JPH0476249A - Knocking detecting device and ignition timing correcting device for internal combustion engine - Google Patents
Knocking detecting device and ignition timing correcting device for internal combustion engineInfo
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- JPH0476249A JPH0476249A JP18521590A JP18521590A JPH0476249A JP H0476249 A JPH0476249 A JP H0476249A JP 18521590 A JP18521590 A JP 18521590A JP 18521590 A JP18521590 A JP 18521590A JP H0476249 A JPH0476249 A JP H0476249A
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- 238000002485 combustion reaction Methods 0.000 title claims description 18
- 238000001514 detection method Methods 0.000 claims abstract description 56
- 238000012937 correction Methods 0.000 claims description 40
- 230000000979 retarding effect Effects 0.000 claims 1
- 230000001186 cumulative effect Effects 0.000 description 16
- 230000002238 attenuated effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000010354 integration Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004043 responsiveness Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Electrical Control Of Ignition Timing (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は内燃機関のノッキング検出装置及び点火時期補
正装置に関し、詳しくは、機関振動の検出信号からノッ
キング発生を精度良く検出し得るノッキング検出装置及
び該装置を用いた点火時期補正装置に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a knocking detection device and an ignition timing correction device for an internal combustion engine, and more specifically, to a knocking detection device that can accurately detect the occurrence of knocking from an engine vibration detection signal. and an ignition timing correction device using the device.
〈従来の技術〉
内燃機関において、所定レベル以上のノッキングか発生
すると、出力を低下させるのみならず、衝撃により吸・
排気バルブやピストンに悪影響を及はすため、ノッキン
グを検出して点火時期を補正することにより速やかにノ
ッキングを回避するようにした点火時期制御装置を備え
ているものかある（特開昭５８−１０５０３６号公報等
参照）。<Prior art> When knocking occurs above a predetermined level in an internal combustion engine, it not only reduces the output but also causes suction and
Some models are equipped with an ignition timing control device that detects knocking and corrects the ignition timing to quickly avoid knocking, since it has an adverse effect on exhaust valves and pistons. (See Publication No. 105036, etc.).
かかるノッキング発生による点火時期補正のためのノッ
キング検出は以下のようにして行っていた。Knocking detection for correcting the ignition timing due to the occurrence of knocking has been performed as follows.
即ち、第８図に示すように、圧電素子によって振動レベ
ルに応じた検出信号を出力するノックセンサ１１を機関
１２のシリンダブロック等に取付け、このノックセンサ
１１からの検出信号をバンドパスフィルタ１３に入力さ
せてノッキング特有の中心周波数付近の信号のみを通過
させ、半波整流を行った後、積分器１４で所定の積分区
間（例えばＡＴＤＣＩＯ°〜６０°）だけ積分し、かか
る積分器１４における積分値のピーク値（積分区間にお
ける特定周波数成分強度の累積）をＡ／Ｄ変換田１５て
Ａ／Ｄ変換してマイクロコンピュータ１６に入力させる
。That is, as shown in FIG. 8, a knock sensor 11 that outputs a detection signal according to the vibration level using a piezoelectric element is attached to the cylinder block of the engine 12, etc., and the detection signal from this knock sensor 11 is sent to a bandpass filter 13. After inputting the signal and passing only the signal near the center frequency peculiar to knocking and performing half-wave rectification, the integrator 14 integrates over a predetermined integration interval (for example, ATDCIO° to 60°). The peak value (accumulation of specific frequency component intensity in the integration interval) is A/D converted by the A/D converter 15 and inputted to the microcomputer 16.
マイクロコンピュータ１６では、ノッキング発生時にお
ける前記積分値のピークと、ノッキング非発生時におけ
る積分値のピークとの差に基づいて、ノッキングか発生
しているか否かを判別する。The microcomputer 16 determines whether or not knocking is occurring based on the difference between the peak of the integral value when knocking occurs and the peak of the integral value when knocking does not occur.
〈発明か解決しようとする課題〉
ところで、上記のようにノッキング発生を、積分値のピ
ークレベルで判別する構成では、ノッキング発生の有無
による積分値のピークレベルの差が充分にあることが望
ましいが、実際には、機関の形状やノックセンサの取付
位置によって特に信号レベルの小さい領域で前記差を充
分に確保することができない場合かあり、この場合ノッ
キング発生の有無によって積分値のピークレベルに明確
な差異が発生しないために、ノッキングを誤検出してし
まうことかあった。<Problem to be Solved by the Invention> Incidentally, in the configuration as described above in which the occurrence of knocking is determined based on the peak level of the integral value, it is desirable that there be a sufficient difference in the peak level of the integral value depending on whether or not knocking has occurred. In reality, depending on the shape of the engine and the mounting position of the knock sensor, it may not be possible to sufficiently secure the above-mentioned difference, especially in areas where the signal level is small. Because there was no significant difference, knocking could be falsely detected.
また、従来は、前記積分値に基づいてノッキング有無の
判定かオン・オフ的に行われていたために、ノッキング
の強弱とは関係無く一定角度ずつ点火時期を進・遅角補
正するようにしているため、ノッキングを応答性良く回
避しつつ過剰な補正を回避することか困難であった。Furthermore, conventionally, the presence or absence of knocking was determined based on the integral value, and therefore the ignition timing was advanced or retarded by a fixed angle, regardless of the strength of the knocking. Therefore, it has been difficult to avoid excessive correction while avoiding knocking with good responsiveness.
本発明は上記問題点に鑑みなされたものであり、ノッキ
ングセンサからの信号レベルが小さい場合あっても、ノ
ッキングを精度良く検出でき、然も、ノッキング強度の
判定か行えて、点火時期補正か適性に行われるようにす
ることを目的とする。The present invention was made in view of the above problems, and it is possible to detect knocking with high accuracy even when the signal level from the knocking sensor is small, and it is also possible to judge the knocking intensity and determine whether the ignition timing is corrected or not. The purpose is to ensure that the
〈課題を解決するための手段〉
そのため本発明にかかる内燃機関のノッキング検出装置
は第１図に示すように構成される。<Means for Solving the Problems> Therefore, a knocking detection device for an internal combustion engine according to the present invention is configured as shown in FIG.
第１図において、振動センサは、機関本体に付設されて
機関振動を検出する。強度検出手段は、前記振動センサ
の検出信号の特定周波数成分の強度を検出し、一方、強
度変化検出手段は特定周波数成分の強度変化のパターン
を検出する。In FIG. 1, a vibration sensor is attached to an engine body to detect engine vibration. The intensity detection means detects the intensity of a specific frequency component of the detection signal of the vibration sensor, and the intensity change detection means detects a pattern of intensity changes of the specific frequency component.
そして、ノッキング判別手段は、前述のように検出され
る振動センサの特定周波数成分の強度及び強度変化のパ
ターンに基づいてノッキング発生を判別する。Then, the knocking determining means determines whether knocking has occurred based on the intensity of the specific frequency component of the vibration sensor detected as described above and the pattern of intensity change.
