JPH0452961U - - Google Patents
Info
- Publication number
- JPH0452961U JPH0452961U JP9663490U JP9663490U JPH0452961U JP H0452961 U JPH0452961 U JP H0452961U JP 9663490 U JP9663490 U JP 9663490U JP 9663490 U JP9663490 U JP 9663490U JP H0452961 U JPH0452961 U JP H0452961U
- Authority
- JP
- Japan
- Prior art keywords
- back electromotive
- detection means
- operating state
- injector
- detects
- 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
- 238000001514 detection method Methods 0.000 claims description 6
- 230000005856 abnormality Effects 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims 1
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
Landscapes
- Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
Description
第１図は本考案の基本概念図、第２〜７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図はその逆起電圧検出回路１５の
詳細な回路図、第４図はその作用を説明するため
のタイミングチヤート、第５図はその割込許可の
プログラムを示すフローチヤート、第６図はその
インジエクタの故障判定プログラムを示すフロー
チヤート、第７図はその効果を説明するための波
形図、第８図は従来のインジエクタの故障判定装
置の問題点を説明するための波形図である。
１……エンジン、４ａ〜４ｆ……インジエクタ
、１３……運転状態検出手段（異常判定手段）、
１４…コントロールユニツト、１５……逆起電圧
検出回路（逆起電圧検出手段）。
FIG. 1 is a basic conceptual diagram of the present invention, FIGS. 2 to 7 are diagrams showing an embodiment of the present invention, FIG. 2 is an overall configuration diagram thereof, and FIG. 3 is a diagram of the back electromotive voltage detection circuit 15. A detailed circuit diagram, FIG. 4 is a timing chart for explaining its operation, FIG. 5 is a flowchart showing the interrupt permission program, and FIG. 6 is a flowchart showing the injector failure determination program. FIG. 7 is a waveform diagram for explaining the effect thereof, and FIG. 8 is a waveform diagram for explaining the problems of the conventional injector failure determination device. 1... Engine, 4a to 4f... Injector, 13... Operating state detection means (abnormality determination means),
14...Control unit, 15...Back electromotive voltage detection circuit (back electromotive force detection means).
Claims (1)
電圧を燃料噴射終了タイミングに同期して検出す
る逆起電圧検出手段と、 (b) エンジンの運転状態を検出する運転状態検
出手段と、 (c) エンジンが所定の運転状態にあるとき、前
記逆起電圧検出手段の出力が所定の設定値より小
さいとき異常と判定する異常判定手段と、 を備えたことを特徴とするインジエクタの故障判
定装置。[Claims for Utility Model Registration] (a) A back electromotive force detection means that detects the back electromotive force generated when the injector is turned off in synchronization with the fuel injection end timing; (b) An operation that detects the engine operating state. and (c) abnormality determining means that determines that there is an abnormality when the output of the back electromotive voltage detection means is smaller than a predetermined set value when the engine is in a predetermined operating state. Injector failure determination device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9663490U JPH0452961U (en) | 1990-09-13 | 1990-09-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9663490U JPH0452961U (en) | 1990-09-13 | 1990-09-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0452961U true JPH0452961U (en) | 1992-05-06 |
Family
ID=31836323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9663490U Pending JPH0452961U (en) | 1990-09-13 | 1990-09-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0452961U (en) |
-
1990
- 1990-09-13 JP JP9663490U patent/JPH0452961U/ja active Pending
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