JPH02135855U - - Google Patents
Info
- Publication number
- JPH02135855U JPH02135855U JP4401489U JP4401489U JPH02135855U JP H02135855 U JPH02135855 U JP H02135855U JP 4401489 U JP4401489 U JP 4401489U JP 4401489 U JP4401489 U JP 4401489U JP H02135855 U JPH02135855 U JP H02135855U
- Authority
- JP
- Japan
- Prior art keywords
- heater
- heater section
- section
- oxygen sensor
- sensor element
- 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
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 230000005856 abnormality Effects 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
Description
第１図は本考案の一実施例の酸素センサにおけ
るヒータの異常検出装置を示す回路構成図、第２
図はヒータ状態に基づく電位表図、第３図はヒー
タ付酸素センサの構造を示す図、第４図は従来の
ヒータ用回路を示す回路構成図、第５図は従来の
ヒータ状態に基づく電位表図である。
２…ジルコニアチユーブ、４…セラミツクヒー
タ、１４…バツテリ、１５…コントロールユニツ
ト、２２ａ…第１ヒータ部、２２ｂ…第２ヒータ
部。
FIG. 1 is a circuit configuration diagram showing a heater abnormality detection device in an oxygen sensor according to an embodiment of the present invention, and FIG.
The figure is a potential table diagram based on the heater status, Figure 3 is a diagram showing the structure of an oxygen sensor with a heater, Figure 4 is a circuit configuration diagram showing a conventional heater circuit, and Figure 5 is a potential diagram based on the conventional heater status. It is a table diagram. 2... Zirconia tube, 4... Ceramic heater, 14... Battery, 15... Control unit, 22a... First heater section, 22b... Second heater section.
Claims (1)
センサ素子の近傍にセンサ素子加熱用の電熱ヒー
タを配設してなるヒータ付酸素センサにおいて、
ヒータを第１ヒータ部及び該第１ヒータ部と直列
に接続される第２ヒータ部より構成し、一方のヒ
ータ部の両端の電位を検出して前記両方のヒータ
の異常を検出する検出手段を設けたことを特徴と
する酸素センサにおけるヒータの異常検出装置。 In an oxygen sensor with a heater, an electric heater for heating the sensor element is disposed near the sensor element that is attached to the exhaust system of an internal combustion engine and faces the exhaust gas,
The heater includes a first heater section and a second heater section connected in series with the first heater section, and detecting means detects a potential at both ends of one heater section to detect an abnormality in both of the heaters. An abnormality detection device for a heater in an oxygen sensor, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4401489U JPH02135855U (en) | 1989-04-17 | 1989-04-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4401489U JPH02135855U (en) | 1989-04-17 | 1989-04-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02135855U true JPH02135855U (en) | 1990-11-13 |
Family
ID=31556932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4401489U Pending JPH02135855U (en) | 1989-04-17 | 1989-04-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02135855U (en) |
-
1989
- 1989-04-17 JP JP4401489U patent/JPH02135855U/ja active Pending
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