ここで、強度検出手段及び強度変化検出手段が、複数種
の特定周波数成分についてそれぞれに強度及び強度変化
のパターンを検出するよう構成することかできる。Here, the intensity detecting means and the intensity change detecting means may be configured to detect the intensity and intensity change pattern for each of a plurality of types of specific frequency components.
上記のように構成される本発明にかかるノッキング検出
装置を用いた本発明にかかる点火時期補正装置において
、点火時期補正手段は、ノッキング判別手段によるノッ
キング発生の判別結果に基づいて内燃機関の点火時期を
進・遅角補正する。In the ignition timing correction device according to the present invention using the knocking detection device according to the present invention configured as described above, the ignition timing correction means adjusts the ignition timing of the internal combustion engine based on the determination result of the occurrence of knocking by the knocking determination means. Corrects the lead/retard angle.
ところで、前記ノッキング判別手段を、第１図示の各手
段を含んで構成させることができる。By the way, the knocking determination means can be configured to include each of the means shown in the first diagram.
ここで、第１判別値設定手段は、強度検出手段で検出さ
れた強度と所定値とを比較することによってノッキング
発生に属する度合いを示す第１判別値を設定し、また、
第２判別値設定手段は、強度変化検出手段で検出された
強度変化のパターンと所定の規範変化特性とを比較する
ことによってノッキング発生に属する度合いを示す第２
判別値を設定する。Here, the first discrimination value setting means sets a first discrimination value indicating the degree to which knocking has occurred by comparing the intensity detected by the intensity detection means with a predetermined value, and
The second discriminant value setting means determines the degree to which knocking has occurred by comparing the intensity change pattern detected by the intensity change detection means with a predetermined standard change characteristic.
Set the judgment value.
そして、最終判別値設定手段は、第１判別値設定手段及
び第２判別値設定手段でそれぞれに設定された第１判別
値及び第２判別に基づいてノッキング発生に属する度合
いを示す最終判別値を設定する。The final discriminant value setting means determines a final discriminant value indicating the degree of occurrence of knocking based on the first discriminant value and the second discriminant respectively set by the first discriminant value setting means and the second discriminant value setting means. Set.
上記のように構成される本発明にかかるノッキング検出
装置におけるノッキング検出の結果を受け、点火時期を
補正する装置として、第１図に示す点火時期補正量設定
手段は、前記最終判別値設定手段て設定された最終判別
値に応じて点火時期の進・遅角補正量を可変設定し、判
別値レベルによる点火時期補正手段は、上記点火時期補
正量設定手段で設定された点火時期の進・遅角補正量に
基づいて点火時期を進・遅角補正する。As a device for correcting the ignition timing in response to the knocking detection result in the knocking detection device according to the present invention configured as described above, the ignition timing correction amount setting means shown in FIG. The ignition timing advance/retard correction amount is variably set according to the set final discrimination value, and the ignition timing correction means based on the discrimination value level adjusts the ignition timing advance/retardation set by the ignition timing correction amount setting means. The ignition timing is advanced or retarded based on the angle correction amount.
〈作用〉
かかる構成によると、振動センサの特定周波数成分の強
度の他に、特定周波数成分の強度変化のパターンをノッ
キング判別の情報として用いるようにしてあり、前記強
度変化のパターンは、検出信号の絶対レベルに関係しな
いので、強度のみに基づいてノッキング検出を行う場合
に比べ、たとえ検出信号レベルが全体的に低いときでも
ノッキング検出の精度を上げることか可能となり、かか
る検出結果に基づく点火時期の進・遅角補正か適切に行
われることになる。<Operation> According to this configuration, in addition to the intensity of the specific frequency component of the vibration sensor, the pattern of intensity change of the specific frequency component is used as information for knocking determination, and the pattern of intensity change is determined based on the intensity of the detection signal. Since it is not related to the absolute level, it is possible to improve the accuracy of knocking detection even when the overall detection signal level is low compared to the case where knocking detection is performed based only on intensity, and the ignition timing can be determined based on such detection results. Advance/retard angle correction will be performed appropriately.
更に、特定周波数成分の強度及び強度変化のパターンか
らそれぞれにノッキング発生に属する度合いを示す第１
判別値及び第２判別値を演算させ、これらを用い最終的
な判別値を設定させるようにすれば、ノッキング発生に
属する度合いに応じて点火時期補正量を増減させて点火
時期を補正することが可能となり、点火時期補正による
ノッキング回避制御の応答性や精度が一層改善される。Furthermore, the first frequency component, which indicates the degree to which knocking occurs, is determined based on the intensity of the specific frequency component and the pattern of intensity changes.
If the discriminant value and the second discriminant value are calculated and the final discriminant value is set using these, the ignition timing can be corrected by increasing or decreasing the ignition timing correction amount depending on the degree to which knocking occurs. This makes it possible to further improve the responsiveness and accuracy of knock avoidance control through ignition timing correction.
〈実施例〉 以下に本発明の詳細な説明する。<Example> The present invention will be explained in detail below.
一実施例を示す第２図において、図示しない内燃機関の
シリンダブロックに付設されたノックセンサ（振動セン
サ）１は、圧電素子を内蔵し、機関振動に応じた波形の
検出（電圧）信号を出力する。In FIG. 2 showing one embodiment, a knock sensor (vibration sensor) 1 attached to a cylinder block of an internal combustion engine (not shown) has a built-in piezoelectric element and outputs a waveform detection (voltage) signal according to engine vibration. do.
前記ノックセンサ１の検出信号（アナログ信号）は、Ａ
／Ｄ変換器２でＡ／Ｄ変換されてくし形フィルタ３に入
力される。The detection signal (analog signal) of the knock sensor 1 is A
The signal is A/D converted by the /D converter 2 and input to the comb filter 3.
前記くし形フィルタ３は、複数段の単位遅延素子からな
る遅延回路４と、この遅延回路４を迂回したデータから
遅延回路４の出力データを減算する加算器５とから構成
されており、このくし形フィルタ３には、ノックセンサ
１の検出信号から抽出したい周波数の数に対応する数の
共振器６ａ〜６ｅが並列接続された回路が縦接接続され
ている。The comb filter 3 is composed of a delay circuit 4 consisting of a plurality of stages of unit delay elements, and an adder 5 that subtracts the output data of the delay circuit 4 from the data that has bypassed the delay circuit 4. A circuit in which a number of resonators 6a to 6e corresponding to the number of frequencies to be extracted from the detection signal of the knock sensor 1 are connected in parallel is connected to the shaped filter 3 in tandem.
