WO2011014035A2 - Method for controlling injection amount of fuel of burner and aftertreating device of exhaust gas - Google Patents

Method for controlling injection amount of fuel of burner and aftertreating device of exhaust gas Download PDF

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Publication number
WO2011014035A2
WO2011014035A2 PCT/KR2010/005030 KR2010005030W WO2011014035A2 WO 2011014035 A2 WO2011014035 A2 WO 2011014035A2 KR 2010005030 W KR2010005030 W KR 2010005030W WO 2011014035 A2 WO2011014035 A2 WO 2011014035A2
Authority
WO
WIPO (PCT)
Prior art keywords
exhaust gas
burner
fuel
injection amount
temperature
Prior art date
Application number
PCT/KR2010/005030
Other languages
English (en)
French (fr)
Other versions
WO2011014035A3 (en
Inventor
Youngshol Kim
Yongwoo Kim
Kunchong You
Sunghwan Kim
Hongseok Jung
Yunsik Kim
Original Assignee
Sk Energy Co., Ltd.
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 Sk Energy Co., Ltd. filed Critical Sk Energy Co., Ltd.
Priority to CN2010800356707A priority Critical patent/CN102472137A/zh
Priority to US13/387,935 priority patent/US20120186232A1/en
Priority to DE112010003098T priority patent/DE112010003098T8/de
Publication of WO2011014035A2 publication Critical patent/WO2011014035A2/en
Publication of WO2011014035A3 publication Critical patent/WO2011014035A3/en

