US20130276432A1 - Internal combustion engine exhaust line - Google Patents

Internal combustion engine exhaust line Download PDF

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Publication number
US20130276432A1
US20130276432A1 US13/978,846 US201113978846A US2013276432A1 US 20130276432 A1 US20130276432 A1 US 20130276432A1 US 201113978846 A US201113978846 A US 201113978846A US 2013276432 A1 US2013276432 A1 US 2013276432A1
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US
United States
Prior art keywords
filter
catalytic coating
impregnated
particulate filter
exhaust line
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.)
Abandoned
Application number
US13/978,846
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English (en)
Inventor
Gabriel Crehan
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.)
PSA Automobiles SA
Original Assignee
Peugeot Citroen Automobiles SA
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 Peugeot Citroen Automobiles SA filed Critical Peugeot Citroen Automobiles SA
Assigned to PEUGEOT CITROEN AUTOMOBILES SA reassignment PEUGEOT CITROEN AUTOMOBILES SA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CREHAN, GABRIEL
Publication of US20130276432A1 publication Critical patent/US20130276432A1/en
Abandoned legal-status Critical Current

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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
    • 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
    • F01N3/033—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 in combination with other devices
    • F01N3/035—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 in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • 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
    • F01N13/02—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 silencers 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
    • 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
    • F01N3/103—Oxidation catalysts for HC and CO only
    • 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
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • 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]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Definitions

  • the invention relates to an exhaust line for an internal combustion engine.
  • the invention also relates to a drive assembly comprising the exhaust line.
  • the invention relates to a vehicle equipped with the drive assembly.
  • the exhaust gases emitted from an internal combustion engine contain pollutants whose release into the atmosphere it is desirable to reduce.
  • pollutants designates, more particularly, nitrogen oxides NOx (N20, NO and NO2), carbon monoxide (CO), unburned hydrocarbons (HC) and soot particles.
  • N20, NO and NO2 nitrogen oxides NOx
  • CO carbon monoxide
  • HC unburned hydrocarbons
  • soot particles soot particles.
  • the exhaust line of an internal combustion engine comprises:
  • the oxidation catalyst and the reduction catalyst can be included inside the particulate filter to form a filter particle called “bi-catalyzed”.
  • a bi-catalyzed particulate filter comprises generally a honeycomb structure.
  • the filter comprises an inlet face for the entry of exhaust gases inside the filter and an outlet face for the evacuation of exhaust gases from the filter.
  • the filter comprises, between the inlet and outlet faces, a set of channels or ducts adjacent to axes parallel to one another, separated by porous filtering walls.
  • the ducts are closed off at one or the other of their ends to delimit intake ducts leading only to the inlet face and exhaust ducts leading only to the outlet face.
  • the ducts are alternately closed off in an order such that the exhaust gases, while passing through the filter, are forced to pass through the side walls of the intake ducts to reach the exhaust ducts. In this way, the soot particles are deposited and accumulate on the porous walls of the filter.
  • These inner walls of the particulate filter are impregnated with catalytic coatings to form the reduction catalyst and the oxidation catalyst.
  • the particulate filter is made of silicon carbide.
  • a first drawback of this type of bi-catalyzed particulate filter is that, in order to ensure the regulatory decontamination of exhaust gas, it is necessary that the amount of impregnated catalytic coating on the walls be greater than a minimum threshold.
  • a known solution is to increase the volume of the particulate filter so that more catalytic coating can be deposited without clogging the pores of the filter.
  • this solution is to be avoided as it increases the overall size of the exhaust line.
  • a second drawback is that the reduction of nitrogen oxides (NO x ) requires that the temperature of the exhaust gases be greater than a threshold temperature in order to take place.
  • the filter being made of silicon carbide, it dissipates the heat of the exhaust gas passing through this filter and therefore decreases the amount of the reduced nitrogen oxides. Under these conditions, it is known to increase the amount of catalyst in the particulate filter in order to maintain a satisfactory amount of reduced nitrogen oxides at low temperature. However, that amount of catalyst (typically precious materials) is often significant. Such addition of catalyst is costly to the filter manufacturer.
  • a third drawback is that, in order to allow the reduction of nitrogen oxides (NO x ), a reducing agent, typically urea, is injected into the pipe upstream of the filter.
  • a reducing agent typically urea
  • the invention aims to overcome one or more of these drawbacks.
  • the invention relates to an exhaust line for an internal combustion engine, this exhaust line comprising:
  • the additional filter can be impregnated with an amount of first catalytic coating per unit volume greater than the particulate filter.
  • the additional filter creates a pressure drop lower than the pressure drop that would be created by the same volume of the particulate filter impregnated with the same amount of catalytic coating as the additional filter.
  • the consumption of the engine is not worsened compared to that with a lengthened particulate filter.
  • the invention also relates to a drive assembly, the assembly comprising:
  • the invention finally relates to an engine vehicle equipped with the drive assembly.
  • FIG. 1 is a partial schematic illustration of a vehicle equipped with a drive assembly comprising an exhaust line, in accordance with various embodiments of the invention.
