KR20030078622A - 내연 기관의 NOx 정화 장치 - Google Patents
내연 기관의 NOx 정화 장치 Download PDFInfo
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- KR20030078622A KR20030078622A KR1020020081065A KR20020081065A KR20030078622A KR 20030078622 A KR20030078622 A KR 20030078622A KR 1020020081065 A KR1020020081065 A KR 1020020081065A KR 20020081065 A KR20020081065 A KR 20020081065A KR 20030078622 A KR20030078622 A KR 20030078622A
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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
- 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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- 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
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- 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
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- B01D53/34—Chemical or biological purification of waste gases
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- B01D53/9495—Controlling the catalytic process
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- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/008—Mounting or arrangement of exhaust sensors in or on exhaust apparatus
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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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
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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
- F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
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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
- 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
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- 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
- B01D2251/2062—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
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- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
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- 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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- 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
- F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
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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
- F01N2560/14—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics having more than one sensor of one kind
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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
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/14—Nitrogen oxides
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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
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/18—Ammonia
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F01N2610/00—Adding substances to exhaust gases
- F01N2610/08—Adding substances to exhaust gases with prior mixing of the substances with a gas, e.g. air
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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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- F01N2900/1621—Catalyst conversion efficiency
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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
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1622—Catalyst reducing agent absorption capacity or consumption amount
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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
- 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
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
Description
Claims (7)
- 내연 기관의 NOx 정화 장치에 있어서,내연 기관의 배기계에 설치되어 환원제를 흡착하여 배기 가스 속의 NOx를 선택 환원하는 NOx 촉매(17)와,상기 NOx 촉매(17)에 상기 환원제를 공급하는 환원제 공급 수단(29)과,상기 내연 기관으로부터 배출되는 NOx 배출량을 검출 또는 추정하는 NOx 배출량 도출 수단(41)과,상기 NOx 촉매(17)에 의한 실제 NOx 정화율을 도출하는 실제 NOx 정화율 도출 수단(42)과,상기 NOx 배출량 도출 수단(41)에 의해 검출 또는 추정된 NOx 배출량과 상기 실제 NOx 정화율 도출 수단(42)에 의해 도출된 실제 NOx 정화율에 의거하여 상기 NOx 촉매(17)에 흡착된 상기 환원제의 소비량을 도출하는 소비량 도출 수단(43)과,상기 소비량 도출 수단(43)에 의해 도출된 상기 환원제의 소비량 및 상기 환원제 공급 수단(29)에 의한 상기 환원제의 첨가량에 따라서, 상기 NOx 촉매(17)에 흡착된 상기 환원제의 실제 흡착량을 도출하는 흡착량 도출 수단(45)과,상기 흡착량 도출 수단(45)에 의해 도출된 실제 흡착량에 따라서 상기 환원제 공급 수단(29)을 제어하는 제어 수단(46)을 포함하는 것을 특징으로 하는 내연 기관의 NOx 정화 장치.
- 제1항에 있어서, 상기 환원제 공급 수단(29)에 의해 공급되는 환원제는 암모니아 또는 요소수인 것을특징으로 하는 내연 기관의 NOx 정화 장치.
- 제1항에 있어서, 실제 NOx 정화율 도출 수단(42)은 상기 NOx 촉매(17)의 상류측 배기계에 설치된 전방 NOx 센서(19)에 의해 검출된 상류측 NOx 농도와, 상기 NOx 촉매(17)의 하류측의 배기계에 설치된 후방 NOx 센서(26)에 의해 검출된 하류측 NOx 농도와의 차 또는 비로부터 실제 NOx 정화율을 도출하는 것을 특징으로 하는 내연 기관의 NOx 정화 장치.
- 제1항에 있어서, 상기 NOx 촉매(17)에 대한 상기 환원제의 목표 흡착량을 상기 NOx 촉매(17)의 촉매 온도 또는 촉매 온도에 상관하는 변수에 따라서 설정되는 목표 흡착량 설정 수단(47)을 구비하고,상기 제어 수단(46)은 상기 흡착량 도출 수단(45)에 의해 도출된 실제 흡착량과 상기 목표 흡착량 설정 수단(47)에 의해 설정된 목표 흡착량과의 비교 결과에 따라서, 상기 환원제 공급 수단(29)을 제어하는 것을 특징으로 하는 내연 기관의 NOx 정화 장치.
