EP0811763B1 - Dispositif d'allumage avec commande de distribution de tension de générateur - Google Patents

Dispositif d'allumage avec commande de distribution de tension de générateur Download PDF

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Publication number
EP0811763B1
EP0811763B1 EP97630031A EP97630031A EP0811763B1 EP 0811763 B1 EP0811763 B1 EP 0811763B1 EP 97630031 A EP97630031 A EP 97630031A EP 97630031 A EP97630031 A EP 97630031A EP 0811763 B1 EP0811763 B1 EP 0811763B1
Authority
EP
European Patent Office
Prior art keywords
electric generator
circuit
ignition
battery
thyristor
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
EP97630031A
Other languages
German (de)
English (en)
Other versions
EP0811763A3 (fr
EP0811763A2 (fr
Inventor
Yutaka Nozue
Atsushi Yanase
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.)
Mitsuba Corp
Original Assignee
Mitsuba Corp
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 Mitsuba Corp filed Critical Mitsuba Corp
Publication of EP0811763A2 publication Critical patent/EP0811763A2/fr
Publication of EP0811763A3 publication Critical patent/EP0811763A3/fr
Application granted granted Critical
Publication of EP0811763B1 publication Critical patent/EP0811763B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
    • F02P15/12—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits having means for strengthening spark during starting
    • 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
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/02—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving cycles
    • 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

