KR102443425B1 - Scr 시스템의 진단 방법 - Google Patents
Scr 시스템의 진단 방법 Download PDFInfo
- Publication number
- KR102443425B1 KR102443425B1 KR1020180028406A KR20180028406A KR102443425B1 KR 102443425 B1 KR102443425 B1 KR 102443425B1 KR 1020180028406 A KR1020180028406 A KR 1020180028406A KR 20180028406 A KR20180028406 A KR 20180028406A KR 102443425 B1 KR102443425 B1 KR 102443425B1
- Authority
- KR
- South Korea
- Prior art keywords
- scr system
- pressure
- reducing agent
- fault
- agent solution
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000003745 diagnosis Methods 0.000 title claims description 5
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 60
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 108
- 230000003197 catalytic effect Effects 0.000 claims description 42
- 230000006978 adaptation Effects 0.000 claims description 35
- 239000007789 gas Substances 0.000 claims description 17
- 238000011144 upstream manufacturing Methods 0.000 claims description 17
- 230000007547 defect Effects 0.000 claims description 16
- 238000004590 computer program Methods 0.000 claims description 8
- 238000002405 diagnostic procedure Methods 0.000 claims 2
- 238000001514 detection method Methods 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 43
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 14
- 238000002485 combustion reaction Methods 0.000 description 7
- 229910021529 ammonia Inorganic materials 0.000 description 6
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- WTHDKMILWLGDKL-UHFFFAOYSA-N urea;hydrate Chemical class O.NC(N)=O WTHDKMILWLGDKL-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- 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
- F01N3/20—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 specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- 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
- 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
- F01N3/20—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 specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/10—Testing internal-combustion engines by monitoring exhaust gases or combustion flame
- G01M15/102—Testing internal-combustion engines by monitoring exhaust gases or combustion flame by monitoring exhaust gases
-
- 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
- F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
- F01N2550/05—Systems for adding substances into exhaust
-
- 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
-
- 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
- F01N2560/14—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics having more than one sensor of one kind
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1433—Pumps
- F01N2610/144—Control thereof
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
- F01N2610/146—Control thereof, e.g. control of injectors or injection valves
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/04—Methods of control or diagnosing
-
- 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
- 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
- F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
- F01N2900/1806—Properties of reducing agent or dosing system
- F01N2900/1808—Pressure
-
- 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
- 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
- F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
- F01N2900/1806—Properties of reducing agent or dosing system
- F01N2900/1818—Concentration of the reducing agent
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
도 2는 체적 모드의 경우 도 1의 SCR 시스템의 압력을 시간에 걸쳐 나타낸 그래프이다.
도 3은 본 발명에 따른 방법의 제1 실시예를 나타낸 흐름도이다.
도 4는 본 발명에 따른 방법의 제2 실시예를 나타낸 흐름도이다.
도 5는 본 발명에 따른 방법의 일 실시예에 따라서 압력 제어 모드의 경우 도 1의 SCR 시스템의 압력 및 환원제 용액의 질량 편차를 각각 시간에 걸쳐 나타낸 그래프들이다.
Claims (10)
- 이송 펌프(11)와 계량 밸브(15)를 포함하는 SCR 시스템(1)의 진단 방법에 있어서,
- SCR 시스템(1)에서 압력 결함을 판단하는 단계(200)와;
- SCR 시스템(1)의 압력 제어 모드(DM)를 설정하는 단계와;
- 환원제 용액의 질량 편차(Δm)를 검출하는 단계와;
- 질량 편차(Δm)가 제1 임계값(S1)을 상회한다면, 이송 펌프(11)에 대한 결함을 출력하는 단계(221; 242)와;
- 상기 질량 편차(Δm)가 제1 임계값(S1)을 하회하거나 그와 같다면, 계량 밸브(15)에 대한 결함을 출력하는 단계(222; 244)를 포함하는, SCR 시스템의 진단 방법. - 제1항에 있어서, SCR 시스템에서 압력 결함이 판단(200)된 후에, SCR 시스템(1)의 결함 내재 모드(FM)의 설정(201)이 수행되는 것을 특징으로 하는, SCR 시스템의 진단 방법.
- 제2항에 있어서, 결함 내재 모드(FM)의 설정(201) 시, SCR 시스템(1)의 결함 내재 모드(FM)를 신호로 안내하는 엔진 점검등이 활성화되는(202) 것을 특징으로 하는, SCR 시스템의 진단 방법.
- 제1항 내지 제3항 중 어느 한 항에 있어서, 압력 제어 모드(DM)의 설정은 계량 밸브(15)의 개방 기간의 변경(205)을 통해 실현되는 것을 특징으로 하는, SCR 시스템의 진단 방법.
- 제1항 내지 제3항 중 어느 한 항에 있어서, 압력 제어 모드의 설정은 이송 펌프의 제어의 변경을 통해 실현되는 것을 특징으로 하는, SCR 시스템의 진단 방법.
