CN101865011A - Emission control system - Google Patents

Emission control system Download PDF

Info

Publication number
CN101865011A
CN101865011A CN201010112998A CN201010112998A CN101865011A CN 101865011 A CN101865011 A CN 101865011A CN 201010112998 A CN201010112998 A CN 201010112998A CN 201010112998 A CN201010112998 A CN 201010112998A CN 101865011 A CN101865011 A CN 101865011A
Authority
CN
China
Prior art keywords
exhaust
catalyst element
ammonia
temperature
catalyst
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.)
Pending
Application number
CN201010112998A
Other languages
Chinese (zh)
Inventor
Y·雅库珀
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ford Global Technologies LLC
Original Assignee
Ford Global Technologies LLC
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 Ford Global Technologies LLC filed Critical Ford Global Technologies LLC
Publication of CN101865011A publication Critical patent/CN101865011A/en
Pending legal-status Critical Current

Links

Images

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
    • 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
    • F01N13/009—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 having two or more separate purifying devices arranged in series
    • 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
    • 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
    • F01N13/011—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 having two or more purifying devices arranged in parallel
    • 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
    • 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

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)

Abstract

The present invention relates to a kind of internal combustion engine exhaust gas that is used for, the emission control system of diesel engine exhaust (1) particularly, described system is arranged in the exhaust duct (2), the entrance pipe (3) that it has main exhaust processing system (22) and has metering equipment (19).Entrance pipe (3) and metering equipment (19) are arranged on the downstream of exhaust-gas treatment system (22) together, and entrance pipe (3) equipment (19) that is measured in the downstream is divided into two catalyzer pipelines (13), these two catalyzer pipelines will be directed to catalyst element (6 from the blast air of explosive motor, 7), described blast air operably enters first catalyst element (6) or second catalyst element (7) by control valve (14).Exhaust-gas treatment system can be realized the nitrogen transformation of greater efficiency.