Definitions

  • the present invention relates to an ignition system, in particular to an ignition system comprising a CDI circuit in which a capacitor charged by a supply voltage from an electric generator is selectively discharged at an appropriate ignition timing so that ignition current is supplied to an ignition unit of an internal combustion engine.
  • Various types of ignition systems are used for internal combustion engines for automobiles.
  • DCCDI DC-DC converter
  • a DC-DC converter is used to raise the supply voltage so as to obtain a voltage required for a CDI-type ignition unit.
  • FIG. 4 schematically shows a circuit configuration of a conventional DCCDI-type ignition system.
  • An AC generator 1 is connected via a regulator circuit 12 to a battery 3, a stop lamp 4 and a lamp 5 for a meter such as a speedometer or the like, as well as to one end of a primary winding 7a of a transformer 7 in a DC-DC converter 6.
  • the other end of the primary winding 7a is selectively connected to the ground via a switching transistor T which is controlled by a DC-DC converter control circuit 8.
  • the secondary winding 7b of the transformer 7 in the DC-DC converter 6 is connected to an ignition unit 9.
  • the battery 3 when the battery 3 is disconnected or is not charged sufficiently, it may be even more difficult or sometimes impossible to start the engine by operating a kickstarter of the motorcycle.
  • the AC generator 1 When the AC generator 1 is rotated by operating the kickstarter, the electric power generated by the AC generator 1 is consumed by the electrical loads. Further, the battery 3 may also absorb electrical current when it is undercharged. In such a case, the AC generator 1 may be unable to generate a sufficiently high voltage required for the DC-DC converter 6 to operate properly. As a result, the output voltage of the DC-DC converter 6 may be insufficiently low or sometimes the DC-DC converter 6 cannot operate at all, failing to charge the capacitor Cc in the ignition unit 9 to a sufficiently high voltage level to produce an ignition spark.
  • a primary object of the present invention is to provide an ignition system which, in case the battery is not properly functioning, can distribute the power from the electric generator preferentially to the CDI circuit so that the power is prevented from being consumed by the electrical loads other than the ignition unit, to thereby ensure proper starting of the engine.
  • a second object of the present invention is to provide such an ignition system as a simple circuit with minimum additional cost.
  • the present invention provides an ignition system for an internal combustion engine of a vehicle comprising: an electric generator; an ignition circuit connected to the electric generator for producing a spark voltage for a spark plug; a battery having an end connected to the electric generator via switching means, and another end connected to the ground; and an electrical load connected in parallel with the battery, wherein the switching means includes a voltage detector for detecting an output voltage of the electric generator, and a switching element in use disconnecting the battery and the electrical load from the electric generator when the output voltage detected by the voltage detector is below a prescribed value.
  • the present invention is suitable for an ignition system for an internal combustion engine of a motorcycle in which a kickstarter is used to start the engine. More specifically, the present invention is particularly beneficial when the ignition circuit comprises a CDI circuit, especially when the ignition circuit comprises a DCCDI circuit in which a DC-DC converter is used to raise the output voltage from the generator so as to obtain a voltage required for a CDI-type ignition unit.
  • the switching means comprises: a thyristor connected between the electric generator and the battery; a thyristor control circuit having an output terminal connected to a gate of the thyristor; a zener diode having a cathode connected to the anode of the thyristor; and a transistor having a base connected to an anode of the zener diode, a collector connected to the anode of the thyristor via a resistor, and an emitter connected to the thyristor control circuit.
  • the zener diode does not conduct electrical current, and the transistor is kept in the off state. This prevents the output voltage of the electric generator from being applied to the thyristor control circuit, and hence the thyristor is kept in the off state, electrically disconnecting the battery and the electrical load from the generator. Because the electric power generated by the electric generator is not consumed by the battery or the electric load, the output voltage of the electric generator can go up to a sufficiently high voltage level to produce a spark from the spark plug, to thereby ensure proper starting of the engine.
  • FIG. 1 is a schematic circuit diagram of an embodiment of an ignition system for an internal combustion engine of a motorcycle to which the present invention is applied.
  • an AC generator 1 is connected via a regulator circuit 2 to one end of a battery 3, the other end of which being connected to the ground.
  • electrical loads including a stop lamp 4 and a meter lamp 5 in this embodiment.
  • the generator 1 is also connected to one end of a primary winding 7a of a transformer 7 in a DC-DC converter 6 via a well known rectification/overvoltage protection circuit.
  • the secondary winding 7b of the transformer 7 is connected to a CDI-type ignition unit 9.
  • the other end of the primary winding 7a is selectively connected to the ground through a switching transistor T which is controlled by a DC-DC converter control circuit 8.
  • the regulator circuit 2 comprises (i) a thyristor SCR connected between the AC generator 1 and the battery 3, (ii) a thyristor control circuit 2a connected to a gate terminal of the thyristor SCR to provide a trigger signal to the gate terminal so as to turn on the thyristor SCR, and (iii) a disconnecting circuit 2b consisting of a zener diode ZR, a transistor TR and a resistor for, according to the output voltage from the AC generator 1, stopping power feed to the thyristor control circuit 2a selectively so as to electrically disconnect the battery 3 and the electrical loads including the stop lamp 4 and meter lamp 5 in the downstream of the thyristor SCR.
  • the AC generator 1 can generate a sufficient voltage to power the DC-DC converter. After the battery 3 has been sufficiently charged, the stop lamp 4 and meter lamp 5 can also function properly.
  • the output voltage (at terminal CH) of the AC generator 1 fluctuates when the electric generator 1 is rotated by operating a kickstarter in order to start the engine.
  • the output voltage of the generator 1 cannot go up to a sufficient level due to the electrical current which flows through the various electrical loads (i.e., the stop lamp 4, meter lamp 5, and the like) other than the ignition unit.
  • the voltage applied to the DC-DC converter 6 may be about 3V due to a regulator circuit between the DC-DC converter 6 and the AC generator 1. At such a voltage, the DC-DC converter 6 is virtually unable to operate and cannot generate a sufficient voltage.
  • the zener diode ZR does not conduct electrical current, and the transistor TR is kept in the off state.
  • a prescribed value e.g. 7V
  • the zener diode ZR does not conduct electrical current, and the transistor TR is kept in the off state.
  • the output voltage from the AC generator 1 is applied to the input of the DC-DC converter 6 substantially without any loss.
  • Such a voltage is enough to power the DC-DC converter 6 so that the capacitor Cc is charged to an adequately high voltage above a threshold level to produce a spark from the spark plug.
  • FIG 3 shows another embodiment of the ignition system according to the present invention. This embodiment is similar to that shown in Figure 1 except that the battery 3 is also connected to the rectification/overvoltage protection circuit via a diode A having an anode connected to the battery 3 and a cathode connected to the rectification/overvoltage protection circuit, and the electric generator 1 is connected to the rectification/overvoltage protection circuit via another diode B having an anode connected to the generator 1 and a cathode connected to the rectification/overvoltage protection circuit.
  • a diode A having an anode connected to the battery 3 and a cathode connected to the rectification/overvoltage protection circuit
  • the electric generator 1 is connected to the rectification/overvoltage protection circuit via another diode B having an anode connected to the generator 1 and a cathode connected to the rectification/overvoltage protection circuit.
  • the DC-DC converter 6 can be supplied with power from the battery 3 via the rectification/overvoltage protection circuit when the battery 3 is properly functioning, with the result that a more stable voltage can be applied to the DC-DC converter 6 compared with when the power is supplied from the electric generator 1 alone.
  • the power is supplied from the generator 1 in a similar way to that described in the first embodiment, except that the output voltage of the electric generator 1 is decreased by a voltage drop across the diode B.
  • the present invention has been described in terms of specific embodiments thereof, it is possible to modify and alter details thereof without departing from the spirit of the present invention.
  • a single-phase AC generator was used in the above embodiments, but the present invention is also applicable to ignition systems which comprise an AC generator of a three-phase type. In such a case, a similar effect can be obtained by changing at least one diode in the regulator circuit to a thyristor and applying the present invention in a similar manner to that described above.
  • a DCCDI system was used as an ignition system of an engine in the above embodiment, the present invention is also applicable to a CDI system which does not use a DC-DC converter.
  • the electrical loads can include, besides those mentioned above, a fuel meter, a starter motor or, in some circuit configurations, a tale lamp, a head lamp or the like.
  • the ignition unit even when the battery is not properly functioning, it is possible to provide the ignition unit with a sufficient voltage from the electric generator by operating the kickstarter of the motorcycle, to thereby ensure proper starting of the engine.

