JPH0411240U - - Google Patents
Info
- Publication number
- JPH0411240U JPH0411240U JP5185690U JP5185690U JPH0411240U JP H0411240 U JPH0411240 U JP H0411240U JP 5185690 U JP5185690 U JP 5185690U JP 5185690 U JP5185690 U JP 5185690U JP H0411240 U JPH0411240 U JP H0411240U
- Authority
- JP
- Japan
- Prior art keywords
- internal combustion
- combustion engine
- misfire determination
- misfire
- determination means
- 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 5
- 239000000446 fuel Substances 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 239000007789 gas Substances 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
Description
第１図はこの考案の構成を示すクレーム対応図
、第２図はこの考案の一実施例の構成を示す説明
図、第３図はこの実施例における失火検出処理を
示すメインフローチヤート、第４図、第５図およ
び第６図はそのメインフローチヤートにおけるス
テツプＳ３の処理の一例を示すフローチヤート、
第７図はその処理を説明するためのタイミングチ
ヤート、第８図は第３図のメインフローチヤート
におけるステツプＳ５の処理を説明するためのタ
イミングチヤート、第９図および第１０図はその
処理の一例を示すフローチヤートである。
１……角速度検出手段、２……第１の失火判定
手段、３……空燃比センサ、４……第２の失火判
定手段、５……運転状態検出手段、６……最終失
火判定手段。
FIG. 1 is a claim correspondence diagram showing the configuration of this invention, FIG. 2 is an explanatory diagram showing the configuration of an embodiment of this invention, FIG. 3 is a main flowchart showing misfire detection processing in this embodiment, and FIG. 5 and 6 are flowcharts showing an example of the processing of step S3 in the main flowchart,
FIG. 7 is a timing chart for explaining the process, FIG. 8 is a timing chart for explaining the process at step S5 in the main flowchart of FIG. 3, and FIGS. 9 and 10 are examples of the process. This is a flowchart showing the following. DESCRIPTION OF SYMBOLS 1... Angular velocity detection means, 2... First misfire determination means, 3... Air-fuel ratio sensor, 4... Second misfire determination means, 5... Operating state detection means, 6... Final misfire determination means.
Claims (1)
度検出手段と、 前記角速度の変化に基づいて内燃機関の失火を
判定する第１の失火判定手段と、 内燃機関の排気系に設けられ、排気ガス中の酸
素濃度を検出する空燃比センサと、 この空燃比センサの出力信号の変化に基づいて
内燃機関の失火を判定する第２の失火判定手段と
、 内燃機関の運転状態を検出する運転状態検出手
段と、 前記運転状態に応じて前記２つの失火判定手段
の失火判定結果を選択し最終的な内燃機関の失火
判定を行う最終失火判定手段と、 を備えたことを特徴とする内燃機関の失火検出装
置。[Claims for Utility Model Registration] Angular velocity detection means for detecting the angular velocity of a crankshaft of an internal combustion engine; first misfire determination means for determining a misfire in the internal combustion engine based on a change in the angular velocity; and an exhaust system of the internal combustion engine. an air-fuel ratio sensor that is installed in the air-fuel ratio sensor and detects the oxygen concentration in the exhaust gas; a second misfire determination means that determines whether the internal combustion engine has misfired based on a change in the output signal of the air-fuel ratio sensor; and an operating state of the internal combustion engine. and a final misfire determination means that selects the misfire determination results of the two misfire determination means according to the operating state and makes a final misfire determination of the internal combustion engine. A misfire detection device for internal combustion engines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5185690U JPH0411240U (en) | 1990-05-18 | 1990-05-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5185690U JPH0411240U (en) | 1990-05-18 | 1990-05-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0411240U true JPH0411240U (en) | 1992-01-30 |
Family
ID=31571660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5185690U Pending JPH0411240U (en) | 1990-05-18 | 1990-05-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0411240U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04318256A (en) * | 1991-04-18 | 1992-11-09 | Mitsubishi Motors Corp | Misfire detecting method for engine |
-
1990
- 1990-05-18 JP JP5185690U patent/JPH0411240U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04318256A (en) * | 1991-04-18 | 1992-11-09 | Mitsubishi Motors Corp | Misfire detecting method for engine |
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