前記共振器６ａ〜６ｅは、相互に異なる周波数成分に共
振するようにしてあり、本実施例では、かかる共振周波
数を、ノッキング振動が顕著に表れるとされている周波
数域７ｋＨｚ〜９ｋＨｚに従って７ｋＨｚ、８ｋＨｚ、
９ｋＨ２，１０ｋＨｚ。The resonators 6a to 6e are configured to resonate at different frequency components, and in this embodiment, the resonant frequencies are set to 7kHz and 8kHz in accordance with the frequency range of 7kHz to 9kHz in which knocking vibrations are considered to be noticeable. ,
9kHz2, 10kHz.
１１ｋＨｚとしである。The frequency is 11kHz.
前記くし形フィルタ３において、遅延回路４をバイパス
させたデータから遅延回路４で遅延されたデータを減算
することによって、検出信号レベルを全体的に減衰させ
ると共に、特に遅延時間に対応する周波数を加算器５て
消し合わせて、周波数特性として所謂くし形となる結果
か得るようになっている。In the comb filter 3, by subtracting the data delayed by the delay circuit 4 from the data bypassed by the delay circuit 4, the detected signal level is attenuated as a whole, and in particular, the frequency corresponding to the delay time is added. 5, and a so-called comb-shaped result is obtained as a frequency characteristic.
これにより、加算器５て消し合わされる信号に基づいて
各共振器６ａ〜６ｅか共振し続けることを抑止でき、各
周波数成分の強度か逐次得られるものである。Thereby, it is possible to prevent each of the resonators 6a to 6e from continuing to resonate based on the signals canceled by the adder 5, and the intensity of each frequency component can be obtained sequentially.
尚、本実施例では、上記のようにくし形フィルタ３と共
振器６ａ〜６ｅとの構成によってノックセンサｌからの
信号から特定周波数成分を抽出するようにしたが、アナ
ログのバンドパスフィルターを必要とする周波数の数に
対応させて設け、各バンドパスフィルターの出力をＡ／
Ｄ変換してマイクロコンピュータ７に読み込ませるよう
にしても良い。In this embodiment, a specific frequency component is extracted from the signal from the knock sensor I by the configuration of the comb filter 3 and the resonators 6a to 6e as described above, but an analog bandpass filter is not required. The output of each bandpass filter is A/
The data may be converted into D and read into the microcomputer 7.
前記各共振器６ａ〜６ｅの出力、即ち、各周波数成分毎
の強度信号は、マイクロコンピュータ７に入力されるよ
うになっており、マイクロコンピュータ７は、クランク
角センサ８からの検出信号に基づいて検出される所定の
周波数分析区間において前記各共振器６ａ〜６ｅを介し
て入力されるノックセンサ１の特定周波数成分に基づき
、図示しない内燃機関におけるノッキング発生を検出す
る一方、該検出結果に基づいて点火装置９における点火
時期を補正制御する。The outputs of the resonators 6a to 6e, that is, the intensity signals for each frequency component, are input to a microcomputer 7. The occurrence of knocking in the internal combustion engine (not shown) is detected based on the specific frequency components of the knock sensor 1 that are input via the respective resonators 6a to 6e in the predetermined detected frequency analysis section, and based on the detection results. The ignition timing in the ignition device 9 is corrected and controlled.
かかるノッキング発生検出及びこれに伴う点火時期補正
手段の内容を、第３図のフローチャートに従って次に説
明する。尚、本実施例において、強度検出手段２強度変
化検出手段、ノッキング判別手段、第１判別値設定手段
、第２判別値設定手段、最終判別値設定手段１点火時期
補正手段１点火時期補正量設定手段２判別値レベルによ
る点火時期補正手段としての機能は、前記第３図のフロ
ーチャートに示すように前記マイクロコンピュータ７か
ソフトウェア的に備えている。The details of the detection of the occurrence of knocking and the ignition timing correction means associated therewith will be explained below with reference to the flowchart shown in FIG. In this embodiment, the strength detection means 2, the strength change detection means, the knocking discrimination means, the first discrimination value setting means, the second discrimination value setting means, the final discrimination value setting means 1, the ignition timing correction means 1, the ignition timing correction amount setting. The function of the means 2 as an ignition timing correction means based on the discrimination value level is provided by the microcomputer 7 in the form of software, as shown in the flowchart of FIG.
第３図のフローチャートに示すノッキング発生検出は、
所定の周波数分析区間において行われるものであり、前
記所定の周波数分析区間とは、例えば点火雑音を避けて
各気筒の燃焼振動をサンプリングできる区間であり、例
えば６気筒機関においてはＡ Ｔ Ｄ Ｃ１０’〜Ａ
Ｔ Ｄ Ｃ６００とし、クランク角センサ８からの検出
信号に基づいてかかる所定の周波数分析区間を検出する
。The knocking occurrence detection shown in the flowchart of Fig. 3 is as follows:
This is carried out in a predetermined frequency analysis section, and the predetermined frequency analysis section is, for example, a section in which combustion vibrations of each cylinder can be sampled while avoiding ignition noise. For example, in a 6-cylinder engine, A T D C10' ~A
TDC600, and the predetermined frequency analysis section is detected based on the detection signal from the crank angle sensor 8.
まず、周波数分析区間に入ったことか検出されると、各
共振器６ａ〜６ｅを介して入力される第５図に示すよう
な各周波数成分の強度ｄＢ（振幅）をそれぞれ初期値と
して記憶する（Ｓｌ）。First, when it is detected that the frequency analysis section has entered, the intensity dB (amplitude) of each frequency component as shown in FIG. 5 input through each resonator 6a to 6e is stored as an initial value. (Sl).
そして、各周波数成分毎に記憶された初期値がそれぞれ
変わらず、前記周波数分析区間において一定レベルの強
度が続くと仮定し、このときの前記強度の積分値の時間
軸変化を、共振器６ａ〜６ｅからの出力間隔（標本周期
）と前記初期値とに基づいて設定し、これをノッキング
非発生時における規範変化特性とする（Ｓ２）。Then, assuming that the initial values stored for each frequency component do not change and that the intensity continues at a constant level in the frequency analysis section, the time axis change of the integrated value of the intensity at this time is calculated from the resonators 6a to 6a. This is set based on the output interval (sampling period) from 6e and the initial value, and this is set as the standard change characteristic when knocking does not occur (S2).
次に、前記周波数分析区間において所定時間毎に入力さ
れることになる各周波数成分毎の強度を記憶し、各周波
数成分毎に強度の時間的推移（強度変化のパターン）を
検出する（第６図参照）。Next, the intensity of each frequency component that will be input at predetermined time intervals in the frequency analysis section is stored, and the temporal transition of intensity (pattern of intensity change) is detected for each frequency component (sixth (see figure).
そして、かかる検出に基づいて強度をそれぞれに時間軸
上に標本周期毎に積分し、周波数分析区間内における強
度変化のパターンか積分値の傾きとして観察されるよう
にする（Ｓ３）。Then, based on the detection, the intensity is integrated for each sample period on the time axis, so that the pattern of intensity change within the frequency analysis interval or the slope of the integrated value is observed (S3).
