JPS59194080A - Firing signal extraction method and system - Google Patents
Firing signal extraction method and systemInfo
- Publication number
- JPS59194080A JPS59194080A JP6863983A JP6863983A JPS59194080A JP S59194080 A JPS59194080 A JP S59194080A JP 6863983 A JP6863983 A JP 6863983A JP 6863983 A JP6863983 A JP 6863983A JP S59194080 A JPS59194080 A JP S59194080A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- rectangular wave
- output
- ignition
- time
- 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
- F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
- F02P17/02—Checking or adjusting ignition timing
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点火信号検出器の出力中のノイズ成分を除去
して点火時期に対応した信号を抽出する方法および装置
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for removing noise components in the output of two ignition signal detectors and extracting a signal corresponding to ignition timing.
内燃機関の点火信号は、その回転数２点火進角等の計測
に利用されるが２点火信号検出器（筒内圧センサ、点火
電流センサ等）の出力そのままでは、その波形が回転数
や点火系の種類により異なるこさ、またノイズも大きい
ことがら何吟かの処理を行って出力中から点火時期に対
応した信号を抽出することが必要となる。The ignition signal of an internal combustion engine is used to measure its rotation speed, ignition advance angle, etc. However, if the output from the 2 ignition signal detectors (in-cylinder pressure sensor, ignition current sensor, etc.) is as it is, the waveform will not reflect the rotation speed or ignition system. Since the noise varies depending on the type of ignition and the noise is large, it is necessary to perform some processing to extract a signal corresponding to the ignition timing from the output.
この種の抽出法としては２例えば、シュミット回路を用
い、そのヒステリシス幅を犬にしてノイズ成分を除去し
たり、あるいはローパスフィルタを用いて出力波形をな
まらせる方法等が公知である。しかし２点火信号検出器
の出力波形は、第２図に記号■で示すように、様々な交
流成分が重畳しており、前者ではその振幅とヒスプリシ
ス幅との兼ね合いが雛しく２例えば。Two known extraction methods of this type include, for example, using a Schmitt circuit and adjusting its hysteresis width to remove noise components, or using a low-pass filter to blunt the output waveform. However, the output waveform of the two ignition signal detectors has various alternating current components superimposed on each other, as shown by the symbol ■ in FIG.
ノイズを除去するためにヒステリシス幅を犬にしておく
と、出力波形が小になった場合、信号が取出せなくなる
問題点がある。また、フィルタを介した場合には１時間
遅れ吉同時に、信号も小さくなってしまう問題がある。If the hysteresis width is set to 1/2 to remove noise, there is a problem that the signal cannot be extracted when the output waveform becomes small. In addition, when the signal is passed through a filter, there is a problem that the signal is delayed by one hour and the signal becomes small at the same time.
さて２点火信号検出器の出力を検討するのに。Now let's examine the output of the two ignition signal detectors.
一般に点火時には比較的大きな出力が発生し。Generally, a relatively large output is generated when igniting.
その後しばらく大小に変動した後、０才たは小さな一定
の値に収鋏する波形が、その点火ごとに繰返されている
。とすると、その出力を所定の限界レベル値と比較して
それを越えた際に。After that, the waveform fluctuates in size for a while and then converges to 0 or a small constant value, which is repeated every time the ignition occurs. Then, compare the output with a predetermined limit level value and when it exceeds it.
新らたな信号を立上らせ、その立下りまでの時間幅を前
期した検出器出力の変動時間幅より犬に選べばよく、こ
うすると２点火周期ごとに１個ずつの矩形波状信号が形
成され、その立上りは点火時期と一定の関係を有するこ
とになる。All you have to do is start a new signal, and choose the time width until its fall from the fluctuation time width of the previous detector output. In this way, one rectangular wave signal will be generated every two ignition cycles. The rise of the ignition timing has a certain relationship with the ignition timing.
しかしながら、この方法では、突発的に混入するノイズ
や多気筒機関においては、他の気筒から混入するノイズ
による影響を受ける問題が残る。すなわち、ノイズの混
入位置は２点火周期全域にわたり、また、その振幅も点
火信号の振幅より大になることもあり、これにより矩形
波状信号が立上ってしまうからである。However, with this method, there remains the problem of sudden noise entering the engine and, in a multi-cylinder engine, being affected by noise entering from other cylinders. That is, the position of the noise is over the entire two ignition cycles, and the amplitude thereof may also be larger than the amplitude of the ignition signal, causing a rectangular wave signal to rise.