Description

Emission control system
Technical field
The present invention relates to be used for internal combustion engine exhaust gas, the emission control system of diesel engine exhaust particularly, described system is arranged in the exhaust duct (exhaust tract), and this exhaust duct has the main exhaust processing system and has the entrance pipe (inlet line) of metering equipment.
The invention still further relates to the method for nitrogen oxides reduction in emission control system.
Background technique
US 2008/0127635 A1 discloses the emission control system with shell, wherein is provided with a plurality of air path that produced by dividing element.At least one catalyst and a particulate filter are set in the shell.At least one dividing element is set so that formation is piled up each other and two chambers of relative connection with exhaust entrance, thereby blast air deflects into another chamber from a chamber.Make exhaust gas purification apparatus to use thus, because two chambers are configured to pile up each other with the longitudinal extent that reduces.Thereby the blast air Continuous Flow crosses setting purification in the enclosure, and these are actually series connection.
WO 2006/021337 A1 relates to a kind of particulate filter of catalyst-coated, and it has first end face, second end face and shaft length.Particulate filter applies first catalyzer from its first end face on the part of its length, apply second catalyzer then.First catalyzer has platinum and the palladium on first carrier material, and second catalyzer is included in the platinum on second carrier material, and contains palladium under the suitable situation.Particulate filter has two catalyst coats sprawling continuously with respect to blast air to a certain extent.Such filter has high caloic (thermal mass) and only heating lentamente, and why Here it is provides the precious metal that increases concentration in the filter inlet district.
WO 2006/021338 A1 discloses the method that is used to apply wall stream (wall flow) filter.Wall-flow filter has a plurality of fluid conduit systems that two end faces and relative cylinder axis extend in parallel.For filter action takes place, fluid conduit systems is alternately closed on first end face and second end face.At it by in the stroke of filter, exhaust must from the catheter wall of entry conductor between entry conductor and delivery channel change over (changeover) enter the delivery channel of filter.
DE 602 22 826 T2 (part of WO 03/068362) disclose the filter that is used to handle exhaust.This filter has a plurality of axially extended fluid conduit systems, and described fluid conduit systems partly is alternately closed at second filter at least.The filter roller that cartridge filter is made up of folding filter media, this filter media is by reticulated work helical coil coiled.In first through-flow (throughflow) part, exhaust is not flow through with filtering.First flow passage component is the inside middle that second filter by the annular setting partly centers on.Inside middle only is the flow passage component with opening fluid conduit systems.Filter partly has the catalyst member and the particulate filter part of continuous setting.In one embodiment, the part of the blast air filter part of flowing through, inside and another part is not flowed through with filtering.Yet Just because of this, some exhaust is not cleaned at all.For whole blast air is purified, outlet pipe is connected to interior flow passage component, and flow passage component does not flow into rear chamber with filtering thereby whole blast air is flowed through.At this, blast air is forced through the filter partial reflux to inlet side, and wherein catalyst member and filter part is provided with continuously to be similar to the mode shown in WO 2006/021338 A1.
WO 2004/027230 discloses a kind of equipment that is used to reduce discharging, and it is made up of two parallel exhaust pathways and two renewable minimizing discharge member, and first reduces discharge member has higher minimizing discharge capacity than the second minimizing discharge member.Blast air mainly is directed reducing discharge member through first.For the first minimizing discharge member of regenerating, be arranged on the valve closes of this element upstream, reduce second valve open of discharge member upstream and be arranged on second, thereby blast air is directed reducing discharge member through second.
Therefore, in order to handle,, be well known that catalyst element and filter cell, particularly particulate filter are set in the exhaust duct of explosive motor particularly from the exhaust of diesel engine from explosive motor.In this case, catalyst element is arranged on the upstream of particulate filter or the downstream of particulate filter, and two assemblies can both be arranged in the public shell.Certainly, these two assemblies also can be arranged in the exhaust duct independently in the shell continuously.
If particulate filter is arranged on the upstream of catalyst element, soot combustion (regeneration) can be realized quickly, because blast air still contains enough nitrogen oxide.Yet, because the high caloic of (diesel oil) particulate filter, thus shortcoming to be that the temperature of catalyst element rises very slow, reduce thereby cause catalyzer to transform nitrogen oxide.On the other hand, if be set at (diesel oil) particulate filter upstream, then catalyzer or catalyst element reach operating temperature quickly, thereby cause higher conversion of nitrogen oxides.Yet, this can since in the exhaust nitrous oxides concentration reduce and to cause the soot combustion that reduces, considered active and passive regeneration here.Therefore, the merits and demerits as much of two kinds of combinations.
Summary of the invention
Therefore, the present invention based on purpose be to improve the emission control system of the above-mentioned type by simple mechanism so that exhaust, particularly diesel exhaust gas can more effectively purify, and especially, the efficient of conversion of nitrogen oxides increases.