そして、前述のように強度か不変であると仮定して得た
各周波数成分毎の規範変化特性と、実際に検出された各
周波数成分毎の強度積分値の変化の特性とを比較し、両
者のズレ量を規範変化特性に対する増大側でプラス、減
少側でマイナスとして強度のサンプリング間隔毎に求め
て累積させ、該累積値Ｅが規範変化特性に対する実際の
変化のずれ量を表すようにする（Ｓ４）。Then, as mentioned above, the standard change characteristics for each frequency component obtained assuming that the intensity remains unchanged are compared with the characteristics of the change in the intensity integral value for each frequency component that are actually detected. The amount of deviation is determined at each intensity sampling interval as plus on the increasing side and negative on the decreasing side with respect to the standard change characteristic, and is accumulated, so that the cumulative value E represents the deviation amount of the actual change with respect to the standard change characteristic ( S4).
ここて、規範変化特性は、強度変化かないことを前提と
しているのでリニアに増大することになるが、これに対
し、実際の検出信号に基づいて得た強度積分値の変化パ
ターンか合致しない場合には、その周波数成分にノッキ
ング振動か含まれているために、一定の強度で安定して
いないものと推定されるが、実際の検出信号に基づく強
度積分値も前記規範変化特性と同様に略リニアに増大変
化する場合には、その周波数成分については機械振動の
みであると推定できる（第４図参照）。Here, the standard change characteristic assumes that there is no change in intensity, so it will increase linearly, but on the other hand, if the change pattern of the intensity integral value obtained based on the actual detection signal does not match, is estimated to be unstable at a constant intensity because its frequency component includes knocking vibration, but the intensity integral value based on the actual detection signal is also approximately linear like the reference change characteristic. If the frequency component increases and changes, it can be estimated that the frequency component is only mechanical vibration (see Fig. 4).
即ち、第４図に示すように、同じ周波数成分において、
ノッキング振動か含まれるときには、異常燃焼によるノ
ッキング振動が除々に減衰するから、前記周波数成分の
強度も最初は大きく除々に減衰して機械振動のみのレベ
ルに戻ることになり、逆にノッキング振動か含まれない
ときには、略−定の機械振動レベルで強度か推移するこ
とになる。That is, as shown in FIG. 4, in the same frequency component,
When knocking vibration is included, the knocking vibration due to abnormal combustion is gradually attenuated, so the intensity of the frequency component is initially greatly attenuated and gradually returns to the level of only mechanical vibration; conversely, when knocking vibration is included, When it is not possible, the intensity changes at a nearly constant mechanical vibration level.
このため、ノッキング振動か含まれないときには、分析
区間の初期の強度を略維持して、強度の積分値は略リニ
アに上昇することになる。Therefore, when knocking vibration is not included, the initial intensity of the analysis section is substantially maintained, and the integrated value of the intensity increases substantially linearly.
従って、前述のように、分析区間の初期の強度かその後
変化しないと仮定して、強度の積分値の時間軸変化を推
定すれば、この変化特性（所定の規範変化特性）は、ノ
ッキング非発生時のものとなり、ノッキングか発生して
いるときに、実際の強度を時間軸上で積分していくと、
第４図に示すように、前記ノッキング非発生時に対応す
るものとして推定した変化特性に合致しない変化パター
ンを示すことになり、ノッキング強度か大きいときほど
変化特性に大きな差異を示すことになる。Therefore, as mentioned above, if we assume that the initial intensity of the analysis interval does not change thereafter and estimate the time-axis change in the integrated value of the intensity, this change characteristic (predetermined standard change characteristic) will be determined to prevent knocking from occurring. When the actual strength is integrated on the time axis when knocking occurs,
As shown in FIG. 4, a change pattern is shown that does not match the change characteristics estimated as corresponding to the case where knocking does not occur, and the larger the knocking intensity, the larger the difference in the change characteristics.
このため、実際の強度の時間軸上での積分値を求めて前
記ノッキング非発生時のものと比較し、その差異を累積
することてノッキング強度か検出できるものである。Therefore, the knocking intensity can be detected by calculating the integral value of the actual intensity on the time axis, comparing it with the value when no knocking occurs, and accumulating the differences.
このように、特定周波数成分の強度変化パターンに基づ
いてノッキングを検出てきるから、信号レベルか小さい
ときてあっても識別か可能であり、また、機械振動か強
くなる高回転域であっても、容易にノッキング振動と機
械振動とを区別してノッキング検出を行えるものである
。In this way, knocking is detected based on the intensity change pattern of specific frequency components, so it can be identified even when the signal level is low, and even in the high rotation range where mechanical vibration is strong. Therefore, knocking can be detected by easily distinguishing between knocking vibration and mechanical vibration.
尚、周波数によっては、ノッキングの発生によって機関
振動レベルよりも強度が弱くなり、ノッキング振動の減
衰に伴って機関振動レベルに戻るような特性を示す周波
数域もあるが、この場合にも、前記ノッキング非発生時
の変化特性であるリニアな変化を示さないから、ノッキ
ングを検出できる。また、周波数分析区間の初期におけ
る強度を一定としてノッキング非発生時の変化特性を設
定するようにしたが、予めそれぞれの周波数成分毎にノ
ッキング振動を含んだ場合の強度変化（減少変化又は増
大変化）の特性を求めておいて、このノッキング発生時
に表れると予測される強度の変化特性と、実際の検出信
号から求めた各周波数成分毎の強度変化パターンとを比
較し、非ノ、ツキング度合いを示すことになる両者のず
れ量の累積を求めるようにしても良い。Depending on the frequency, there are frequency ranges that exhibit characteristics such that the intensity becomes weaker than the engine vibration level due to the occurrence of knocking, and returns to the engine vibration level as the knocking vibration is attenuated. Knocking can be detected because it does not show a linear change, which is the change characteristic when no knocking occurs. In addition, although the intensity at the beginning of the frequency analysis section was set as constant and the change characteristics when knocking did not occur were set, the intensity change (decreasing change or increasing change) when knocking vibration was included for each frequency component was set in advance. The characteristics of the knocking are calculated, and the intensity change characteristics predicted to appear when this knocking occurs are compared with the intensity change pattern for each frequency component obtained from the actual detection signal, and the degree of non-knocking and knocking is shown. It is also possible to calculate the cumulative amount of deviation between the two.
各共振器６ａ〜６ｅに対応する周波数成分毎に、周波数
分析区間における実強度変化の非ノツク時に対応する規
範変化特性に対するずれ量の累積値Ｅを上記のようにし
て求めると、各周波数成分毎に求めた累積値Ｅの絶対値
の総和、又は、平均値、更には、最大値などを求めて、
かかる各周波数別のずれ量累積値Ｅから最終的に設定さ
れたずれ量累積値Ｅの絶対値に基づいて、ノッキング発
生に属する度合いを示す第１判別値ｆ１を設定する（Ｓ
５）。For each frequency component corresponding to each resonator 6a to 6e, if the cumulative value E of the deviation amount from the reference change characteristic corresponding to the non-knock time of the actual intensity change in the frequency analysis interval is determined as described above, for each frequency component Find the sum of the absolute values of the cumulative value E found, or the average value, or the maximum value, etc.
