JPS61114334U - - Google Patents
Info
- Publication number
- JPS61114334U JPS61114334U JP13086185U JP13086185U JPS61114334U JP S61114334 U JPS61114334 U JP S61114334U JP 13086185 U JP13086185 U JP 13086185U JP 13086185 U JP13086185 U JP 13086185U JP S61114334 U JPS61114334 U JP S61114334U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- comparison
- switching
- knocking
- amplifier
- 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
- 238000001514 detection method Methods 0.000 claims description 3
- 238000012935 Averaging Methods 0.000 claims description 2
- 230000003321 amplification Effects 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Testing Of Engines (AREA)
- Electrical Control Of Ignition Timing (AREA)
Description
第１図はこの考案の前提となる従来のノツキン
グ検出装置の一例を示すブロツク図である。第２
図イ〜ハは第１図の動作説明に供する各部の信号
波形図である。第３図は点火時期とノツキングの
強さとの関係を示す線図である。第４図は比較信
号の信号レベルとノツキングによる最大信号レベ
ルのエンジン回転数特性を示す線図である。第５
図はこの考案の実施例を示すブロツク図である。
１……振動センサ、２……バンドパスフイルタ
、３……比較レベル形成回路、４……整流回路、
５……平均化回路、６，７……増幅器、８……比
較器、１５……切換回路（第１の切換手段）、１
６……エンジン回転数判別回路、１７……切換回
路（第２の切換手段）。
FIG. 1 is a block diagram showing an example of a conventional knocking detection device, which is the premise of this invention. Second
Figures A to C are signal waveform diagrams of various parts for explaining the operation of Figure 1. FIG. 3 is a diagram showing the relationship between ignition timing and knocking strength. FIG. 4 is a diagram showing the engine speed characteristics of the signal level of the comparison signal and the maximum signal level due to knocking. Fifth
The figure is a block diagram showing an embodiment of this invention. 1... Vibration sensor, 2... Band pass filter, 3... Comparison level forming circuit, 4... Rectifier circuit,
5...Averaging circuit, 6, 7...Amplifier, 8...Comparator, 15...Switching circuit (first switching means), 1
6... Engine speed determination circuit, 17... Switching circuit (second switching means).
Claims (1)
振動センサの出力信号を整流する整流手段とその
整流信号を平均化する平均化手段とその平均化信
号を増幅する増幅器とからなるノツキングの発生
を検出するための比較信号を形成する比較レベル
形成手段と、この比較レベル形成手段からの比較
信号と前記振動センサの出力信号あるいはその整
流信号とを比較してノツキングの発生を検出する
比較手段とを具備したノツキング検出装置におい
て、 エンジンの設定回転数を判別するエンジン回転
数判別手段と、その判別出力に応じて上記比較レ
ベル形成手段の増幅器の増幅率を切換える第１の
切換手段と、上記判別出力に応じて上記増幅器の
オフセツト値を切換える第２の切換手段とを設け
たことを特徴とするノツキング検出装置。[Claim for Utility Model Registration] A vibration sensor that detects engine vibration, a rectifier that rectifies the output signal of the vibration sensor, an averaging device that averages the rectified signal, and an amplifier that amplifies the averaged signal. a comparison level forming means for forming a comparison signal for detecting the occurrence of knocking, and comparing the comparison signal from the comparison level forming means with the output signal of the vibration sensor or its rectified signal to detect the occurrence of knocking. In the knocking detection device, the knocking detection device is equipped with a comparison means for detecting engine rotation speed, and a first switching device for switching the amplification factor of the amplifier of the comparison level forming means in accordance with the discrimination output thereof. and second switching means for switching the offset value of the amplifier in accordance with the discrimination output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13086185U JPS6234267Y2 (en) | 1985-08-29 | 1985-08-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13086185U JPS6234267Y2 (en) | 1985-08-29 | 1985-08-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61114334U true JPS61114334U (en) | 1986-07-19 |
| JPS6234267Y2 JPS6234267Y2 (en) | 1987-09-01 |
Family
ID=30689454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13086185U Expired JPS6234267Y2 (en) | 1985-08-29 | 1985-08-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6234267Y2 (en) |
-
1985
- 1985-08-29 JP JP13086185U patent/JPS6234267Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6234267Y2 (en) | 1987-09-01 |
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