JPS6155617B2 - - Google Patents
Info
- Publication number
- JPS6155617B2 JPS6155617B2 JP4536479A JP4536479A JPS6155617B2 JP S6155617 B2 JPS6155617 B2 JP S6155617B2 JP 4536479 A JP4536479 A JP 4536479A JP 4536479 A JP4536479 A JP 4536479A JP S6155617 B2 JPS6155617 B2 JP S6155617B2
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- output
- circuit
- period
- rectifier
- 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
Links
- 239000003990 capacitor Substances 0.000 claims description 39
- 238000001514 detection method Methods 0.000 claims description 11
- 238000002485 combustion reaction Methods 0.000 claims description 8
- 230000002265 prevention Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 2
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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
- F02P9/00—Electric spark ignition control, not otherwise provided for
- F02P9/002—Control of spark intensity, intensifying, lengthening, suppression
- F02P9/005—Control of spark intensity, intensifying, lengthening, suppression by weakening or suppression of sparks to limit the engine speed
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)
Description
【発明の詳細な説明】
本発明はコンデンサ放電式内燃機関点火装置に
係り、特にオートバイ、般外機等の機関に好適な
過回転防止装置を備えたコンデンサ放電式内燃機
関点火装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a capacitor discharge type internal combustion engine ignition system, and more particularly to a capacitor discharge type internal combustion engine ignition system equipped with an overspeed prevention device suitable for engines such as motorcycles and general purpose motors.
従来オートバイ等の機関には特開昭54―10837
号公報等で知られているコンデンサ放電式の点火
装置が広く用いられている。ところが、オートバ
イ等はレジヤー、スポーツ的要素が強くモトクロ
ス又は悪路等で運転されることがしばしばある。
そのため車輪が空転し機関回転が無負荷で異常に
高くなることがある。これにはいわゆるオーバレ
ボ防止スイツチを運転者が操作し、もしくは、充
電コイルの出力を検出して、ある電圧以上で発電
出力を抑える方式等が用いられていたが、精度が
悪く、調整がむずかしかつた。 Conventionally, Japanese Patent Application Publication No. 54-10837 was used for engines such as motorcycles.
A capacitor discharge type ignition device, which is known from Japanese Patent Publication No. 2003-111002, is widely used. However, motorcycles and the like have strong leisure and sports elements, and are often driven on motocross or on rough roads.
As a result, the wheels may spin and the engine speed may become abnormally high under no load. For this purpose, the driver operated a so-called overrev prevention switch, or detected the output of the charging coil and suppressed the power generation output above a certain voltage, but these methods were inaccurate, difficult to adjust, and Ta.
一方、特開昭49―134378号公報にはエンジン過
回転防止装置が開示されているが、これはフライ
ホイールマグネトの発生電圧を利用するものであ
り、これでは機関の過回転を、特に多気筒エンジ
ンにおいて正確に判断することが不可能であると
いう欠点を有していた。 On the other hand, Japanese Unexamined Patent Publication No. 134378/1984 discloses an engine overspeed prevention device, but this uses the voltage generated by the flywheel magneto. It had the disadvantage that it was impossible to judge accurately in the engine.
本発明の目的は、信頼性の高い過回転防止装置
を備えたコンデンサ放電式内燃機関点火装置を提
供すること、特に多気筒エンジンに適したコンデ
ンサ放電式内燃機関点火装置を提供することにあ
る。 An object of the present invention is to provide a capacitor discharge type internal combustion engine ignition system equipped with a highly reliable overspeed prevention device, and particularly to provide a capacitor discharge type internal combustion engine ignition system suitable for a multi-cylinder engine.