Based on the absolute value of the cumulative deviation value E finally set from the cumulative deviation value E for each frequency, a first discrimination value f1 indicating the degree to which knocking has occurred is set (S
5).
前記ずれ量の累積値Ｅは、非ノツク時の特性に対するズ
レの大きさを示すから、一般的に累積値Ｅが大きいとき
ほどノッキング強度が大きいと推定され、逆に、累積値
Ｅが小さいときには、それたけ非ノツク時に近い変化特
性を周波数成分が示したことになるからノッキングか発
生−していない状態に近いものと推定される。The cumulative value E of the deviation amount indicates the size of the deviation from the non-knocking characteristics, so it is generally estimated that the larger the cumulative value E is, the greater the knocking intensity is. Conversely, when the cumulative value E is small, the knocking intensity is estimated to be larger. , since the frequency components showed change characteristics that are similar to the non-knocking state, it is estimated that the state is close to the state where no knocking occurs.
このため、前記累積値Ｅか小さいときほど前記第１判別
値ｆ１は小さく設定され、逆に、累積値Ｅか大きいとき
には第１判別値ｆ１か大きく設定されるようにしてあり
、この第１判別値ｆ１のレベルによって発生しているノ
ッキングの強度か判別できるようにしである。For this reason, the first discrimination value f1 is set smaller as the cumulative value E is smaller, and conversely, the first discrimination value f1 is set larger when the cumulative value E is larger. This allows the intensity of the knocking occurring to be determined based on the level of the value f1.
前記累積値Ｅを第１判別値ｆ１に変換する際には、単純
に累積値Ｅに比例して第１判別値ｆ１か増大するものと
しても良いが、実際には累積値Ｅとノッキング強度とは
比例しないので、前記累積値Ｅに対する実際のノッキン
グ強度を実験・経験的に予め求めておいて、累積値Ｅを
ノッキング強度という人間の主観的なあいまさに変換す
るメンバーシップ関数を設定し、所謂フィジイ集合によ
ってノッキング強度を表す第１判別値ｆ、（メンバーシ
ップ値）を設定させるようにすることが好ましい。When converting the cumulative value E into the first discriminant value f1, the first discriminant value f1 may be simply increased in proportion to the cumulative value E, but in reality, the cumulative value E and the knocking intensity are is not proportional, so the actual knocking strength with respect to the cumulative value E is experimentally and empirically determined in advance, and a membership function is set that converts the cumulative value E into the knocking strength, which is a human subjective interpretation. It is preferable that the first discriminant value f, (membership value) representing the knocking intensity is set using the Fiji set.
尚、上記のように所定の周波数分析区間における特定周
波数成分の強度変化に基づいてノッキング強度を示す第
１判別値ｆ、を設定させる場合には、ノッキング振動か
特に顕著に表れると見込まれる１つの周波数成分のみを
検出信号から抽出させて、この周波数成分の強度変化の
みから前記第１判別値ｆ１を設定させるようにしても良
い。In addition, when setting the first discriminant value f indicating the knocking intensity based on the intensity change of a specific frequency component in a predetermined frequency analysis interval as described above, one of the knocking vibrations that is expected to appear particularly Alternatively, only the frequency component may be extracted from the detection signal, and the first discrimination value f1 may be set based only on the intensity change of this frequency component.
かかる周波数分析区間内における各周波数成分の強度変
化パターンに基づいてノッキング強度を示す第１判別値
ｆ１を設定すると共に、同様にしてノッキング強度を示
すことになる第２判別値ｆ２を、各周波数成分の強度レ
ベルに基づいて設定する処理が並行して行われる。A first discrimination value f1 indicating the knocking intensity is set based on the intensity change pattern of each frequency component within the frequency analysis interval, and a second discrimination value f2 indicating the knocking intensity is similarly set for each frequency component. The process of setting based on the intensity level of is performed in parallel.
前記共振器６ａ〜６ｅからは、所定周期毎に第５図に示
すような周波数スペクトルか出力されることになるので
、周波数分析区間で得られたかかる周波数スペクトルを
逐次記憶させる（Ｓ６）。Since the resonators 6a to 6e output frequency spectra as shown in FIG. 5 at predetermined intervals, such frequency spectra obtained in the frequency analysis section are sequentially stored (S6).
そして、周波数分析区間内で求められた強度の各周波数
成分毎の積分値を第７図に示すように求め（Ｓ７）、各
周波数成分毎の強度積分値と、各周波数成分毎に演算さ
れているバックグラウンドレベルＢＧＬとを比較する（
Ｓ８）。Then, the integral value for each frequency component of the intensity determined within the frequency analysis interval is determined as shown in FIG. 7 (S7), and the intensity integral value for each frequency component and the integral value for each frequency component are calculated. Compare the background level BGL (
S8).
前記バックグラウンドレベルＢＧＬは、周波数分析区間
毎に求められる各周波数成分の強度積分値の加重平均値
であり、過去のデータに対する重み付けを重くして加重
平均されるようにしであると共に、ノッキング判別され
た強度積分値か加重平均されないようにしである。従っ
て、前記バックグラウンドレベルＢＧＬは、ノッキング
の非発生状態における機械振動のみを示す強度積分値の
レベルであると見做すことができ、このバックグラウン
ドレベルＢＧＬを今回の周波数分析区間で求めた強度積
分値か越えた場合には、ノッキング発生によるものと推
定される。The background level BGL is a weighted average value of the integrated intensity values of each frequency component obtained for each frequency analysis interval, and is weighted averaged with heavier weighting on past data, and is also used for knocking determination. This prevents the intensity integral values from being weighted averaged. Therefore, the background level BGL can be considered to be the level of the intensity integral value indicating only mechanical vibration in a state where knocking does not occur, and this background level BGL is the intensity value obtained in this frequency analysis interval. If the integral value is exceeded, it is presumed that knocking has occurred.
このため、各周波数成分毎に今回の周波数分析区間で求
めた強度積分値が、前記バックグラウンドレベルＢＧＬ
を越える量を求め、その総和、平均値、又は最大値に基
づいて、ノッキング発生に属する度合い、換言すれば、
ノッキング強度を示す第２判別値ｆ２を設定する（Ｓ９
）。Therefore, the intensity integral value obtained in the current frequency analysis interval for each frequency component is equal to the background level BGL.
Based on the sum, average value, or maximum value, determine the degree to which knocking occurs, in other words,
A second discrimination value f2 indicating the knocking intensity is set (S9
).
