JPS59226275A - Capacity discharge type ignition device - Google Patents

Capacity discharge type ignition device

Info

Publication number
JPS59226275A
JPS59226275A JP10039883A JP10039883A JPS59226275A JP S59226275 A JPS59226275 A JP S59226275A JP 10039883 A JP10039883 A JP 10039883A JP 10039883 A JP10039883 A JP 10039883A JP S59226275 A JPS59226275 A JP S59226275A
Authority
JP
Japan
Prior art keywords
coil
capacitor
voltage
transistor
generated
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.)
Pending
Application number
JP10039883A
Other languages
Japanese (ja)
Inventor
Nobuo Miura
信夫 三浦
Norihisa Ishii
則久 石井
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.)
Honda Motor Co Ltd
Original Assignee
Honda Motor 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 Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to JP10039883A priority Critical patent/JPS59226275A/en
Publication of JPS59226275A publication Critical patent/JPS59226275A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02PIGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P3/00Other installations
    • F02P3/06Other installations having capacitive energy storage
    • F02P3/08Layout of circuits
    • F02P3/0876Layout of circuits the storage capacitor being charged by means of an energy converter (DC-DC converter) or of an intermediate storage inductance
    • F02P3/0884Closing the discharge circuit of the storage capacitor with semiconductor devices

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)

Abstract

PURPOSE:To make an expensive boosting transformer unnecessary and reduce the cost of the device by a method wherein a boosting means is constituted of a single coil connected to an electric source and a capacitor is charged by a counter-electromotive force generated upon the interruption of conduction of the coil. CONSTITUTION:When an A.C. voltage, generated in a lamp coil 1, is rectified by a diode D1, thereafter, is impressed on the base of a transistor Q1 through resistors R2, R1 to put the transistor ON, a coil L is conducted and the capacitor C1 is charged through the resistor R3 and the diode D2. Then, in case the A.C. voltage of the coil 1 has exceeded a peak value, the voltage at a point A becomes lower than the terminal voltage of the capacitor C1 and the transistor Q1 is put ON, the capacitor C1 is discharged and the transistor Q2 is put ON. Accordingly, the transistor Q1 is put OFF and a high voltage counter electromotive force is generated in the coil L at this moment whereby the capacitor C2 is charged. Thereafter, when a thyristor SCR2 is triggered, the capacitor C2 is discharged and spark is generated in an ignition plug 4 by a high voltage generated in a secondary coil 3b for the ignition coil 3.

Description

【発明の詳細な説明】 本発明は、容量放電式点火装置に関する。[Detailed description of the invention] The present invention relates to a capacitive discharge type ignition device.

現在用いられている容量放電式点火装置のほとんどは、
交流発電機内に専用のコイルを設け、このコイルに発生
する交流をその捷ま使用してコンデンサを充電させてい
るが、該コイルは細い線を数多く巻くことにより形成さ
れるものなので、熱や耐圧等に充分注意して製造しなけ
ればならず、作業性が悪く、高価なものとなってしまう
Most of the capacitive discharge igniters currently in use are
A special coil is installed inside the alternator, and the alternating current generated by this coil is used to charge the capacitor, but since the coil is formed by winding many thin wires, there is no heat or voltage resistance. etc., and must be manufactured with sufficient care, resulting in poor workability and high cost.

そこで、本発明は、コンデンザ充電用として既設の発電
コイルを用いかつ単一のコイルにて昇圧手段を構成する
ことによシ、コスト低減を可能とした容量放電式点火装
置を提供することを目的とする。
SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a capacitive discharge type ignition device that makes it possible to reduce costs by using an existing power generating coil for charging a capacitor and configuring a boosting means with a single coil. shall be.

本発明による容量放電式点火装置においては、一端が車
両の電源に接続されたコイル素子を設け、このコイル素
子への通電を遮断する際に発生するコイル素子の逆起電
力を、該コイル素子の他端に接続された蓄電手段に充電
する構成となっている。
In the capacitive discharge type ignition device according to the present invention, a coil element is provided whose one end is connected to the power source of the vehicle, and the back electromotive force of the coil element generated when the current supply to the coil element is cut off is absorbed by the coil element. It is configured to charge the power storage means connected to the other end.

以下、図面を用いて本発明の実施例を詳細に説明する。Embodiments of the present invention will be described in detail below with reference to the drawings.

