WO2021162389A1 - Appareil et procédé de régulation de l'injection de réducteur pour une réduction catalytique sélective - Google Patents

Appareil et procédé de régulation de l'injection de réducteur pour une réduction catalytique sélective Download PDF

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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
Application number
PCT/KR2021/001668
Other languages
English (en)
Korean (ko)
Inventor
유진환
Original Assignee
두산인프라코어 주식회사
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 두산인프라코어 주식회사 filed Critical 두산인프라코어 주식회사
Priority to KR1020227028079A priority Critical patent/KR20220121894A/ko
Publication of WO2021162389A1 publication Critical patent/WO2021162389A1/fr

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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
    • 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
    • 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

L'invention concerne un appareil de régulation de l'injection d'un réducteur pour une réduction catalytique sélective. Ledit appareil comprend : un module d'injection de réducteur qui est installé dans un tuyau d'échappement de moteur et qui injecte un réducteur pour réduire les oxydes d'azote dans le gaz d'échappement ; un capteur de concentration de réducteur qui mesure la concentration du réducteur introduit dans le module d'injection de réducteur ; et une unité de régulation de quantité d'injection de réducteur qui détermine une valeur de correction pour une quantité d'injection du réducteur en fonction de la concentration mesurée du réducteur, et régule la quantité d'injection du module d'injection de réducteur de telle sorte que le réducteur puisse être injecté en une quantité d'injection à la valeur de correction déterminée.
PCT/KR2021/001668 2020-02-13 2021-02-08 Appareil et procédé de régulation de l'injection de réducteur pour une réduction catalytique sélective WO2021162389A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020227028079A KR20220121894A (ko) 2020-02-13 2021-02-08 선택적 촉매 환원의 환원제 분사 제어 장치 및 방법

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2020-0017899 2020-02-13
KR20200017899 2020-02-13

Publications (1)

Publication Number Publication Date
WO2021162389A1 true WO2021162389A1 (fr) 2021-08-19

Family

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Application Number Title Priority Date Filing Date
PCT/KR2021/001668 WO2021162389A1 (fr) 2020-02-13 2021-02-08 Appareil et procédé de régulation de l'injection de réducteur pour une réduction catalytique sélective

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KR (1) KR20220121894A (fr)
WO (1) WO2021162389A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
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 (fr) * 2014-11-27 2016-06-02 두산인프라코어 주식회사 Dispositif de mesure de concentration en urée et dispositif d'envoi d'eau d'urée et réservoir d'eau d'urée les comportant
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
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 (fr) * 2014-11-27 2016-06-02 두산인프라코어 주식회사 Dispositif de mesure de concentration en urée et dispositif d'envoi d'eau d'urée et réservoir d'eau d'urée les comportant
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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