大きなノッキングか発生すると、それたけノッキング振
動が表れる周波数成分の強度が、ノッキングの非発生時
に比へて高くなって、バックグラウンドレベルＢＧＬを
大きく上回ることになるから、検出された強度積分値か
ＢＧＬを大きく上回っているときほど大きな第２判別値
ｆ２か設定されるようにしてあり、この第２判別値ｆ２
も第１判別値ｆ、と同様レベルに比較できるノッキング
強度を示す値となる。When large knocking occurs, the intensity of the frequency component in which knocking vibration appears becomes higher than when knocking does not occur, and greatly exceeds the background level BGL. Therefore, the detected intensity integral value or BGL The larger the second discriminant value f2 is set, the larger the second discriminant value f2 is.
Similarly to the first discrimination value f, the knocking intensity is a value that can be compared to the same level as the first discrimination value f.
尚、ここでも、１つの周波数成分の強度積分値のみを求
めて、この強度積分値と、該強度積分値を加重平均して
求められるバックグラウンドレベルＢＧＬとを比較して
前記第２判別値ｆ２を設定させることもてきる。更に、
前述のように第１判別値ｆ１をファジィ集合を用いて設
定させる場合には、上記第２判別値ｆ２についてもファ
ジィ集合を用いて設定させるようにする。Here, too, only the intensity integral value of one frequency component is determined, and this intensity integral value is compared with the background level BGL, which is determined by weighted averaging of the intensity integral values, to determine the second discriminant value f2. You can also set it. Furthermore,
When the first discriminant value f1 is set using a fuzzy set as described above, the second discriminant value f2 is also set using a fuzzy set.
このようにして設定された各判別値ｆ＋、ｆ２それぞれ
に基づいてノッキングが発生しているか否が、また、詳
しくは、ノッキング強度を検出することか可能であるが
、特に、ノッキング強度レベルに基づいて設定される第
２判別値ｆ２は、ノッキング発生気筒からノックセンサ
１まての距離か遠く信号レベルか低いときに精度良くノ
ッキング強度を示すことかできないため、上記の各判別
値ｆｉ、ｆ２を両方用いて最終的なノッキング強度を推
定することで、一方の検出結果のみに基づいてノッキン
グ判別する場合よりも検出精度を高めるようにする。It is possible to determine whether or not knocking has occurred based on each of the discriminant values f+ and f2 set in this way.More specifically, it is possible to detect the knocking intensity, but in particular, it is possible to detect the knocking intensity based on the knocking intensity level. The second discrimination value f2, which is set as follows, cannot accurately indicate the knocking intensity when the distance from the knocking cylinder to the knock sensor 1 is far and the signal level is low. By using both to estimate the final knocking intensity, detection accuracy is improved compared to when knocking is determined based on only one detection result.
上記各判別値ｆ４．ｆｘに基づく最終的なノッキング強
度の推定（最終的な判別値ｆの設定）は、例えば各判別
値ｆ、、ｆ２の加算値を求めたり、平均値を求めたり、
大小比較によって一方を選択したりすれば良く、このよ
うにして各判別値ｆｌ＋ｆ２から最終的に導き出される
判別値ｆに基づいて、ノッキング発生の有無だけではな
く高精度なノッキング強度の判定が行える。Each of the above discriminant values f4. Estimation of the final knocking intensity based on fx (setting of the final discriminant value f) can be performed, for example, by calculating the sum of the discriminant values f, , f2, calculating the average value,
One may be selected by comparing the magnitudes, and based on the discriminant value f finally derived from each discriminant value fl+f2, it is possible to determine not only the presence or absence of knocking but also the knocking intensity with high accuracy.
尚、ファジィ集合を用いてメンバーシップ値となる各判
別値ｆ、、ｆ２を設定させた場合には、各判別値ｆｌ、
ｆｚから最終的にノッキング発生に属する度合いを示す
判別値を設定させる際に、再びファジィ集合を用いても
良い。In addition, when each discriminant value f, , f2 which becomes a membership value is set using a fuzzy set, each discriminant value fl,
Fuzzy sets may be used again when ultimately setting a discriminant value indicating the degree to which knocking occurs based on fz.
上記のようにして、ノッキング強度を示す判別値ｆか最
終的に求められれば、そのときのノッキング強度に応じ
て点火時期を補正することか可能となるから、例えば第
３図のフローチャート中に示すように、判別値ｆか所定
以上であるときにはノッキング発生を判別し、判別値の
増大に応じて点火時期の遅角補正量を増大させ、また、
判別値ｆがはっきりしたノッキング発生を示していない
が非ノツキング時とも言えないようなレベルであるとき
には、点火時期の補正量をゼロとして点火時期の補正か
行われないようにし、更に、判別値ｆのレベルが充分に
小さく非ノツキング時と認められるときには、機関出力
を得るべく判別値ｆの値が小さくなるほど大きな進角補
正量が設定されるようにする（ Ｓ １０）。If the discriminant value f indicating the knocking intensity is finally determined as described above, it becomes possible to correct the ignition timing according to the knocking intensity at that time. As such, when the discrimination value f is equal to or greater than a predetermined value, it is determined that knocking has occurred, and the ignition timing retard correction amount is increased in accordance with the increase in the discrimination value.
When the discriminant value f does not clearly indicate the occurrence of knocking, but is at a level that cannot be said to be non-knocking, the ignition timing correction amount is set to zero so that no ignition timing correction is performed, and the discriminant value f When the level of is sufficiently small and it is recognized that it is a non-knocking time, the smaller the value of the discrimination value f is, the larger the advance angle correction amount is set in order to obtain the engine output (S10).
ここで、判別値ｆに基づいて例えば「ノッキング発生」
、「ノッキング発生の可能性有り」、「ノッキング非発
生」の３つ状態に分け、それぞれに状態に対応して点火
時期の進・遅各補正量か選択されるようにしても良い。Here, based on the discriminant value f, for example, "knocking has occurred".
, "Knocking may occur", and "Knocking does not occur", and the ignition timing advance/retard correction amount may be selected in accordance with each state.
また、各判別値ｆ、、ｆ２をファジィ集合を用いて設定
させたときには、各判別値ｆ、、ｆ２を点火時期補正量
にそれぞれ変換する非ファジィ化を行って、それぞれの
判別値ｆｌ＋ ｆ２から求められる点火時期補正量の
重心点を最終的な点火時期補正量として設定させること
もてきる。In addition, when each discriminant value f,, f2 is set using a fuzzy set, defuzzification is performed to convert each discriminant value f,, f2 into an ignition timing correction amount, and from each discriminant value fl + f2 The center of gravity of the required ignition timing correction amount may be set as the final ignition timing correction amount.