  • FIG. 1 shows a vehicle 2 such as an automobile.
  • vehicle 2 is a car.
  • This vehicle 2 is equipped with a drive assembly 4 .
  • the assembly 4 comprises an internal combustion engine 6 and an exhaust line 8 .
  • the engine 6 is capable of rotating the drive wheels 10 of the vehicle 2 .
  • the engine 6 is a diesel engine.
  • the engine 6 is discharging exhaust gases which, before being expelled to the outside of the vehicle 2 , are received by the exhaust line 8 capable of processing these gases.
  • the exhaust line 8 comprises a pipe 12 receiving the exhaust gases through an opening 13 in an exhaust manifold of engine 6 .
  • the pipe 12 is a cylindrical tube of circular section.
  • the pipe 12 is made of steel.
  • the exhaust line 8 includes a particulate filter 14 (also known as FAP) able to retain the soot particles contained in the exhaust gases and burn these particles.
  • the filter 14 is adapted to retain particles of a diameter greater than, or equal to 23 nm.
  • the filter 14 is housed inside the pipe 12 .
  • the filter 14 is advantageously made of silicon carbide.
  • the filter 14 includes a honeycomb structure.
  • the internal structure of the filter 14 is known per se. It has already been presented in the introduction, so it is not described in detail.
  • reference 16 and 18 designate, respectively, the inlet face and the outlet face of the filter 14 .
  • the filter 14 includes a plurality of intake and exhaust ducts.
  • the ducts 20 and 22 are bonded to each other by means of cement.
  • this cement can comprise one or more of the following chemical species: cordierite, SiC, B 4 C, Si 3 N 4 , BN, AlN, Zr0 2 , mullite, AL titanate, ZrB 2 , and/or Sialon (an alloy of silicon, aluminum, oxygen and nitride).
  • the length of the filter 14 is between 5 cm and 75 cm.
  • the length can be between 18 cm and 25 cm.
  • the filter 14 is a bi-catalyzed filter.
  • the porous walls of the ducts are impregnated with two catalytic coatings.
  • the porous walls of the intake ducts 20 are only impregnated with a catalytic coating R cat1 .
  • the coating R cat1 forms a selective reduction catalyst (also known as SCR). This selective reduction catalyst is capable of converting the nitrogen oxides (NOx) contained in exhaust gases passing through the filter 14 into nitrogen (N2) and water (H20).
  • the R cat1 catalytic coating is known per se.
  • the R cat1 coating contains one or more of the following chemical species: Al 2 0 3 , Ti0 2 , Zr0 2 , Ce0 2 , Y 2 0 3 , Pr0 2 , Si0 2 .
  • the porous walls of the exhaust ducts 22 are only impregnated with a catalytic coating R cat2 .
  • the R cat2 coating forms a diesel oxidation catalyst (also called DOC).
  • the diesel oxidation catalyst is capable of converting the carbon monoxides (CO) and hydrocarbons (HC) contained in the exhaust gases passing through the filter 14 into carbon dioxide (CO 2 ) and water (H 2 O).
  • the R cat2 catalytic coating is known per se.
  • the R cat2 coating contains one or more of the following chemical species: Al 2 O 3 , TiO 2 , ZrO 2 , CeO 2 , Y 2 O 3 .
  • the R cat1 and R cat2 coatings further contain a catalyst.
  • the catalyst is a material or alloy of materials belonging to the platinum group (also called “Platinum Group Metals (PGM)).
  • Platinum Group Metals designates here the rhodium (Rh), the ruthenium (Ru), the iridium (Ir), the rhenium (Re), the osmium (Os), the platinum (Pt) and the palladium (Pd).
  • the catalyst is an alloy of platinum (Pt) and palladium (Pd).
  • the mass of materials belonging to the platinum group is greater in the catalytic coating R cat2 than in the catalytic-coating R cat1 .
  • the total amount of catalytic coatings impregnated in the filter 14 is greater or equal to 50 g per liter of filter and, in various implementations, the total amount of impregnated catalytic coatings is greater than 100 g per liter of filter. Generally, the amount of catalytic coating in the filter 14 is lower than 200 g per liter of filter. In various embodiments, the R cat1 coating and the R cat2 coating each represents between 40% and 60% of the total volume of impregnated catalytic coating.
  • the exhaust line 8 also includes a reservoir 26 .
  • the reservoir 26 contains a reducing agent for reducing the nitrogen oxides (NO x ) contained in exhaust gases into nitrogen (N 2 ) and water (H 2 O).
  • the reducing agent is urea. Under the effect of heat, the urea is decomposed into ammonia (NH 3 ) which reacts with the NO in the reduction catalysts coatings to reduce the NO x .
  • the reducing agent is injected into the pipe 12 upstream of the particulate filter 14 through an injector 28 .
  • the injector 28 injects urea downstream of a turbo-compressor (not shown).
  • the injector 28 comprises a temperature sensor for the exhaust gases upstream of the particulate filter 14 .