本発明は、充電コイルの出力をコンデンサに充
電し、その電荷を機関の点火時期に応じて点火コ
イルの一次側に放流し二次電圧を得てなるコンデ
ンサ放電式点火装置であつて、コンデンサは点火
コイルと直列接続されその放電は、機関の回転に
応じて各気筒毎に点火信号を出力する複数の信号
発電機の出力によつて制御される制御極対整流器
のオン時に交互に行われるように構成されてい
る。そして充電コイルの出力端には、前記複数の
点火信号発電機に同期して得られる同期パルスの
出力を波形成形し、パルスとパルスの時間を比較
して回転数を検出するようにした回転数検出装置
の出力に応答する制御極付整流器を設けている。
これによつて、簡単な構成で精度良く多気筒内燃
機関の過回転防止が行える。 The present invention is a capacitor discharge type ignition device that charges a capacitor with the output of a charging coil and discharges the charge to the primary side of the ignition coil in accordance with the ignition timing of the engine to obtain a secondary voltage. It is connected in series with the ignition coil, and its discharge is performed alternately when the control pole pair rectifier is turned on, which is controlled by the output of a plurality of signal generators that output ignition signals for each cylinder according to the rotation of the engine. It is composed of At the output end of the charging coil, the output of the synchronized pulse obtained in synchronization with the plurality of ignition signal generators is shaped into a waveform, and the rotation speed is detected by comparing the times of the pulses. A rectifier with control poles is provided responsive to the output of the detection device.
With this, it is possible to prevent over-speeding of a multi-cylinder internal combustion engine with high accuracy with a simple configuration.
以下本発明を図面に示す実施例に基づき説明す
ると、第１図において、１は低速と高速からなる
充電コイルで、その出力端の正極には夫々整流器
２，２ａ，２ｂを介しコンデンサ３，３ａ，３ｂ
と、第１、第２、第３の点火コイル４，４ｂ，４
ｃを接続したものを並列接続し、前記夫々点火コ
イルの二次側には点火プラグ５，５ａ，５ｂを接
続している。そして前記コンデンサ３，３ａ，３
ｂに充電された電荷は点火コイルと閉回路なす第
１〜第３の制御極付整流器６，６ａ，６ｂを介し
て放電する様に構成され、該制御極付整流器の第
１の制御極は第１の信号発電コイル７の正側に、
第３の制御極付整流器６ｂの制御極を負側に接続
されている。一方第２の制御極付整流器６ａの制
御極は第２の信号発電コイル７ｂの正側に接続さ
れている。また夫々制御極付整流器６，６ａ，６
ｂの信号源である信号発電コイル７，７ｂの出力
は夫々整流器８，８ａ，８ｂを介して回転数検出
装置９の入力としている。一方充電コイル１の負
側出力も整流器８ｃを介して前記検出装置９に入
力され、電源として用いられている。本検出装置
９で得られた出力は充電コイル１の出力端に設け
られた制御極付整流器１０の制御極に供給され、
オン時に充電機能を阻止し点火回路を無効にす
る。 The present invention will be described below based on an embodiment shown in the drawings. In FIG. 1, reference numeral 1 denotes a charging coil consisting of a low-speed and a high-speed charging coil, and the positive terminal of the output terminal thereof is connected to a capacitor 3, 3a via a rectifier 2, 2a, 2b, respectively. ,3b
and first, second, and third ignition coils 4, 4b, 4
c are connected in parallel, and spark plugs 5, 5a, and 5b are connected to the secondary side of each of the ignition coils. and the capacitors 3, 3a, 3
The electric charge charged in b is configured to be discharged through first to third rectifiers with control poles 6, 6a, 6b forming a closed circuit with the ignition coil, and the first control pole of the rectifier with control poles is On the positive side of the first signal generation coil 7,
The control pole of the third rectifier with control pole 6b is connected to the negative side. On the other hand, the control pole of the second rectifier with control pole 6a is connected to the positive side of the second signal generating coil 7b. In addition, rectifiers 6, 6a, 6 with control poles, respectively.
The outputs of signal generator coils 7 and 7b, which are signal sources of signal b, are input to a rotation speed detection device 9 via rectifiers 8, 8a and 8b, respectively. On the other hand, the negative output of the charging coil 1 is also input to the detection device 9 via the rectifier 8c, and is used as a power source. The output obtained by the detection device 9 is supplied to a control pole of a rectifier with a control pole 10 provided at the output end of the charging coil 1.
When turned on, it blocks the charging function and disables the ignition circuit.
