JPS6026176A - Contactless igniter for two-cycle internal-combustion engine - Google Patents
Contactless igniter for two-cycle internal-combustion engineInfo
- Publication number
- JPS6026176A JPS6026176A JP13304583A JP13304583A JPS6026176A JP S6026176 A JPS6026176 A JP S6026176A JP 13304583 A JP13304583 A JP 13304583A JP 13304583 A JP13304583 A JP 13304583A JP S6026176 A JPS6026176 A JP S6026176A
- Authority
- JP
- Japan
- Prior art keywords
- engine
- rotation
- backward
- ignition
- signal rotor
- 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.)
- Granted
Links
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
- F02P11/00—Safety means for electric spark ignition, not otherwise provided for
- F02P11/02—Preventing damage to engines or engine-driven gearing
-
- 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
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
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
Description
【発明の詳細な説明】
本発明は２サイクル内燃機関川無接点点火装置に関し、
特にその点火信号発生器の構造を改良して、機関の逆転
防止が正確にできるようにしたものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a contactless ignition device for a two-stroke internal combustion engine,
In particular, the structure of the ignition signal generator has been improved to accurately prevent the engine from reversing.
従来のものは、その点火配電器に内蔵される点火信号発
生器として第１図に示すごときのものがある。この第１
図において、機関により機関の１／２の回転で駆動され
るシャフト１に結合され、り）周に凹部２ａをもつシグ
ナルロータ２の回転によりハウジング３に固定された電
磁ピックアップ４に磁束変化が生じ、第２図の様な出力
波形が得られる。この第２図において、５は機関正回転
時の出力波形で、７がその時の点火位置であり、６ａは
機関逆回転時の出力波形で、８ａがそのときの点火位置
である。このように、機関が逆回転した場合は７から８
ａへθ！だけ点火位置をすらすことにより回転継続不可
能な点火位置となるため逆転防止ができる。A conventional type of ignition signal generator is shown in FIG. 1 as an ignition signal generator built into the ignition distributor. This first
In the figure, magnetic flux changes occur in an electromagnetic pickup 4 fixed to a housing 3 due to the rotation of a signal rotor 2 which is connected to a shaft 1 driven by an engine at 1/2 rotation of the engine and has a recess 2a on its circumference. , an output waveform as shown in FIG. 2 is obtained. In FIG. 2, 5 is the output waveform when the engine is rotating in the forward direction, 7 is the ignition position at that time, 6a is the output waveform when the engine is rotating in the reverse direction, and 8a is the ignition position at that time. In this way, if the engine rotates in reverse, the speed will change from 7 to 8.
θ to a! By shifting the ignition position by the same amount, the ignition position becomes such that it is impossible to continue the rotation, so reversal can be prevented.
ないが、逆回転は出力波形が第２図図示の６ｂで点火位
置が８ｂとなるため、ずれ角θｌ′が非常に大きくなる
。However, in reverse rotation, the output waveform is 6b and the ignition position is 8b as shown in FIG. 2, so the deviation angle θl' becomes very large.
第５図にこの時の点火配電器の配電ロータ１５ａとキャ
ップ電極１４ａ、１４ｂ、１４ｃの関係を示す（２サイ
クル３気筒エンジン）。正回転時は点火位置７において
配電ロータ１５ａとキャソプ電極１４ａとは対向してい
るが、逆回転するとθ°ずれるため点火位ｆｉ８ａ、８
ｂにおいて配電ロータは例えば破線の１５ｂで示す位置
となる。FIG. 5 shows the relationship between the power distribution rotor 15a of the ignition power distributor and the cap electrodes 14a, 14b, and 14c at this time (2-stroke, 3-cylinder engine). During forward rotation, the distribution rotor 15a and cassop electrode 14a face each other at ignition position 7, but when rotated in reverse, they shift by θ°, so ignition positions fi8a, 8
At b, the power distribution rotor is at the position indicated by the broken line 15b, for example.