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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
    • F01N9/00—Electrical control of 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
    • F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to 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
    • 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
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2033—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using a fuel burner or introducing fuel into exhaust duct
    • 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 controlling an injection amount of fuel of a burner and an aftertreating device of exhaust gas, and more particularly, to a method for controlling an injection amount of fuel of a burner and an aftertreating device of exhaust gas, in which the burner is controlled in consideration of exothermic effect due to a catalytic filter, thereby stably reducing exhaust gas.
  • the diesel engine is a four-stroke engine in which fuel is injected into the engine and then burnt in a compression ignition method, and in a self-ignition process of the fuel, incomplete combustion occurs due to non-uniformity of a fuel-air ratio, and thus noxious particle (exhaust gas) is generated.
  • the noxious particle mainly contains NO x , particulate matter (PM) and CO, and there is a report that the noxious particle accounts for 40% of the total air pollution. Therefore, exhaust emissions are regulated in many countries, and in order to satisfy the regulation, there has been disclosed an aftertreating device of the exhaust gas, which is inserted into a vent pipe so as to reduce the exhaust gas.
  • the exhaust gas generated in a diesel engine is introduced into a filter having a catalyst and then burnt in the filter, thereby reducing the emissions of exhaust gas.
  • injected fuel is oxidized while being passed through a catalytic filter and/or pro catalyst, and thus temperature of the filter in which soot is collected through such reaction is increased.
  • the burner is disposed between an engine and a catalytic filter so as to directly heat the exhaust gas, and the burner is operated in an engine off or idling state or an engine driving state.
  • the fuel injected into the aftertreating device using the burner may be erroneously calculated comparing with an actually necessary amount.
  • the fuel injection amount is decided using the temperature measured at a front end of the catalytic filter in case of using only the catalytic filter or the temperature measured at a front end of the pro-catalyst in case of using both of the pro-catalyst and the filter, it is impossible to reflect the heating effect due to heat generated while the fuel supplied to the burner is oxidized through the catalytic filter and/or pro catalyst.
  • a set temperature value of the aftertreating device using the burner is 500°C
  • the set temperature at the rear end of the burner is maintained within a predetermined error range.
  • the temperature of the exhaust gas after passing through the catalytic filter or the pro-catalyst may be 900°C between the catalytic filter and the pro-catalyst or at the rear end of the catalytic filter, because an excessive and non-reacted hydrocarbon compound generates the heat by catalytic combustion while passing through the catalyst.
  • An object of the present invention is to provide an aftertreating device of exhaust gas, which controls a burner in consideration of exothermic effect occurred when fuel injected from the burner passes through a catalytic filter or a pro-catalyst, thereby stably heating the exhaust gas and also efficiently reducing the emissions of exhaust gas.
  • Another object of the present invention is to provide an aftertreating device of exhaust gas, which properly maintains an internal temperature of the aftertreating device of exhaust gas and thus minimizes deterioration in the durability, and also which appropriately operates the burner according to a vehicle condition and a driving state.
  • the present invention provides a aftertreating device of exhaust gas, including a burner 30 disposed at a vent pipe 20 in which the exhaust gas generated from a diesel engine 10 is flowed and having a fuel injecting part 31 and an igniting means 32 for increasing temperature of the exhaust gas; a diesel particulate filter (DPF) 40 which is disposed at a rear side of the burner 30 in a flow direction of the exhaust gas so as to burn organic materials or particulate matters (PM) contained in the exhaust gas; a temperature sensor 70 for measuring the temperature of the exhaust gas; and a controlling part 50 which controls a fuel injection amount of the fuel injecting part 31 using an engine displacement estimated through the temperature measured from the temperature sensor 70.
  • DPF diesel particulate filter
  • the controlling part 50 estimates the engine displacement by further using RPM information of the diesel engine 10, and the temperature sensor 70 is disposed at a rear side of the DPF 40 in the flow direction of the exhaust gas.
  • the aftertreating device 100 of exhaust gas further includes a pro-catalyst 60 disposed between the burner 30 and the DPF 40, wherein the temperature sensor 70 is disposed between the pro-catalyst 60 and the DPF 40 or at a rear side of the DPF 40 in the flow direction of the exhaust gas.
  • the present invention provides a method for controlling an injection amount of fuel of a burner using the aftertreating device of exhaust gas as described above.
  • the controlling part 50 controls the fuel injection amount so that an amount of hydrocarbon compound is 1 ⁇ 3000ppm at the rear side of the burner 30 in the flow direction of the exhaust gas.
  • the controlling part 50 controls the fuel injection amount to be 0.001 ⁇ 0.02g for 1 minute per 1l of an exhaust emission rate calculated by an equation 1 as follows:
  • a sensor for controlling the fuel injection amount of the burner in consideration of the exothermic effect occurred when the fuel injected from the burner passes through the catalytic filter or the pro-catalyst, thereby efficiently reducing the emissions of exhaust gas without deterioration in the durability.
  • the present invention appropriately operates the burner according to a vehicle condition and a driving state and prevents the problems occurred by the non-reacted fuel injected from the burner.
  • Figs. 1 and 2 are views of an aftertreating device of exhaust gas in accordance with each embodiment of the present invention.
  • Fig. 3 is a graph of temperature changed by controlling a fuel injection amount in the aftertreating device of exhaust gas in accordance with the present invention.