回転数検出装置において、１１〜２４は抵抗、
２５〜２７はコンデンサ、２８〜３２はトランジ
スタ、３３はツエナーダイオードを示す。入力端
子である抵抗１１の一端にはピツクアツプの出力
として信号発電機の回転数に比例して発生する周
期のパルスＰINが入力される。トランジスタ２８
はパルスの入力される短時間のみオンとなつてコ
ンデンサ２５を放電し、その他の期間はオフとな
つて電源電圧Ｂから抵抗１３を通した電流でコン
デンサ２４を充電する。これにより、コンデンサ
２５の電圧V1はパルスＰINの周期に一致した周
期の鋸歯状波になる。トランジスタ２９と３０は
抵抗１６，１７で比較基準電圧V2が与えられる
差動増幅器構成の比較器にされ、コンデンサ２５
の電圧を比較入力にし、V1がV2を越えた期間の
みトランジスタ２９がオフし、その他の期間はオ
フし、V1がV2を越えた期間をその時間幅を持つ
パルスとして検出する。トランジスタ２９の
ON，OFFを入力とするトランジスタ３１は、ト
ランジスタ２９のオンで直ちにオンし、トランジ
スタ２９のオフでは抵抗１９を通したコンデンサ
２６の充電期間だけ遅れてオフする。これによ
り、トランジスタ３１の出力はV1がV2を越えた
時間幅を持つパルスに対してコンデンサ２６と抵
抗１８の時定数で決まる時間を加えた時間幅のパ
ルスP21になる。トランジスタ３２はトランジス
タ３１の出力P21に同じにオン，オフ動作し、オ
ン期間に抵抗２３を通してコンデンサ２７を放電
し、オフ期間に抵抗２２を通してコンデンサ２７
を充電する。ツエナーダイオード３３はコンデン
サ２７の電圧V3がそのツエナー電圧を越えたか
否かで導通、不導通になり、出力端子Ｐに検出信
号としてのオン，オフ信号を出力する。 In the rotation speed detection device, 11 to 24 are resistors;
25 to 27 are capacitors, 28 to 32 are transistors, and 33 is a Zener diode. A pulse P IN having a cycle generated in proportion to the number of revolutions of the signal generator is input as the output of the pickup to one end of the resistor 11, which is an input terminal. transistor 28
is turned on only for a short time when a pulse is input, discharging the capacitor 25, and is turned off for the rest of the period, charging the capacitor 24 with the current from the power supply voltage B through the resistor 13. As a result, the voltage V 1 of the capacitor 25 becomes a sawtooth wave with a period matching the period of the pulse P IN . The transistors 29 and 30 are configured as a comparator with a differential amplifier configuration to which a comparison reference voltage V 2 is provided by resistors 16 and 17, and a capacitor 25
The transistor 29 is turned off only during the period when V 1 exceeds V 2 and turned off during the other periods, and the period during which V 1 exceeds V 2 is detected as a pulse having the time width. of transistor 29
The transistor 31 which receives ON and OFF inputs is turned on immediately when the transistor 29 is turned on, and is turned off after a delay of the charging period of the capacitor 26 through the resistor 19 when the transistor 29 is turned off. As a result, the output of the transistor 31 becomes a pulse P 21 having a time width that is the sum of the time determined by the time constants of the capacitor 26 and the resistor 18 to the pulse having a time width in which V 1 exceeds V 2 . The transistor 32 turns on and off in the same way as the output P 21 of the transistor 31, discharges the capacitor 27 through the resistor 23 during the on period, and discharges the capacitor 27 through the resistor 22 during the off period.
to charge. The Zener diode 33 becomes conductive or non-conductive depending on whether the voltage V 3 of the capacitor 27 exceeds the Zener voltage, and outputs an on/off signal as a detection signal to the output terminal P.
こうした構成において、回転体の低速回転時に
は、第２図に各部波形を示す如く、入力パルスＰ
INのパルス間隔が長く、T1時間後から次の入力
パルスまでの時間はコンデンサ２５の充電電圧
V1は基準電圧V2を越える期間であり、トランジ
スタ３１の出力P21はT1時間後から次の入力パル
スがあるまでの期間T3に加えてコンデンサ２６
の充電期間T4までオンし、残りのT2期間（T1―
T4）だけオフする。従つて、コンデンサ２７の充
電期間はT2期間であり、残りの期間は放電に供
される。その充電電圧は第２図のV3に実線で示
すようになり、入力パルスＰINの周期がT1に近
い値になる最大電圧においても期間T4の放電期
間が確保され、平均電圧としては低い値（第２図
のV3に鎖線で示す）になる。 In such a configuration, when the rotating body rotates at low speed, the input pulse P
The IN pulse interval is long, and the time from T 1 hour to the next input pulse is the charging voltage of capacitor 25.
