JP2515397Y2 - Capacitor charge / discharge type ignition device - Google Patents

Capacitor charge / discharge type ignition device

Info

Publication number
JP2515397Y2
JP2515397Y2 JP2546590U JP2546590U JP2515397Y2 JP 2515397 Y2 JP2515397 Y2 JP 2515397Y2 JP 2546590 U JP2546590 U JP 2546590U JP 2546590 U JP2546590 U JP 2546590U JP 2515397 Y2 JP2515397 Y2 JP 2515397Y2
Authority
JP
Japan
Prior art keywords
capacitor
voltage
exciter
ignition
control circuit
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
JP2546590U
Other languages
Japanese (ja)
Other versions
JPH03116417U (en
Inventor
正美 河辺
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.)
Shindengen Electric Manufacturing Co Ltd
Original Assignee
Shindengen Electric Manufacturing Co Ltd
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 Shindengen Electric Manufacturing Co Ltd filed Critical Shindengen Electric Manufacturing Co Ltd
Priority to JP2546590U priority Critical patent/JP2515397Y2/en
Publication of JPH03116417U publication Critical patent/JPH03116417U/ja
Application granted granted Critical
Publication of JP2515397Y2 publication Critical patent/JP2515397Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【考案の詳細な説明】 本考案は、エキサイタを電源とし、点火用コンデンサ
ーの過電圧保護回路を有するコンデンサー充放電式点火
装置の制御回路の電源供給方式に関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power supply system for a control circuit of a capacitor charging / discharging ignition device that uses an exciter as a power source and has an overvoltage protection circuit for an ignition capacitor.

第1図は従来のコンデンサー充放電式点火装置の回路
図である。エキサイタEXTの出力正側半波電圧で整流用
ダイオードD1を通して点火用コンデンサC1を充電する次
にエキサイタEXT出力の負側半波電圧でサイリスタS1
点弧させ、前記コンデンサC1の電荷を放電させて、イグ
ニシヨンコイルINGに点火パルスを発生させプラグに火
花を発生させていた。
FIG. 1 is a circuit diagram of a conventional capacitor charging / discharging ignition device. Exciter EXT is ignited output positive side next to the exciter EXT thyristors S 1 on the negative side half-wave voltage output to charge the ignition capacitor C 1 in half-wave voltage through the rectifier diode D 1 of the charge of the capacitor C 1 Was discharged and an ignition pulse was generated in the ignition coil ING and a spark was generated in the plug.

この時、エキサイタEXTの出力電圧が過電圧になり、
点火用コンデンサC1が過電圧になるのを防ぐ為に過電圧
保護回路が構成されていた。すなわちエキサイタEXTの
出力電圧が過電圧になると抵抗R2とR3の分圧電圧によっ
てサイリスタS2が点弧しエキサイタコイルを短絡してい
た。
At this time, the output voltage of the exciter EXT becomes overvoltage,
An overvoltage protection circuit was configured to prevent the ignition capacitor C 1 from becoming overvoltage. That is, when the output voltage of the exciter EXT becomes an overvoltage, the divided voltage of the resistors R 2 and R 3 fires the thyristor S 2 to short-circuit the exciter coil.

過電圧になりエキサイタEXTが短絡されると、制御回
路CONTの入力電圧も大きく変動し、該制御回路が正常動
作する事が出来なくなってしまう等の不具合があった。
When the exciter EXT is short-circuited due to overvoltage, the input voltage of the control circuit CONT also fluctuates significantly, and the control circuit cannot operate normally.

本考案は、エキサイタより制御回路に電源を供給して
いるコンデンサー充放電式点火装置に於いて、点火用コ
ンデンサーの過電圧保護回路が動作した時に生じる制御
回路電源不足、又は変動を解決するものであり、コンデ
ンサー充放電式点火装置に有効である。
The present invention is to solve the shortage or fluctuation of the control circuit power supply that occurs when the overvoltage protection circuit of the ignition capacitor operates in the capacitor charging / discharging ignition device that supplies power to the control circuit from the exciter. It is effective for a condenser charging / discharging type ignition device.