ところで、この種のノイズを検討するのに。By the way, considering this kind of noise.
他の気筒から混入する成分は、その気筒の点火時の急峻
なパルス状のものであり、また、突発的に混入するノイ
ズも急峻なパルス状のものがほとんどである。ともすれ
ば２点火信号検出器の出力中の大小に変動している成分
の時間幅も比較すればよいことになる。Components mixed in from other cylinders are in the form of steep pulses when that cylinder is ignited, and most of the noise that enters suddenly is in the form of steep pulses. In other words, it would be sufficient to compare the time widths of components whose magnitudes fluctuate in the outputs of the two ignition signal detectors.
本発明は、上記検討結果に基づき１点火周期ごとに正確
に点火時期に対応した点火信号を抽出する方法および装
置を提供することを目的とし２点火信号検出器の出力を
所定のレベル信号と比較し、出力かレベル信号を越える
間、第１の矩形波状信号を形成させ２次いで、ぞの第１
の矩形波状信号の発生時に立上らせ、比較的短かい一定
時間後に立下らせることにより第２の矩形波状信号を形
成させ、続いて、その第２の矩形波状信号の時間幅を第
１の矩形波状信号の時間幅と比較して時間幅の犬なる矩
形波状信号を抽出すると共に、その抽出した第２の矩形
波状信号により立上らせ、比較的長い一定時間後に立下
らせることにより第３の矩形波状信号を形成さぜるもの
であり、その結果、第２の矩形波状信号より時間幅の短
い第１の矩形波状信号が除かれ、検出器出力中の所定の
レベル値以上を所定の時間以上発生する成分のみが抽出
され。The present invention aims to provide a method and apparatus for extracting an ignition signal that accurately corresponds to the ignition timing for each ignition cycle based on the above study results, and compares the output of two ignition signal detectors with a predetermined level signal. Then, while the output exceeds the level signal, a first rectangular wave signal is formed.
A second rectangular wave signal is formed by rising when the rectangular wave signal is generated and falling after a relatively short fixed time, and then changing the time width of the second rectangular wave signal to a second rectangular wave signal. A rectangular wave signal having a time width that is longer than that of the first rectangular wave signal is extracted, and is caused to rise by the extracted second rectangular wave signal and fall after a relatively long fixed time. As a result, the first rectangular wave signal having a shorter time width than the second rectangular wave signal is removed, and the predetermined level value in the detector output is Only components that occur for a predetermined period of time or more are extracted.
続いて、それがひとまとめにされて第３の矩形波状信号
となる。It is then grouped together into a third rectangular wave signal.
さらに２本発明の詳細な説明すると、検出器の出力を所
定のレベル信号と比較し、出力がレベル信号を越える間
、信号を送出させることにより第１の矩形波状信号を形
成する。これにより、先ず低い振幅のノイズ成分の除去
が行われ。In further detail, the present invention compares the output of the detector with a predetermined level signal, and generates a first rectangular wave signal by transmitting a signal while the output exceeds the level signal. As a result, noise components with low amplitudes are first removed.
点火時直後の大きな成分とその後の大小に変動する成分
、さらには急峻なパルス状ノイズ成分の発生位置にそれ
ぞれ矩形波状信号が発生ずる。Rectangular wave signals are generated at the positions of a large component immediately after ignition, a component that fluctuates in size thereafter, and a steep pulse-like noise component.
これら各矩形波の時間幅は、長短種々であるが。The time width of each of these rectangular waves varies.
点火時期直後においては、出力が比較的大であるために
常にある値以上であり、逆に、パルス状ノイズに対する
時間幅は極めて微小であり。Immediately after the ignition timing, the output is relatively large and therefore always exceeds a certain value, and conversely, the time width for pulsed noise is extremely small.