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)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Claims (7)

  1. Système d'allumage pour moteur automobile à combustion interne comprenant :
    un générateur électrique ;
    un circuit d'allumage connecté au générateur électrique pour produire une tension d'étincelage pour une bougie d'allumage ;
    une batterie dont une extrémité est connectée au générateur électrique par le biais d'un moyen de commutation, et une autre connectée à la masse ; et
    une charge électrique connectée en parallèle à la batterie,
       dans lequel le moyen de commutation comprend un détecteur de tension pour détecter une tension de sortie du générateur électrique, et un élément de commutation débranchant la batterie et la charge électrique du générateur électrique lorsque la tension de sortie détectée par le détecteur de tension est inférieure à une valeur prescrite
  2. Système d'allumage selon la revendication 1, dans lequel le véhicule est une motocyclette.
  3. Système d'allumage selon la revendication 2, dans lequel le circuit d'allumage comprend un circuit CDI.
  4. Système d'allumage selon la revendication 3, dans lequel le circuit d'allumage comprend en outre un convertisseur CC-CC connecté entre le générateur électrique et le circuit CDI pour relever la tension de sortie du générateur électrique afin d'obtenir une tension nécessaire au fonctionnement du circuit CDI.
  5. Système d'allumage selon la revendication 1, dans lequel l'élément de commutation se compose d'un thyristor.
  6. Système d'allumage selon la revendication 1, dans lequel le moyen de commutation comprend :
    un thyristor connecté entre le générateur électrique et la batterie ;
    un circuit de commande à thyristor ayant une borne de sortie connectée à une gâchette du thyristor ;
    une diode Zener ayant une cathode connectée à l'anode du thyristor ; et
    un transistor ayant une base connectée à une anode de la diode Zener, un collecteur connecté à l'anode du thyristor par l'intermédiaire d'une résistance, et un émetteur connecté au circuit de commande à thyristor.
  7. Système d'allumage selon la revendication 1, dans lequel la batterie est également connectée au circuit d'allumage par l'intermédiaire d'une première diode ayant une anode connectée à la batterie et une cathode connectée au circuit d'allumage, et une seconde cathode est connectée entre le générateur électrique et le circuit d'allumage, la seconde diode ayant une anode connectée au générateur électrique et une cathode connectée au circuit d'allumage.
EP97630031A 1996-06-05 1997-06-03 Dispositif d'allumage avec commande de distribution de tension de générateur Expired - Lifetime EP0811763B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP165303/96 1996-06-05
JP16530396A JP3525010B2 (ja) 1996-06-05 1996-06-05 点火制御装置
JP16530396 1996-06-05

