KR20090079973A - NOx 센서의 고장 진단 장치 및 고장 진단 방법 - Google Patents
NOx 센서의 고장 진단 장치 및 고장 진단 방법 Download PDFInfo
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- KR20090079973A KR20090079973A KR1020097011362A KR20097011362A KR20090079973A KR 20090079973 A KR20090079973 A KR 20090079973A KR 1020097011362 A KR1020097011362 A KR 1020097011362A KR 20097011362 A KR20097011362 A KR 20097011362A KR 20090079973 A KR20090079973 A KR 20090079973A
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- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
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- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
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- 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
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- 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
- F02D41/1461—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 of the exhaust gases emitted by the engine
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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
- F02D41/1461—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 of the exhaust gases emitted by the engine
- F02D41/1462—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 of the exhaust gases emitted by the engine with determination means using an estimation
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- 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
- F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
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- 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
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- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- 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
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Abstract
Description
Claims (9)
- 내연 기관의 배기 통로 중에 구비되고, 상기 배기 통로 중을 통과하는 배기 가스 중의 NOX 농도를 검출하기 위한 NOX 센서의 고장 진단 장치에 있어서,단위 시간당에 상기 내연 기관으로부터 배출되는 배출 NOX 유량을 연산하여 기억하기 위한 배출 NOX 유량 연산 기억 수단과,상기 NOX 센서에 의해서 검출되는 검출 NOX 농도를 기억하기 위한 검출 NOX 농도 기억 수단과,상기 배출 NOX 유량의 경시 변화의 기준으로서의 기준 패턴 및 상기 NOX 센서에 의해서 검출되는 검출 NOX 농도의 경시 변화의 기준으로서의 추종 패턴이 규정되고, 상기 내연 기관이 통상 운전 모드에 있는 경우에 상기 배출 NOX 유량이 상기 기준 패턴에 대하여 소정의 관계를 갖고 추이하였을 때에, 상기 검출 NOX 농도가 상기 추종 패턴에 대하여 소정의 관계를 갖고 추이하였는지의 여부를 판별함으로써, 상기 NOX 센서의 응답성을 판정하는 고장 판정 수단을 구비하는 것을 특징으로 하는 NOX 센서의 고장 진단 장치.
- 제 1 항에 있어서, 상기 기준 패턴은, 소정의 제 1 기준치가 일정 시간 계속 되는 정상 영역과 소정의 증가율로 증가하는 경사 영역을 포함하는 패턴이고,상기 추종 패턴은, 소정의 증가율로 증가하는 추종 경사 영역을 포함하는 패턴이고,상기 고장 판정 수단은, 상기 배출 NOX 유량이 상기 기준 패턴의 상기 경사 영역의 값을 하회하지 않도록 추이하였을 때에, 상기 검출 NOX 농도가 상기 추종 패턴의 상기 추종 경사 영역의 값을 하회하지 않도록 추이하였는지의 여부를 판별하는 것을 특징으로 하는 NOX 센서의 고장 진단 장치.
- 제 2 항에 있어서, 상기 고장 판정 수단은, 상기 배출 NOX 유량이 상기 소정의 기준치를 상회하지 않도록 상기 일정 시간 이상 추이한 후, 상기 소정의 기준치의 값에 도달하였을 때에 판정 모드로 이행하는 것을 특징으로 하는 NOX 센서의 고장 진단 장치.
- 제 3 항에 있어서, 상기 고장 판정 수단은, 상기 판정 모드 이행 시의 상기 검출 NOX 농도의 값을, 상기 추종 패턴의 상기 추종 경사 영역의 초기치로 하는 것을 특징으로 하는 NOX 센서의 고장 진단 장치.
- 제 3 항 또는 제 4 항에 있어서, 상기 고장 판정 수단은, 상기 배출 NOX 유 량이 상기 소정의 기준치를 초과한 후, 상기 기준 패턴의 상기 경사 영역의 값을 하회하였을 때에, 상기 판정 모드를 중지하는 것을 특징으로 하는 NOX 센서의 고장 진단 장치.
- 제 2 항 내지 제 4 항 중 어느 한 항에 있어서, 상기 기준 패턴은, 상기 정상 영역과 상기 경사 영역의 사이에, 상기 경사 영역의 개시 위치를 소정 시간 늦추는 지연 영역을 갖는 것을 특징으로 하는 NOX 센서의 고장 진단 장치.