他は２点火系の種類や回転数等に影響され、長短様々で
ある。そして、これらの矩形波は、検出器出力が点火時
に犬となり、その後のある時間内は大小に変動するため
に２点火直後のある時間内に集中的に存在することにな
り、その他はノイズの混入時に、前記の如く極めて微小
な時間幅の矩形波として存在することになる。次に、こ
の矩形波の時間幅の長短を比較するために、その比較基
準信号として、前記第１の矩形波で立上り、比較的短か
い一定時間経過後立下る第２の矩形波を発生させる。こ
れにより第１の矩形波の発生ごとに、一定の時間幅の第
２の矩形波が発生させられたことになり、続いて両者を
比較して時間幅の長い第２の矩形波を取出すことにより
、第１の矩形波状信号中の微小な時間幅の矩形波によっ
て形成された第２の矩形波は除去され、結局これで点火
周期中の点火直後のある一定時間以外において混入した
ノイズの除去が行われる。そして２次には、この点火だ
比較的長い時間経過後に立下らせた第３の矩形波を形成
することにより、上記の残された第２の矩形波の群は、
一つの矩形波にまとめられ。Other factors vary depending on the type of 2-ignition system, rotation speed, etc. These rectangular waves are concentrated during a certain period of time immediately after the second ignition because the detector output becomes a dog at the time of ignition and fluctuates in size for a certain period of time after that, and the rest is due to noise. When it is mixed in, it exists as a rectangular wave with an extremely small time width as described above. Next, in order to compare the length of the time width of this rectangular wave, a second rectangular wave that rises at the first rectangular wave and falls after a relatively short fixed period of time is generated as a comparison reference signal. . As a result, a second rectangular wave with a fixed time width is generated every time the first rectangular wave is generated, and the two are then compared to extract the second rectangular wave with a longer time width. As a result, the second rectangular wave formed by the rectangular wave with a small time width in the first rectangular wave signal is removed, and in the end, this removes noise mixed in other than a certain period of time immediately after ignition during the ignition cycle. will be held. Then, in the secondary stage, by forming a third rectangular wave that falls after a relatively long time has elapsed from this ignition, the group of the remaining second rectangular waves is
combined into one square wave.
結局、これで２点火時期ごとに発生する信号が抽出され
る。After all, this extracts the signal that occurs every two ignition timings.
次に、上記抽出方法を実施するための抽出装置の実施例
を詳細に説明する。Next, an example of an extraction device for carrying out the above extraction method will be described in detail.
第１図において、１は点火検出器の出力端と結線された
入力端子であり、比較・整形回路１０の加算器３０の正
入力端子と結線されている。その比較器３０の負入力端
子はレベル信号発生器２０の出力端子と結線され、比較
器３０の出力端子は。In FIG. 1, reference numeral 1 denotes an input terminal connected to the output end of the ignition detector, and connected to the positive input terminal of the adder 30 of the comparison/shaping circuit 10. The negative input terminal of the comparator 30 is connected to the output terminal of the level signal generator 20, and the output terminal of the comparator 30 is connected to the output terminal of the level signal generator 20.
波形整形器４０の入力端と結線されている。そして、上
記比較・整形回路１０の波形整形器の出力端子は、第１
．第２の単安定マルチバイブレーク５０．６０のクロッ
ク信号入力端子、ケート信号入力端子とそれぞれ結線さ
れ、その第１の単安定マルチバイブレークの出力端子が
第２の単安定マルチバイブレーク６０のクロック信号入
力端子と結線され、第２の単安定マルチバイブレーク６
０の出力は、その出力端２から取出されるようになって
いる。It is connected to the input end of the waveform shaper 40. The output terminal of the waveform shaper of the comparison/shaping circuit 10 is connected to the first
．． The output terminal of the first monostable multi-bi break is connected to the clock signal input terminal and the gate signal input terminal of the second monostable multi-bi break 50 and 60, respectively, and the output terminal of the first monostable multi-bi break 60 is connected to the clock signal input terminal of the second monostable multi-bi break 60. connected to the second monostable multi-by-break 6
The output of 0 is taken out from the output end 2.
以上のものにおいては、入力端子１に第２図■の如く２
点火時期に大きな振幅を有し、その後のある時間内では
大小に変動し２次いて０あるいは低レベルに収斂する点
火信号検出器の出力が入力され、レベル信号発生器２０
の直流レベル信号■と比較され、出力■がレベル信号■
より犬の間、すなわち、比較器３０の出力が正の間。In the above case, input terminal 1 has two terminals as shown in Figure 2 ■.
The output of the ignition signal detector, which has a large amplitude at the ignition timing, fluctuates in magnitude within a certain period of time, and then converges to 0 or a low level, is input to the level signal generator 20.
It is compared with the DC level signal ■, and the output ■ becomes the level signal ■
while the output of the comparator 30 is positive.
比較器３０から出力が波形整形器４０に送出され。An output from the comparator 30 is sent to a waveform shaper 40.
■に示すように矩形波状の信号に整形される。The signal is shaped into a rectangular waveform as shown in (2).
続いて、この矩形波状信号■は第１の単安定マルチバイ
ブレーク５０にクロック信号として入力され、そこに予
め設定された比戟的知かい時定数により前記矩形波状信
号■の谷矩形波Ａ、Ｂ。Subsequently, this rectangular wave signal (2) is input as a clock signal to the first monostable multi-bicycle break 50, where the trough rectangular waves A, B of the rectangular wave signal (2) are inputted using a preset relative time constant. .