Publications (3)

Publication Number Publication Date
EP0811763A2 EP0811763A2 (fr) 1997-12-10
EP0811763A3 EP0811763A3 (fr) 1999-12-15
EP0811763B1 true EP0811763B1 (fr) 2002-10-30

Family

ID=15809776

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97630031A Expired - Lifetime EP0811763B1 (fr) 1996-06-05 1997-06-03 Dispositif d'allumage avec commande de distribution de tension de générateur

Country Status (9)

Country Link
EP (1) EP0811763B1 (fr)
JP (1) JP3525010B2 (fr)
KR (1) KR100268957B1 (fr)
CN (1) CN1071843C (fr)
ES (1) ES2184051T3 (fr)
ID (1) ID17443A (fr)
IN (1) IN192325B (fr)
MY (1) MY119183A (fr)
TW (1) TW328556B (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1080379C (zh) * 1999-02-05 2002-03-06 财团法人工业技术研究院 电子喷油摩托车的电力系统
JP3949854B2 (ja) * 1999-10-01 2007-07-25 キッコーマン株式会社 糖化蛋白質の測定方法
JP4378224B2 (ja) * 2004-06-04 2009-12-02 株式会社ミクニ 電源装置
JP2007288916A (ja) 2006-04-17 2007-11-01 Yamaha Motor Co Ltd 電圧調整回路、および電圧調整回路を備えた自動二輪車
CN103765106B (zh) * 2011-05-20 2015-09-09 博世株式会社 火花塞、火花塞的单体实验方法、火花塞新旧判断方法及火花塞的驱动控制装置
JP6069337B2 (ja) * 2012-09-26 2017-02-01 本田技研工業株式会社 エンジン始動装置
CN108278173B (zh) * 2018-02-12 2024-01-05 芜湖长捷航空动力科技有限责任公司 一种发动机电路控制系统

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59183078A (ja) * 1983-04-04 1984-10-18 Nissan Motor Co Ltd 内燃機関用点火装置
US4687991A (en) * 1985-08-30 1987-08-18 Brunswick Corporation Two and four cycle digital tachometer
JP2653240B2 (ja) * 1990-11-06 1997-09-17 国産電機株式会社 コンデンサ放電式内燃機関用点火装置
US5415136A (en) * 1993-08-30 1995-05-16 Illinois Tool Works Inc. Combined ignition and fuel system for combustion-powered tool
IT1270142B (it) * 1994-05-26 1997-04-29 Ducati Energia Spa Dispositivo per l'alimentazione di carichi elettrici e del circuito di accensione di motori a scoppio di veicoli a motore

Also Published As

Publication number Publication date
EP0811763A3 (fr) 1999-12-15
IN192325B (fr) 2004-04-10
KR980006676A (ko) 1998-03-30
JPH09324732A (ja) 1997-12-16
KR100268957B1 (ko) 2000-10-16
JP3525010B2 (ja) 2004-05-10
CN1071843C (zh) 2001-09-26
ES2184051T3 (es) 2003-04-01
EP0811763A2 (fr) 1997-12-10
CN1176344A (zh) 1998-03-18
TW328556B (en) 1998-03-21
ID17443A (id) 1997-12-24
MY119183A (en) 2005-04-30

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