第2図は、本考案の実施例であって、Iはコンデンサ
ー充放電式点火装置の基本回路であり、エキサイタEXT
の正側の半波のみをダイオードD1を通し点火用コンデン
サーC1に充電し、制御回路CONTの出力端子Gよりの点火
タイミング信号により、サイリスタS1を点弧し点火用コ
ンデンサーC1の電荷をイグニッションコイルINGに放電
する。IIは制御回路の電源回路であり、エキサイタEXT
の正側の半波ををダイオードD3、抵抗R4を通してツェナ
ーダイオードZ1の電圧値までコンデンサーC2に充電す
る。又、中高速時にエキサイタEXTが過電圧となり、サ
イリスタS2が点弧すると、抵抗R6に発生した電圧をダイ
オードD4、抵抗R7を通して同様にコンデンサーC2に充電
する。IIIは点火時期を決める制御回路であり、点火タ
イミング信号をパルサーコイルPCより制御回路CONTの入
力端子INに入力する。制御回路電源は端子VDに入力し、
点弧信号は制御回路CONTの出力端子Gより出力する。IV
は本考案の部分であり、エキサイタEXTの正側の半波電
圧を抵抗R2、R3で分割し、ツェナーダイオードZ2を通し
て、エキサイタEXTの出力電圧を検出し、設定電圧以上
になった時サイリスタS2がONする。
FIG. 2 shows an embodiment of the present invention, in which I is a basic circuit of a condenser charging / discharging type ignition device, and an exciter EXT.
Only the positive half-wave of is charged to the ignition capacitor C 1 through the diode D 1, and the ignition timing signal from the output terminal G of the control circuit CONT fires the thyristor S 1 to charge the ignition capacitor C 1 . Is discharged to the ignition coil ING. II is the power supply circuit of the control circuit, and the exciter EXT
The positive half-wave of is charged to the capacitor C 2 through the diode D 3 and the resistor R 4 to the voltage value of the Zener diode Z 1 . Further, when the exciter EXT becomes overvoltage and the thyristor S 2 is ignited at medium and high speeds, the voltage generated in the resistor R 6 is similarly charged in the capacitor C 2 through the diode D 4 and the resistor R 7 . III is a control circuit that determines the ignition timing, and inputs the ignition timing signal from the pulsar coil PC to the input terminal IN of the control circuit CONT. Input the control circuit power supply to the terminal V D ,
The ignition signal is output from the output terminal G of the control circuit CONT. IV
Is the part of the present invention, in which the positive half-wave voltage of the exciter EXT is divided by the resistors R 2 and R 3 , the output voltage of the exciter EXT is detected through the Zener diode Z 2 , and when the voltage exceeds the set voltage. Thyristor S 2 turns on.

このことにより点火用コンデンサーC1電圧は一定電圧
におさえられる。又、サイリスタS2がONしたことにより
エキサイタEXTの出力電圧は、ほとんど抵抗R6に印加さ
れる。この電圧はコンデンサーC2に充電され制御回路の
電源供給源となる。
This keeps the ignition capacitor C 1 voltage constant. Further, since the thyristor S 2 is turned on, almost all the output voltage of the exciter EXT is applied to the resistor R 6 . This voltage is charged in the capacitor C 2 and becomes the power supply source of the control circuit.

エンジンの動作状態について考えられると低速時に於
いては、エキサイタEXTの発生出力電圧が低いため、サ
イリスタS2は点弧せず抵抗R6には電圧が発生しない。従
って、コンデンサーC2はエキサイタ電圧をダイオード
D3、抵抗R4を通して充電し、これが制御回路CONTの電源
となる。
Considering the operating state of the engine, at low speed, the generated output voltage of the exciter EXT is low, so that the thyristor S 2 does not fire and the resistor R 6 does not generate a voltage. Therefore, the capacitor C 2 is connected to the exciter voltage
It is charged through D 3 and resistor R 4 , and this becomes the power supply for the control circuit CONT.

次に、中高速時はエキサイタEXTの発生電圧が高くな
るため、サイリスタS2のON動作電圧点(点火用コンデン
サー一定電圧設定点)でサイリスタS2は抵抗R6を通して
導通状態となる。このことにより、第2図ブロックIII
のループL1に流れる電流が減少し、コンデンサーC2は充
電不足となる。しかし、サイリスタS2がONしたタイミン
グで抵抗R6には、エキサイタEXTの出力電圧が印加され
るので、この印加電圧は第2図ブロックIVのループL2
通して、コンデンサーC2に充電され、常にコンデンサー
C2は、ツェナーダイオードZ1の電圧レベルに保たれ、制
御回路CONTは電源不足及び電源変動がなくなる。
Next, at medium and high speed because the higher the voltage generated exciter EXT, thyristors S 2 in ON operating voltage point of the thyristor S 2 (ignition capacitor a constant voltage set point) becomes conductive through the resistor R 6. As a result, the block III in FIG.
The current flowing in the loop L 1 of the capacitor decreases, and the capacitor C 2 becomes insufficiently charged. However, since the output voltage of the exciter EXT is applied to the resistor R 6 at the timing when the thyristor S 2 is turned on, this applied voltage is charged in the capacitor C 2 through the loop L 2 of the block IV in FIG. condenser
C 2 is maintained at the voltage level of the Zener diode Z 1 , and the control circuit CONT eliminates power shortage and power fluctuation.

