JPH051651A - Condenser charge and discharge type ignition device - Google Patents

Condenser charge and discharge type ignition device

Info

Publication number
JPH051651A
JPH051651A JP17727091A JP17727091A JPH051651A JP H051651 A JPH051651 A JP H051651A JP 17727091 A JP17727091 A JP 17727091A JP 17727091 A JP17727091 A JP 17727091A JP H051651 A JPH051651 A JP H051651A
Authority
JP
Japan
Prior art keywords
circuit
timing pulse
ignition
capacitor
gate signal
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
JP17727091A
Other languages
Japanese (ja)
Inventor
Yoshio Morita
義男 森田
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 JP17727091A priority Critical patent/JPH051651A/en
Publication of JPH051651A publication Critical patent/JPH051651A/en
Pending legal-status Critical Current

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  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

PURPOSE:To improve speed limitation feeling by gradually lowering a horse power according to rise of rotation speed by way of delaying an ignition angle along with the rise of the rotation speed and by flaming-out only when the previously set rotation speed is exceeded. CONSTITUTION:A spark delay and flame-out circuit to control a gate signal of an ignition circuit is provided, and the spark delay flame-out circuit is provided with a condenser charge and discharge circuit 1 which is charged at the time of delivering a negative timing pulse and discharged through a series circuit of resistance and resistance and transistors Q1-Q4 after it stops delivering the negative timing pulse, a circuit to deliver a gate signal to the base of the transistors and a switch element to by-pass the gate signal at the time when output of the condenser charge and discharge circuit 1 reaches a specified level.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明はコンデンサ充放電式点火
装置、特にスピ−ド制限フィ−リングの向上に関するも
のである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a capacitor charging / discharging type ignition device, and more particularly to improvement of a speed limiting feeling.

【0002】[0002]

【従来技術とその問題点】エンジンの点火装置として、
ダイオ−ドにより整流された発電用コイルの出力により
コンデンサを充電しておき、タイミングパルス発生コイ
ルの送出する正タイミングパルスによりオンされるトラ
ンジスタにより、放電用サイリスタSCRに点弧電源を
与えることによって、コンデンサの電荷をイグニッショ
ンコイルに放電させてプラグの点火を行うコンデンサ充
放電式点火装置が広く使用されている。ところでこの場
合過速によるエンジントラブルなどの防止のため、スピ
−ド制限が要求される場合がある。しかし従来のものは
コンデンサ充放電式点火回路に過速回転数設定回路と失
火制御回路とを設けて、タイミングパルス発生コイルか
らの出力を用いて回転数設定回路が所定回転数以上に過
速したことを検出したとき出力を送出するようにし、こ
れにより失火制御回路のトランジスタをオンとして、前
記トランジスタのオン時放電用サイリスタのゲ−トに加
えられる点弧信号の側路を行うことにより、コンデンサ
の放電を阻止して回転数の制限を行うものである。従っ
て従来の方式では失火と同時に急激な馬力の低下を生じ
て回転数が不安定となる事態を生じ易く、所謂スピ−ド
制限フィ−リングが悪いと云う欠点がある。
2. Description of the Related Art As an engine ignition device,
The capacitor is charged by the output of the power generation coil rectified by the diode, and the ignition power source is applied to the discharging thyristor SCR by the transistor turned on by the positive timing pulse sent from the timing pulse generating coil. 2. Description of the Related Art Capacitor charging / discharging type ignition devices are widely used that ignite a plug by discharging an electric charge of a capacitor to an ignition coil. By the way, in this case, speed limitation may be required to prevent engine trouble due to overspeed. However, in the conventional one, the capacitor charging / discharging type ignition circuit is provided with an overspeed rotation speed setting circuit and a misfire control circuit, and the rotation speed setting circuit uses the output from the timing pulse generating coil to overspeed the predetermined rotation speed or more. When the output of the capacitor is detected, the transistor of the misfire control circuit is turned on, thereby bypassing the ignition signal applied to the gate of the thyristor for discharging the on-state of the transistor. The discharge is blocked to limit the number of rotations. Therefore, the conventional method is apt to cause a rapid decrease in horsepower at the same time as a misfire and an unstable rotational speed, resulting in a so-called speed limiting feeling.

【0003】[0003]

【発明の目的】本発明は上記スピ−ド制限フィ−リング
の改善を目的としてなされたものである。
OBJECTS OF THE INVENTION The present invention has been made for the purpose of improving the above speed limiting feeling.