- 제1항 내지 제3항 중 어느 한 항에 있어서, 환원제 용액의 질량 편차(Δm)를 검출하기 위해,
- SCR 시스템(1)의 SCR 촉매 컨버터(2)를 완전하게 배출하는 단계(210);
- SCR 촉매 컨버터(2)의 상류에서 아화학량론적 비율(α)로 환원제 용액의 적어도 하나의 설정 질량 유량()을 계량 공급하는 단계(211);
- SCR 촉매 컨버터(2) 하류의 질소산화물 농도(NOxN) 및 SCR 촉매 컨버터(2) 상류의 질소산화물 농도(NOxV)를 검출하는 단계(212, 213);
- 아화학량론적 비율(α) 및 총 배기가스 질량 유량()이 고려되는 조건에서, SCR 촉매 컨버터(2) 하류의 질소산화물 농도(NOxN)와 SCR 촉매 컨버터(2) 상류의 질소산화물 농도(NOxV)의 차를 통해 환원제 용액의 실제 질량 유량()을 계산하는 단계(214); 및
- 질량 편차(Δm)를 산출하기 위해 설정 질량 유량()과 실제 질량 유량()을 비교하는 단계(215);가 실행되는 것을 특징으로 하는, SCR 시스템의 진단 방법. - 제1항 내지 제3항 중 어느 한 항에 있어서, 환원제 용액의 질량 편차(Δm)를 검출하기 위해,
- 압력 제어 모드(DM)가 설정되기 전에 적응 인수(a)를 검출하는 단계(230);
- 공칭 적응 인수(aA)로서 적응 인수(a)를 저장하는 단계(231);
- 압력 제어 모드(DM)가 설정된 후에 적응 인수(a)를 재설정하는 단계(232);
- 학습 시간(tL)에 걸쳐 압력 제어 모드(DM) 동안 신규 적응 인수(aN)를 학습하는 단계(234); 및
- 양 편차(Δm)를 산출하기 위해, 공칭 적응 인수(aA)와 신규 적응 인수(aN)를 비교하는 단계(235);가 실행되는 것을 특징으로 하는, SCR 시스템의 진단 방법. - 기계 판독 가능한 저장 매체에 저장되어 있고 제1항 내지 제3항 중 어느 한 항에 따르는 방법의 각각의 단계를 실행하도록 구성되는 컴퓨터 프로그램.
- 제8항에 따르는 컴퓨터 프로그램이 저장되어 있는 기계 판독 가능 저장 매체.
- 제1항 내지 제3항 중 어느 한 항에 따르는 방법을 이용하여 SCR 시스템(1)의 진단을 실행하도록 구성되는 전자 제어 장치(5).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017204300.8A DE102017204300A1 (de) | 2017-03-15 | 2017-03-15 | Verfahren zur Diagnose eines SCR-Systems |
DE102017204300.8 | 2017-03-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20180105574A KR20180105574A (ko) | 2018-09-28 |
KR102443425B1 true KR102443425B1 (ko) | 2022-09-15 |
Family
ID=63372537
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020180028406A Active KR102443425B1 (ko) | 2017-03-15 | 2018-03-12 | Scr 시스템의 진단 방법 |
Country Status (2)
Country | Link |
---|---|
KR (1) | KR102443425B1 (ko) |
DE (1) | DE102017204300A1 (ko) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019216312A1 (de) * | 2019-10-23 | 2021-04-29 | Robert Bosch Gmbh | Vorhersage und/oder Beurteilung der Emissionsmenge von Substanzen im Abgas von Brennkraftmaschinen |
CN111173603B (zh) * | 2020-01-19 | 2022-06-21 | 无锡威孚力达催化净化器有限责任公司 | 一种尿素消耗量的监测方法、装置及系统 |
CN113250797B (zh) * | 2021-04-29 | 2022-07-15 | 广西玉柴机器股份有限公司 | 一种尿素溶液消耗量偏差过程的诊断方法及装置 |
CN114323692B (zh) * | 2021-12-29 | 2024-06-07 | 无锡伟博汽车科技有限公司 | 一种scr效率低故障诊断方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100212417A1 (en) | 2009-02-24 | 2010-08-26 | Gm Global Technology Operations, Inc. | Exhaust treatment diagnostic system and method |
US20130283771A1 (en) | 2010-12-28 | 2013-10-31 | Bosch Corporation | Reducing agent supply apparatus abnormality diagnosis unit and reducing agent supply apparatus |
JP2014129764A (ja) | 2012-12-28 | 2014-07-10 | Isuzu Motors Ltd | 尿素scr用尿素水消費量診断装置 |
KR101697445B1 (ko) | 2012-08-14 | 2017-01-17 | 콘티넨탈 에미텍 페어발퉁스 게엠베하 | 계량 장치의 동작 방법 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008005988B4 (de) | 2008-01-24 | 2017-05-11 | Robert Bosch Gmbh | Verfahren zur Diagnose einer Abgasnachbehandlungsvorrichtung und Vorrichtung zur Durchführung des Verfahrens |
DE102010002620A1 (de) | 2010-03-05 | 2011-09-08 | Robert Bosch Gmbh | Verfahren zum Betreiben eines SCR-Katalysators |
-
2017
- 2017-03-15 DE DE102017204300.8A patent/DE102017204300A1/de active Pending
-
2018
- 2018-03-12 KR KR1020180028406A patent/KR102443425B1/ko active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100212417A1 (en) | 2009-02-24 | 2010-08-26 | Gm Global Technology Operations, Inc. | Exhaust treatment diagnostic system and method |