According to the present invention, its objective is and realize by emission control system with feature of the present invention, entrance pipe and metering equipment (metering device) are set at the downstream of exhaust-gas treatment system together, and entrance pipe is divided into two catalyzer pipelines at the downstream equipment of being measured, it is directed to catalyst element with blast air from explosive motor in every kind of situation, blast air operably enters first catalyst element or second catalyst element by control valve.
Therefore, utilize the present invention, two catalyst elements are advantageously provided, thereby whole blast air is transmitted in one of two catalyst elements by control valve according to its characteristic (delivery temperature etc.).Conversion of nitrogen oxides (NO xTransform) occur in the catalyst element.
A plurality of sensors are arranged in the exhaust duct, and these sensors are used for detected temperatures, NH 3And NO xMolecular proportion and blast air and/or catalyst element in the content of oxygen, nitrogen oxide and/or ammonia, and sensor is connected to control unit.Described a plurality of function also can be integrated in the single-sensor.
Catalyst element is SCR catalyzer (SCR: selective catalytic reduction) preferably.In this case, nitrogen oxide and ammonia (NH 3) and oxygen (O 2) reaction formation nitrogen (N 2) and water (H 2O).And the SCR catalyzer can be stored ammonia at low temperatures, and this ammonia is used and desorption under higher temperature subsequently.
The needed ammonia of reaction in the SCR catalyzer does not use with respective pure form, but as aqueous solution of urea (urea: (NH 2) 2CO)) use.This aqueous solution in exhaust duct, and as the result of hydrolysis reaction, forms carbon dioxide (CO in the injected upstream of SCR catalyzer 2) and needed ammonia.
Preferably, can utilize metering equipment that reducing agent is injected in the blast air in the upstream of catalyst element.Further preferably, reducing agent is an ammonia.As mentioned above, conversion of nitrogen oxides needs ammonia.
According to the ratio between the ammonia of delivery temperature and storage at low temperatures, or delivery temperature and at catalyst element ingress NH 3/ NO xRatio between the ratio, control valve preferably conducts blast air and enters first catalyst element or second catalyst element, first catalyst element is applicable to the conversion of nitrogen oxides under the low exhaust temperature, and second catalyst element is applicable to the conversion of nitrogen oxides under the high exhaust temperature.
Switchable control valve is arranged in the blast air and is used to conduct blast air and enters low-temperature SCR system or high temperature SCR system.Which system blast air is transmitted to is according to delivery temperature and is stored in the relation of the ammonia amount in the catalyst element or function and according to delivery temperature and definite by control unit in the relation of the molecular proportion of catalyst element ingress ammonia and nitrogen oxide, and control unit is connected to control valve.
In addition, the objective of the invention is to realize by a kind of method, in the method, blast air is transmitted in two catalyst elements one by control valve, conversion of nitrogen oxides when in two catalyst elements one is set for low exhaust temperature, and another catalyst element is set for the conversion of nitrogen oxides of high exhaust temperature.
Valuably, used catalyst element is the SCR catalyzer.
Preferably, pass through control valve, blast air with low exhaust temperature is transmitted in first catalyst element, wherein the amount of Cun Chu ammonia remains near the maximum storage capacity of first catalyst element, and the blast air with high exhaust temperature is transmitted in second catalyst element, wherein the amount of Cun Chu ammonia remains on low-levelly, and ammonia directly is injected in the blast air.
Under low exhaust temperature, control valve is switched, thereby when the approaching expectation of ammonia memory space threshold value, the blast air of largest portion is through the low-temperature SCR system.
In the situation of low ammonia memory space, control valve is set, thus most of exhaust conduction process high-temperature systems, and ammonia is directly injected.The residue exhaust is transmitted in the low-temperature SCR system, mainly is in order to fill the SCR catalyzer with ammonia.When the low-temperature SCR system has the ammonia amount of expectation, control valve changes, thereby conduct most of cryopumping through the low-temperature SCR system, and in this case, the ammonia that injects is stayed the SCR catalyzer, so that keep the ammonia amount of storage or in order to compensate the ammonia that consumes in the conversion of nitrogen oxides process.
For high-temperature exhaust air stream, control valve is set, thus exhaust conducted through high temperature SCR system and be used so that transform NO by the ammonia amount of setting direct injection xExhaust emissions.
Description of drawings
Further advantageous embodiment of the present invention is open and below shown in the figure, wherein in aspect the present invention is concrete:
Fig. 1 illustrates the schematic representation according to emission control system of the present invention with two SCR catalyzer;
Fig. 2 illustrates a plotted curve, and wherein conversion of nitrogen oxides efficient is shown as catalyst temperature (delivery temperature) and the function of the ammonia stored;
Fig. 3 illustrates a plotted curve, and wherein conversion of nitrogen oxides efficient is shown as catalyst temperature (delivery temperature) and at the function of the molecular proportion of SCR catalyst inlet place's ammonia and nitrogen oxide; And
Fig. 4 illustrates a plotted curve, and wherein ammonia storage capacity is shown as catalyst temperature and at the function of SCR catalyst inlet place ammonia concentration.
Embodiment