・・か入力されるごとに短い一定の時間幅ｔ１の矩形波
状信号■を発生する。第２の単安定マルチバイブレーク
６０は、その矩形波信号■を前記の比較・整形回路１０
の矩形波状信号により制御されるゲートを介して入力し
、そこに予め設定された比較的長い時定数により前記矩
形波状信号■の最初に到来した矩形波Ｘの立下りにより
立上る長い一定の時間幅ｔ２の矩形波状信号■を発生す
る。したがって、先ず、出力■とレベル信号■の比較に
より低い振幅のノイズ成分が除去された矩形波状ノイズ
成分に基づく微小な時間幅の矩形波Ｂ、Ｄが除去される
ことにより急峻なパルス状のノイズが除かれ、最終的に
点火直後に大小に変動する成分が一つにまとめられる。. . . generates a rectangular wave signal (2) with a short constant time width t1 each time it is input. The second monostable multi-bi break 60 transfers the rectangular wave signal ■ to the comparison/shaping circuit 10.
is input through a gate controlled by a rectangular wave signal, and a relatively long time constant set in advance causes the rectangular wave signal to rise for a long period of time due to the fall of the first arriving rectangular wave X. A rectangular wave signal ■ having a width t2 is generated. Therefore, first, by comparing the output ■ and the level signal ■, the rectangular waves B and D with minute time widths based on the rectangular wave noise components from which the low amplitude noise components have been removed are removed, and the steep pulse-like noise is removed. is removed, and finally the components that fluctuate in size immediately after ignition are combined into one.
尚、上記実施例においてはレベル信号は予め設定した直
流レベル信号■としたが、第３図に示すように出力■を
ピーク電圧回路２ｏにも導入し、その所定の分電圧を取
出してレベル信号としてもよい。In the above embodiment, the level signal was a preset DC level signal ■, but as shown in FIG. You can also use it as
以上のとおりであり２本発明は２点火信号検出器の出力
の振幅に併ぜ、その発生時間幅も比較して点火時期信号
を抽出するので、正確な点火信号が得られる。As described above, the present invention extracts an ignition timing signal by comparing not only the amplitude of the output of the two ignition signal detectors but also the generation time width thereof, so that an accurate ignition signal can be obtained.
第１図は本発明の実施例を示すプロ、り線図。
第２図はその各部の波形図、第３図はレベル信号発生器
の他の実施例を示すブロック線図である。
１０：比較・整形部、２０゛レベル信号発生器。
５０．６０：単安定マルチバイブレーク出願人
株式会社小野測器
代表者小 野 義一部FIG. 1 is a professional line diagram showing an embodiment of the present invention. FIG. 2 is a waveform diagram of each part thereof, and FIG. 3 is a block diagram showing another embodiment of the level signal generator. 10: Comparison/shaping section, 20° level signal generator. 50.60: Monostable multi-bibreak applicant Yoshikazu Ono, representative of Ono Sokki Co., Ltd.
Claims (1)
、出力がレベル信号を越える間、第１の矩形波状信号を
形成させ２次いで、その第１の矩形波状信号の発生時に
立上らせ、比較的短かい一定時間後に立下らせることに
より第２の矩形波状信号を形成させ、続いて。 その第２の矩形波状信号の時間幅を第１の矩形波状信号
の時間幅と比較して時間幅の犬なる第２の矩形波状信号
を抽出すると共に、その抽出した第２の矩形波状信号に
より立上らせ、比較的長い一定時間後に立下らせること
により第３の矩形波状信号を形成するところの点火信号
の抽出方法。 ２ 点火信号検出器の出力と所定のレベル信・号が比較
信号として入力され、出力がレベル信号を越える間、矩
形波状信号を形成する比較・整形回路と、その第１の矩
形波状信号がクロック信号として入力されると共に１時
定数が比較的短かく設定された第１の単安定マルチバイ
ブレークと、その第１の単安定マルチバイブレータの出
力がクロック信号として、かつ前記比較・整形回路の矩
形波状出力がそのクロック信号のゲート信号として入力
されると共に１時定数が比較的長く設定された第２の単
安定マルチバイブレークとからなるところの点火信号の
抽出装置。[Claims] 1. Compare the output of the ignition signal detector with a predetermined level signal, form a first rectangular wave signal while the output exceeds the level signal, and 2. A second rectangular wave signal is formed by causing the signal to rise at the time of generation and fall after a relatively short fixed time, and then to form a second rectangular wave signal. The time width of the second rectangular wave signal is compared with the time width of the first rectangular wave signal to extract a second rectangular wave signal having the same time width. A method for extracting an ignition signal, in which a third rectangular wave signal is formed by rising the signal and allowing it to fall after a relatively long fixed period of time. 2. The output of the ignition signal detector and a predetermined level signal are input as comparison signals, and while the output exceeds the level signal, a comparison/shaping circuit that forms a rectangular wave signal and the first rectangular wave signal is clocked. A first monostable multivibrator is input as a signal and has a relatively short time constant, and the output of the first monostable multivibrator is input as a clock signal, and the rectangular waveform of the comparison/shaping circuit is input as a clock signal. An ignition signal extraction device comprising a second monostable multivib break whose output is input as a gate signal of the clock signal and whose one time constant is set relatively long.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6863983A JPS59194080A (en) | 1983-04-19 | 1983-04-19 | Firing signal extraction method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6863983A JPS59194080A (en) | 1983-04-19 | 1983-04-19 | Firing signal extraction method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59194080A true JPS59194080A (en) | 1984-11-02 |