V 1 is the period in which the reference voltage V 2 is exceeded, and the output P 21 of the transistor 31 is the period T 3 from T 1 hour until the next input pulse, plus the capacitor 26
is turned on until the charging period T 4 , and the remaining T 2 period (T 1 -
T4 ) is turned off. Therefore, the charging period of the capacitor 27 is the T2 period, and the remaining period is used for discharging. The charging voltage is shown by the solid line V3 in Figure 2, and even at the maximum voltage where the period of the input pulse P IN is close to T1 , a discharge period of T4 is secured, and the average voltage is It becomes a low value (shown by the dashed line at V 3 in Figure 2).
一方、高速回転になると、第３図に示すよう
に、入力パルスＰINの間隔が短かく、コンデンサ
２５の充電電圧も基準レベルV2に達しなくな
る。従つて、トランジスタ３１，３２はオフ状態
を保持し、コンデンサ２７は充電状態が継続して
電源電圧＋Ｂまで上昇する。 On the other hand, when the motor rotates at high speed, the interval between input pulses P IN becomes short as shown in FIG. 3, and the charging voltage of the capacitor 25 does not reach the reference level V2 . Therefore, the transistors 31 and 32 remain off, and the capacitor 27 continues to be charged, rising to the power supply voltage +B.
上記第２図，第３図の波形図から明らかなよう
に、入力パルスＰINの周期が基準電圧V2に相当
する検出回転数以下であれば、コンデンサ２７の
充電期間は少なくともT4期間だけ少なくなり、
逆にＰINの周期が検出回転数を越えるとコンデン
サ２７は充電されつづける。従つて、コンデンサ
１７の電圧V3は、第４図に示すように、回転体
の回転数Ｎが検出回転数No以下にあつては低く
抑えられ、Noを越えた際には急激に＋Ｂレベル
まで上昇する。そして、コンデンサ２７の電圧
V3の変化に対してツエナーダイオード３３のツ
エナー電圧をほぼ中央のVzに設定しておけば、
Vzを境にしてコンデンサ２７の電圧変化をオ
ン，オフ信号として取出すことができる。なお、
破線は期間T4を設けない場合のV3変化を示す。 As is clear from the waveform diagrams in FIGS. 2 and 3 above, if the period of the input pulse P IN is equal to or less than the detection rotation speed corresponding to the reference voltage V 2 , the charging period of the capacitor 27 is at least T 4 period. becomes less,
Conversely, when the period of P IN exceeds the detected rotation speed, the capacitor 27 continues to be charged. Therefore, as shown in Fig. 4, the voltage V3 across the capacitor 17 is kept low when the rotational speed N of the rotating body is below the detected rotational speed No, and when it exceeds No, it suddenly drops to the +B level. rises to. And the voltage of capacitor 27
If the Zener voltage of the Zener diode 33 is set to approximately the center Vz in response to changes in V3 ,
The voltage change of the capacitor 27 with Vz as the boundary can be taken out as an on/off signal. In addition,
The dashed line shows the change in V3 when period T4 is not provided.
このようにして回転数検出装置９に出力があつ
た場合は、ある定められた回転領域以上であるた
め制御極付整流器１０がオンし点火に供するコン
デンサ３〜３６への充電を阻止し、点火機能を不
能にする。 In this way, when the rotation speed detection device 9 receives an output, since the rotation speed is above a certain determined rotation range, the rectifier with control pole 10 turns on and prevents charging of the capacitors 3 to 36 used for ignition. Disable functionality.