Fig. 1 illustrates the structural drawing of the emission control system 1 that is used for internal combustion engine exhaust gas, particularly diesel engine exhaust according to the present invention, and described system is arranged in the exhaust duct 2.Exhaust duct 2 has entrance pipe 3 and export pipeline 4.Emission control system 1 according to the present invention has two pump-down process elements that are set to catalyst element 6,7.
In every kind of situation, catalyst element 6,7 all has relative inlet side 8 and outlet side 9.
Entrance pipe 3 (arrow 11) on the direction of emission control system 1 conducts the exhaust from explosive motor.At inlet side, entrance pipe 3 has the branch 12 that entrance pipe 3 is divided into two catalyzer pipelines 13.Control valve 14 is arranged in the branch 12, and by this control valve, blast air can be transmitted in two catalyzer pipelines 13.Control valve 14 is controlled by unshowned in the drawings control unit.The data that the control unit assessment is measured by the sensor (not shown) are as ammonia level, NO xContent, delivery temperature or catalyst temperature, catalyst element 6,7 ingress ammonia and NO xRatio etc., and enter in two catalyst elements 6,7 one by being fixed on control valve 14 conduction blast airs in the blast air, one in the catalyst element 6,7 is configured to low-temperature SCR catalyst, another is configured to high temperature SCR catalyzer.The control of data and assessment are to be undertaken by suitable software in the control unit.
In every kind of situation, catalyzer pipeline 13 is connected to one inlet side 8 in two catalyst elements 6,7.
Relative main flow direction (arrow 16), the blast air that flows into each catalyst element 6,7 is through each catalyst element 6,7.
At outlet side, each catalyst element 6,7 has connecting element 17 so that be connected to export pipeline 4.
In the downstream, export pipeline 4 can be connected to for example intake silencer system 18.
In the upstream of branch 12 metering equipment 19 is set, by this metering equipment, the urea that reducing agent such as ammonia or be used for produces ammonia is injected into blast air (arrow 21).
Main exhaust processing system 22 can be arranged on the upstream of entrance pipe.For example, main exhaust processing system 22 can contain oxidation catalyst, particulate filter, NO xCatcher and/or SCR catalyzer.
Oxidation catalyst is used for increasing blast air NO 2/ NO ratio.Therefore the efficient of catalyst element 6,7 can further increase, because NO 2Faster than the NO reaction in SCR catalyst element 6,7.
What be arranged on main exhaust processing system 22 upstreams is for example (master) air filter 23, turbosupercharger 24 and engine system 26 (explosive motor).Engine system 26 can contain for example charger-air cooler, intake manifold, combustion system and/or gas exhaust manifold.
In an embodiment of the present invention, as shown in Figure 1, two SCR catalyst element 6,7 parallel uses.First catalyst element 6 is used for the conversion of nitrogen oxides when low exhaust temperature and the consumption of low ammonia.Second catalyst element 7 is arranged on the path parallel with first catalyst element 6, and is set for high exhaust temperature and high ammonia consumption.In first catalyst element 6 (first (lower temperature) SCR catalyzer), the amount of the ammonia of being stored remains near maximum storage capacity (89%-90%), so that realize high as far as possible conversion of nitrogen oxides.In addition, if consume low, what for to the blast air that less amount is arranged through this system.And the connecting tube of a SCR catalyst element 6 and size and capacity all are optimized for the conversion of nitrogen oxides under the low temperature, and this causes little SCR antigravity system usually, because expection has low spatial velocity.
In the 2nd SCR catalyst element 7, the amount of the ammonia of being stored remains on low-level, and the size of second catalyst element 7 and capacity are optimized for the spatial velocity and the delivery temperature that generally will cause big SCR antigravity system.
Fig. 2 illustrates a plotted curve, wherein conversion of nitrogen oxides efficient (E, %) ammonia (NH that is shown as delivery temperature (T, ℃) and is stored 3, function g).
As can be seen from Figure 2, depend on the amount of delivery temperature and the ammonia of being stored in the efficient of the following SCR catalyzer of lower temperature (to 400 ℃).
Conversion of nitrogen oxides efficient under higher exhaust gas temperature mainly is subjected to the ingress NH of SCR catalyst element 6,7 3With NO xMolecular proportion influence (with reference to figure 3).
Fig. 3 illustrates a plotted curve, and wherein (E %) is shown as delivery temperature (T, ℃) and at the ingress ammonia of SCR catalyst element 6,7 and the molecular proportion (NH of nitrogen oxide to conversion of nitrogen oxides efficient 3/ NO xMol ratio) function.
In order when working, to obtain effective conversion of nitrogen oxides, need to realize certain compromise based on the processing system of SCR.When such system works, that is to say that the ammonia of a large amount of storages remained in the catalyzer when low ammonia consumed under low exhaust temperature.Under high exhaust temperature, the maximum storage capacity of catalyzer is lowered.In order to obtain required ammonia and NO in SCR catalyst element 7 ingress xMolecular proportion, the amount that is stored in the ammonia in the catalyst element 7 must be reduced to low limit, thus conversion of nitrogen oxides is mainly directly injected control by ammonia.
Fig. 4 illustrates a plotted curve, and wherein (K g) is shown as catalyst temperature (T, ℃) and at SCR catalyst element 6,7 ingress ammonia concentration (NH to ammonia storage capacity 3, function ppm).
As shown in Figure 4, ammonia storage capacity is significantly reduced under higher exhaust gas temperature.Therefore, suppose that the unexpected increase of catalyst temperature represents that the storage ammonia of initial high-load causes the unexpected desorption of storing of ammonia, this so that cause direct ammonia to be escaped.The ammonia of escaping is the relative NO of ammonia xFractional doses too much (overdose) ammonia or do not possess the ammonia of the desired temperature of reaction.