上記のようにして点火時期の補正量かノッキング強度レ
ベルに基づいて設定されると、マイクロコンピュータ７
は、予め運転条件に対応して記憶されている基本点火時
期を前記補正量に基づいて進・遅角補正し、該補正後の
点火時期に基づいて点火装置９に点火信号を出力し、補
正された点火時期に基づく点火処理を実行させる。ここ
で、ノックセンサ１の検出信号の特定周波数成分の強度
レベル及び強度変化パターンから、精度良くノッキング
強度が検出されており、ノッキング強度に応じて点火時
期補正量か設定されるから、精度の高いノッキング制御
か可能となり、速やかなノッキング回避と、ＭＢ Ｔ
（Ｍｉｎｉｍｕｍ ５ｐａｒｋ Ａｄｖａｎｃｅｆｏｒ
Ｂｅ５ｔＴｏｒｑｕｅ）付近での点火を確保できる。When the ignition timing is set based on the correction amount or the knocking intensity level as described above, the microcomputer 7
advances or retards the basic ignition timing stored in advance in accordance with the operating conditions based on the correction amount, outputs an ignition signal to the ignition device 9 based on the corrected ignition timing, and makes corrections. The ignition process is executed based on the ignition timing determined. Here, the knocking intensity is detected with high precision from the intensity level and intensity change pattern of the specific frequency component of the detection signal of the knock sensor 1, and the ignition timing correction amount is set according to the knocking intensity. Knocking control is now possible, allowing quick knocking avoidance and MBT
(Minimum 5park Advance for
It is possible to secure ignition near Be5tTorque).
尚、本実施例では、ノックセンサ１の検出信号から７ｋ
Ｈｚ、８ ｋＨｚ、９ ｋＨｚ、１０ｋＨｚ。In addition, in this embodiment, 7k is detected from the detection signal of the knock sensor 1.
Hz, 8 kHz, 9 kHz, 10 kHz.
１１ｋＨｚの５種類の周波数成分を抽出するようにした
が、抽出する周波数を限定するものではなく、周波数の
数を限定するものでもない。Although five types of frequency components of 11 kHz are extracted, this does not limit the frequencies to be extracted, nor does it limit the number of frequencies.
〈発明の効果〉
以上説明したように、本発明によると、振動センサから
の検出信号の特定周波数成分の強度及び強度変化パター
ンに基づいてノッキング発生を判別させることにより、
ノッキング検出の精度か向上するから、かかる検出結果
に基づいてノッキングを回避するための点火時期補正制
御を行わせることで、ノッキングを良好に回避でき、特
に、ノッキング発生に属する度合いを示す判別値を設定
させるようにすれば、そのときのノッキング強度に応じ
て点火時期の補正量を設定させることができ、より一層
ノッキング制陣が精度良く行えるという効果かある。<Effects of the Invention> As explained above, according to the present invention, occurrence of knocking is determined based on the intensity and intensity change pattern of a specific frequency component of a detection signal from a vibration sensor.
Since the accuracy of knocking detection is improved, knocking can be effectively avoided by performing ignition timing correction control to avoid knocking based on the detection result. If this setting is made, the amount of correction of the ignition timing can be set in accordance with the knocking intensity at that time, which has the effect of allowing even more accurate knocking control.
第１図は本発明の構成を示すブロック図、第２図は本発
明の一実施例を示すシステムブロック図、第３図は同上
実施例におけるノッキング検出及び点火時期補正の制御
内容を示すフローチャート、第４図は特定周波数の強度
変化パターンに基つくノッキング判別を説明するための
タイムチャート、第５図〜第７図はそれぞれ同上実施例
における特定周波数毎のデータの様子を示す線図、第８
図は従来のノッキング検出装置の一例を示すブロック図
である。
１・・・ノックセンサ（振動センサ） ２・・・Ａ
／Ｄ変換器 ３・・・くし形フィルタ ４・・・遅
延回路 ５・・・加算器 ６ａ〜６ｅ・・・共振器
７・・・マイクロコンピュータ ８・・・クランク角
センサ ９・・・点火装置
特許出願人 日本電子機器株式会社
代理人 弁理士 笹 島 富二雄FIG. 1 is a block diagram showing the configuration of the present invention, FIG. 2 is a system block diagram showing an embodiment of the present invention, and FIG. 3 is a flowchart showing control details of knocking detection and ignition timing correction in the above embodiment. FIG. 4 is a time chart for explaining knocking discrimination based on the intensity change pattern of a specific frequency, FIGS.
The figure is a block diagram showing an example of a conventional knocking detection device. 1...Knock sensor (vibration sensor) 2...A
/D converter 3... Comb filter 4... Delay circuit 5... Adder 6a to 6e... Resonator 7... Microcomputer 8... Crank angle sensor 9... Ignition device Patent applicant: Japan Electronics Co., Ltd. Agent: Fujio Sasashima
Claims (5)
ンサと、 該振動センサの検出信号の特定周波数成分の強度を検出
する強度検出手段と、 前記振動センサの検出信号の特定周波数成分の強度変化
のパターンを検出する強度変化検出手段と、 前記検出された特定周波数成分の強度及び強度変化のパ
ターンに基づいてノッキング発生を判別するノッキング
判別手段と、 を含んで構成された内燃機関のノッキング検出装置。(1) A vibration sensor attached to the engine body to detect engine vibration; an intensity detection means for detecting the intensity of a specific frequency component of the detection signal of the vibration sensor; and an intensity of the specific frequency component of the detection signal of the vibration sensor. Knocking detection for an internal combustion engine, comprising: an intensity change detection means for detecting a change pattern; and a knocking determination means for determining occurrence of knocking based on the detected intensity of the specific frequency component and the intensity change pattern. Device.
種の特定周波数成分についてそれぞれに強度及び強度変
化のパターンを検出するよう構成されたことを特徴とす
る請求項１記載の内燃機関のノッキング検出装置。(2) Knocking in an internal combustion engine according to claim 1, wherein the intensity detecting means and the intensity change detecting means are configured to detect respective intensities and intensity change patterns for a plurality of types of specific frequency components. Detection device.
ることによってノッキング発生に属する度合いを示す第
１判別値を設定する第１判別値設定手段と、 前記強度変化検出手段で検出された強度変化パターンと
所定の規範変化特性とを比較することによってノッキン
グ発生に属する度合いを示す第２判別値を設定する第２
判別値設定手段と、 前記第１判別値設定手段及び第２判別値設定手段でそれ
ぞれに設定された第１判別値及び第２判別に基づいてノ
ッキング発生に属する度合いを示す最終判別値を設定す
る最終判別値設定手段と、を含んで構成されることを特
徴とする請求項１又は２のいずれかに記載の内燃機関の
ノッキング検出装置。(3) first discrimination value setting means, wherein the knocking discrimination means sets a first discrimination value indicating the degree to which knocking has occurred by comparing the intensity detected by the intensity detection means with a predetermined value; a second discriminant value that indicates the degree to which knocking has occurred by comparing the intensity change pattern detected by the intensity change detection means with a predetermined standard change characteristic;
a discriminant value setting means; and a final discriminant value indicating the degree of occurrence of knocking based on the first discriminant value and the second discriminant respectively set by the first discriminant value setting means and the second discriminant value setting means. 3. The knocking detection device for an internal combustion engine according to claim 1, further comprising: final discrimination value setting means.