このずれ角θ°が大きくなりすぎると、配電ロータ１５
ａは両端に配電部を有するため、キャンプ電極Ｌ４ａ、
１４ｂと配電ロータ１５ｂとのキャップＬｌ、Ｌ２の関
係がＬｌ＞Ｌ２となり、前気筒のキャップ電極１４ｂへ
点火される。この時前気筒は回転継続可能な位置である
ため逆回転が継続するという欠点がある。If this deviation angle θ° becomes too large, the distribution rotor 15
Since a has power distribution parts at both ends, camp electrode L4a,
The relationship between the cap Ll and L2 between the power distribution rotor 14b and the power distribution rotor 15b is Ll>L2, and the cap electrode 14b of the front cylinder is ignited. At this time, since the front cylinder is in a position where it can continue to rotate, there is a drawback that the reverse rotation continues.
本発明は上記の欠点を解消するため、シグナルロータの
外周面の一部に微少な段差を設けることにより、電磁ピ
ックアップの出力波形に凸部を設け、この凸部により機
関逆転時の点火位置を規制して、機関の逆転の継続を確
実に防止することを目的とする。In order to solve the above-mentioned drawbacks, the present invention provides a convex part in the output waveform of the electromagnetic pickup by providing a slight step on a part of the outer peripheral surface of the signal rotor, and this convex part allows the ignition position to be adjusted when the engine is reversed. The purpose is to regulate and ensure that the continuation of institutional reversals is prevented.
以下本発明を図に示す実施例について説明する。The present invention will be described below with reference to embodiments shown in the drawings.
第３図は本発明の要部構成であるシグナルロータ２の要
部拡大正面図であり、その外周面の各四部２ａ間のほぼ
中間位置に微少な段差９ （約０．１闘、ただし、シグ
ナルロータ２の外径が約３９＋ｎ＋の場合）が設けであ
る。これにより、電磁ピックアップ４には第４図に示す
様な出力波形が得られる。FIG. 3 is an enlarged front view of the main part of the signal rotor 2, which is the main part of the present invention, and there is a slight step 9 (approximately 0.1 mm, but If the outer diameter of the signal rotor 2 is approximately 39+n+), this is the case. As a result, the electromagnetic pickup 4 obtains an output waveform as shown in FIG.
この第４図において、１０も才機関正転時の出力波形で
１２がその時の点火位置であり、１ｌａ１１１ｂは機関
逆転時の高速時と低速時の出力波形であり、１３ａ、１
３ｂがその時の点火位置である。In this Fig. 4, 10 is also the output waveform when the engine rotates forward, 12 is the ignition position at that time, 1la111b is the output waveform at high speed and low speed when the engine is reversed, 13a, 1
3b is the ignition position at that time.
また、θ２，０２′は正転時と逆転時（高速時、低速時
）との点火位置のずれ角、Ｌは点火増幅器のスレッシェ
ホールドレベルである。Further, θ2,02' is the deviation angle of the ignition position between normal rotation and reverse rotation (high speed, low speed), and L is the threshold level of the ignition amplifier.
また、回ｒｔ８構成は第６図に示す通りで、２１は電磁
ピックアップ４の出力を増幅して矩形波出力を発生する
点火増幅器、２２は点火増幅器２１の出力信号を受けて
点火コイル２３の１次電流を断続するパワートランジス
タ、２４は点火配電器、２５は点火プラグで、この回路
構成は従来のものと同一のものでよい。The circuit rt8 configuration is as shown in FIG. The circuit configuration may be the same as a conventional one, including a power transistor for intermittent current, 24 an ignition distributor, and 25 a spark plug.
以上の構成により、電磁ピックアップ４の出力波形に第
４図に示すごとく凸部１６ができるため、低速時でも点
火位Ｗ１３ｂは、はとんど変化しない。よって、第５図
において常にＬｌ＜Ｌ２となり逆回転の断続防止ができ
る。With the above configuration, the output waveform of the electromagnetic pickup 4 has a convex portion 16 as shown in FIG. 4, so that the ignition position W13b hardly changes even at low speeds. Therefore, in FIG. 5, Ll<L2 always holds, and intermittent reverse rotation can be prevented.
