JP6241360B2 - 排出ガスセンサのヒータ制御装置 - Google Patents
排出ガスセンサのヒータ制御装置 Download PDFInfo
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- JP6241360B2 JP6241360B2 JP2014089291A JP2014089291A JP6241360B2 JP 6241360 B2 JP6241360 B2 JP 6241360B2 JP 2014089291 A JP2014089291 A JP 2014089291A JP 2014089291 A JP2014089291 A JP 2014089291A JP 6241360 B2 JP6241360 B2 JP 6241360B2
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- 238000012937 correction Methods 0.000 claims description 19
- 238000005259 measurement Methods 0.000 claims description 17
- 238000002485 combustion reaction Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 42
- 239000007784 solid electrolyte Substances 0.000 description 12
- 239000003054 catalyst Substances 0.000 description 8
- 230000004913 activation Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- 238000011144 upstream manufacturing Methods 0.000 description 5
- 238000013021 overheating Methods 0.000 description 4
- 230000006399 behavior Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/4067—Means for heating or controlling the temperature of the solid electrolyte
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/007—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring oxygen or air concentration downstream of the exhaust apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1446—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being exhaust temperatures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/146—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1493—Details
- F02D41/1494—Control of sensor heater
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/409—Oxygen concentration cells
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/025—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting O2, e.g. lambda sensors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/20—Sensor having heating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
Description
まず、図1に基づいてエンジン制御システムの概略構成を説明する。
内燃機関であるエンジン11の排気管12(排出ガス通路)には、排出ガス中のCO,HC,NOX 等を浄化する三元触媒等の上流側触媒13と下流側触媒14が設けられている。また、上流側触媒13の上流側には、排出ガスの空燃比を検出する空燃比センサ15が設けられ、上流側触媒13の下流側(上流側触媒13と下流側触媒14との間)には、排出ガスのリッチ/リーンを検出する酸素センサ16が設けられている。更に、下流側触媒14の下流側には、排出ガス中のNOX 濃度を検出するNOX センサ17が設けられている。
NOX センサ17のセンサ素子19は、ポンプセル20とモニタセル21とセンサセル22とを有する3セル構造のセンサ素子である。このセンサ素子19は、酸素イオン伝導性材料からなる第1及び第2の固体電解質体23,24が、アルミナ等の絶縁材料からなるスペーサ25を介して所定間隔を隔てて積層されている。
図5に示すように、インピーダンス制御の際に、ヒータ37の通電条件とエンジン11の運転条件のうちの少なくとも一つのパラメータ(例えばヒータ37の電力とエンジン11の排出ガス温度)に基づいてセンサセル22の温度を推定する。このセンサセル22の温度の推定値である推定センサセル温度TSが許容上限温度以下になるように目標インピーダンスTZを補正する。具体的には、目標センサセル温度TT(例えばセンサセル22の許容上限温度よりも少し低い温度)と推定センサセル温度TSとの偏差ΔTSを小さくするようにPI制御等により目標インピーダンスの補正値ΔTZを算出し、この補正値ΔTZを用いて目標インピーダンスTZを補正する。
図6に示すヒータ通電制御ルーチンは、ECU18の電源オン期間中に所定周期で繰り返し実行され、特許請求の範囲でいうヒータ通電制御手段としての役割を果たす。
ΔTS=TT−TS
ここで、目標センサセル温度TTは、例えば、センサセル22の許容上限温度よりも少し低い温度に設定されている(図5参照)。
ΔTZ=Kp ×ΔTS+Ki ×ΣΔTS
ここで、Kp は比例ゲインであり、Ki は積分ゲインである。
TZ=TZb +ΔTZ
Claims (3)
- 内燃機関(11)の排出ガス通路(12)に設置されると共に複数のセル(20,21,22)を有するセンサ素子(19)と該センサ素子(19)を加熱するヒータ(37)とを備えた排出ガスセンサ(17)と、前記複数のセル(20,21,22)のうちの一つの測定対象セル(20)のインピーダンスを検出して該測定対象セル(20)のインピーダンスを目標インピーダンスに一致させるように前記ヒータ(37)の通電を制御するインピーダンス制御を実行するヒータ通電制御手段(18)とを備えた排出ガスセンサのヒータ制御装置において、