US20130283771A1 (en) | 2010-12-28 | 2013-10-31 | Bosch Corporation | Reducing agent supply apparatus abnormality diagnosis unit and reducing agent supply apparatus |
KR101697445B1 (ko) | 2012-08-14 | 2017-01-17 | 콘티넨탈 에미텍 페어발퉁스 게엠베하 | 계량 장치의 동작 방법 |
JP2014129764A (ja) | 2012-12-28 | 2014-07-10 | Isuzu Motors Ltd | 尿素scr用尿素水消費量診断装置 |
Also Published As
Publication number | Publication date |
---|---|
KR20180105574A (ko) | 2018-09-28 |
DE102017204300A1 (de) | 2018-09-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10077700B2 (en) | Method for checking the plausibility of a NOx sensor in an SCR catalytic converter system | |
US11346267B2 (en) | Operating an exhaust gas aftertreatment system of an internal combustion engine and an exhaust gas aftertreatment system | |
KR102443425B1 (ko) | Scr 시스템의 진단 방법 | |
US8561387B2 (en) | Method for checking the seal of a reagent injector | |
CN112112716B (zh) | 一种scr系统尿素溶液浓度异常的诊断方法 | |
EP2778361B1 (en) | Apparatus, method, and system for diagnosing reductant delivery performance | |
EP3255257B1 (en) | Internal combustion engine and exhaust-gas-component estimating method | |
EP2187009B1 (en) | Method for operating an exhaust gas treatment system | |
JP3552653B2 (ja) | 内燃機関の還元剤供給装置の診断処理装置 | |
KR102089817B1 (ko) | 차량용 배기 가스 후처리 시스템에서 유압 누출-방지성을 검사하기 위한 방법 및 장치 | |
WO2014115619A1 (ja) | 尿素scr用尿素水消費量診断装置 | |
CN104343512A (zh) | 用于确定排气净化装置的效率的方法和设备 | |
JP6127509B2 (ja) | 尿素scr用尿素水消費量診断装置 | |
JP2014129766A (ja) | 尿素scr用尿素水消費量診断装置 | |
CN110778385B (zh) | 在线检测尿素喷射系统泄露的方法及检测装置 | |
CN108716430B (zh) | 用于监控机动车的内燃机的流体式的计量系统的计量阀的体积流量的方法 | |
KR20180110603A (ko) | 유체 계량공급 시스템에서 양 편차 결정 방법 | |
CN103557063A (zh) | 一种尿素喷射系统失效的检测方法及装置 | |
JPH1172045A (ja) | 内燃機関の排気ガス再循環装置の診断方法 | |
KR102557632B1 (ko) | Scr 촉매 컨버터 시스템 및 그 진단 방법 | |
US11536182B2 (en) | Method and processing unit for ascertaining a catalytic converter state | |
US9938876B2 (en) | Abnormality diagnosis device for exhaust gas purification apparatus in internal combustion engine | |
KR102652182B1 (ko) | 2개 이상의 계량공급 밸브를 포함하는 scr 시스템의 점검 방법 | |
KR102605103B1 (ko) | 2개 이상의 계량공급 밸브를 포함하는 scr 시스템의 점검 방법 | |
CN112262253B (zh) | 注入到机动车辆排出气体处理系统中的液体添加剂的流量的动态监测 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PA0109 | Patent application |
Patent event code: PA01091R01D Comment text: Patent Application Patent event date: 20180312 |
|
PG1501 | Laying open of application | ||
A201 | Request for examination | ||
PA0201 | Request for examination |
Patent event code: PA02012R01D Patent event date: 20210302 Comment text: Request for Examination of Application Patent event code: PA02011R01I Patent event date: 20180312 Comment text: Patent Application |
|
E701 | Decision to grant or registration of patent right | ||
PE0701 | Decision of registration |
Patent event code: PE07011S01D Comment text: Decision to Grant Registration Patent event date: 20220818 |
|
PR0701 | Registration of establishment |
Comment text: Registration of Establishment Patent event date: 20220908 Patent event code: PR07011E01D |
|
PR1002 | Payment of registration fee |
Payment date: 20220913 End annual number: 3 Start annual number: 1 |
|
PG1601 | Publication of registration |