Claims (7)

1. emission control system (1) that is used for internal combustion engine exhaust gas, particularly diesel engine exhaust, described system is arranged in the exhaust duct (2), the entrance pipe (3) that it has main exhaust processing system (22) and has metering equipment (19),
Wherein said entrance pipe (3) is arranged on the downstream of described exhaust-gas treatment system (22) with described metering equipment (19), described entrance pipe (3) is divided into two catalyzer pipelines (13) in the downstream by described metering equipment (19), these two catalyzer pipelines will be directed to catalyst element (6 from the described blast air of described explosive motor in every kind of situation, 7), described blast air operably enters first catalyst element (6) or second catalyst element (7) by control valve (14).
2. emission control system according to claim 1 (1), wherein
Described catalyst element (6,7) is that selective catalytic reduction is the SCR catalyzer.
3. emission control system according to claim 1 and 2 (1), wherein
Can in described catalyst element (6,7) upstream reducing agent be injected in the described blast air by described metering equipment (19).
4. emission control system according to claim 3 (1), wherein
Described reducing agent is an ammonia.
5. according to the described emission control system of aforementioned each claim (1), wherein
According to described delivery temperature and the ratio between the ammonia of low temperature storage, or described delivery temperature and at the NH3/NO of described catalyst element (6,7) ingress xRatio between the ratio, the described blast air of described control valve (14) conduction enters described first catalyst element (6) or described second catalyst element (7), described first catalyst element (6) is applicable to the conversion of nitrogen oxides under low exhaust temperature, and described second catalyst element (7) is applicable to the conversion of nitrogen oxides under high exhaust temperature.
6. one kind is being used for internal combustion engine exhaust gas, the method of nitrogen oxides reduction in the emission control system of diesel engine exhaust (1) particularly, each claim is described especially as described above, described system is arranged in the exhaust duct (2), the entrance pipe (3) that it has main exhaust processing system (22) and has metering equipment (19), wherein
Flow to two catalyst elements (6 by the described exhaust of control valve (14) conduction, 7) one of, one (6) in described two catalyst elements are set for the conversion of nitrogen oxides under low exhaust temperature, and another catalyst element (7) is set for the conversion of nitrogen oxides under high exhaust temperature.
7. method according to claim 6, wherein,
By described control valve (14), the exhaust that conduction has low exhaust temperature flows in first catalyst element (6), wherein the amount of the ammonia of being stored remains near the maximum storage capacity of described first catalyst element (6), and the exhaust that conduction has high exhaust temperature flows in second catalyst element (7), wherein the amount of the ammonia of being stored remains on low-levelly, and ammonia directly is injected in the described blast air.
CN201010112998A 2009-02-12 2010-02-08 Emission control system Pending CN101865011A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009000804.7 2009-02-12
DE102009000804A DE102009000804B4 (en) 2009-02-12 2009-02-12 emission control system

Publications (1)

Publication Number Publication Date
CN101865011A true CN101865011A (en) 2010-10-20

Family

ID=42338414

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201010112998A Pending CN101865011A (en) 2009-02-12 2010-02-08 Emission control system

Country Status (3)