上述したように、本発明によれば、多気筒エン
ジンにおいて、前記多気筒数に対応した数の点火
信号発電機からの出力を利用してエンジン回転数
を検出することから、特にコンデンサの充放電を
利用して過回転を検出する場合、その検出精度を
高めることができ、これにより、信頼性の高い過
回転防止装置を備えた多気筒エンジン用コンデン
サ放電式内燃機関点火装置を提供することが可能
となる。 As described above, according to the present invention, in a multi-cylinder engine, the engine rotation speed is detected using the output from the ignition signal generators of the number corresponding to the number of cylinders. When detecting overspeed using the above, the detection accuracy can be improved, and thereby it is possible to provide a capacitor discharge type internal combustion engine ignition system for a multi-cylinder engine equipped with a highly reliable overspeed prevention device. It becomes possible.
第１図は本発明の点火装置の一実施例を示す回
路図、第２図乃至第４図は第１図の動作を説明す
るための波形図および特性図である。
１……充電コイル、７，７ｂ……信号コイル、
９……回転数検出装置、１０……制御極付整流
器、２５〜２７……コンデンサ、２８〜３２……
トランジスタ、３３……ツエナーダイオード。
FIG. 1 is a circuit diagram showing one embodiment of the ignition device of the present invention, and FIGS. 2 to 4 are waveform diagrams and characteristic diagrams for explaining the operation of FIG. 1. 1... Charging coil, 7, 7b... Signal coil,
9... Rotation speed detection device, 10... Rectifier with control pole, 25-27... Capacitor, 28-32...
Transistor, 33... Zener diode.
Claims (1)
続されたコンデンサと点火コイルを整流器を介し
て接続し、かつ前記コンデンサの充電電荷を気筒
に対した数の複数の信号発電機の出力によつて制
御される制御極対整流器の導通時に放電し、前記
点火コイルに高電圧を得てなるコンデンサ放電式
内燃機関点火装置において、前記充電コイルは、
その出力端に前記複数の信号発電機に比例した周
期のパルスから該周期を持つ鋸歯状波を得る回路
と、該鋸歯状波の出力が検出回転数に相当する所
定レベルを越えた時間を加えた時間幅を持つ矩形
波を発生させる回路と、該矩形波の存在しない時
間だけコンデンサを充電し、矩形波発生で該コン
デンサを放電させる回路と、該コンデンサ電圧が
所定レベル以上にあるか否かでオン，オフ信号を
発生させる回路とを備え、かつ充電コイルの出力
を電源とする回転数検出装置の出力によつて制御
される制御極付整流器を接続していることを特徴
とした多気筒エンジン用コンデンサ放電式内燃機
関点火装置。1 A capacitor and an ignition coil connected in series or parallel are connected to the output end of the charging coil via a rectifier, and the charging charge of the capacitor is controlled by the output of a plurality of signal generators, the number of which corresponds to the number of cylinders. In the capacitor discharge type internal combustion engine ignition device, the charging coil discharges when the control pole pair and the rectifier are connected to obtain a high voltage to the ignition coil.
A circuit for obtaining a sawtooth wave having a period from pulses having a period proportional to the plurality of signal generators is added to the output terminal thereof, and a time period during which the output of the sawtooth wave exceeds a predetermined level corresponding to the detected rotation speed is added. a circuit that generates a rectangular wave with a time width of a specified time width, a circuit that charges a capacitor during the time when the rectangular wave is not present, and discharges the capacitor by generating the rectangular wave; and a circuit that determines whether the voltage of the capacitor is above a predetermined level. A multi-cylinder, characterized in that it is equipped with a circuit that generates ON and OFF signals at the same time, and is connected to a rectifier with control poles that is controlled by the output of a rotation speed detection device whose power source is the output of the charging coil. Capacitor discharge type internal combustion engine ignition system for engines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4536479A JPS55137363A (en) | 1979-04-16 | 1979-04-16 | Capacitor discharge type ignition device of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4536479A JPS55137363A (en) | 1979-04-16 | 1979-04-16 | Capacitor discharge type ignition device of internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55137363A JPS55137363A (en) | 1980-10-27 |
| JPS6155617B2 true JPS6155617B2 (en) | 1986-11-28 |
Family
ID=12717210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4536479A Granted JPS55137363A (en) | 1979-04-16 | 1979-04-16 | Capacitor discharge type ignition device of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55137363A (en) |
-
1979
- 1979-04-16 JP JP4536479A patent/JPS55137363A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55137363A (en) | 1980-10-27 |
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