WO2021162389A1 - 선택적 촉매 환원의 환원제 분사 제어 장치 및 방법 - Google Patents
선택적 촉매 환원의 환원제 분사 제어 장치 및 방법 Download PDFInfo
- Publication number
- WO2021162389A1 WO2021162389A1 PCT/KR2021/001668 KR2021001668W WO2021162389A1 WO 2021162389 A1 WO2021162389 A1 WO 2021162389A1 KR 2021001668 W KR2021001668 W KR 2021001668W WO 2021162389 A1 WO2021162389 A1 WO 2021162389A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- reducing agent
- injection amount
- correction value
- agent injection
- concentration
- Prior art date
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Classifications
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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]
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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
-
- 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
-
- 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
-
- 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
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating 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
- 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
- F01N2560/021—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting ammonia NH3
-
- 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
-
- 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
- F01N2610/1453—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
- F01N2900/0404—Methods of control or diagnosing using a data filter
-
- 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
Definitions
- the amount of NH 3 required in the SCR device is converted based on the urea water concentration sensor value to determine the urea water injection amount. have.
- This change in the concentration of urea may cause a change in the amount of NH 3 and thus deteriorate the NOx reduction efficiency of the SCR device. Therefore, a control logic capable of adjusting the urea water injection amount according to the changing urea water concentration sensor value is required.
- FIG. 3 is a block diagram showing an injection amount correction unit of the reducing agent injection amount control unit of FIG. 2 .
- the exhaust gas treatment system includes a reducing agent injection module 32 that injects a reducing agent for reducing nitrogen oxides in exhaust gas discharged from an engine (not shown). It may include a catalyst reduction (SCR) device 30 and a diesel oxidation catalyst (DOC) 20 installed in the exhaust pipe 10 in front of the SCR device 30 .
- the selective catalytic reduction (SCR) device 30 may include a reducing agent injection control device of the selective catalytic reduction for controlling the injection amount of the reducing agent injected from the reducing agent injection module 32 .
- the reducing agent injection control device determines the correction value of the reducing agent injection amount according to the reducing agent concentration sensor 50 and the measured reducing agent concentration for measuring the concentration of the reducing agent supplied to the reducing agent injection module 32, and having the determined correction value It may include a reducing agent injection amount control unit 100 for controlling the injection amount of the reducing agent injection module 32 to inject the reducing agent in the injection amount.
- the reducing agent injection amount control unit 100 receives the reducing agent concentration sensor value and the injection amount correction unit 110 for correcting the reducing agent injection amount according to the received reducing agent concentration sensor value and the corrected reducing agent It may include an output limiter 120 for outputting by limiting the injection amount within a preset range.
- the injection amount correction unit 110 is a correction value calculation unit 112 for calculating a correction value of the reducing agent injection amount according to the received reducing agent concentration sensor value, correction for filtering the injection amount correction value calculated from the correction value calculation unit 112 It may include a value filter unit 114 and an output determination unit 116 for outputting the calculated injection amount correction value under a preset temperature condition.
- correction value filter unit 116 output determination unit
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Description
Claims (12)
- 엔진 배기관에 설치되며 배기가스 내의 질소산화물을 환원시키기 위한 환원제를 분사하기 위한 환원제 분사 모듈;상기 환원제 분사 모듈로 공급되는 환원제의 농도를 측정하기 위한 환원제 농도 센서; 및상기 측정된 환원제 농도에 따라 환원제 분사량의 보정값을 결정하고 상기 결정된 보정값을 갖는 분사량으로 환원제를 분사하도록 상기 환원제 분사 모듈의 분사량을 제어하는 환원제 분사량 제어부를 포함하는 선택적 촉매 환원의 환원제 분사 제어 장치.
- 제 1 항에 있어서, 상기 환원제 분사량 제어부는, 상기 측정된 환원제 농도가 정상 농도보다 높으면 상기 환원제 분사량을 감소시키고 상기 측정된 환원제 농도가 정상 농도보다 낮으면 상기 환원제 분사량을 증가시키도록 제어하는 선택적 촉매 환원의 환원제 분사 제어 장치.
- 제 1 항에 있어서, 상기 환원제 분사량 제어부는환원제 농도 센서값을 수신하고 상기 수신된 환원제 농도 센서값에 따라 환원제 분사량을 보정하는 분사량 보정부; 및상기 보정된 환원제 분사량을 기 설정된 범위 내로 제한하여 출력하는 출력 제한부를 포함하는 선택적 촉매 환원의 환원제 분사 제어 장치.
- 제 3 항에 있어서, 상기 분사량 보정부는상기 수신된 환원제 농도 센서값에 따라 환원제 분사량의 보정값을 산출하는 보정값 산출부;상기 보정값 산출부로부터 산출된 분사량 보정값을 필터링하기 위한 보정값 필터부; 및기 설정된 온도 조건에서 상기 산출된 분사량 보정값을 출력하기 위한 출력 결정부를 포함하는 선택적 촉매 환원의 환원제 분사 제어 장치.
- 제 4 항에 있어서, 상기 출력 결정부는 엔진 냉각수의 온도, 작동유의 온도 및 상기 환원제의 온도 중 적어도 어느 하나가 기 설정된 온도 범위 이내에 있을 때 상기 분사량 보정값을 출력하는 선택적 촉매 환원의 환원제 분사 제어 장치.
