JP7057741B2 - ガスセンサの診断装置 - Google Patents
ガスセンサの診断装置 Download PDFInfo
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- JP7057741B2 JP7057741B2 JP2018174142A JP2018174142A JP7057741B2 JP 7057741 B2 JP7057741 B2 JP 7057741B2 JP 2018174142 A JP2018174142 A JP 2018174142A JP 2018174142 A JP2018174142 A JP 2018174142A JP 7057741 B2 JP7057741 B2 JP 7057741B2
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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
- G01N27/416—Systems
- G01N27/4163—Systems checking the operation of, or calibrating, the measuring apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
- G01N25/22—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures
- G01N25/44—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the heat developed being transferred to a fixed quantity of fluid
- G01N25/46—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the heat developed being transferred to a fixed quantity of fluid for investigating the composition of gas mixtures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/005—Investigating or analyzing materials by the use of thermal means by investigating specific heat
-
- 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
- G01N27/404—Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid, e.g. Clark-type oxygen sensors
- G01N27/4045—Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid, e.g. Clark-type oxygen sensors for gases other than oxygen
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/22—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators
- G01N31/223—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators for investigating presence of specific gases or aerosols
-
- 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
- G01N33/007—Arrangements to check the analyser
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
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- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Electrochemistry (AREA)
- Dispersion Chemistry (AREA)
- Biophysics (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Exhaust Gas After Treatment (AREA)
Description
本発明は、上記実施形態に限定されず、例えば以下のように実施してもよい。
Claims (5)
- 所定の活性温度域に加熱された状態で、被検出ガス雰囲気下に曝されて混成電位を出力するセンサ素子(31)を有する混成電位型のガスセンサ(30)の診断装置(40)であって、
前記センサ素子の温度を前記活性温度域の範囲外へ変化させる温度変化部と、
前記温度変化部による前記センサ素子の温度変化に伴い、前記混成電位が消失したことを判定する消失判定部と、
前記混成電位が消失したと判定した時の前記センサ素子の温度を取得する温度取得部と、
前記温度取得部により取得した温度に基づいて、前記センサ素子が劣化状態であるか否かを判定する劣化判定部とを備えるガスセンサの診断装置。 - 前記温度変化部は、前記センサ素子を加熱するヒータ(33)の制御により、前記センサ素子の温度を前記活性温度域よりも高い温度になるように変化させ、前記混成電位の消失を生じさせる請求項1に記載のガスセンサの診断装置。
- 前記温度変化部によって前記センサ素子を加熱させる際には、正常な前記センサ素子での前記混成電位の消失温度より高い加熱温度が設定されており、
前記劣化判定部は、前記加熱温度に至るまで前記混成電位の消失が判定されない場合には、前記センサ素子が劣化していると判定する請求項2に記載のガスセンサの診断装置。 - 前記ガスセンサは、アンモニアを検出対象とするアンモニアセンサであって、
前記被検出ガス中の酸素濃度が所定の高濃度状態になっているか判定する酸素濃度判定部を備えており、
前記劣化判定部は、前記酸素濃度判定部が、前記酸素濃度が所定の高濃度状態であると判定した場合に、前記センサ素子が劣化状態であるか否かを判定する請求項1から請求項3のいずれか1項に記載のガスセンサの診断装置。 - 前記ガスセンサは、アンモニアを検出対象とするアンモニアセンサであって、内燃機関(10)の排気通路(12)に設けられており、
前記排気通路には、アンモニアを還元剤として、排気中の窒素酸化物を還元する選択還元触媒(22)が設けられており、
前記劣化判定部は、前記内燃機関が燃料噴射を休止している期間に、前記センサ素子の劣化を判定する請求項1から請求項4のいずれか1項に記載のガスセンサの診断装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018174142A JP7057741B2 (ja) | 2018-09-18 | 2018-09-18 | ガスセンサの診断装置 |
DE102019122173.0A DE102019122173A1 (de) | 2018-09-18 | 2019-08-19 | Gassensor-Diagnosevorrichtung |
US16/572,676 US20200088665A1 (en) | 2018-09-18 | 2019-09-17 | Gas sensor diagnosis device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018174142A JP7057741B2 (ja) | 2018-09-18 | 2018-09-18 | ガスセンサの診断装置 |
Publications (2)
Publication Number | Publication Date |
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JP2020046267A JP2020046267A (ja) | 2020-03-26 |
JP7057741B2 true JP7057741B2 (ja) | 2022-04-20 |
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JP2018174142A Active JP7057741B2 (ja) | 2018-09-18 | 2018-09-18 | ガスセンサの診断装置 |
Country Status (3)
Country | Link |
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US (1) | US20200088665A1 (ja) |
JP (1) | JP7057741B2 (ja) |
DE (1) | DE102019122173A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102020214708B4 (de) | 2020-11-24 | 2022-09-29 | Vitesco Technologies GmbH | Verfahren zum Ermitteln eines Fehlers eines Abgassensors und Abgassensor |
US20230112942A1 (en) * | 2021-10-07 | 2023-04-13 | Ford Global Technologies, Llc | System and methods for adjusting nh3 sensor drift |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008032712A (ja) | 2006-07-25 | 2008-02-14 | Robert Bosch Gmbh | ガス混合物中の種々のガスを検出するための混成電位型センサおよび該センサによりガス混合物中の種々のガスを検出する方法 |
US20120006692A1 (en) | 2009-02-27 | 2012-01-12 | Robert Bosch Gmbh | Solid electrolyte gas sensor for measuring various gas species |
JP2016166757A (ja) | 2015-03-09 | 2016-09-15 | 本田技研工業株式会社 | Nh3センサの故障検知方法 |
JP2018054545A (ja) | 2016-09-30 | 2018-04-05 | 日本碍子株式会社 | ガスセンサ、触媒診断システム、および、触媒診断方法 |
Family Cites Families (1)
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JP6539197B2 (ja) | 2015-12-15 | 2019-07-03 | 日本碍子株式会社 | ガスセンサの診断方法 |
-
2018
- 2018-09-18 JP JP2018174142A patent/JP7057741B2/ja active Active
-
2019
- 2019-08-19 DE DE102019122173.0A patent/DE102019122173A1/de not_active Withdrawn
- 2019-09-17 US US16/572,676 patent/US20200088665A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008032712A (ja) | 2006-07-25 | 2008-02-14 | Robert Bosch Gmbh | ガス混合物中の種々のガスを検出するための混成電位型センサおよび該センサによりガス混合物中の種々のガスを検出する方法 |
US20120006692A1 (en) | 2009-02-27 | 2012-01-12 | Robert Bosch Gmbh | Solid electrolyte gas sensor for measuring various gas species |
JP2016166757A (ja) | 2015-03-09 | 2016-09-15 | 本田技研工業株式会社 | Nh3センサの故障検知方法 |
JP2018054545A (ja) | 2016-09-30 | 2018-04-05 | 日本碍子株式会社 | ガスセンサ、触媒診断システム、および、触媒診断方法 |
Also Published As
Publication number | Publication date |
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DE102019122173A9 (de) | 2020-05-07 |
DE102019122173A1 (de) | 2020-03-19 |
JP2020046267A (ja) | 2020-03-26 |
US20200088665A1 (en) | 2020-03-19 |
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