Country Link
US (1) US20100199643A1 (en)
CN (1) CN101865011A (en)
DE (1) DE102009000804B4 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104781517A (en) * 2012-09-14 2015-07-15 Mtu腓特烈港有限责任公司 Scr module
CN105927327A (en) * 2016-06-01 2016-09-07 吴本刚 High-temperature tail gas heat recovery energy-saving device
CN106076110A (en) * 2016-06-01 2016-11-09 吴本刚 High-speed fermentation organic garbage disposal
CN107630736A (en) * 2017-11-10 2018-01-26 潍柴动力股份有限公司 A kind of multichip carrier SCR assemblies and its method of work
CN112696250A (en) * 2020-12-16 2021-04-23 佛山职业技术学院 Automobile exhaust fully-processing device
CN114934833A (en) * 2022-05-30 2022-08-23 潍柴动力股份有限公司 Post-processing system control method, system and storage medium

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012129179A1 (en) * 2011-03-18 2012-09-27 Cummins Inc. A method and apparatus to control selective catalytic reduction systems in feedback
US8800272B2 (en) * 2011-07-15 2014-08-12 Ford Global Technologies, Llc System and method for processing NHD slippage of a selective catalyst reduction system
DE102012216885B4 (en) * 2011-10-24 2014-05-08 Ford Global Technologies, Llc aftertreatment system
DE102013213294A1 (en) 2013-07-08 2015-01-08 Ford Global Technologies, Llc (N.D.Ges.D. Staates Delaware) Combustion engine with cylinder deactivation and method for cylinder deactivation
DE102013213292B4 (en) 2013-07-08 2015-02-26 Ford Global Technologies, Llc (N.D.Ges.D. Staates Delaware) Combustion engine with cylinder deactivation and method for cylinder deactivation
DE202013103022U1 (en) 2013-07-08 2013-07-18 Ford Global Technologies, Llc Internal combustion engine with cylinder deactivation
US20150337702A1 (en) * 2014-05-23 2015-11-26 Tenneco Automotive Operating Company Inc. Exhaust aftertreatment system with low-temperature scr
CN105927332A (en) * 2016-06-01 2016-09-07 吴本刚 Novel marine exhaust gas treatment device
CN105927328A (en) * 2016-06-01 2016-09-07 吴本刚 Filter for exhaust gas of diesel engine
CN105927330A (en) * 2016-06-01 2016-09-07 吴本刚 Multi-shaft stirring pile drilling machine
CN105927329A (en) * 2016-06-01 2016-09-07 吴本刚 Catalytic conversion system for waste gas treatment
CN105822890A (en) * 2016-06-01 2016-08-03 吴本刚 Purification circulating device of lubricating oil
CN105927331A (en) * 2016-06-01 2016-09-07 吴本刚 Arched tunnel excavator
CN106046413A (en) * 2016-06-01 2016-10-26 吴本刚 Microwave automatic cracking reaction device for waste rubber
CN105952511A (en) * 2016-06-01 2016-09-21 吴本刚 Rectangular concrete grouting pile hole forming machine
EP3569834A1 (en) * 2018-05-18 2019-11-20 Winterthur Gas & Diesel Ltd. Internal combustion engine and method for reducing nitrogen oxide emissions
GB2579589B (en) * 2018-12-04 2023-07-26 Caterpillar Energy Solutions Gmbh Startup flow control routine in exhaust gas treatment system
US11867111B2 (en) 2019-05-09 2024-01-09 Cummins Emission Solutions Inc. Valve arrangement for split-flow close-coupled catalyst
CN112814770B (en) * 2020-12-31 2022-04-05 潍柴动力股份有限公司 Uniformity evaluation method and device of parallel SCR system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1334797A (en) * 1970-11-20 1973-10-24 British Leyland Motor Corp Exhaust systems for internal combustion engines
US5406790A (en) * 1992-12-11 1995-04-18 Toyota Jidosha Kabushiki Kaisha Exhaust gas purification device for an engine
CN1334899A (en) * 1999-01-25 2002-02-06 丰田自动车株式会社 Exhaust emission control device of internal combustion engine
WO2002032552A1 (en) * 2000-10-17 2002-04-25 Robert Bosch Gmbh Exhaust gas cleaning system and method for cleaning exhaust gas
US20040037755A1 (en) * 2002-07-11 2004-02-26 Rahul Mital NOx adsorber aftertreatment system for internal combustion engines
US20050056004A1 (en) * 2000-08-15 2005-03-17 Engelhard Corporation Exhaust system for enhanced reduction of nitrogen oxides and particulates from diesel engines
US20090004083A1 (en) * 2003-12-17 2009-01-01 Valentine James M NOx control for IC engines