- 제 2 항 내지 제 4 항 중 어느 한 항에 있어서, 상기 기준 패턴은, 상기 경사 영역의 뒤에 상기 제 1 기준치보다도 큰 제 2 기준치가 일정 시간 계속되는 후단 정상 영역을 포함하고,상기 추종 패턴은, 상기 추종 경사 영역의 뒤에 제 3 기준치가 일정 시간 계속하는 후단 추종 정상 영역을 포함하고,상기 고장 판정 수단은, 상기 배출 NOX 유량이 상기 규준 패턴의 상기 경사 영역의 값 및 상기 후단 정상 영역의 값을 하회하지 않도록 추이하였을 때에, 상기 검출 NOX 농도가 상기 추종 패턴의 상기 추종 경사 영역의 값 및 상기 후단 추종 정상 영역의 값을 하회하지 않도록 추이하였는지의 여부를 판별하는 것을 특징으로 하는 NOX 센서의 고장 진단 장치.
- 제 2 항 내지 제 4 항 중 어느 한 항에 있어서, 상기 고장 판정 수단은, 또한, 상기 검출 NOX 농도가, 상기 배출 NOX 유량이 상기 제 1 기준치를 초과하였을 때의 값에 대하여 소정치 이상의 증가하지 않는 상태에서 소정 시간 경과하였는지의 여부를 판별함으로써, NOX 센서의 고착 상태를 판정하는 것을 특징으로 하는 NOX 센서의 고장 진단 장치.
- 내연 기관의 배기 통로 중에 구비되고, 상기 배기 통로 중을 통과하는 배기 가스 중의 NOX 농도를 검출하기 위한 NOX 센서의 고장 진단 방법에 있어서,상기 내연 기관으로부터 배출되는 배출 NOX 유량의 경시 변화의 기준으로서의 기준 패턴과, 상기 NOX 센서에 의해서 검출되는 검출 NOX 농도의 경시 변화의 기준으로서의 추종 패턴을 미리 설정하고,상기 배출 NOX 유량이 상기 기준 패턴에 대하여 소정의 관계를 갖고 추이하였을 때에, 상기 검출 NOX 농도가 상기 추종 패턴에 대하여 소정의 관계를 갖고 추이하였는지의 여부를 판별함으로써, 상기 NOX 센서의 응답성을 판정하는 것을 특징으로 하는 NOX 센서의 고장 진단 방법.
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JPJP-P-2007-024213 | 2007-02-02 | ||
JP2007024213A JP4297379B2 (ja) | 2007-02-02 | 2007-02-02 | Noxセンサの故障診断装置及び故障診断方法 |
PCT/JP2008/051059 WO2008093607A1 (ja) | 2007-02-02 | 2008-01-25 | Noxセンサの故障診断装置及び故障診断方法 |
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KR20090079973A true KR20090079973A (ko) | 2009-07-22 |
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EP (1) | EP2128396B1 (ko) |
JP (1) | JP4297379B2 (ko) |
KR (1) | KR101088316B1 (ko) |
CN (1) | CN101600863B (ko) |
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US9664089B2 (en) | 2014-12-03 | 2017-05-30 | Hyundai Motor Company | Fault diagnosis method of SCR system and an apparatus thereof |
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DE102007006489B4 (de) * | 2007-02-09 | 2018-10-04 | Robert Bosch Gmbh | Verfahren zur Diagnose eines in einem Abgasbereich einer Brennkraftmaschine angeordneten Abgassensors und Vorrichtung zur Durchführung des Verfahrens |
JP5152912B2 (ja) * | 2008-06-27 | 2013-02-27 | ボッシュ株式会社 | タンク内センサの合理性診断方法及び合理性診断装置 |
JP2010101860A (ja) * | 2008-10-27 | 2010-05-06 | Mitsubishi Motors Corp | 車両に搭載された機構の故障診断装置 |
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KR101088316B1 (ko) | 2011-12-01 |
JP2008190383A (ja) | 2008-08-21 |
EP2128396B1 (en) | 2011-08-24 |
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US20100031633A1 (en) | 2010-02-11 |
EP2128396A1 (en) | 2009-12-02 |
CN101600863A (zh) | 2009-12-09 |
ATE521796T1 (de) | 2011-09-15 |
US8359826B2 (en) | 2013-01-29 |
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