JPH0180639U - - Google Patents
Info
- Publication number
- JPH0180639U JPH0180639U JP1987176713U JP17671387U JPH0180639U JP H0180639 U JPH0180639 U JP H0180639U JP 1987176713 U JP1987176713 U JP 1987176713U JP 17671387 U JP17671387 U JP 17671387U JP H0180639 U JPH0180639 U JP H0180639U
- Authority
- JP
- Japan
- Prior art keywords
- internal combustion
- combustion engine
- temperature drop
- exhaust temperature
- engine output
- 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
- 239000000446 fuel Substances 0.000 claims description 3
- 230000005856 abnormality Effects 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 3
- 238000003745 diagnosis Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Description
第１図は本考案の排気温度診断装置を備えたデ
イーゼル機関の模式図、第２図は機関出力の増加
に伴う正常気筒と燃料系異常気筒の排気温度の時
間変化を示す図、第３図は特定の燃料系異常によ
る標準排気温度降下速度と機関出力の関係を示す
図、第４図は上記排気温度診断装置の処理の流れ
を示すフローチヤートである。
１…デイーゼル機関、２…ラツク目盛センサ、
３，３…排気温度センサ、４…コンピユータ、５
…表示装置。
Fig. 1 is a schematic diagram of a diesel engine equipped with the exhaust temperature diagnosis device of the present invention, Fig. 2 is a diagram showing temporal changes in exhaust temperature of normal cylinders and fuel system abnormal cylinders as the engine output increases, Fig. 3 4 is a diagram showing the relationship between the standard exhaust temperature drop rate and engine output due to a specific fuel system abnormality, and FIG. 4 is a flowchart showing the processing flow of the exhaust gas temperature diagnosis device. 1... Diesel engine, 2... Easy scale sensor,
3, 3...Exhaust temperature sensor, 4...Computer, 5
...display device.
Claims (1)
と、内燃機関の各気筒に設けられた排気温度セン
サと、気筒への燃料供給が特定の異常で阻害され
たとき、所定時間の間にその気筒の排気温度に機
関出力に対応して生じる標準的な温度降下即ち標
準温度降下速度を記憶する記憶手段と、上記排気
温度センサからの入力信号に基づいて求めた上記
所定時間における排気温度の降下速度と上記機関
出力センサからの入力信号に基づいて求めた上記
標準温度降下速度との偏差を求め、この偏差が所
定の許容値以内であるか否かを判別する温度降下
速度判別手段とを備えて、上記温度降下速度判別
手段の判別結果によつて、各気筒の燃料系の異常
に関する情報を得るようにしたことを特徴とする
内燃機関の排気温度診断装置。 An engine output sensor that detects the engine output of an internal combustion engine, an exhaust temperature sensor installed in each cylinder of the internal combustion engine, and an exhaust temperature sensor installed in each cylinder of the internal combustion engine. a storage means for storing a standard temperature drop, that is, a standard temperature drop rate that occurs in the exhaust temperature in response to the engine output; and a rate of fall in the exhaust temperature over the predetermined time determined based on the input signal from the exhaust temperature sensor. Temperature drop rate determination means for determining a deviation from the standard temperature drop rate determined based on the input signal from the engine output sensor and determining whether or not this deviation is within a predetermined tolerance value; An exhaust gas temperature diagnostic device for an internal combustion engine, characterized in that information regarding an abnormality in the fuel system of each cylinder is obtained based on the determination result of the temperature drop rate determining means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987176713U JPH082438Y2 (en) | 1987-11-19 | 1987-11-19 | Exhaust temperature diagnostic device for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987176713U JPH082438Y2 (en) | 1987-11-19 | 1987-11-19 | Exhaust temperature diagnostic device for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0180639U true JPH0180639U (en) | 1989-05-30 |
| JPH082438Y2 JPH082438Y2 (en) | 1996-01-29 |
Family
ID=31468423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987176713U Expired - Lifetime JPH082438Y2 (en) | 1987-11-19 | 1987-11-19 | Exhaust temperature diagnostic device for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH082438Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57160929U (en) * | 1981-04-06 | 1982-10-08 |
-
1987
- 1987-11-19 JP JP1987176713U patent/JPH082438Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57160929U (en) * | 1981-04-06 | 1982-10-08 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH082438Y2 (en) | 1996-01-29 |
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