【0004】[0004]

【問題点を解決するための本発明の手段】本発明におい
ては図1のように、通常の運転回転数範囲の上限回転数
N1までは適当とする一定点火角θ1で運転し、N1から
過速検出のため設定回転数N2に到達するまでの回転数
範囲即ちN1〜N2では、回転数の上昇と共に点火角度を
θ1からθ2まで回転方向に遅らせて回転数の上昇にもと
づく馬力を少しずつ低下させる。そして回転数が設定さ
れた上限回転数N2を越えたとき始めて失火させるよう
にして、前記従来装置におけるような急激な馬力の低下
による回転数の不安定を招くことがないようにしたもの
である。次に本発明を一実施例回路図によって詳細に説
明する。
According to the present invention, as shown in FIG. 1, the engine is operated at an appropriate constant ignition angle θ1 up to the upper limit rotation speed N1 in the normal operation rotation speed range, and the overrunning speed from N1 is exceeded. In order to detect the speed, in the rotational speed range up to the set rotational speed N2, that is, N1 to N2, the ignition angle is delayed in the rotational direction from θ1 to θ2 as the rotational speed increases, and the horsepower based on the increase in the rotational speed is gradually decreased. Let Then, when the rotational speed exceeds the set upper limit rotational speed N2, the misfire is started for the first time so as to prevent the instability of the rotational speed due to the sudden decrease in horsepower as in the conventional device. .. Next, the present invention will be described in detail with reference to an embodiment circuit diagram.

【0005】[0005]

【実施例の構成】図2は本発明の一実施例回路図、図3
はその動作説明用の波形図である。図1において1はコ
ンデンサ充放電式点火回路主回路であって、次の各部か
ら形成される。EXTは交流発電コイルを示し、エンジ
ンにより駆動されて交流出力を送出する。D0は短絡用
ダイオ−ド素子であって、発電コイルEXTの負極性電圧
を短絡する。D2は整流用ダイオ−ド、C1は充放電用コ
ンデンサ、IGNはイグニッションコイル、PGは点火プ
ラグ、SCRは放電用サイリスタである。次にPCはタイ
ミングパルス発生コイルであって、これは図3(a)の
ようにエンジン1回転毎に基準正タイミングパルス+P
と、これとの時間間隔が回転数に対応して変化する負タ
イミングパルス−Pとを送出する。2は制御用電源回路
であって、以下に説明する本発明要部回路の各種の作動
電源を別電源を用いて構成したもので自己回路から作っ
てもよいことは云うまでもない。
2 is a circuit diagram of an embodiment of the present invention, FIG.
FIG. 3 is a waveform diagram for explaining the operation. In FIG. 1, reference numeral 1 denotes a capacitor charge / discharge type ignition circuit main circuit, which is formed of the following parts. EXT indicates an alternating current generating coil, which is driven by the engine and outputs an alternating current output. D0 is a short-circuit diode element, which short-circuits the negative voltage of the magneto coil EXT. D2 is a rectifying diode, C1 is a charging / discharging capacitor, IGN is an ignition coil, PG is an ignition plug, and SCR is a discharging thyristor. Next, PC is a timing pulse generating coil, which is a reference positive timing pulse + P for each revolution of the engine as shown in FIG.
And a negative timing pulse -P whose time interval changes with the number of revolutions. Needless to say, reference numeral 2 is a control power supply circuit, which is configured by using different power supplies for various operating power supplies of the main circuit of the present invention described below.

【0006】3は本発明の要部回路であり、Q1、Q2は
正及び負タイミングパルスの波形整流用トランジスタ、
IC1、IC2はインバ−タ回路、D3、D4は整流用ダイ
オ−ド、C3、C4は充電用コンデンサ、Q3はコンデン
サC3の放電用トランジスタ、R5はコンデンサC4の放
電用抵抗、R6、Q4はコンデンサC4の放電時定数調整
用の抵抗及びトランジスタ、G1、G2はスレショルド
レベルをもつレベル変換器、Q5は遅角及び失火制御用
トランジスタ、R7、R8はベ−ス抵抗である。
Reference numeral 3 is a main circuit of the present invention, Q1 and Q2 are transistors for waveform rectification of positive and negative timing pulses,
IC1 and IC2 are inverter circuits, D3 and D4 are rectifying diodes, C3 and C4 are charging capacitors, Q3 is a discharging transistor of the capacitor C3, R5 is a discharging resistor of the capacitor C4, and R6 and Q4 are capacitors. Resistors and transistors for adjusting the discharge time constant of C4, G1 and G2 are level converters having a threshold level, Q5 is a retard and misfire control transistor, and R7 and R8 are base resistors.

