnet compared to the coils L10 and L20 of the ignition coil is affected.
  • the trigger pulse is no longer taken from the primary coil L10, but from the trigger coil L30 men.

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)
EP89103617A 1988-05-20 1989-03-02 Installation d'allumage par décharge capacitive Withdrawn EP0342319A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3817187 1988-05-20
DE3817187A DE3817187A1 (de) 1988-05-20 1988-05-20 Kondensatorzuendanlage

Publications (2)

Publication Number Publication Date
EP0342319A2 true EP0342319A2 (fr) 1989-11-23
EP0342319A3 EP0342319A3 (fr) 1990-05-23

Family

ID=6354759

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89103617A Withdrawn EP0342319A3 (fr) 1988-05-20 1989-03-02 Installation d'allumage par décharge capacitive

Country Status (3)

Country Link
US (1) US4949696A (fr)
EP (1) EP0342319A3 (fr)
DE (1) DE3817187A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5295465A (en) * 1992-10-01 1994-03-22 Kohler Company Apparatus and method for controlling ignition of an internal combustion engine
JPH10103204A (ja) * 1996-09-30 1998-04-21 Sanshin Ind Co Ltd 内燃機関の点火装置
DE10302119A1 (de) * 2003-01-21 2004-07-29 Epcos Ag Elektrode für eine elektrochemische Zelle, Elektrodenwickel und elektrochemische Zelle
US7546836B2 (en) * 2007-01-26 2009-06-16 Walbro Engine Management, L.L.C. Ignition module for use with a light-duty internal combustion engine
DE102012112480B4 (de) * 2012-07-04 2018-10-04 Dehn + Söhne Gmbh + Co. Kg Gekapselte, blitzstromtragfähige und folgestrombegrenzende Überspannungsschutzeinrichtung mit mindestens einer Funkenstrecke
JP2018178997A (ja) * 2017-04-20 2018-11-15 株式会社デンソー 内燃機関用点火システム

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US31837A (en) * 1861-03-26 Machine for turning oval frames
AT283822B (de) * 1967-05-09 1970-08-25 Bosch Gmbh Robert Zündeinrichtung für Brennkraftmaschinen
AT290218B (de) * 1967-10-24 1971-05-25 Povazske Strojarne Np Kontaktlose Zündvorrichtung für Brennkraftmotoren
US3545420A (en) * 1968-11-27 1970-12-08 Motorola Inc Capacitor discharge ignition system
DE1954874C3 (de) * 1969-10-31 1978-07-20 Robert Bosch Gmbh, 7000 Stuttgart Zündeinrichtung fur eine Brennkraftmaschine
DE2139699A1 (de) * 1971-08-07 1973-02-15 Bosch Gmbh Robert Zuendeinrichtung fuer brennkraftmaschinen
DE2263244A1 (de) * 1971-12-28 1973-07-12 Yamaha Motor Co Ltd Zuendanlage fuer brennkraftmaschinen
US3941111A (en) * 1973-09-10 1976-03-02 Syncro Corporation Ignition system
US4056088A (en) * 1974-04-12 1977-11-01 Syncro Corporation Ignition system
US3960128A (en) * 1974-10-15 1976-06-01 Mcculloch Corporation Capacitor discharge ignition system
US3955549A (en) * 1974-10-29 1976-05-11 R. E. Phelon Company, Inc. CD ignition system with anti-reverse feature
US4033311A (en) * 1974-12-26 1977-07-05 R. E. Phelon Company, Inc. Ignition system with hazardous-start inhibiting interlock
US4181114A (en) * 1975-04-25 1980-01-01 Aktiebolaget Svenska Elektromagneter Circuit arrangement for electronic ignition apparatus
SE389894B (sv) * 1975-04-25 1976-11-22 Svenska Electromagneter Kopplingssystem vid elektroniska tendapparater
US4036201A (en) * 1975-04-29 1977-07-19 R. E. Phelon Company, Inc. Single core condenser discharge ignition system
USRE31837E (en) 1975-04-29 1985-02-26 R. E. Phelon Company, Inc. Single core condenser discharge ignition system
US4170977A (en) * 1976-12-20 1979-10-16 Syncro Corporation Ignition system
JPS6053797B2 (ja) * 1978-05-24 1985-11-27 株式会社デンソー 内燃機関用点火装置
US4202305A (en) * 1978-07-25 1980-05-13 Wabash, Inc. Capacitor discharge ignition system with timing stabilization arrangement
AU528040B2 (en) * 1979-04-13 1983-04-14 R.E. Phelon Company, Inc. Capacitor discharge breakerless ignition system
US4285321A (en) * 1979-10-19 1981-08-25 R. E. Phelon Company, Inc. Capacitor discharge ignition system
US4538586A (en) * 1983-12-21 1985-09-03 Textron, Inc. Capacitive discharge ignition with long spark duration
JPS611663U (ja) * 1984-06-11 1986-01-08 株式会社共立 点火装置
DE3630723A1 (de) * 1986-09-10 1988-03-24 Stihl Maschf Andreas Magnetzuendanlage fuer motorkettensaegen

Also Published As

Publication number Publication date
DE3817187A1 (de) 1989-11-23
DE3817187C2 (fr) 1991-01-24
EP0342319A3 (fr) 1990-05-23
US4949696A (en) 1990-08-21

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