JP5815482B2 - センサ制御装置 - Google Patents
センサ制御装置 Download PDFInfo
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- JP5815482B2 JP5815482B2 JP2012157430A JP2012157430A JP5815482B2 JP 5815482 B2 JP5815482 B2 JP 5815482B2 JP 2012157430 A JP2012157430 A JP 2012157430A JP 2012157430 A JP2012157430 A JP 2012157430A JP 5815482 B2 JP5815482 B2 JP 5815482B2
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- 239000007789 gas Substances 0.000 claims description 184
- 239000001301 oxygen Substances 0.000 claims description 140
- 229910052760 oxygen Inorganic materials 0.000 claims description 140
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 133
- 238000005259 measurement Methods 0.000 claims description 107
- 238000001514 detection method Methods 0.000 claims description 72
- 239000007784 solid electrolyte Substances 0.000 claims description 44
- 230000004913 activation Effects 0.000 claims description 22
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 174
- 238000000034 method Methods 0.000 description 92
- 230000008569 process Effects 0.000 description 90
- 238000001994 activation Methods 0.000 description 28
- 230000000875 corresponding effect Effects 0.000 description 22
- 238000012545 processing Methods 0.000 description 22
- 239000000126 substance Substances 0.000 description 22
- 230000008859 change Effects 0.000 description 12
- 238000002485 combustion reaction Methods 0.000 description 9
- 239000010410 layer Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 238000009792 diffusion process Methods 0.000 description 7
- -1 oxygen ion Chemical class 0.000 description 7
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 6
- 239000012212 insulator Substances 0.000 description 6
- 238000005086 pumping Methods 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 4
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000003213 activating effect Effects 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 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 229910001260 Pt alloy Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000011195 cermet Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
Images
Classifications
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- 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
-
- 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
-
- 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
- G01N27/416—Systems
- G01N27/417—Systems using cells, i.e. more than one cell and probes with solid electrolytes
- G01N27/419—Measuring voltages or currents with a combination of oxygen pumping cells and oxygen concentration cells
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0037—NOx
-
- 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
- F02D41/1473—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation method
- F02D41/1474—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation method by detecting the commutation time of the sensor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Molecular Biology (AREA)
- Combustion & Propulsion (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Description