【0007】この要部回路の基本動作は、先ず正のタイ
ミングパルスによりトランジスタQ1がオンし、インバ
−タIC1、ダイオ−ドD3を介してコンデンサC3を充
電する。次いで負のタイミングパルスによりトランジス
タQ2がオンし、インバ−タIC2を介して放電用トラン
ジスタQ3がオンとなりコンデンサC3の電荷を放電す
る。図3(b)は点bの波形を示す。一方トランジスタ
Q2のオン時にはインバ−タIC2、整流用ダイオ−ドD4
を介してコンデンサC4を充電する。そして、コンデン
サC4は後述するように抵抗R5、R6及びトランジスタ
Q4を介して放電する。図3(C)は(C)点波形を示
す。なお、トランジスタQ4はレベル変換器G1の出力
がハイ(H)の時オンする。同時にサイリスタSCRも
ゲ−ト信号が与えられオンする。又トランジスタQ5は
レベル変換器G2の出力がハイ(H)の時オンとなり上
記サイリスタSCRのゲ−ト信号をバイパスして、これ
をオフせしめる。以下点火動作について説明する。
In the basic operation of this essential circuit, first, the transistor Q1 is turned on by a positive timing pulse, and the capacitor C3 is charged through the inverter IC1 and the diode D3. Then, the transistor Q2 is turned on by the negative timing pulse, and the discharging transistor Q3 is turned on via the inverter IC2 to discharge the electric charge of the capacitor C3. FIG. 3B shows the waveform at the point b. On the other hand, when the transistor Q2 is on, the inverter IC2 and the rectifying diode D4
The capacitor C4 is charged via. Then, the capacitor C4 is discharged through the resistors R5 and R6 and the transistor Q4 as described later. FIG. 3C shows a point waveform (C). The transistor Q4 is turned on when the output of the level converter G1 is high (H). At the same time, the thyristor SCR is also supplied with a gate signal and turned on. The transistor Q5 is turned on when the output of the level converter G2 is high (H), bypasses the gate signal of the thyristor SCR and turns it off. The ignition operation will be described below.

【0008】[0008]

【回転数がN1以下のときの動作】回転数の上昇により
コンデンサC3、C4の充電に要する時間は変わらないも
のとする。又、回転数がN1以下のときは、コンデンサ
C4の充電々圧はレベル変換器G2のスレショルドレベル
l(図3C)以下になるように放電時定数が設定されて
いるものとする。更にコンデンサC3の充電時はレベル
変換器G1を通してサイリスタSCRにゲ−ト信号が印
加されるものとする。この状態では、点火制御用トラン
ジスタQ5は常にオフ状態であり、サイリスタSCRは
コンデンサC3が充電される時点、即ち正のタイミング
パルス+Pの送出時にサイリスタSCRは導通する。即
ち正タイミングパルス発生位置はエンジンの回転と常に
一定関係にあるから、点火角度はコンデンサC4の放電
電圧レベルがレベル変換器G2のシュレッシホ−ルドレ
ベルを越えない限り(回転数N1)θ1の一定点火角度を
維持する運転が行われ、図1の特性が得られる。
[Operation when the rotation speed is N1 or less] It is assumed that the time required to charge the capacitors C3 and C4 does not change due to the increase in the rotation speed. Further, it is assumed that the discharge time constant is set so that the charging voltage of the capacitor C4 becomes equal to or lower than the threshold level 1 (FIG. 3C) of the level converter G2 when the rotation speed is equal to or lower than N1. Further, when the capacitor C3 is charged, a gate signal is applied to the thyristor SCR through the level converter G1. In this state, the ignition control transistor Q5 is always off, and the thyristor SCR becomes conductive when the capacitor C3 is charged, that is, when the positive timing pulse + P is sent. That is, since the positive timing pulse generation position always has a constant relationship with the rotation of the engine, the ignition angle is constant (rotation speed N1) θ1 unless the discharge voltage level of the capacitor C4 exceeds the threshold voltage level of the level converter G2. Is maintained, and the characteristics shown in FIG. 1 are obtained.