本考案により、点火用コンデンサーの過電圧保護回路
を有する点火装置に於いて、低速回転から高速回転まで
に亘って制御回路の電源不足及び変動を解決することが
出来る回路を提案するものであり、コンデンサー充放電
式点火装置には有用である。
According to the present invention, in an ignition device having an overvoltage protection circuit for an ignition capacitor, it is proposed to provide a circuit capable of solving a power shortage and fluctuation of a control circuit from low speed rotation to high speed rotation. It is useful for a charge-discharge type ignition device.

【図面の簡単な説明】[Brief description of drawings]

第1図は従来のコンデンサー充放電式点火装置の回路
例、第2図は本考案のコンデンサー充放電式点火装置の
実施例である。 D14…整流用ダイオード、Z1…電源電圧用ツェナーダ
イオード、Z2…エキサイタコイル電圧検出用ツェナーダ
イオード、C1…点火用コンデンサー、C2…電源用コンデ
ンサー、S1…点火用サイリスタ、S2…エキサイタコイル
短絡用、R17…抵抗CONT点火時期制御用回路、EXT…エ
キサイタコイル、IGN…イグニッションコイル、PC…バ
ルサーコイル。
FIG. 1 shows a circuit example of a conventional capacitor charging / discharging ignition device, and FIG. 2 shows an embodiment of the capacitor charging / discharging ignition device of the present invention. D 1 to 4 ... rectifying diode, Z 1 ... power supply voltage Zener diode, Z 2 ... exciter coil voltage detection Zener diode, C 1 ... ignition capacitor, C 2 ... power supply capacitor, S 1 ... ignition thyristor, S 2 … Exciter coil short-circuit, R 1 to 7 … Resistor CONT Ignition timing control circuit, EXT… Exciter coil, IGN… Ignition coil, PC… Balcer coil.

Claims (1)

(57)【実用新案登録請求の範囲】(57) [Scope of utility model registration request] 【請求項1】エキサイタ出力の正方向半波電圧を整流す
るダイオードを介して充電されるコンデンサの充電々荷
を、前記エキサイタ出力の負方向半波電圧で点弧される
サイリスタによって点火コイルに放電せしめ、かつ前記
エキサイタ出力が過電圧時、半導体スイッチによって該
エキサイタ出力を短絡する過電圧保護回路を有したコン
デンサー充放電式点火装置に於いて、前記コンデンサの
電荷を放電せしめる為の前記サイリスタに点弧信号を送
出する制御回路電源は、エキサイタ出力からダイオード
を通して供給すると共に、前記過電圧保護用半導体スイ
ッチとアース間に抵抗を直列接続し、該抵抗の端子電圧
をダイオードを通して前記制御回路に供給する事を特徴
としたコンデンサー充放電式点火装置。
1. A thyristor, which is charged by a negative charge half-wave voltage of the exciter output, discharges a charged charge of a capacitor charged through a diode that rectifies the positive half-wave voltage of the exciter output to an ignition coil. In a capacitor charging / discharging ignition device having an overvoltage protection circuit that short-circuits the exciter output by a semiconductor switch when the exciter output is overvoltage, an ignition signal is output to the thyristor for discharging the charge of the capacitor. The control circuit power source for transmitting the voltage is supplied from the exciter output through a diode, a resistor is connected in series between the overvoltage protection semiconductor switch and ground, and the terminal voltage of the resistor is supplied to the control circuit through the diode. The condenser charging / discharging type ignition device.
JP2546590U 1990-03-13 1990-03-13 Capacitor charge / discharge type ignition device Expired - Lifetime JP2515397Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2546590U JP2515397Y2 (en) 1990-03-13 1990-03-13 Capacitor charge / discharge type ignition device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2546590U JP2515397Y2 (en) 1990-03-13 1990-03-13 Capacitor charge / discharge type ignition device

Publications (2)

Publication Number Publication Date
JPH03116417U JPH03116417U (en) 1991-12-03
JP2515397Y2 true JP2515397Y2 (en) 1996-10-30

Family

ID=31528400

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2546590U Expired - Lifetime JP2515397Y2 (en) 1990-03-13 1990-03-13 Capacitor charge / discharge type ignition device

Country Status (1)

Country Link
JP (1) JP2515397Y2 (en)

Also Published As

Publication number Publication date
JPH03116417U (en) 1991-12-03

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