JPH0232051U - - Google Patents
Info
- Publication number
- JPH0232051U JPH0232051U JP10912688U JP10912688U JPH0232051U JP H0232051 U JPH0232051 U JP H0232051U JP 10912688 U JP10912688 U JP 10912688U JP 10912688 U JP10912688 U JP 10912688U JP H0232051 U JPH0232051 U JP H0232051U
- Authority
- JP
- Japan
- Prior art keywords
- heater
- current
- detection circuit
- detects
- circuit
- 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
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
Landscapes
- Measuring Oxygen Concentration In Cells (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
第1図はこの考案の第1の実施例の回路図、第
2図はヒータ温度とヒータ抵抗との相関図、第3
図は酸素センサの構造図、第4図は第2の実施例
の回路図、第5図は従来例の回路図である。
21……酸素センサ、25……ヒータ、37…
…マイクロコンピユータ(演算回路)、49……
ヒータ電圧検出回路、63……ヒータ電流検出回
路、79……ヒータ電流制御回路。
Figure 1 is a circuit diagram of the first embodiment of this invention, Figure 2 is a correlation diagram between heater temperature and heater resistance, and Figure 3 is a diagram of the correlation between heater temperature and heater resistance.
This figure is a structural diagram of an oxygen sensor, FIG. 4 is a circuit diagram of the second embodiment, and FIG. 5 is a circuit diagram of a conventional example. 21...Oxygen sensor, 25...Heater, 37...
...Microcomputer (arithmetic circuit), 49...
Heater voltage detection circuit, 63... Heater current detection circuit, 79... Heater current control circuit.
Claims (1)
的に組込まれたヒータの電圧値を検出するヒータ
電圧検出回路と、ヒータの電流値を検出するヒー
タ電流検出回路と、前記ヒータ電圧検出回路及び
ヒータ電流検出回路の各出力信号を受けてヒータ
の抵抗値を演算する演算回路と、この演算回路が
演算した抵抗値を基に前記酸素センサの温度をほ
ぼ一定に保つよう前記ヒータの電流を制御するヒ
ータ電流制御回路とを有することを特徴とする酸
素センサの温度制御装置。 A heater voltage detection circuit that detects a voltage value of a heater integrated into an oxygen sensor that detects oxygen concentration in exhaust gas, a heater current detection circuit that detects a current value of the heater, and the heater voltage detection circuit and the heater. an arithmetic circuit that receives each output signal of the current detection circuit and calculates a resistance value of the heater; and a current of the heater that is controlled to keep the temperature of the oxygen sensor substantially constant based on the resistance value calculated by this arithmetic circuit. 1. A temperature control device for an oxygen sensor, comprising: a heater current control circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10912688U JPH0232051U (en) | 1988-08-22 | 1988-08-22 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10912688U JPH0232051U (en) | 1988-08-22 | 1988-08-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0232051U true JPH0232051U (en) | 1990-02-28 |
Family
ID=31345089
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10912688U Pending JPH0232051U (en) | 1988-08-22 | 1988-08-22 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0232051U (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003065999A (en) * | 2001-08-28 | 2003-03-05 | Denso Corp | Temperature controller and controlling method for gas sensor element |
JP2005024561A (en) * | 2003-07-03 | 2005-01-27 | Sulzer Hexis Ag | Measuring device for monitoring residual oxygen in exhaust gas |
-
1988
- 1988-08-22 JP JP10912688U patent/JPH0232051U/ja active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003065999A (en) * | 2001-08-28 | 2003-03-05 | Denso Corp | Temperature controller and controlling method for gas sensor element |
JP4681170B2 (en) * | 2001-08-28 | 2011-05-11 | 株式会社デンソー | Temperature control device and temperature control method for gas sensor element |
JP2005024561A (en) * | 2003-07-03 | 2005-01-27 | Sulzer Hexis Ag | Measuring device for monitoring residual oxygen in exhaust gas |
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