【0009】[0009]

【回転数がN1を越えN2になるまでの動作】回転数の上
昇に伴いエンジン1回転に要する時間が短くなり、これ
に伴い正のタイミングパルス+Pと次の正のタイミング
パルス+Pとの時間間隔tと、正負タイミングパルス+
P−P間の時間間隔T1も短くなる。このためコンデン
サC4の放電時の傾斜はかわらないが、充放電周期は回
転数の上昇と共に次第に短くなる。このためコンデンサ
C4の放電電圧レベルは回転数の上昇と共に上昇してレ
ベル変換器G2のスレショルドレベルに達する時期は図
3(C)イ−ロに示す如く早くなり図1のN1点を越す
と、次の正のタイミングパルス到来時にはトランジスタ
Q5はオン状態であり、正のタイミングパルスによるゲ
−ト信号はトランジスタQ5によりバイバスされるため
にサイリスタSCRの点火時期は正のタイミングパルス
の発生時期から遅れ、該コンデンサC4の放電電圧レベ
ルが変換器G2のスレショルドレベルl以下となり、ト
ランジスタQ5がオフになった時点でゲ−ト信号が与え
られて点火することになる。従ってその点火角度はθ1
→θ2と遅角する。(図3d)なお、トランジスタQ4は
変換器G1の出力がハイの時オンとなり、抵抗R6を介
して、コンデンサC4の放電回路をあらたに形成する。
従ってコンデンサC4の放電の傾斜はトランジスタQ4の
オンと同期して急激に下降することになる。
[Operation until the number of revolutions exceeds N1 and reaches N2] The time required for one revolution of the engine decreases as the number of revolutions increases, and the time interval between the positive timing pulse + P and the next positive timing pulse + P t and positive / negative timing pulse +
The time interval T1 between PP is also shortened. Therefore, the inclination of the capacitor C4 at the time of discharging does not change, but the charging / discharging cycle becomes gradually shorter as the rotation speed increases. Therefore, the discharge voltage level of the capacitor C4 rises as the number of revolutions rises to reach the threshold level of the level converter G2 as shown in FIG. 3 (C), and the point exceeds the N1 point in FIG. When the next positive timing pulse arrives, the transistor Q5 is in the ON state, and the gate signal by the positive timing pulse is bypassed by the transistor Q5, so that the ignition timing of the thyristor SCR is delayed from the generation timing of the positive timing pulse. When the discharge voltage level of the capacitor C4 becomes lower than the threshold level 1 of the converter G2 and the transistor Q5 is turned off, the gate signal is given to ignite. Therefore, the ignition angle is θ1
→ Delay with θ2. (FIG. 3d) The transistor Q4 is turned on when the output of the converter G1 is high, and a new discharge circuit for the capacitor C4 is formed via the resistor R6.
Therefore, the slope of the discharge of the capacitor C4 drops sharply in synchronization with the turning on of the transistor Q4.

【0010】[0010]

【回転数がN2を越えた時の動作】更に回転数が上昇す
ると図3中(c)波形は(b)波形出力中にLレベルに
ならずトランジスタQ5はオンのままとなりSCRのゲ
−ト信号は与えられず点火出力は失火状態となる。図1
中N1〜N2の回転区間に於ける点火時期の傾斜はC4、
R5の定数を決定する事により点火時期変化開始回転数
N1は任意に設定し、次にR6の放電抵抗を変化させる事
で変化する事が出来、エンジンの出力性能に合わせた点
火時期を提供出来る。
[Operation when the number of revolutions exceeds N2] When the number of revolutions further rises, the waveform (c) in FIG. 3 does not become L level during the waveform output (b), and the transistor Q5 remains on and the gate of the SCR is turned on. No signal is given and the ignition output goes into misfire. Figure 1
The inclination of the ignition timing in the rotation section of medium N1 to N2 is C4,
The ignition timing change start rotational speed N1 can be arbitrarily set by determining the constant of R5, and then can be changed by changing the discharge resistance of R6, and the ignition timing can be provided according to the output performance of the engine. ..