  • Fig. 4 is a graph showing a change in temperature in a comparative example.
  • burner 31 fuel injecting part
  • igniting means 40 catalytic filter
  • Figs. 1 and 2 are views of an aftertreating device 100 of exhaust gas in accordance with each embodiment of the present invention.
  • the aftertreating device 100 of exhaust gas of the present invention includes a burner 30 which is disposed at a vent pipe 20, a catalytic filter 40, a temperature sensor 70 and a controlling part 50.
  • the aftertreating device 100 of exhaust gas of the present invention is disposed at the vent pipe 20 through which the exhaust gas generated from a diesel engine 10 is flowed.
  • the burner 30 includes a fuel injecting part 31 and an igniting means 32 so as to heat the exhaust gas.
  • the drawing shows an example that the burner 30 is disposed to be perpendicular to the vent pipe 20.
  • the burner 30 may be disposed to be parallel with the flow of the exhaust gas or otherwise.
  • the catalytic filter 40 is provided at a rear side of the burner 30 in a flow direction of the exhaust gas so as to burn organic material or particulate matter (PM).
  • the catalytic filter 40 functions to burn the exhaust gas heated by the burner 30 and thus reduce noxious material of the exhaust gas.
  • the controlling part 50 is a means for controlling a fuel injection amount of the fuel injecting part 31 using an engine displacement estimated through a temperature measured from a temperature sensor 70.
  • the controlling part 50 controls the whole operation of the aftertreating device 100 of exhaust gas of the present invention.
  • the aftertreating device 100 of exhaust gas of the present invention is a main element for controlling the fuel injection amount of the controlling part 50, uses the temperature measured by the temperature sensor 70, and may estimate the engine displacement by further using RPM information of the diesel engine 10.
  • the temperature sensor 70 is provided at a rear side of the catalytic filter 40, and the controlling part 50 analyzes the temperature information measured from the temperature sensor 70, whereby the fuel injection amount of the burner 30 is controlled in consideration of the increase of the temperature due to exothermic effect of the catalytic filter.
  • the aftertreating device 100 of exhaust gas of the present invention may further include a pro-catalyst 60 between the burner 30 and the catalytic filter 40.
  • the pro-catalyst 60 functions to burn the organic material contained in the exhaust gas and increase the temperature of the exhaust gas.
  • DOC diesel oxidation catalyst
  • the temperature sensor 70 may be disposed between the pro-catalyst 60 and the catalytic filter 40 in the flow direction of the exhaust gas, as shown in Fig, 2, or disposed at the rear side of the catalytic filter 40 as shown in Fig. 1, or disposed between the pro-catalyst 60 and the catalytic filter 40 and also at the rear side of the catalytic filter 40.
  • the aftertreating device 100 of exhaust gas of the present invention prevents excessive increase of the temperature at a certain place and thus stably reduces the noxious material and improves the durability.
  • the aftertreating device 100 of exhaust gas of the present invention it is possible to prevent the fuel from being excessively supplied by properly controlling the fuel injection amount of the burner 30, and also to enhance the durability.
  • the controlling part 50 compares the temperature measured from the temperature sensor 70 and controls the fuel injection amount, whereby the fuel is properly injected so as to heat the exhaust gas to a target temperature. At this time, the fuel injection amount is controlled so that an amount of hydrocarbon compound is 1 ⁇ 3000ppm at the rear side of the burner 30 in the flow direction of the exhaust gas.
  • the controlling part 50 compares the temperature measured through the temperature sensor 70 and decides whether to inject the fuel, thereby deciding the detailed fuel injection amount in consideration of the measured temperature and the target temperature.
  • controlling part 50 may decide the fuel injection amount and whether to inject the fuel by additionally using the RPM information of the diesel engine 10, as a condition for deciding a vehicle state and a vehicle driving state.
  • the controlling part 50 calculates an exhaust emission rate and controls the fuel injection amount to be 0.001 ⁇ 0.02g per 1l of the exhaust emission rate for 1 minute.
  • the exhaust emission rate is calculated by an equation 1.
  • the exhaust emission rate is proportional to an engine displacement and RPM of a vehicle, and a constant (a) of a load factor may be varied according to the vehicle state. And the exhaust emission rate may be calculated through repeated fuel injection operations.
  • the exhaust emission rate obtained by the engine displacement and the RPM uses as a main factor for deciding the fuel injection amount. If there is no difference between the temperature measured from the temperature sensor 70 and the target temperature, the burner 30 is not operated, and if there is a large difference therebetween, a large amount of fuel is injected within a fuel injection range calculated by the equation 1, and if there is a small difference therebetween, a small amount of fuel is injected within the fuel injection range calculated by the equation 1.
  • Fig. 3 is a graph of temperature changed by controlling a fuel injection amount in the aftertreating device 100 of exhaust gas in accordance with the present invention
  • Fig. 4 is a graph showing a change in temperature in a comparative example, wherein the burner 30, the pro-catalyst 60 coated with platinum and the cordierite catalytic filter 40 are provided at a truck having an engine displacement of 6800cc, as shown in Fig. 2, and the graphs show each temperature at the front end of the pro-catalyst 60, the rear end of the pro-catalyst 60 and the rear end of the filter in a state that the target temperature is 480°C.
  • the controlling parts 50 controls the fuel injection amount of the burner 30 using the temperature measured from the temperature sensor 70 disposed between the pro-catalyst 60 and the catalytic filter 40, and in Fig. 4, the controlling parts 50 controls the fuel injection amount by comparing the temperature measured from the temperature sensor 70 disposed at the front end of the pro-catalyst 60.
  • a maximum temperature is 530°C or less, and the temperature distribution is relatively uniform, comparing with Fig. 4.