Family Cites Families (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1298957C (en) * 1987-01-27 1992-04-21 Motonobu Kobayashi Method for removal of nitrogen oxides from exhaust gas of diesel engine
US6125629A (en) * 1998-11-13 2000-10-03 Engelhard Corporation Staged reductant injection for improved NOx reduction
JP3518398B2 (en) * 1999-03-11 2004-04-12 トヨタ自動車株式会社 Exhaust gas purification device for internal combustion engine
US7211226B2 (en) 2000-03-09 2007-05-01 Fleetgaurd, Inc. Catalyst and filter combination
US6776814B2 (en) * 2000-03-09 2004-08-17 Fleetguard, Inc. Dual section exhaust aftertreatment filter and method
WO2003050398A1 (en) * 2001-12-10 2003-06-19 Donaldson Company, Inc. Exhaust treatment control system for an internal combustion engine
US7264785B2 (en) * 2001-12-20 2007-09-04 Johnson Matthey Public Limited Company Selective catalytic reduction
US6679051B1 (en) * 2002-07-31 2004-01-20 Ford Global Technologies, Llc Diesel engine system for use with emission control device
GB0221920D0 (en) * 2002-09-20 2002-10-30 Ricardo Consulting Eng Emission reduction apparatus
US6761025B1 (en) * 2002-12-19 2004-07-13 Caterpillar Inc. Enhanced ammonia feed control for selective catalytic reduction
FR2862704B1 (en) * 2003-11-25 2006-02-24 Peugeot Citroen Automobiles Sa SYSTEM FOR AIDING THE REGENERATION OF INTEGRATED EMISSION MEANS IN AN EXHAUST LINE OF A VEHICLE ENGINE
US7377101B2 (en) * 2004-02-13 2008-05-27 Fleetguard, Inc. Plasma fuel converter NOx adsorber system for exhaust aftertreatment
DE102004024370A1 (en) * 2004-05-17 2005-12-15 Volkswagen Ag Combustion engine comprises an auxiliary energy unit and an exhaust gas cleaning system having a nitrogen oxide storage-reduction unit arranged in the exhaust gas pipe
DE102004040549B4 (en) * 2004-08-21 2017-03-23 Umicore Ag & Co. Kg Catalytically coated particle filter and its use
DE102004040550A1 (en) * 2004-08-21 2006-02-23 Umicore Ag & Co. Kg Process for coating a wall-flow filter with a coating composition
US7827782B2 (en) * 2005-05-19 2010-11-09 Ford Global Technologies, Llc Method for remediating emissions
US20070056268A1 (en) * 2005-09-10 2007-03-15 Eaton Corporation LNT-SCR packaging
JP4698359B2 (en) * 2005-09-22 2011-06-08 Ｕｄトラックス株式会社 Exhaust purification device
DE102006009934A1 (en) * 2006-03-03 2007-09-06 Daimlerchrysler Ag Exhaust gas aftertreatment system and process for exhaust gas purification
US7673446B2 (en) * 2007-01-29 2010-03-09 Caterpillar Inc. Dual path exhaust emission control system
US8171724B2 (en) * 2007-05-02 2012-05-08 Ford Global Technologies, Llc Vehicle-based strategy for removing urea deposits from an SCR catalyst
US20080295499A1 (en) * 2007-05-31 2008-12-04 James Joshua Driscoll Exhaust system utilizing a low-temperature oxidation catalyst
US20090199537A1 (en) * 2008-02-11 2009-08-13 Detroit Diesel Corporation Methods to protect selective catalyst reducer aftertreatment devices during uncontrolled diesel particulate filter regeneration
GB2460825A (en) * 2008-06-06 2009-12-16 Delphi Tech Inc Reagent dosing system
US20100101221A1 (en) * 2008-10-28 2010-04-29 Caterpillar Inc. CATALYSTS, SYSTEMS, AND METHODS FOR REDUCING NOx IN AN EXHAUST GAS
US8096110B2 (en) * 2008-11-19 2012-01-17 GM Global Technology Operations LLC Ammonia (NH3) storage control system and method at low nitrogen oxide (NOx) mass flow rates

