JPH0317161U - - Google Patents
Info
- Publication number
- JPH0317161U JPH0317161U JP7491789U JP7491789U JPH0317161U JP H0317161 U JPH0317161 U JP H0317161U JP 7491789 U JP7491789 U JP 7491789U JP 7491789 U JP7491789 U JP 7491789U JP H0317161 U JPH0317161 U JP H0317161U
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- temperature sensor
- exhaust
- sensor output
- output signal
- 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
- 239000003054 catalyst Substances 0.000 claims description 12
- 238000000746 purification Methods 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims 2
- 230000003197 catalytic effect Effects 0.000 claims 1
- 238000012806 monitoring device Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Exhaust Gas After Treatment (AREA)
Description
第１図は本案の一実施例の構成図、第２図は本
案の判定のフローチヤートである。
１……エンジン、４……排気温センサ、５……
排気ガス浄化触媒、６……触媒温度センサ、８…
…エンジンコントロールモジユール、１０……マ
イクロコンピユータ、１１……Ａ／Ｄコンバータ
内蔵入力回路。
FIG. 1 is a block diagram of an embodiment of the present proposal, and FIG. 2 is a flowchart of the determination of the present proposal. 1...Engine, 4...Exhaust temperature sensor, 5...
Exhaust gas purification catalyst, 6...Catalyst temperature sensor, 8...
...Engine control module, 10...Microcomputer, 11...Input circuit with built-in A/D converter.
Claims (1)
媒の温度を検知するための前記触媒内に設けた触
媒温度センサ、並びに前記排気系の排気ガス浄化
用触媒と内燃機関の間の排気管に設けた排気温を
検知するための排気温度センサを具備し、既触媒
温徳センサの出力並びに既排気温度センサの出力
をそれぞれ別々に電圧信号等を電気信号に変換す
る信号変換器を持ち、電気信号に変換された触媒
温度センサ出力信号と排気温度センサ出力信号と
を比較する手段を持ち、既比較手段によつて比較
した触媒温度センサ出力信号と排気温度センサ出
力信号との差が一定レベル以下となつた時は排気
ガス浄化用触媒の浄化能力が失なわれ又は既触媒
の浄化効率が低レベルであると判断する触媒モニ
タ装置。 ２ 比較する一定レベルをエンジンの運転状態に
応じて決定する請求項第１項記載の触媒モニタ装
置。[Scope of Claim for Utility Model Registration] 1. A catalyst temperature sensor provided in the catalyst for detecting the temperature of an exhaust gas purification catalyst provided in the exhaust system of an internal combustion engine, and an exhaust gas purification catalyst in the exhaust system. Equipped with an exhaust temperature sensor installed in the exhaust pipe between the internal combustion engine to detect the exhaust temperature, and converts the output of the catalytic temperature sensor and the output of the exhaust temperature sensor separately into voltage signals etc. into electrical signals. and a means for comparing the catalyst temperature sensor output signal converted into an electric signal and the exhaust temperature sensor output signal, and the catalyst temperature sensor output signal and the exhaust temperature sensor output compared by the comparison means. A catalyst monitor device that determines that the exhaust gas purifying catalyst has lost its purifying ability or that the purifying efficiency of the existing catalyst is at a low level when the difference from the signal is below a certain level. 2. The catalyst monitoring device according to claim 1, wherein the constant level to be compared is determined depending on the operating state of the engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7491789U JPH0317161U (en) | 1989-06-28 | 1989-06-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7491789U JPH0317161U (en) | 1989-06-28 | 1989-06-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0317161U true JPH0317161U (en) | 1991-02-20 |
Family
ID=31615036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7491789U Pending JPH0317161U (en) | 1989-06-28 | 1989-06-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0317161U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002070873A1 (en) * | 2001-03-02 | 2002-09-12 | Hitachi, Ltd. | Device and method for diagnosing internal combustion engine and internal combustion engine control method using the device and method |
| JP2006520438A (en) * | 2003-03-14 | 2006-09-07 | エミテク・ゲゼルシャフト・フュール・エミシオーンテクノロギー・ミット・ベシュレンクテル・ハフツング | Multi-line exhaust system with at least one detector, honeycomb body with openings for at least one detector, and method of operating a multi-line exhaust system |
-
1989
- 1989-06-28 JP JP7491789U patent/JPH0317161U/ja active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002070873A1 (en) * | 2001-03-02 | 2002-09-12 | Hitachi, Ltd. | Device and method for diagnosing internal combustion engine and internal combustion engine control method using the device and method |
| JP2006520438A (en) * | 2003-03-14 | 2006-09-07 | エミテク・ゲゼルシャフト・フュール・エミシオーンテクノロギー・ミット・ベシュレンクテル・ハフツング | Multi-line exhaust system with at least one detector, honeycomb body with openings for at least one detector, and method of operating a multi-line exhaust system |
| US7721527B2 (en) | 2003-03-14 | 2010-05-25 | Emitec Gesellschaft Fuer Emissionstechnologie Mbh | Multi-line exhaust system having at least one measurement sensor, honeycomb body having a recess for at least one measurement sensor, and method for operating a multi-line exhaust system |
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