第1図は、本発明の一実施例を示す回路図である。本図
において、■は例えばランノを点灯駆動するための既設
のラングコイルであり、このランプコイル1に誘起され
た交流電圧はダイオードD1で整流される。ダイオード
1〕1のカソードにはコイルLの一端が接続され、コイ
ルLの他端には1・ランノスタQ、のコレクタが接続さ
れている。トランジスタQ、は、エミッタが接地されか
つベースが抵抗R,、、R,2を介してダイオードD1
のカンードに接続されており、抵抗R,,R,の共通接
続点にコレクタが接続されかつエミッタが接地されたト
ランジスタQ2と共に、コイルLへの通電を制御するス
イッチング手段6を構成している。
FIG. 1 is a circuit diagram showing one embodiment of the present invention. In this figure, ■ is an existing rung coil for lighting and driving a lamp, for example, and the alternating current voltage induced in this lamp coil 1 is rectified by a diode D1. One end of a coil L is connected to the cathode of the diode 1]1, and the collector of the lannostar Q is connected to the other end of the coil L. The transistor Q, has its emitter grounded and its base connected to the diode D1 via the resistors R, , R,2.
The switching means 6 for controlling the current supply to the coil L is configured together with a transistor Q2 whose collector is connected to the common connection point of the resistors R, , R, and whose emitter is grounded.

ダイオードD10カソードとアースとの間には、抵抗B
、3、ダイオードD2及びコンデンサC5が直列接続さ
れ、ダイオードD2及びコンデンサC1の直列接続回路
には抵抗R,4が並列接続され、更にダイオードD2の
アノード及びカンードにトランジスタQ3のベース及び
エミッタがそれぞれ接続されかつトランジスタQ、のコ
レクタが、抵抗1も、を介して接地されたトランジスタ
Q2のベースに抵抗■t6を介して接続されており、以
上によって上記スイッチング手段のスイッチング動作を
制御する制御手段7が構成されている。
A resistor B is connected between the diode D10 cathode and ground.
, 3. Diode D2 and capacitor C5 are connected in series, resistor R, 4 is connected in parallel to the series connection circuit of diode D2 and capacitor C1, and the base and emitter of transistor Q3 are connected to the anode and cande of diode D2, respectively. The collector of the transistor Q is connected via the resistor t6 to the base of the transistor Q2, which is also grounded via the resistor 1, and the control means 7 for controlling the switching operation of the switching means is thereby controlled. It is configured.

トランジスタQ1のコレクタには、トランジスタQ1の
オフ時にコイルLによる逆起電力が発生し、この逆起電
力はダイオードD3を経てコンデンサC2ヲ充電する。
A back electromotive force is generated in the collector of the transistor Q1 by the coil L when the transistor Q1 is off, and this back electromotive force charges the capacitor C2 via the diode D3.

コンデンサC2の入力端とアースとの間にばSCR,(
ザイリスタ)2が接続され、この5CR2のダートは抵
抗几、を介して接地されている。
Between the input terminal of capacitor C2 and ground, SCR, (
Zyristor) 2 is connected, and the dart of this 5CR2 is grounded via a resistor.

5CR2のケ8−トにはダイオードI)4及び抵抗It
、を介して・ぐルサコイル(図示せず)の出力電圧が印
加される。とのパルサコイルはエンノン回転数を電気的
信号として検出するものであり、エンジン回転に応じた
交流電圧を発生する。コンデンサC2の出力端にはイグ
ニッションコイル3の一次(1111コイル3αの一端
が接続され、イグニッションコイル3の二次側コイル3
bにはスパークシラグ4が接続されている。
A diode I)4 and a resistor It are connected to the gate of 5CR2.
, the output voltage of a gusset coil (not shown) is applied. The pulsar coil detects the engine rotation speed as an electrical signal and generates an alternating current voltage according to the engine rotation. The output terminal of the capacitor C2 is connected to the primary coil 3 of the ignition coil 3 (one end of the 1111 coil 3α), and the secondary coil 3 of the ignition coil 3 is connected to the output terminal of the capacitor C2.
A spark plug 4 is connected to b.

次に、本発明の作用について説明する。ランプコイルI
Kは第2図(a)に示す如き交流電圧が発生し、この交
流電圧はダイオードD1で整流された後、抵抗n、2.
n、、を介してトランジスタQ1のベースに印加されて
トランジスタQ、をオンさせると共に、コイルLに印加
され、同時に抵抗1t6及びダイオードD2を介してコ
ンデンサC4を充電する。そしてランプコイルIの交流
電圧がピーク値を越えると、(A)点の電圧がコンデン
サC1の端子電圧よシ低くなるので、トランジスタQ3
がオンとなる。これによりコンデンサC1の蓄電電荷は
抵抗■(6を経てトランジスタQ2のベースに流れ込ん
でトランジスタQ2をオンする。トランジスタQ2がオ
ンすると、トランジスタQ1がオフする。トランジスタ
Q、がオンする瞬間に、第2図(6)に示すように、コ
イルLに高圧の逆起電力が発生する。
Next, the operation of the present invention will be explained. Lamp coil I
K generates an alternating current voltage as shown in FIG.
The voltage is applied to the base of the transistor Q1 through the transistor Q1 to turn on the transistor Q, and is applied to the coil L, simultaneously charging the capacitor C4 through the resistor Itt6 and the diode D2. When the AC voltage of lamp coil I exceeds the peak value, the voltage at point (A) becomes lower than the terminal voltage of capacitor C1, so transistor Q3
turns on. As a result, the stored charge in the capacitor C1 flows into the base of the transistor Q2 through the resistor (6) and turns on the transistor Q2. When the transistor Q2 turns on, the transistor Q1 turns off. At the moment when the transistor Q turns on, the second As shown in FIG. 6, a high voltage back electromotive force is generated in the coil L.