前記ヒータ通電制御手段(18)は、前記インピーダンス制御の際に、前記ヒータ(37)の通電条件と前記内燃機関(11)の運転条件のうちの少なくとも一つのパラメータに基づいて前記測定対象セル(20)以外の他のセル(22)の温度を推定して、該他のセル(22)の温度が許容上限温度以下になるように前記目標インピーダンスを補正することを特徴とする排出ガスセンサのヒータ制御装置。 - 前記ヒータ通電制御手段(18)は、前記パラメータに応じて区分された学習領域毎に前記目標インピーダンスの補正値を学習することを特徴とする請求項1に記載の排出ガスセンサのヒータ制御装置。
- 前記ヒータ通電制御手段(18)は、前記パラメータとして前記ヒータ(37)の電力と前記内燃機関(11)の排出ガス温度とを用いて前記他のセル(22)の温度を推定することを特徴とする請求項1又は2に記載の排出ガスセンサのヒータ制御装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014089291A JP6241360B2 (ja) | 2014-04-23 | 2014-04-23 | 排出ガスセンサのヒータ制御装置 |
PCT/JP2015/001981 WO2015162866A1 (ja) | 2014-04-23 | 2015-04-08 | 排出ガスセンサのヒータ制御装置 |
US15/120,629 US20170010236A1 (en) | 2014-04-23 | 2015-04-08 | Heater control device for exhaust gas sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP2014089291A JP6241360B2 (ja) | 2014-04-23 | 2014-04-23 | 排出ガスセンサのヒータ制御装置 |
Publications (2)
Publication Number | Publication Date |
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JP2015206767A JP2015206767A (ja) | 2015-11-19 |
JP6241360B2 true JP6241360B2 (ja) | 2017-12-06 |
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Application Number | Title | Priority Date | Filing Date |
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JP2014089291A Active JP6241360B2 (ja) | 2014-04-23 | 2014-04-23 | 排出ガスセンサのヒータ制御装置 |
Country Status (3)
Country | Link |
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US (1) | US20170010236A1 (ja) |
JP (1) | JP6241360B2 (ja) |
WO (1) | WO2015162866A1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6550689B2 (ja) * | 2014-05-07 | 2019-07-31 | 株式会社デンソー | 排出ガスセンサのヒータ制御装置 |
JP6731283B2 (ja) * | 2016-05-11 | 2020-07-29 | 株式会社Soken | ガスセンサ |
JP6583302B2 (ja) * | 2017-02-13 | 2019-10-02 | トヨタ自動車株式会社 | ガス検出装置 |
CN106968763B (zh) * | 2017-03-31 | 2019-07-09 | 凯晟动力技术(嘉兴)有限公司 | 一种用于前氧传感器的加热器的加热功率修正方法及系统 |
JP6828647B2 (ja) * | 2017-09-29 | 2021-02-10 | 株式会社デンソー | 制御装置 |
JP6900937B2 (ja) * | 2018-06-08 | 2021-07-14 | 株式会社デンソー | 制御装置 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3983422B2 (ja) * | 1998-09-29 | 2007-09-26 | 株式会社デンソー | ガス濃度検出装置 |
JP3692914B2 (ja) * | 2000-08-07 | 2005-09-07 | 株式会社デンソー | ガス濃度センサのヒータ制御装置 |
JP2009192289A (ja) * | 2008-02-13 | 2009-08-27 | Denso Corp | ガス濃度検出装置 |
JP5465263B2 (ja) * | 2011-02-04 | 2014-04-09 | 日本特殊陶業株式会社 | NOxセンサ制御装置 |
JP5851366B2 (ja) * | 2011-09-29 | 2016-02-03 | 日本特殊陶業株式会社 | センサ制御装置及びセンサ制御システム |
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2014
- 2014-04-23 JP JP2014089291A patent/JP6241360B2/ja active Active
-
2015
- 2015-04-08 US US15/120,629 patent/US20170010236A1/en not_active Abandoned
- 2015-04-08 WO PCT/JP2015/001981 patent/WO2015162866A1/ja active Application Filing
Also Published As
Publication number | Publication date |
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JP2015206767A (ja) | 2015-11-19 |
US20170010236A1 (en) | 2017-01-12 |
WO2015162866A1 (ja) | 2015-10-29 |
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