- 제1항에 있어서, 상기 흡착량 도출 수단(45)에 의해 도출된 실제 흡착량과, 상기 NOx 촉매(17)의 촉매 온도 또는 촉매 온도에 상관하는 변수에 의거하여 기준 NOx 정화율을 도출하는 기준 NOx 정화율 도출 수단(52)과,상기 기준 NOx 정화율 도출 수단(52)에 의해 도출된 기준 NOx 정화율 및 상기 실제 NOx 정화율 도출 수단(42)에 의해 도출된 실제 NOx 정화율과의 비교 결과에 따라서, 상기 흡착량 도출 수단(45)에 의해 도출된 실제 흡착량을 보정하는 보정 수단(51)을 구비하고,상기 제어 수단(46)은 상기 보정 수단(51)에 의해 보정된 실제 흡착량에 따라서, 상기 환원제 공급 수단(29)을 제어하는 것을 특징으로 하는 내연 기관의 NOx 정화 장치.
- 제1항에 있어서, 상기 흡착량 도출 수단(45)은 상기 환원제 공급 수단(29)에 의한 상기 환원제 첨가량과 상기 소비량 도출 수단(43)에 의해 도출된 상기 환원제 소비량과의 차와, 상기 흡착량 도출 수단(45)에 의한 전회의 흡착량 도출치와의 합으로부터, 상기 NOx 촉매(17)에 흡착된 상기 환원제의 실제 흡착량을 도출하는 것을 특징으로 하는 내연 기관의 NOx 정화 장치.
- 제2항에 있어서, 상기 제어 수단(46)은 상기 실제 흡착량이 상기 NOx 촉매(17)에서 암모니아 슬립이 발생하지 않는 한계량 근방이 되도록, 상기 환원제 공급 수단(29)을 제어하는 것을 특징으로 하는 내연 기관의 NOx 정화 장치.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002095987A JP3951774B2 (ja) | 2002-03-29 | 2002-03-29 | 内燃機関のNОx浄化装置 |
JPJP-P-2002-00095987 | 2002-03-29 |
Publications (2)
Publication Number | Publication Date |
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KR20030078622A true KR20030078622A (ko) | 2003-10-08 |
KR100490813B1 KR100490813B1 (ko) | 2005-05-24 |
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Application Number | Title | Priority Date | Filing Date |
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KR10-2002-0081065A KR100490813B1 (ko) | 2002-03-29 | 2002-12-18 | 내연 기관의 NOx 정화 장치 |
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Country | Link |
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US (1) | US6755014B2 (ko) |
EP (1) | EP1348477B1 (ko) |
JP (1) | JP3951774B2 (ko) |
KR (1) | KR100490813B1 (ko) |
CN (1) | CN1267627C (ko) |
DE (1) | DE60203781T2 (ko) |
Cited By (1)
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KR101500350B1 (ko) * | 2009-12-03 | 2015-03-09 | 현대자동차 주식회사 | NOx 센서 미작동 구간에서의 암모니아 분사 방법 |
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2002
- 2002-03-29 JP JP2002095987A patent/JP3951774B2/ja not_active Expired - Lifetime
- 2002-12-18 KR KR10-2002-0081065A patent/KR100490813B1/ko active IP Right Grant
- 2002-12-20 EP EP02028721A patent/EP1348477B1/en not_active Expired - Lifetime
- 2002-12-20 DE DE60203781T patent/DE60203781T2/de not_active Expired - Lifetime
- 2002-12-27 US US10/329,705 patent/US6755014B2/en not_active Expired - Lifetime
- 2002-12-27 CN CNB021590672A patent/CN1267627C/zh not_active Expired - Lifetime
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KR101500350B1 (ko) * | 2009-12-03 | 2015-03-09 | 현대자동차 주식회사 | NOx 센서 미작동 구간에서의 암모니아 분사 방법 |
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KR100490813B1 (ko) | 2005-05-24 |
US6755014B2 (en) | 2004-06-29 |
DE60203781T2 (de) | 2005-09-29 |
CN1267627C (zh) | 2006-08-02 |
US20030182935A1 (en) | 2003-10-02 |
EP1348477A1 (en) | 2003-10-01 |
EP1348477B1 (en) | 2005-04-20 |
DE60203781D1 (de) | 2005-05-25 |
JP3951774B2 (ja) | 2007-08-01 |
CN1448620A (zh) | 2003-10-15 |
JP2003293737A (ja) | 2003-10-15 |
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