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  • 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)
  • Processes For Solid Components From Exhaust (AREA)
PCT/KR2010/005030 2009-07-30 2010-07-30 Method for controlling injection amount of fuel of burner and aftertreating device of exhaust gas WO2011014035A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN2010800356707A CN102472137A (zh) 2009-07-30 2010-07-30 控制燃烧器的燃料喷射量的方法以及废气后处理装置
US13/387,935 US20120186232A1 (en) 2009-07-30 2010-07-30 Method for Controlling Injection Amount of Fuel of Burner and Aftertreating Device of Exhaust Gas
DE112010003098T DE112010003098T8 (de) 2009-07-30 2010-07-30 Verfahren zur Steuerung der Kraftstoffeinspritzmenge eines Brenners und Vorrichtung zurNachbehandlung von Abgasen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2009-0069951 2009-07-30
KR1020090069951A KR20110012287A (ko) 2009-07-30 2009-07-30 배기가스 유해물질 저감장치 및 이에 구비되는 버너의 연료분사량 제어 방법

Publications (2)

Publication Number Publication Date
WO2011014035A2 true WO2011014035A2 (en) 2011-02-03
WO2011014035A3 WO2011014035A3 (en) 2011-06-30

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PCT/KR2010/005030 WO2011014035A2 (en) 2009-07-30 2010-07-30 Method for controlling injection amount of fuel of burner and aftertreating device of exhaust gas

Country Status (5)

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US (1) US20120186232A1 (ko)
KR (1) KR20110012287A (ko)
CN (1) CN102472137A (ko)
DE (1) DE112010003098T8 (ko)
WO (1) WO2011014035A2 (ko)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5559230B2 (ja) * 2012-04-03 2014-07-23 本田技研工業株式会社 内燃機関の排気浄化システム
US9115626B2 (en) * 2012-07-10 2015-08-25 GM Global Technology Operations LLC Kinetics-based SCR control model improvement
DE102018118565A1 (de) 2018-07-31 2020-02-06 Volkswagen Ag Verfahren zur Abgasnachbehandlung eines Verbrennungsmotors und Abgasnachbehandlungssystem
KR102111955B1 (ko) * 2019-12-13 2020-05-18 화이버텍(주) Dpf 재생 시스템 및 dpf 재생 방법
KR102539410B1 (ko) * 2022-10-26 2023-06-05 에이치케이엠엔에스(주) 배출가스 승온을 이용한 차량 배출가스 저감장치 활성화 방법

Citations (3)

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Publication number Priority date Publication date Assignee Title
KR20040106128A (ko) * 2003-06-11 2004-12-17 현대모비스 주식회사 디젤 엔진용 매연저감장치 및 이 장치의 제어방법
KR20080042229A (ko) * 2006-11-09 2008-05-15 현대자동차주식회사 디젤 입자상물질 필터의 재생 방법 및 장치
US20080141663A1 (en) * 2004-01-21 2008-06-19 Yanmar Co., Ltd. Exhaust Gas Purifier and Method of Control Therefor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090069951A (ko) 2007-12-26 2009-07-01 주식회사 하이닉스반도체 비휘발성 메모리 소자
US20090178394A1 (en) * 2008-01-15 2009-07-16 Crane Jr Samuel N Method and Apparatus for Cleaning Electrodes of a Fuel-Fired Burner of an Emission Abatement Assembly

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
KR20040106128A (ko) * 2003-06-11 2004-12-17 현대모비스 주식회사 디젤 엔진용 매연저감장치 및 이 장치의 제어방법
US20080141663A1 (en) * 2004-01-21 2008-06-19 Yanmar Co., Ltd. Exhaust Gas Purifier and Method of Control Therefor
KR20080042229A (ko) * 2006-11-09 2008-05-15 현대자동차주식회사 디젤 입자상물질 필터의 재생 방법 및 장치

Also Published As

Publication number Publication date
DE112010003098T8 (de) 2012-10-04
US20120186232A1 (en) 2012-07-26
KR20110012287A (ko) 2011-02-09
CN102472137A (zh) 2012-05-23
DE112010003098T5 (de) 2012-08-02
WO2011014035A3 (en) 2011-06-30

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