WO2006009196A1 - 排気浄化装置のNOx低減率測定方法 - Google Patents
排気浄化装置のNOx低減率測定方法 Download PDFInfo
- Publication number
- WO2006009196A1 WO2006009196A1 PCT/JP2005/013365 JP2005013365W WO2006009196A1 WO 2006009196 A1 WO2006009196 A1 WO 2006009196A1 JP 2005013365 W JP2005013365 W JP 2005013365W WO 2006009196 A1 WO2006009196 A1 WO 2006009196A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nox
- nox reduction
- exhaust
- exhaust emission
- reduction rate
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9495—Controlling the catalytic process
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
-
- 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
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus 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
-
- 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
- F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. by adjusting the dosing of reducing agent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—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
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- 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
- Y02T10/12—Improving ICE efficiencies
-
- 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
Definitions
- the present invention relates to a method for measuring a NOx reduction rate of an exhaust purification device.
- Nitrogen oxide (NOx) can selectively react with a reducing agent even in the presence of oxygen
- a selective reduction catalyst (NOx reduction catalyst) is incorporated into the exhaust path of a diesel engine for vehicles.
- NOx reduction catalyst is incorporated into the exhaust path of a diesel engine for vehicles.
- an exhaust purification device that uses urea water, which is easy to handle, as a reducing agent to reduce the NOx emission concentration (see, for example, Patent Documents 1 and 2).
- Such an exhaust purification device includes a nozzle (reducing agent addition means) for adding urea water to the upstream side of the NOx reduction catalyst, and in a state where the catalyst temperature exceeds about 200 ° C.
- a nozzle reducing agent addition means
- the urea water is decomposed into ammonia and carbon dioxide and then NOx contained in the exhaust is reduced by the NOx reduction catalyst and ammonia.
- surplus ammonia contributes to the reduction treatment of NOx after adsorbed on the NOx reduction catalyst.
- Patent Document 1 JP 2002-161732 A
- Patent Document 2 Japanese Translation of Special Publication 2002-513110
- the NOx concentration reduction ratio between the NOx concentration measurement value upstream of the reducing agent addition position and the NOx concentration measurement value downstream of the catalyst is obtained, and urea reduction is obtained from this reduction rate. It controls the amount of water consumed and the amount of urea water that should be added upstream of the NOx reduction catalyst.
- the present invention has been made in view of the above-described circumstances, and an object thereof is to make it possible to accurately measure the NOx reduction rate of an exhaust purification device.
- the present invention provides an exhaust purification system for reducing NOx in exhaust gas by adding a reducing agent to an upstream side of a NOx reduction catalyst incorporated in an engine exhaust path.
- This is a method for measuring the NOx reduction rate of the equipment, using a primary response model that depends on the exhaust flow rate and exhaust temperature, using the NOx concentration measurement value upstream of the reductant addition position and the NOx concentration measurement value downstream of the catalyst. And calculate the NOx reduction rate based on these NOx concentration correction values.
- the measured NOx concentration of the exhaust before addition of the reducing agent and the NOx are determined by a primary response model that depends on the exhaust flow rate and the exhaust temperature. Correct the measured NOx concentration after passing through the reduction catalyst.
- the amount of reducing agent to be added upstream of the NOx reduction catalyst can be appropriately managed from the NOx reduction rate, and the reducing agent can be saved.
- FIG. 1 is a conceptual diagram showing an example of an exhaust purification apparatus that is an object of the present invention.
- FIG. 2 is a block diagram of the arithmetic unit in FIG.
- FIG. 3 is a diagram showing changes in measured NOx values before correction.
- FIG. 4 is a diagram showing changes in measured NOx values after correction.
- FIGS. 1 to 4 show an embodiment of the present invention.
- a NOx reduction catalyst 6 incorporated in an exhaust path 5 through which exhaust G flows from an exhaust manifold 2 of a diesel engine 1 through a turbine 4 of a turbocharger 3.
- the temperature sensor 11 and the NOx concentration sensor 9 are further positioned upstream of the addition nozzle 7, and the temperature sensor 10 is positioned at the inlet of the NOx reduction catalyst 6.
- the NOx concentration sensor 12 is incorporated so as to be positioned at the NOx reduction catalyst 6 outlet.
- An air flow sensor 16 that detects the flow rate of air N is incorporated in the intake path 15 from the air cleaner 13 to the compressor 14 of the turbocharger 3.
- a pump 18 that sucks and sends urea water U stored in a tank 17 is connected to the addition nozzle 7 via a solenoid valve 19.
- the arithmetic unit 8 has an exhaust flow rate estimation function P, an upstream concentration correction function Q, a downstream concentration correction function NOx reduction rate calculation function V, and a reducing agent adsorption amount calculation function W.
- the exhaust flow rate estimation function P is a force configured to estimate the flow rate of exhaust G based on the engine speed and the fuel injection amount.
- the flow rate of air N obtained by the air flow sensor 16 (intake air amount)
- the temperature sensor 20 may be used to estimate the flow rate of the exhaust gas G based on the outside air temperature.