【0011】[0011]

【発明の効果】以上のように本発明では過速時従来のよ
うに直ちに失火状態とせず、遅角動作を行っているので
失火までの回転数の変化が緩やかになり、急速な回転数
の低下に伴う馬力の急激な低下を来して回転数の不安定
を招くことがなくなる。従って本発明によればスピ−ド
制限フィ−リングを従来のものに比べて良好とすること
ができる。
As described above, according to the present invention, since the misfire state is not immediately generated unlike the conventional case at the time of overspeed, but the retarding operation is performed, the change in the rotation speed until the misfire becomes gentle, and the rapid rotation speed is reduced. It is possible to prevent a sudden decrease in horsepower due to the decrease and instability of the rotation speed. Therefore, according to the present invention, the speed limiting filling can be made better than the conventional one.

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

【図1】本発明の運転特性図FIG. 1 is a driving characteristic diagram of the present invention.

【図2】本発明の一実施例回路図FIG. 2 is a circuit diagram of an embodiment of the present invention.

【図3】本発明の動作説明用の波形図FIG. 3 is a waveform diagram for explaining the operation of the present invention.

【符号の説明】[Explanation of symbols]

1 主回路 2 制御電源回路 3 要部回路 EXT 発電コイル C1 充放電用コンデンサ IGN イグニッションコイル SCR サイリスタ PC タイミングパルス発生コイル IC1、IC2 インバ−タ回路 G1、G2 レベル変換器 Q1、Q2、Q3、Q4 トランジスタ 1 Main circuit 2 Control power supply circuit 3 Main circuit EXT Power generation coil C1 Charging / discharging capacitor IGN Ignition coil SCR Thyristor PC Timing pulse generating coil IC1, IC2 Inverter circuit G1, G2 Level converter Q1, Q2, Q3, Q4 Transistor

Claims (1)

【特許請求の範囲】 【請求項1】 発電コイル出力により充電されたコンデ
ンサの電荷をサイリスタを介してイグニッションコイル
に放電させることにより点火を行うコンデンサ充放電式
点火装置において、タイミングパルス発生コイルからの
正のタイミングパルス送出時から負タイミングパルス送
出停止の期間、前記サイリスタのゲ−トに信号を送出す
る点火回路と、前記ゲ−ト信号を側路する遅角、失火回
路を備え、前記遅角、失火回路は、負タイミングパルス
送出時充電され、負タイミングパルス送出停止後、抵抗
及び抵抗とトランジスタの直列回路を通して放電される
コンデンサ充放電回路と、前記トランジスタのベ−スに
前記ゲ−ト信号を送出する回路と、前記コンデンサ充放
電回路の出力が所定レベルに達した時、前記ゲ−ト信号
を側路するスイッチ素子を備えたことを特徴とするコン
デンサ充放電式点火装置。
Claim: What is claimed is: 1. A capacitor charging / discharging type ignition device for igniting by discharging an electric charge of a capacitor charged by a power generating coil output to an ignition coil through a thyristor. An ignition circuit for transmitting a signal to the gate of the thyristor, a delay angle for bypassing the gate signal, and a misfire circuit for the period from the transmission of the positive timing pulse to the stop of the transmission of the negative timing pulse. The misfire circuit is charged when a negative timing pulse is transmitted, and is discharged through a resistor and a series circuit of a resistor and a transistor after the negative timing pulse transmission is stopped, and the gate signal is supplied to the base of the transistor. And the output of the capacitor charging / discharging circuit reaches a predetermined level, the gate signal is output. Capacitor discharge ignition system, characterized in that it comprises a switch element which bypass the.
JP17727091A 1991-06-21 1991-06-21 Condenser charge and discharge type ignition device Pending JPH051651A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17727091A JPH051651A (en) 1991-06-21 1991-06-21 Condenser charge and discharge type ignition device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17727091A JPH051651A (en) 1991-06-21 1991-06-21 Condenser charge and discharge type ignition device

Publications (1)

Publication Number Publication Date
JPH051651A true JPH051651A (en) 1993-01-08

Family

ID=16028122

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17727091A Pending JPH051651A (en) 1991-06-21 1991-06-21 Condenser charge and discharge type ignition device

Country Status (1)

Country Link
JP (1) JPH051651A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106523240A (en) * 2016-06-20 2017-03-22 重庆瑜欣平瑞电子股份有限公司 TCI igniter circuit with speed limiting function

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106523240A (en) * 2016-06-20 2017-03-22 重庆瑜欣平瑞电子股份有限公司 TCI igniter circuit with speed limiting function

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