上記第一実施形態のメイン処理を行った場合に、ガスセンサ10に未燃性物質が侵入した場合にも、安定して早期に特定ガス濃度の検知を可能となるか否か確認する評価試験を行った。具体的には、同一の構成を有するガスセンサ10を備えたセンサ制御装置1において、互いに異なる条件1から条件3のそれぞれで得られたNOx濃度対応値の経時変化を比較した。条件1は、ガスセンサ10に未燃性物質を侵入させない状態で従来方法によって予備制御を行った場合である。条件2は、ガスセンサ10に未燃性物質を侵入させた状態で従来方法によって予備制御を行った場合である。条件3は、ガスセンサ10に未燃性物質を侵入させた状態で第一実施形態のメイン処理に従って予備制御を行った場合である。なお、本評価では、ハウジングの外周に公知の焼付防止剤を塗布したガスセンサ10を、80℃、大気雰囲気に設定された密閉容器内に100時間放置させることで、焼付防止剤から有機ガス(未燃性物質)を発生させ、未燃性物質をガスセンサ10(第二測定室30)内に侵入させた状態を得た。検知対象ガスは、NOxが0ppm,O2が20%、H2Oが4%、残りはN2ガスである。検知対象ガスの温度は、150℃とした。図3では、横軸は起動タイミングからの経過時間(単位:秒)を表し、縦軸はNOx濃度対応値(単位:ppm)を表している。
2 第一酸素ポンプセル
4 第二酸素ポンプセル
5,105,150 制御部
10,110 ガスセンサ
12,13,14 固体電解質体
17,18,21,22,27,28 電極
23 第一測定室
30 第二測定室
40,70,140,170 コネクタ部
51 基準電圧比較回路
52 Ip1ドライブ回路
53 Vs検知回路
54 Icp供給回路
57 Vp2印加回路
58 定電流回路
60,142 マイクロコンピュータ
61 CPU
63 ROM
143 スイッチ回路
Claims (3)
- 検知対象ガスが導入される第一測定室と、第一固体電解質層と一対の第一電極とを備え、前記一対の第一電極が前記第一測定室の内側と外側とに設けられる第一酸素ポンプセルと、前記第一測定室に連通する第二測定室と、第二固体電解質層と一対の第二電極とを備え、前記一対の第二電極が前記第二測定室の内側と外側とに設けられた第二酸素ポンプセルとを備えるガスセンサと、
前記第一測定室に導入された前記検知対象ガスの酸素濃度を、前記第一酸素ポンプセルへの通電によって所定の値に調整する濃度制御を行うとともに、前記第二酸素ポンプセルへ操作電圧を印加する駆動制御を行う駆動回路部と、前記操作電圧が印加された前記第二酸素ポンプセルに流れる電流の大きさに基づいて特定ガスの濃度を表す濃度対応値を算出する算出手段とを備える制御部と
を備えるセンサ制御装置であって、
前記制御部はさらに、
前記ガスセンサが活性化したか否かを判断する判断手段と、
前記駆動制御を開始する前に、前記第二測定室内の酸素濃度を低下させる予備制御を実行する予備制御手段とを備え、
前記センサ制御装置はさらに、
前記判断手段によって前記ガスセンサが活性化したと判断された活性タイミングから一定の第一時間経過した経過タイミングから前記濃度制御を実行させる濃度制御指示手段と、
前記経過タイミングから前記駆動制御を開始する開始タイミングまでの間の少なくとも一部の期間に、前記予備制御手段に前記予備制御を実行させる予備制御指示手段と
を備えることを特徴とするセンサ制御装置。 - 前記予備制御手段は、前記第二酸素ポンプセルに対して、一定の電流を一定の第二時間供給して、前記第二測定室から当該第二測定室外部に汲み出す酸素量を一定に制御することによって前記予備制御を実行することを特徴とする請求項1に記載のセンサ制御装置。
- 前記第一時間は前記第二時間よりも短いことを特徴とする請求項2に記載のセンサ制御装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012157430A JP5815482B2 (ja) | 2012-07-13 | 2012-07-13 | センサ制御装置 |
DE102013011503.5A DE102013011503A1 (de) | 2012-07-13 | 2013-07-10 | Sensor-steuervorrichtung, sensor-steuerverfahren und computer-lesbares aufzeichnungsmedium |
US13/938,738 US9140202B2 (en) | 2012-07-13 | 2013-07-10 | Sensor control device, sensor control method and computer readable recording medium |
Applications Claiming Priority (1)
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---|---|---|---|
JP2012157430A JP5815482B2 (ja) | 2012-07-13 | 2012-07-13 | センサ制御装置 |
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JP2014020824A JP2014020824A (ja) | 2014-02-03 |
JP5815482B2 true JP5815482B2 (ja) | 2015-11-17 |
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Country Status (3)
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US (1) | US9140202B2 (ja) |
JP (1) | JP5815482B2 (ja) |
DE (1) | DE102013011503A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6923345B2 (ja) * | 2017-04-14 | 2021-08-18 | 日本特殊陶業株式会社 | センサ装置およびセンサユニット |
JP6421864B2 (ja) * | 2017-11-24 | 2018-11-14 | 株式会社デンソー | 排出ガスセンサのヒータ制御装置 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11307458A (ja) | 1998-04-23 | 1999-11-05 | Matsushita Electron Corp | 窒化物系化合物半導体の製造方法 |
JP4903895B2 (ja) * | 2009-12-02 | 2012-03-28 | 日本特殊陶業株式会社 | センサ制御装置及びセンサ制御装置の制御方法 |
-
2012
- 2012-07-13 JP JP2012157430A patent/JP5815482B2/ja active Active
-
2013
- 2013-07-10 US US13/938,738 patent/US9140202B2/en active Active
- 2013-07-10 DE DE102013011503.5A patent/DE102013011503A1/de active Pending
Also Published As
Publication number | Publication date |
---|---|
DE102013011503A1 (de) | 2014-01-16 |
US9140202B2 (en) | 2015-09-22 |
US20140014535A1 (en) | 2014-01-16 |
JP2014020824A (ja) | 2014-02-03 |
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