ッキング検出装置におけるノッキング判別手段によるノ
ッキング発生の判別結果に基づいて内燃機関の点火時期
を進・遅角補正する点火時期補正手段を含んで構成され
たことを特徴とする内燃機関の点火時期補正装置。(4) An ignition timing correction means for advancing or retarding the ignition timing of the internal combustion engine based on the determination result of the occurrence of knocking by the knocking determination means in the knocking detection device for an internal combustion engine according to claim 1 or 2. An ignition timing correction device for an internal combustion engine, comprising:
おける最終判別値設定手段で設定された最終判別値に応
じて点火時期の進・遅角補正量を可変設定する点火時期
補正量設定手段と、 該点火時期補正量設定手段で設定された点火時期の進・
遅補正量に基づいて内燃機関の点火時期を進・遅角補正
する判別値レベルによる点火時期補正手段と、 を含んで構成されたことを特徴とする内燃機関の点火時
期補正装置。(5) Ignition timing correction amount setting means for variably setting the ignition timing advance/retard correction amount according to the final discrimination value set by the final discrimination value setting means in the knocking detection device for an internal combustion engine according to claim 3; , the ignition timing advance/adjustment set by the ignition timing correction amount setting means;
An ignition timing correction device for an internal combustion engine, comprising: ignition timing correction means based on a discrimination value level that advances or retards the ignition timing of the internal combustion engine based on the retardation correction amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18521590A JPH0819890B2 (en) | 1990-07-16 | 1990-07-16 | Knocking detection device and ignition timing correction device for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18521590A JPH0819890B2 (en) | 1990-07-16 | 1990-07-16 | Knocking detection device and ignition timing correction device for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0476249A true JPH0476249A (en) | 1992-03-11 |
| JPH0819890B2 JPH0819890B2 (en) | 1996-03-04 |
Family
ID=16166891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18521590A Expired - Fee Related JPH0819890B2 (en) | 1990-07-16 | 1990-07-16 | Knocking detection device and ignition timing correction device for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0819890B2 (en) |
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| JP2006177319A (en) * | 2004-12-24 | 2006-07-06 | Toyota Motor Corp | Knocking determining device for internal combustion engine |
| JP2007009728A (en) * | 2005-06-28 | 2007-01-18 | Toyota Motor Corp | Ignition timing control device for internal combustion engine |
| US7251556B2 (en) | 2004-12-22 | 2007-07-31 | Toyota Jidosha Kabushiki Kaisha | Knock determination device for internal combustion engine |
| WO2008044622A1 (en) * | 2006-10-03 | 2008-04-17 | Toyota Jidosha Kabushiki Kaisha | Internal combustion engine knocking judging device and knocking judging method |
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| US7441543B2 (en) | 2006-06-16 | 2008-10-28 | Toyota Jidosha Kabushiki Kaisha | Device and method for controlling ignition timing of internal combustion engine |
| US7478622B2 (en) | 2006-06-28 | 2009-01-20 | Toyota Jidosha Kabushiki Kaisha | Device and method for determining knocking of internal combustion engine |
| US7500468B2 (en) | 2006-06-28 | 2009-03-10 | Toyota Jidosha Kabushiki Kaisha | Device and method for determining knocking of internal combustion engine |
| US7624619B2 (en) * | 2007-05-11 | 2009-12-01 | Mitsubishi Electric Corporation | Knocking detecting device for an internal combustion engine |
| US7637247B2 (en) | 2006-03-20 | 2009-12-29 | Toyota Jidosha Kabushiki Kaisha | Device and method for determining knocking of internal combustion engine |
| US7653477B2 (en) | 2006-01-27 | 2010-01-26 | Toyota Jidosha Kabushiki Kaisha | Method and device for control ignition timing through knock control in an internal combustion engine |
| JP2010180836A (en) * | 2009-02-06 | 2010-08-19 | Honda Motor Co Ltd | Knocking detection device of internal combustion engine |
| US7779673B2 (en) | 2006-01-10 | 2010-08-24 | Toyota Jidosha Kabushiki Kaisha | Device and method for determining knocking of internal combustion engine |
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1990
- 1990-07-16 JP JP18521590A patent/JPH0819890B2/en not_active Expired - Fee Related
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| US7206691B2 (en) | 2004-12-24 | 2007-04-17 | Toyota Jidosha Kabushiki Kaisha | Internal combustion engine knock determination device |
| JP4557709B2 (en) * | 2004-12-24 | 2010-10-06 | トヨタ自動車株式会社 | Internal combustion engine knock determination device |
| JP2006177319A (en) * | 2004-12-24 | 2006-07-06 | Toyota Motor Corp | Knocking determining device for internal combustion engine |
| JP2007009728A (en) * | 2005-06-28 | 2007-01-18 | Toyota Motor Corp | Ignition timing control device for internal combustion engine |
| JP4538383B2 (en) * | 2005-06-28 | 2010-09-08 | トヨタ自動車株式会社 | Ignition timing control device for internal combustion engine |
| US7779673B2 (en) | 2006-01-10 | 2010-08-24 | Toyota Jidosha Kabushiki Kaisha | Device and method for determining knocking of internal combustion engine |
| US7653477B2 (en) | 2006-01-27 | 2010-01-26 | Toyota Jidosha Kabushiki Kaisha | Method and device for control ignition timing through knock control in an internal combustion engine |
| US7363142B2 (en) | 2006-03-20 | 2008-04-22 | Toyota Jidosha Kabushiki Kaisha | Device and method for controlling ignition timing of internal combustion engine |
| US7637247B2 (en) | 2006-03-20 | 2009-12-29 | Toyota Jidosha Kabushiki Kaisha | Device and method for determining knocking of internal combustion engine |
| US7392788B2 (en) | 2006-03-20 | 2008-07-01 | Toyota Jidosha Kabushiki Kaisha | Device and method for controlling ignition timing of internal combustion engine |
| US7822533B2 (en) | 2006-05-29 | 2010-10-26 | Toyota Jidosha Kabushiki Kaisha | Knocking determination device and knocking determination method of internal combustion engine |
| US7942040B2 (en) | 2006-05-29 | 2011-05-17 | Toyota Jidosha Kabushiki Kaisha | Knocking determination device and method for internal combustion engine |
| US7441543B2 (en) | 2006-06-16 | 2008-10-28 | Toyota Jidosha Kabushiki Kaisha | Device and method for controlling ignition timing of internal combustion engine |
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| JP2010180836A (en) * | 2009-02-06 | 2010-08-19 | Honda Motor Co Ltd | Knocking detection device of internal combustion engine |
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|---|---|
| JPH0819890B2 (en) | 1996-03-04 |
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