以上述べたように本発明においては、シグナルロータの
外周面の一部に微少な段差を設けることにより電磁ピッ
クアップの出力波形に凸部を設け、この凸部により機関
逆転時の点火位置を規制するから、機関の逆転の断続を
低速から高速まで確実に防止することができるという優
れた効果がある。As described above, in the present invention, a convex part is provided in the output waveform of the electromagnetic pickup by providing a small step on a part of the outer peripheral surface of the signal rotor, and this convex part regulates the ignition position when the engine is reversed. This has the excellent effect of reliably preventing intermittent reversal of the engine from low to high speeds.
第１図は従来装置における要部構成を示す平面図、第２
図は従来装置における電磁ピックアップの出力波形図、
第３図は本発明装置の一実施例におけるシグナルロータ
の要部拡大正面図、第４図は本発明装置における電磁ピ
ックアップの出力波形図、ＷＩＪ５図は従来および本発
明装置に用いる点火配電器の模式平面図、第６図は本発
明装置における回路構成の一実施例を示す電気回路図で
ある。
２・・・シグナルロータ、２ａ・・・凹部、４・・・電
磁ビックアンプ、９・・・段差。
代理人弁理士 岡 部 隆Figure 1 is a plan view showing the main structure of a conventional device;
The figure shows the output waveform diagram of an electromagnetic pickup in a conventional device.
Fig. 3 is an enlarged front view of the main part of the signal rotor in one embodiment of the device of the present invention, Fig. 4 is an output waveform diagram of the electromagnetic pickup in the device of the present invention, and Fig. WIJ5 shows the ignition distributor used in the conventional and inventive devices. The schematic plan view and FIG. 6 are electric circuit diagrams showing one embodiment of the circuit configuration in the device of the present invention. 2... Signal rotor, 2a... Concave portion, 4... Electromagnetic big amplifier, 9... Step. Representative Patent Attorney Takashi Okabe
Claims (1)
クアップに出力される波形を利用して正逆回転時の点火
位置をずらして機関の逆回転防止を行なうものにおいて
、前記シグナルロータの外周面の一部に微少な段差を設
けることにより、前記ピックアップの出力波形に凸部を
付け、この凸部により機関逆回転時の点火位置を規制す
る２サイクル内燃機関川無接点点火装置。In an engine that prevents reverse rotation of the engine by shifting the ignition position during forward and reverse rotation using a waveform output to an electromagnetic pickup due to the rotation of a signal rotor having a concave portion on its outer circumference, a part of the outer circumferential surface of the signal rotor. A non-contact ignition system for a two-stroke internal combustion engine, in which a convex part is added to the output waveform of the pickup by providing a minute difference in the height, and the convex part regulates the ignition position when the engine rotates in reverse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13304583A JPH0246791B2 (en) | 1983-07-21 | 1983-07-21 | 2SAIKURUNAINENKIKANYOMUSETSUTENTENKASOCHI |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13304583A JPH0246791B2 (en) | 1983-07-21 | 1983-07-21 | 2SAIKURUNAINENKIKANYOMUSETSUTENTENKASOCHI |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6026176A true JPS6026176A (en) | 1985-02-09 |
| JPH0246791B2 JPH0246791B2 (en) | 1990-10-17 |
Family
ID=15095517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13304583A Expired - Lifetime JPH0246791B2 (en) | 1983-07-21 | 1983-07-21 | 2SAIKURUNAINENKIKANYOMUSETSUTENTENKASOCHI |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0246791B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102576812B1 (en) * | 2023-03-03 | 2023-09-07 | 신성한 | Exterior wall finishing device with waterproof, insulation and earthquake resistance |
-
1983
- 1983-07-21 JP JP13304583A patent/JPH0246791B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102576812B1 (en) * | 2023-03-03 | 2023-09-07 | 신성한 | Exterior wall finishing device with waterproof, insulation and earthquake resistance |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0246791B2 (en) | 1990-10-17 |
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