- the upstream concentration correction function Q is configured to correct the measured value of the NOx concentration sensor 9 with a primary response model based on the exhaust flow rate and the exhaust temperature obtained by the temperature sensor 10.
- the correction function R is based on the exhaust gas flow rate and the exhaust gas temperature obtained by the temperature sensor 11.
- the measurement value of the sensor 12 is configured to be corrected by the primary response model.
- Upstream concentration correction value Upstream concentration measurement (m— X) (A + Bs) / (1 + Cs)
- Downstream concentration correction value downstream concentration measurement value (n) (D + Es) / (1 + Fs)
- A, B, C, D, E, F, x are coefficients, s is Laplace operator
- Coefficients A, B, C, D, E, F, and x are all experimentally obtained.
- C and F are reaction rate components due to exhaust temperature
- X is a time delay component due to exhaust flow rate.
- the NOx reduction rate calculation function V is configured to calculate the NOx reduction rate based on the correction values of the NOx concentration sensors 9 and 12, and the reducing agent adsorption amount calculation function W is used to calculate the NOx reduction rate power NOx.
- the amount of urea water U that contributed to the reduction is calculated, and the amount of ammonia adsorbed on the NOx reduction catalyst 6 is determined based on this calculated value and the amount of urea water U added to the exhaust G from the addition nozzle 7. It is.
- the NOx reduction rate measuring method of the exhaust purification apparatus of the present invention is not limited to the above-described embodiments, and can of course be modified within the scope not departing from the gist of the present invention. .
- the NOx reduction rate measuring method of the exhaust purification apparatus of the present invention can be applied to various vehicle types.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE602005018088T DE602005018088D1 (de) | 2004-07-23 | 2005-07-21 | Verfahren zur messung der nox-reduktionsrate einer abgasentgiftungsvorrichtung |
| EP05766446A EP1801376B1 (en) | 2004-07-23 | 2005-07-21 | METHOD OF MEASURING NOx REDUCTION RATE OF EXHAUST EMISSION CONTROL DEVICE |
| KR1020077000774A KR20070032780A (ko) | 2004-07-23 | 2005-07-21 | 배기 정화 장치의 NOx 저감률 측정 방법 |
| US11/632,998 US7543443B2 (en) | 2004-07-23 | 2005-07-21 | Method for determining NOx reduction ratio in exhaust emission control device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004215767A JP4267535B2 (ja) | 2004-07-23 | 2004-07-23 | 排気浄化装置のNOx低減率測定方法 |
| JP2004-215767 | 2004-07-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006009196A1 true WO2006009196A1 (ja) | 2006-01-26 |
Family
ID=35785303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2005/013365 Ceased WO2006009196A1 (ja) | 2004-07-23 | 2005-07-21 | 排気浄化装置のNOx低減率測定方法 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US7543443B2 (ja) |
| EP (1) | EP1801376B1 (ja) |
| JP (1) | JP4267535B2 (ja) |
| KR (1) | KR20070032780A (ja) |
| CN (1) | CN1989321A (ja) |
| DE (1) | DE602005018088D1 (ja) |
| WO (1) | WO2006009196A1 (ja) |
Families Citing this family (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007009139A1 (de) * | 2005-07-19 | 2007-01-25 | Avl List Gmbh | Abgasstrang einer brennkraftmaschine |
| DE102005042488A1 (de) * | 2005-09-07 | 2007-03-08 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Brennkraftmaschine und Vorrichtung zur Durchführung des Verfahrens |
| WO2007098514A2 (de) * | 2006-03-02 | 2007-09-07 | Avl List Gmbh | Abgassystem für eine brennkraftmaschine |
| KR100957138B1 (ko) * | 2007-07-09 | 2010-05-11 | 현대자동차주식회사 | 질소산화물 센서 고장 판단 방법 및 이를 수행하는 선택적환원 촉매 시스템 |
| JP4840703B2 (ja) * | 2007-11-16 | 2011-12-21 | トヨタ自動車株式会社 | 排気浄化システムの異常診断装置 |
| JP2010071192A (ja) * | 2008-09-18 | 2010-04-02 | Toyota Motor Corp | 排気ガス浄化装置 |
