JPS61147369U - - Google Patents
Info
- Publication number
- JPS61147369U JPS61147369U JP3142585U JP3142585U JPS61147369U JP S61147369 U JPS61147369 U JP S61147369U JP 3142585 U JP3142585 U JP 3142585U JP 3142585 U JP3142585 U JP 3142585U JP S61147369 U JPS61147369 U JP S61147369U
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- diesel engine
- envelope
- injection valve
- normal
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Description
第１図は本考案の基本概念図、第２、３図は本
考案の一実施例を示す図であり、第２図はその全
体構成図、第３図ａ〜ｃはその作用を説明するた
めのタイミングチヤート、第４図ａ〜ｄは一般的
な燃料噴射弁の各種噴霧特性を示す図である。
１……燃料噴射弁、４……振動センサ、６……
フイルタアンプ（抽出手段）、７……包絡線検出
手段、１０……表示装置（判別手段）、１１……
記憶回路（記憶手段）。
Figure 1 is a basic conceptual diagram of the present invention, Figures 2 and 3 are diagrams showing an embodiment of the present invention, Figure 2 is its overall configuration diagram, and Figures 3 a to c explain its operation. FIGS. 4a to 4d are timing charts showing various spray characteristics of common fuel injection valves. 1...Fuel injection valve, 4...Vibration sensor, 6...
Filter amplifier (extraction means), 7... Envelope detection means, 10... Display device (discrimination means), 11...
Memory circuit (memory means).
Claims (1)
出する振動センサと、 ｂ 振動センサの出力から所定の周波数帯域の信
号を抽出する抽出手段と、 ｃ 抽出手段の出力を整流しその包絡線信号を出
力する包絡線検出手段と、 ｄ 燃料噴射弁の噴霧特性が正常であるときの前
記包絡線信号波形を正常包絡線として記憶する記
憶手段と、 ｅ 包絡線検出手段の出力と記憶手段から読み出
した正常包絡線とを比較し、燃料噴射弁の噴霧特
性が正常であるか否かが判別できるように表示す
る判別手段と、 を備えたことを特徴とするデイーゼルエンジンの
燃料噴射弁診断装置。[Scope of Claim for Utility Model Registration] a. A vibration sensor that detects the vibration of a fuel injection valve of a diesel engine; b. Extraction means for extracting a signal in a predetermined frequency band from the output of the vibration sensor; c. Rectification of the output of the extraction means. an envelope detecting means for outputting an envelope signal of the above; d a storage means for storing the envelope signal waveform when the spray characteristics of the fuel injection valve are normal as a normal envelope; e an output of the envelope detecting means. A fuel for a diesel engine, characterized in that the fuel for a diesel engine is characterized in that the fuel for a diesel engine is characterized in that the fuel for a diesel engine is characterized by comprising: a determination means for comparing the normal envelope curve read from the storage means and displaying the spray characteristics of the fuel injector so that it can be determined whether or not the spray characteristics of the fuel injection valve are normal. Injection valve diagnostic device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3142585U JPS61147369U (en) | 1985-03-04 | 1985-03-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3142585U JPS61147369U (en) | 1985-03-04 | 1985-03-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61147369U true JPS61147369U (en) | 1986-09-11 |
Family
ID=30532022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3142585U Pending JPS61147369U (en) | 1985-03-04 | 1985-03-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61147369U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015219078A (en) * | 2014-05-16 | 2015-12-07 | 株式会社日立ハイテクノロジーズ | Valve state diagnosis system and valve state diagnosis method |
-
1985
- 1985-03-04 JP JP3142585U patent/JPS61147369U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015219078A (en) * | 2014-05-16 | 2015-12-07 | 株式会社日立ハイテクノロジーズ | Valve state diagnosis system and valve state diagnosis method |
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