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1334797A (en) * 1970-11-20 1973-10-24 British Leyland Motor Corp Exhaust systems for internal combustion engines
US5406790A (en) * 1992-12-11 1995-04-18 Toyota Jidosha Kabushiki Kaisha Exhaust gas purification device for an engine
CN1334899A (en) * 1999-01-25 2002-02-06 丰田自动车株式会社 Exhaust emission control device of internal combustion engine
US20050056004A1 (en) * 2000-08-15 2005-03-17 Engelhard Corporation Exhaust system for enhanced reduction of nitrogen oxides and particulates from diesel engines
WO2002032552A1 (en) * 2000-10-17 2002-04-25 Robert Bosch Gmbh Exhaust gas cleaning system and method for cleaning exhaust gas
US20040037755A1 (en) * 2002-07-11 2004-02-26 Rahul Mital NOx adsorber aftertreatment system for internal combustion engines
US20090004083A1 (en) * 2003-12-17 2009-01-01 Valentine James M NOx control for IC engines

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104781517A (en) * 2012-09-14 2015-07-15 Mtu腓特烈港有限责任公司 Scr module
CN105927327A (en) * 2016-06-01 2016-09-07 吴本刚 High-temperature tail gas heat recovery energy-saving device
CN106076110A (en) * 2016-06-01 2016-11-09 吴本刚 High-speed fermentation organic garbage disposal
CN107630736A (en) * 2017-11-10 2018-01-26 潍柴动力股份有限公司 A kind of multichip carrier SCR assemblies and its method of work
CN107630736B (en) * 2017-11-10 2020-06-26 潍柴动力股份有限公司 Multi-carrier SCR assembly and working method thereof
CN112696250A (en) * 2020-12-16 2021-04-23 佛山职业技术学院 Automobile exhaust fully-processing device
CN112696250B (en) * 2020-12-16 2022-06-10 佛山职业技术学院 Automobile exhaust fully-processing device
CN114934833A (en) * 2022-05-30 2022-08-23 潍柴动力股份有限公司 Post-processing system control method, system and storage medium

Also Published As

Publication number Publication date
DE102009000804A1 (en) 2010-08-19
US20100199643A1 (en) 2010-08-12
DE102009000804B4 (en) 2013-07-04

Similar Documents

Publication Publication Date Title
CN101865011A (en) Emission control system
CN101725394B (en) Method and architecture for reducing nox and particulate matter emissions in exhaust gas from hydrocarbon fuel source with a fuel lean combustion mixture
US20110225969A1 (en) Compressor bypass to exhaust for particulate trap regeneration
US8978368B2 (en) Exhaust-gas aftertreatment system and method for exhaust-gas aftertreatment
CN101316993A (en) Method of controlling exhaust gas purification system and exhaust gas purification system
WO2011045847A1 (en) Exhaust purification device for engine
CN101408123B (en) Exhaust purification apparatus for engine
JP5763294B2 (en) Exhaust purification equipment
US20110099996A1 (en) Exhaust aftertreatment system
CN102220895A (en) Closely-coupled exhaust aftertreatment system for a turbocharged engine
JP2013142363A (en) Exhaust emission control device of diesel engine
US11346266B2 (en) Engine exhaust aftertreatment device and method
CN104234801B (en) Exhaust gas sampling equipment
CN104884752A (en) SCR exhaust-gas aftertreatment device and motor vehicle having such an SCR exhaust-gas aftertreatment device
CN102889108A (en) Exhaust aftertreatment system for compression-ignition engines
JP5258426B2 (en) Engine exhaust purification system
CN102128072B (en) Engine exhaust system and operational approach
US20120090304A1 (en) Multiple Flow Path Exhaust Treatment System
JP2006266192A (en) Exhaust emission control device for engine
JP5020185B2 (en) Exhaust purification device
JP5166848B2 (en) Exhaust purification device
US8105542B2 (en) Engine exhaust gas purifier
JP6589365B2 (en) Exhaust gas purification system
JP4671834B2 (en) Engine exhaust gas purification device
CN113833552B (en) Carbon particle removal method and exhaust gas aftertreatment system

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20101020