この逆起電力でコンデンサC2を充電し、5CR2がト
リガーされた時にコンデンサC2の蓄電電荷をイグニッ
ションコイル3の一次(11,11コイル2αに放Nさ
せ、この放電エネルギーでイグニッションコイル3の二
次側コイル3bに高電圧を発生させてス・ぐ−フジラグ
4に火花放電を生じさせるのである。
The capacitor C2 is charged with this back electromotive force, and when 5CR2 is triggered, the stored charge in the capacitor C2 is released to the primary (11, 11 coil 2α) of the ignition coil 3, and this discharge energy is used to charge the secondary side of the ignition coil 3. A high voltage is generated in the coil 3b, and a spark discharge is caused in the spark plug 4.

なお、上記実施例においては、ランプコイル1を用いた
か、これに限定されることなく他の既設の発電コイルを
用い得る。また、コイルLにランプコイル1の整流出力
電圧を印加したが、コイルLにバッテリ電圧を印加する
ようにしても良く、上記実施例と同様の効果を奏する。
In the above embodiment, the lamp coil 1 is used, but the lamp coil 1 is not limited thereto, and other existing power generation coils may be used. Further, although the rectified output voltage of the lamp coil 1 is applied to the coil L, the battery voltage may be applied to the coil L, and the same effect as in the above embodiment can be obtained.

また、第1図においては、エンジンの回転に同期してコ
ンデンサC2の蓄電電荷を放電させる放電制御回路5と
して、SCR,2、抵抗H1711L8及びダイオード
D4からなる基本回路が用いられている。
Further, in FIG. 1, a basic circuit consisting of an SCR, 2, a resistor H1711L8, and a diode D4 is used as the discharge control circuit 5 that discharges the stored charge in the capacitor C2 in synchronization with the rotation of the engine.

この基本回路における最低パルサ電圧(SCI(,2の
トリが一電圧)について考えると、ダイオードD4の順
方向電圧及び5CR2の(ト1〈電圧を共に約0.7V
とした場合、抵抗]t8がかなり小抵抗としても、■、
4v以上の)lルサ電圧が必要となる。
Considering the lowest pulser voltage (SCI (, 2) is one voltage) in this basic circuit, the forward voltage of diode D4 and the voltage of (T1) of 5CR2 are both approximately 0.7V.
In this case, even if the resistance] t8 is quite small, ■,
A Lusa voltage of 4 V or higher is required.

そこで、第3図に示す様に、5CI(,2,抵抗1t7
゜R8及びダイオード■)4に加え、5(If!のカノ
ードとアースとの間に接続されたダイオード1)5と、
互いに直列に接続されてランプコイル1に並列接続され
かつ共通接続点が5CIj2のカンードに接続されたダ
イオードD6及びD7を備えた放電制御回路5αを用い
ることによシ、最低パルサ電圧を下げることができ、パ
ルサ入力側から見たケ゛−ト感度を上げることができる
。すなわち、第3図において、・マルサ電圧発生時に、
う/fコイル1が負電圧を発生する位相タイミングとす
ると、5CR2のカソードはダイオードD7の順方向電
圧分(約0.7V〕だけ逆バイアスされるので、上述し
た基本回路のときと同様な考え方をすると、ダイオード
D4とD7の各順方向電圧分が相殺され、パルサ電圧が
0.7以上あれば5CII、2を点弧出来ることになる
Therefore, as shown in Figure 3, 5CI (,2, resistance 1t7
In addition to ゜R8 and diode ■) 4, 5 (diode 1 connected between the canode of If! and ground) 5,
By using a discharge control circuit 5α comprising diodes D6 and D7 connected in series with each other, connected in parallel to the lamp coil 1, and having a common connection point connected to the cand of 5CIj2, it is possible to lower the minimum pulsar voltage. It is possible to increase the gate sensitivity as seen from the pulsar input side. That is, in Fig. 3, when the Marsa voltage is generated,
If the phase timing is such that U/f coil 1 generates a negative voltage, the cathode of 5CR2 will be reverse biased by the forward voltage of diode D7 (approximately 0.7V), so the same concept as in the basic circuit described above can be used. Then, the forward voltages of the diodes D4 and D7 are canceled out, and if the pulsar voltage is 0.7 or more, 5CII, 2 can be ignited.

