JPH01166752U - - Google Patents
Info
- Publication number
- JPH01166752U JPH01166752U JP6398388U JP6398388U JPH01166752U JP H01166752 U JPH01166752 U JP H01166752U JP 6398388 U JP6398388 U JP 6398388U JP 6398388 U JP6398388 U JP 6398388U JP H01166752 U JPH01166752 U JP H01166752U
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- gas recirculation
- passage
- flowing
- exhaust
- 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 5
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 238000003745 diagnosis Methods 0.000 claims 3
- 230000002159 abnormal effect Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
Description
第１図は本考案の診断装置の構成図、第２図は
本考案を適用した内燃機関の略図、第３図は本考
案による診断装置で実施するフローチヤート、第
４図は燃料噴射時間に対する判定の所定値の設定
例を示す図、第５図は燃料噴射時間に対する吸気
負圧を示す図、第６図は再循環排気ガスの検出温
度の例を示す図、第７図は吸気圧力センサで大気
圧を推定するフローチヤートである。
１２……吸気マニホールド、１４……排気マニ
ホールド、２０……排気再循環通路、２２……Ｅ
ＧＲ制御弁、４４……吸気圧力センサ、５２……
温度センサ、５４……大気圧センサ。
Fig. 1 is a block diagram of the diagnostic device of the present invention, Fig. 2 is a schematic diagram of an internal combustion engine to which the present invention is applied, Fig. 3 is a flowchart of the diagnostic device of the present invention, and Fig. 4 is a diagram showing fuel injection time. A diagram showing an example of setting a predetermined value for determination, FIG. 5 is a diagram showing intake negative pressure with respect to fuel injection time, FIG. 6 is a diagram showing an example of detected temperature of recirculated exhaust gas, and FIG. 7 is a diagram showing intake pressure sensor This is a flowchart for estimating atmospheric pressure. 12...Intake manifold, 14...Exhaust manifold, 20...Exhaust gas recirculation passage, 22...E
GR control valve, 44... Intake pressure sensor, 52...
Temperature sensor, 54... Atmospheric pressure sensor.
Claims (1)
排気再循環通路と該排気再循環通路に配置された
排気再循環制御装置とを具備し、機関の負荷に応
じて燃料噴射時間を計算する燃量噴射時間計算手
段を有する内燃機関において、前記燃料噴射持間
計算手段の出力が所定値よりも小さい時排気再循
環診断領域であると判定する判定手段を含む排気
再循環診断領域判定手段と、前記所定値を高度が
高いほど小さく設定する所定値設定手段と、前記
排気再循環通路に再循環排気ガスが流れているこ
とを検出する検出手段とを設け、機関運転状態が
前記排気再循環診断領域にあるときに前記排気再
循環通路内に再循環排気ガスが流れていれば、前
記排気再循環制御装置が正常と診断し、流れてい
なければ前記排気再循環制御装置が異常であると
診断する内燃機関の排気再循環診断装置。 A fuel amount system comprising an exhaust gas recirculation passage connected from an exhaust passage to an intake passage of an internal combustion engine and an exhaust gas recirculation control device disposed in the exhaust gas recirculation passage, and calculating fuel injection time according to engine load. In an internal combustion engine having an injection time calculation means, the exhaust gas recirculation diagnosis region determination means includes a determination means for determining that the exhaust gas recirculation diagnosis region is reached when the output of the fuel injection duration calculation means is smaller than a predetermined value; A predetermined value setting means for setting a predetermined value to be smaller as the altitude increases, and a detection means for detecting that recirculated exhaust gas is flowing in the exhaust gas recirculation passage are provided, and the engine operating state is determined to be within the exhaust recirculation diagnosis region. If recirculated exhaust gas is flowing in the exhaust gas recirculation passage when the exhaust gas is flowing, the exhaust gas recirculation control device is diagnosed to be normal, and if it is not flowing, the exhaust gas recirculation control device is diagnosed to be abnormal. Exhaust recirculation diagnostic device for internal combustion engines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6398388U JPH01166752U (en) | 1988-05-17 | 1988-05-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6398388U JPH01166752U (en) | 1988-05-17 | 1988-05-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01166752U true JPH01166752U (en) | 1989-11-22 |
Family
ID=31289466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6398388U Pending JPH01166752U (en) | 1988-05-17 | 1988-05-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01166752U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02130253A (en) * | 1988-11-11 | 1990-05-18 | Nippon Denso Co Ltd | Self diagnosing device in exhaust gas recirculation controller |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58152156A (en) * | 1982-03-08 | 1983-09-09 | Toyota Motor Corp | Exhaust gas recircultion controlling method of internal-combustion engine |
| JPS59561A (en) * | 1982-06-23 | 1984-01-05 | Toyota Motor Corp | Method of controlling recirculation of exhaust gas of internal-combustion engine |
| JPS60192869A (en) * | 1984-03-14 | 1985-10-01 | Fuji Heavy Ind Ltd | Exhaust recirculation controller for internal- combustion engine for car |
| JPS63215863A (en) * | 1987-03-03 | 1988-09-08 | Mazda Motor Corp | Exhaust gas reflux device for engine |
| JPS63263254A (en) * | 1987-04-20 | 1988-10-31 | Toyota Motor Corp | Diagnosis device for exhaust gas recirculation apparatus of internal combustion engine |
-
1988
- 1988-05-17 JP JP6398388U patent/JPH01166752U/ja active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58152156A (en) * | 1982-03-08 | 1983-09-09 | Toyota Motor Corp | Exhaust gas recircultion controlling method of internal-combustion engine |
| JPS59561A (en) * | 1982-06-23 | 1984-01-05 | Toyota Motor Corp | Method of controlling recirculation of exhaust gas of internal-combustion engine |
| JPS60192869A (en) * | 1984-03-14 | 1985-10-01 | Fuji Heavy Ind Ltd | Exhaust recirculation controller for internal- combustion engine for car |
| JPS63215863A (en) * | 1987-03-03 | 1988-09-08 | Mazda Motor Corp | Exhaust gas reflux device for engine |
| JPS63263254A (en) * | 1987-04-20 | 1988-10-31 | Toyota Motor Corp | Diagnosis device for exhaust gas recirculation apparatus of internal combustion engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02130253A (en) * | 1988-11-11 | 1990-05-18 | Nippon Denso Co Ltd | Self diagnosing device in exhaust gas recirculation controller |
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