| DE102008047860B3 (de) * | 2008-09-18 | 2009-12-24 | Continental Automotive Gmbh | Verfahren zur Dichtheitsprüfung eines Reagenzmittelinjektors |
| KR100992816B1 (ko) | 2008-11-28 | 2010-11-08 | 현대자동차주식회사 | 디젤차량에서 후처리 시스템의 암모니아 저장량 보정장치 및 방법 |
| FR2945962B1 (fr) * | 2009-05-29 | 2012-06-08 | Peugeot Citroen Automobiles Sa | Dispositif, vehicule comportant ce dispositif et procede de traitement des gaz d'echappement |
| DE102009058089B4 (de) * | 2009-12-12 | 2016-09-22 | Bayerische Motoren Werke Aktiengesellschaft | Mess- und Regelungsverfahren sowie Vorrichtung für ein SCR- Abgasnachbehandlungssystem mit Bestimmung des linearen Zusammenhangs zweier mittels NOx-Sensoren bestimmter Signale |
| CN101798946B (zh) * | 2010-02-23 | 2012-12-26 | 中国人民解放军军事交通学院 | 一种柴油机尿素溶液添加装置与方法 |
| DE102010027970A1 (de) * | 2010-04-20 | 2011-10-20 | Robert Bosch Gmbh | Verfahren zum Betreiben eines Verbrennungsmotors |
| GB2481433A (en) | 2010-06-24 | 2011-12-28 | Gm Global Tech Operations Inc | Determining NOx concentration upstream of an SCR catalyst |
| EP2439386A1 (en) * | 2010-10-06 | 2012-04-11 | Nicholas Michael Zayan | SCR ammonia slip detection |
| DE102011008380B3 (de) * | 2011-01-12 | 2012-01-26 | Continental Automotive Gmbh | Abgaskatalysatorsystem und Verfahren zum Betreiben eines Abgaskatalysators |
| SE538378C2 (sv) * | 2012-05-03 | 2016-06-07 | Scania Cv Ab | Metod för detektering av svavelförgiftning i ett avgasefterbehandlingssystem |
| JP6230459B2 (ja) * | 2014-03-28 | 2017-11-15 | 日立造船株式会社 | エンジンのための脱硝率の測定方法および測定装置 |
| JP6252540B2 (ja) * | 2014-05-19 | 2017-12-27 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
| US9476341B2 (en) * | 2014-07-28 | 2016-10-25 | GM Global Technology Operations LLC | Exhaust treatment system that generates debounce duration for NOx sensor offset |
| KR101684135B1 (ko) * | 2015-06-26 | 2016-12-08 | 현대자동차주식회사 | Scr 시스템의 고장진단방법 |
| CN105179052A (zh) * | 2015-07-13 | 2015-12-23 | 南通亚泰工程技术有限公司 | 一种船用scr尿素溶液喷射系统和控制方法 |
| DE102015224670A1 (de) * | 2015-12-09 | 2017-06-14 | Robert Bosch Gmbh | Verfahren zur Korrektur eines Modellwertes einer NOx-Konzentration |
| GB2550597B (en) | 2016-05-24 | 2020-05-13 | Delphi Automotive Systems Lux | Method of modelling afr to compensate for wraf sensor |
| CN108150300B (zh) * | 2017-12-21 | 2020-06-02 | 潍柴动力股份有限公司 | 一种柴油机NOx原排模型值的修正方法及装置 |
| CN113705890B (zh) * | 2021-08-27 | 2023-06-20 | 太原理工大学 | 一种基于近似模型的柴油机排放污染物控制方法 |
| CN114263521B (zh) * | 2021-12-31 | 2023-03-21 | 潍柴动力股份有限公司 | 一种传感器参数的修正方法及装置 |
| CN117685081B (zh) * | 2024-01-09 | 2025-11-21 | 潍柴动力股份有限公司 | 尿素喷射控制方法及装置、存储介质及电子设备 |
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2004
- 2004-07-23 JP JP2004215767A patent/JP4267535B2/ja not_active Expired - Fee Related
-
2005
- 2005-07-21 CN CNA200580024641XA patent/CN1989321A/zh active Pending
- 2005-07-21 EP EP05766446A patent/EP1801376B1/en not_active Expired - Lifetime
- 2005-07-21 DE DE602005018088T patent/DE602005018088D1/de not_active Expired - Lifetime
- 2005-07-21 KR KR1020077000774A patent/KR20070032780A/ko not_active Withdrawn
- 2005-07-21 WO PCT/JP2005/013365 patent/WO2006009196A1/ja not_active Ceased
- 2005-07-21 US US11/632,998 patent/US7543443B2/en not_active Expired - Fee Related
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| JPH0783073A (ja) * | 1993-09-13 | 1995-03-28 | Hitachi Ltd | ガスタービン設備の起動計画作成装置 |
| JPH11229850A (ja) * | 1998-02-13 | 1999-08-24 | Nissan Motor Co Ltd | ディーゼルエンジンの排気浄化装置 |
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Non-Patent Citations (1)
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Also Published As
| Publication number | Publication date |
|---|---|
| JP4267535B2 (ja) | 2009-05-27 |
| KR20070032780A (ko) | 2007-03-22 |
| CN1989321A (zh) | 2007-06-27 |
| US20070199307A1 (en) | 2007-08-30 |
| DE602005018088D1 (de) | 2010-01-14 |
| EP1801376B1 (en) | 2009-12-02 |
| EP1801376A4 (en) | 2008-01-16 |
| JP2006037771A (ja) | 2006-02-09 |
| US7543443B2 (en) | 2009-06-09 |
| EP1801376A1 (en) | 2007-06-27 |
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