なお、第3図の回路例では、パルサ電圧とランフ0コイ
ル1の交流電圧との位相合せを要するが、第4図て示す
様に、ダイオードD7にコンデンサC3を並列接続し、
一度ランプコイル1の交流電圧が負電圧になったときコ
ンデンサC3に負の電荷をためておくことにより、常に
S CR2のカソードを負にバイアスしておくことがで
き、・クルサ電圧とう/fコイル1の交流電圧との位相
合せをする必要がなくなる。なお、第4図において、コ
ンデンサC6を追加した以外の構成及び動作は第3図の
場合と同じである。
In the circuit example shown in Fig. 3, it is necessary to match the phase of the pulsar voltage and the AC voltage of the ramp 0 coil 1, but as shown in Fig. 4, a capacitor C3 is connected in parallel to the diode D7,
Once the AC voltage of the lamp coil 1 becomes a negative voltage, by storing a negative charge in the capacitor C3, the cathode of SCR2 can always be biased negatively. There is no need to perform phase matching with the AC voltage of 1. In FIG. 4, the configuration and operation are the same as in FIG. 3 except for the addition of capacitor C6.

以上説明したように、本発明によれば、車両の電源に接
続された単一のコイルにて昇圧手段を構成し、このコイ
ルへの通電を遮断する際に発生するコイルの逆起電力に
よってコンデンサを充電するようにしたので、高価な昇
圧トランスを用いる必要がなく、低コストの容量放電式
点火装置が得られる。
As explained above, according to the present invention, a single coil connected to the vehicle's power source constitutes the voltage boosting means, and the back electromotive force of the coil generated when the current to the coil is cut off causes the capacitor to rise. Since the battery is charged, there is no need to use an expensive step-up transformer, and a low-cost capacitive discharge type ignition device can be obtained.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例を示す回路図、第2図は第1
図の動作を説明するための波形図、第3図は第1図にお
ける放電制御回路の他の実施例を示す回路図、第4図は
第3図の変形例を示す回路図である。 主要部分の符号の説明 トランプコイル     2 ・S CH。 3・・・イクニノションコイル 5.5CL、5b・・・放電制御回路 量 願 人 本日」技研工業株式会社 代理人 弁理士膝村元彦
Fig. 1 is a circuit diagram showing one embodiment of the present invention, and Fig. 2 is a circuit diagram showing an embodiment of the present invention.
FIG. 3 is a circuit diagram showing another embodiment of the discharge control circuit in FIG. 1, and FIG. 4 is a circuit diagram showing a modification of FIG. 3. Explanation of symbols of main parts Trump coil 2 ・S CH. 3... Ikunotion coil 5.5CL, 5b... Discharge control circuit amount Application person Today' Giken Kogyo Co., Ltd. agent Patent attorney Motohiko Kneemura

Claims (1)

【特許請求の範囲】[Claims] 一端が車両の電源に接続されたコイル素子と、前記コイ
ル素子への通電を制御するスイッチング手段と、前記ス
イッチング手段のスイッチング動作を制御する制御手段
と、前記コイル素子の他端に接続され前記コイル素子の
逆起電力によって充電される蓄電手段と、エンジンの回
転に同期して前記蓄電手段の蓄電電荷を放電させる放電
制御手段からなることを特徴とする容量放電式点火装置
a coil element whose one end is connected to the power source of the vehicle; a switching means for controlling energization of the coil element; a control means for controlling the switching operation of the switching means; and a coil element connected to the other end of the coil element. A capacitive discharge type ignition device comprising a power storage means that is charged by a back electromotive force of an element, and a discharge control means that discharges the stored charge of the power storage means in synchronization with the rotation of the engine.
JP10039883A 1983-06-06 1983-06-06 Capacity discharge type ignition device Pending JPS59226275A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10039883A JPS59226275A (en) 1983-06-06 1983-06-06 Capacity discharge type ignition device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10039883A JPS59226275A (en) 1983-06-06 1983-06-06 Capacity discharge type ignition device

Publications (1)

Publication Number Publication Date
JPS59226275A true JPS59226275A (en) 1984-12-19

Family

ID=14272874

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10039883A Pending JPS59226275A (en) 1983-06-06 1983-06-06 Capacity discharge type ignition device

Country Status (1)

Country Link
JP (1) JPS59226275A (en)

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