- 제 3 항에 있어서, 상기 출력 제한부는 상기 환원제 분사량의 최대값 또는 최소값에 근거하여 상기 보정된 환원제 분사량을 제한하는 선택적 촉매 환원의 환원제 분사 제어 장치.
- 환원제 분사 모듈로 공급되는 환원제의 농도를 측정하고;상기 측정된 환원제의 농도에 따라 환원제 분사량의 보정값을 결정하고; 그리고상기 결정된 보정값으로 상기 환원제 분사량을 제어하는 것을 포함하는 선택적 촉매 환원의 환원제 분사 제어 방법.
- 제 7 항에 있어서, 상기 환원제 분사량의 보정값을 결정하는 것은, 상기 측정된 환원제의 농도가 정상 농도보다 높으면 상기 환원제 분사량을 감소시키고 상기 측정된 환원제의 농도가 정상 농도보다 낮으면 상기 환원제 분사량을 증가시키는 것을 포함하는 선택적 촉매 환원의 환원제 분사 제어 방법.
- 제 7 항에 있어서, 상기 환원제 분사량의 보정값을 결정하는 것은,환원제 농도 센서값에 따라 상기 환원제 분사량을 보정하고; 그리고상기 보정된 환원제 분사량을 기 설정된 범위 내로 제한하여 출력하는 것을 포함하는 선택적 촉매 환원의 환원제 분사 제어 방법.
- 제 9 항에 있어서, 상기 환원제 분사량을 보정하는 것은,상기 수신된 환원제 농도 센서값에 따라 환원제 분사량의 보정값을 산출하고;상기 산출된 분사량 보정값을 필터링하고; 그리고기 설정된 온도 조건에서 상기 산출된 분사량 보정값을 출력하는 것을 포함하는 선택적 촉매 환원의 환원제 분사 제어 방법.
- 제 10 항에 있어서, 상기 산출된 분사량 보정값을 출력하는 것은 엔진 냉각수의 온도, 작동유의 온도 및 상기 환원제의 온도 중 적어도 어느 하나가 기 설정된 온도 범위 이내에 있을 때 상기 분사량 보정값을 출력하는 것을 포함하는 선택적 촉매 환원의 환원제 분사 제어 방법.
- 제 9 항에 있어서, 상기 보정된 환원제 분사량을 기 설정된 범위 내로 제한하여 출력하는 것은 상기 환원제 분사량의 최대값 또는 최소값에 근거하여 상기 보정된 환원제 분사량을 제한하는 것을 포함하는 선택적 촉매 환원의 환원제 분사 제어 방법.
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KR1020227028079A KR20220121894A (ko) | 2020-02-13 | 2021-02-08 | 선택적 촉매 환원의 환원제 분사 제어 장치 및 방법 |
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KR20200017899 | 2020-02-13 | ||
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR19990063610A (ko) * | 1995-09-29 | 1999-07-26 | 피터 토마스 | 연소장치의 배기 가스 또는 공기 흐름내로 투입될 환원제량을측정하기 위한 방법 및 장치 |
JP2010059878A (ja) * | 2008-09-04 | 2010-03-18 | Toyota Motor Corp | 車載内燃機関の排気浄化装置 |
JP2012002122A (ja) * | 2010-06-16 | 2012-01-05 | Isuzu Motors Ltd | Scrシステム |
WO2016085307A1 (ko) * | 2014-11-27 | 2016-06-02 | 두산인프라코어 주식회사 | 요소 농도 측정 장치와 이를 구비하는 요소수 센더 및 요소수 탱크 |
KR101745247B1 (ko) * | 2016-02-17 | 2017-06-08 | 현대자동차주식회사 | 선제적 요소수 분사제어방법과 scr 시스템 및 차량 |
KR20180069408A (ko) * | 2016-12-15 | 2018-06-25 | 현대자동차주식회사 | Scr 정화 시스템 및 scr 정화 효율 개선 방법 |
-
2021
- 2021-02-08 KR KR1020227028079A patent/KR20220121894A/ko unknown
- 2021-02-08 WO PCT/KR2021/001668 patent/WO2021162389A1/ko active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR19990063610A (ko) * | 1995-09-29 | 1999-07-26 | 피터 토마스 | 연소장치의 배기 가스 또는 공기 흐름내로 투입될 환원제량을측정하기 위한 방법 및 장치 |
JP2010059878A (ja) * | 2008-09-04 | 2010-03-18 | Toyota Motor Corp | 車載内燃機関の排気浄化装置 |
JP2012002122A (ja) * | 2010-06-16 | 2012-01-05 | Isuzu Motors Ltd | Scrシステム |
WO2016085307A1 (ko) * | 2014-11-27 | 2016-06-02 | 두산인프라코어 주식회사 | 요소 농도 측정 장치와 이를 구비하는 요소수 센더 및 요소수 탱크 |
KR101745247B1 (ko) * | 2016-02-17 | 2017-06-08 | 현대자동차주식회사 | 선제적 요소수 분사제어방법과 scr 시스템 및 차량 |
KR20180069408A (ko) * | 2016-12-15 | 2018-06-25 | 현대자동차주식회사 | Scr 정화 시스템 및 scr 정화 효율 개선 방법 |
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