JPH0426361U - - Google Patents
Info
- Publication number
- JPH0426361U JPH0426361U JP6737990U JP6737990U JPH0426361U JP H0426361 U JPH0426361 U JP H0426361U JP 6737990 U JP6737990 U JP 6737990U JP 6737990 U JP6737990 U JP 6737990U JP H0426361 U JPH0426361 U JP H0426361U
- Authority
- JP
- Japan
- Prior art keywords
- fuel ratio
- heater
- air
- ratio sensor
- time
- 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 8
- 238000001514 detection method Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
Landscapes
- Measuring Oxygen Concentration In Cells (AREA)
Description
図面は本考案の実施例を示し、第１図はＶ型エ
ンジンの概略構成図、第２図はヒータ付Ｏ２セン
サの具体的構成を示す図、第３図はコントローラ
によるヒータ付Ｏ２センサのヒータ断線故障の検
出を示すフローチヤート図、第４図は作動説明図
である。
１……Ｖ型エンジン、２０……ヒータ付Ｏ２セ
ンサ（ヒータ付空燃比センサ）、２０ａ……検出
部、２０ａ１……酸素感応体、２０ａ２……ヒー
タ、３０……コントローラ、３１，３２……時間
計測手段、３３……故障判別手段。
The drawings show an embodiment of the present invention, in which Fig. 1 is a schematic configuration diagram of a V-type engine, Fig. 2 is a diagram showing a specific configuration of an O 2 sensor with a heater, and Fig. 3 is an O 2 sensor with a heater by a controller. FIG. 4 is a flowchart showing the detection of a heater disconnection failure, and FIG. 4 is an operational diagram. DESCRIPTION OF SYMBOLS 1... V-type engine, 20... O2 sensor with heater (air-fuel ratio sensor with heater), 20a... detection unit, 20a 1 ... oxygen sensitive body, 20a 2 ... heater, 30... controller, 31, 32...Time measuring means, 33...Failure determining means.
Claims (1)
出部を加熱するヒータを有する空燃比センサの該
ヒータの断線故障を検出するようにした故障検出
装置であつて、上記複数のヒータ付空燃比センサ
の作動の開始時から出力が設定値に達するまでの
時間を各々計測する時間計測手段と、該各時間計
測手段により計測した各時間の差が設定時間以上
大きくなつたとき、その時間差の大きくなつた２
つのヒータ付空燃比センサのうち、出力が設定値
に達するまでの時間の長い側のヒータ付空燃比セ
ンサのヒータの断線時と判別する断線判別手段と
を備えたことを特徴とするヒータ付空燃比センサ
の故障検出装置。 A failure detection device configured to detect a disconnection failure of an air-fuel ratio sensor provided in each of a plurality of independent exhaust systems and having a heater that heats a detection part, the plurality of air-fuel ratio sensors with heaters as described above. When the difference between the time measurement means that measures the time from the start of operation until the output reaches the set value and each time measured by each time measurement means becomes larger than the set time, the time difference becomes large. Ta2
The heater-equipped air-fuel ratio sensor is characterized in that the heater-equipped air-fuel ratio sensor is equipped with a disconnection determination means for determining that the heater of the heater-equipped air-fuel ratio sensor whose output takes longer to reach a set value among the heater-equipped air-fuel ratio sensors is disconnected. Failure detection device for fuel ratio sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6737990U JPH0426361U (en) | 1990-06-25 | 1990-06-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6737990U JPH0426361U (en) | 1990-06-25 | 1990-06-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0426361U true JPH0426361U (en) | 1992-03-02 |
Family
ID=31600903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6737990U Pending JPH0426361U (en) | 1990-06-25 | 1990-06-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0426361U (en) |
-
1990
- 1990-06-25 JP JP6737990U patent/JPH0426361U/ja active Pending
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