| JPH0218431B2 JPH0218431B2 (en) | 1990-04-25 |
Family
ID=13379498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6863983A Granted JPS59194080A (en) | 1983-04-19 | 1983-04-19 | Firing signal extraction method and system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59194080A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02503814A (en) * | 1988-04-02 | 1990-11-08 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Method and device for combustion monitoring of spark ignition internal combustion engines |
| JPH04262070A (en) * | 1991-02-15 | 1992-09-17 | Mitsubishi Electric Corp | Combustion detecting device for internal combustion engine |
| JP2016056746A (en) * | 2014-09-10 | 2016-04-21 | 日本特殊陶業株式会社 | Ignition timing control device and ignition timing control system |
-
1983
- 1983-04-19 JP JP6863983A patent/JPS59194080A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02503814A (en) * | 1988-04-02 | 1990-11-08 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Method and device for combustion monitoring of spark ignition internal combustion engines |
| JPH04262070A (en) * | 1991-02-15 | 1992-09-17 | Mitsubishi Electric Corp | Combustion detecting device for internal combustion engine |
| JP2016056746A (en) * | 2014-09-10 | 2016-04-21 | 日本特殊陶業株式会社 | Ignition timing control device and ignition timing control system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0218431B2 (en) | 1990-04-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3474810B2 (en) | Device for detecting combustion state of internal combustion engine | |
| JPS54116525A (en) | Ignition timing device for internal combustion engine | |
| ES445785A1 (en) | Constant energy electronic ignition system | |
| JPH0380983B2 (en) | ||
| ES480481A1 (en) | Ignition dwell circuit for an internal combustion engine | |
| US4667637A (en) | Gated knock detector for internal-combustion engines | |
| JPS56115855A (en) | Method and apparatus for controlling ignition timing of engine | |
| US4424706A (en) | Engine with knock sensing using product component of knock vibration signal | |
| JPS59194080A (en) | Firing signal extraction method and system | |
| JPS6368774A (en) | Spark plug preignition detector for internal combustion engine | |
| JPH0617818B2 (en) | Notking signal evaluation device | |
| JPS56141060A (en) | Signal generator for noncontact ignition device of internal combustion engine | |
| USRE32667E (en) | Gated knock detector for internal-combustion engines | |
| JPS5815620B2 (en) | Diesel engine injection start detection method and device | |
| JPS5591765A (en) | Ignition timing control device for internal combustion engine | |
| EP0147678A3 (en) | Multiple spark electronic ignition system | |
| JPH01178773A (en) | Knocking detection method for gasoline engine | |
| JPS56146064A (en) | Ignition signal generating apparatus for contactless ignition device of internal combustion engine | |
| JPS5798835A (en) | Knocking detecting device for internal combustion engine | |
| JP2705188B2 (en) | Cylinder discriminator for internal combustion engines | |
| JPS5764127A (en) | Loose parts monitor | |
| JPS5732060A (en) | Ignition timing controller for igniter in internal combustion engine | |
| JPS57203864A (en) | Controlling device for knocking | |
| JPS57110728A (en) | Fuel controller for internal combustion engine | |
| FR2422046A1 (en) | Ignition timing device for IC engine - uses engine and sparking pulses and derives extra pulses with equal repetition frequency or harmonic from comparator |