  • downstream and upstream are defined relative to the direction of flow of exhaust gases in the pipe 12 .
  • the direction of flow of the exhaust gases in the pipe 12 is represented by arrows in FIG. 1 .
  • the exhaust line 8 also includes an additional filter 30 .
  • the filter 30 is adapted to carry out the reduction of nitrogen oxides (NO x ) contained in the exhaust gases into nitrogen (N 2 ) and water (H 2 O).
  • the filter 30 comprises ducts 33 passing through the filter 30 from end to end.
  • the ducts 33 lead to an inlet face 32 and an outlet face 34 .
  • FIG. 1 only two ducts 33 are shown.
  • the ducts 33 are separated by inner walls 35 . In various embodiments, these walls 35 are less porous than the walls of the filter 14 .
  • the inner walls 35 of the filter 30 separating the ducts 33 are impregnated with a catalytic coating R cat3 forming a reduction catalyst.
  • the R cat1 and R cat3 coatings have the same chemical composition with the exception that the R cat3 coating contains zeolites so that when the exhaust gases pass through the ducts 33 , the R cat3 coating accelerates the decomposition of urea into ammonia.
  • the internal structure of the filter 30 is such that, at equal volume with the filter 14 , the filter 30 is adapted to be impregnated with an amount of R cat3 coating per unit of volume greater than the filter 14 , while creating a pressure drop lower than the pressure drop created by the same volume of the particulate filter 14 .
  • the diameter of the ducts 33 is greater than the pore diameter of the inner walls of the particulate filter 14 .
  • the pressure drop generated by the filter 30 depends on the length of the filter 30 , the amount of coating impregnated in the walls 35 and the diameter of the ducts 33 .
  • the ducts 20 and 22 being closed off at one face of the filter 14 , the pressure drop generated by the filter 14 depends on the length of the filter 14 , the amount of impregnated coating, and the size of the pores of the porous walls.
  • the additional filter 30 is housed in the pipe 12 between the injector 28 and the particulate filter 14 .
  • the distance between the filters 14 and 30 is less than 20 millimeters, for example less than 10 mm.
  • the term “specific heat capacity of a material” means the energy that must be brought to a mass of 1 kg of that material to increase its temperature by one Kelvin.
  • the heat capacity is expressed in Joule. Kelvin ⁇ 1 .Kg ⁇ 1 .
  • the specific heat capacity of a material defines the ability of this material to absorb and release heat.
  • the heat capacity of the material of which the additional filter 30 is made is lower than the heat capacity of the material of which the particulate filter 14 is made.
  • the temperature inside the filter 30 reaches the temperature of “light-off” faster than the filter 14 .
  • Temperature of “light-off” means the starting temperature at which 50% of nitrogen oxides (NO x ) contained in the exhaust gases are reduced by the reduction catalyst coating. In these conditions, reduction of nitrogen oxides (NO x ) is carried out faster in the filter 30 than in the filter 14 , which allows cleaning the exhaust gases sooner when starting the engine 6 .
  • the length of the filter 30 is advantageously between 2 cm and 10 cm, for example, between 5 cm and 10 cm.
  • the filter 30 is a cordierite monolith.
  • the exhaust line 8 also comprises sensors 36 and 38 for the amount of NO x contained in the exhaust gases, respectively, upstream of the filter 30 and downstream of the filter 14 .
  • the exhaust line 8 finally includes a calculating unit 40 that is structured and operable to:
  • the unit 40 is made from a programmable electronic calculator capable of executing instructions stored on a data recording medium 42 .
  • the unit 40 is connected to the data recording medium 42 containing instructions for the execution of a control method of the sensors 36 , 38 and the injector 28 .
  • the filters 14 and 30 can include one or more of the following: cordierite, SiC, B 4 C, Si 3 N 4 , BN, AlN, Al 2 O 3 , ZrO 2 , mullite, Al titanate, ZrB 2 , and Sialon.
  • the R cat1 coating can also be acid.
  • the catalyst does not necessarily include a material from the platinum group.
  • Other catalysts can be used in addition to, or replacement.
  • the catalyst can be one of the following precious metals: gold (Au), and/or silver (Ar).
  • the catalyst can also include alkali metals, alkaline earth metals, lanthanide metals, actinide metals, transition metals, and/or perovskites.
  • a transition metal can be scandium (Se), titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu) or zinc (Zn).
  • the catalyst does not necessarily include a material from the platinum group.
  • other catalysts can be used in addition to, or replacement.
  • the catalyst can be one of the following precious metals: gold (Au), and/or silver (Ar).
  • the catalyst can also comprise transition metals, alkali metals, alkaline earth metals, lanthanide metals, hydrocarbon traps such as zeolites or clay, actinide metals, and/or perovskites.
  • the injector can be placed upstream of the turbocharger.
  • reducing agents other than urea can be used.
  • the catalytic coatings R cat1 and R cat3 can be of the same chemical composition.
  • the sensors 36 , 38 can be omitted.
  • the unit 40 can control the injector 28 from pre-stored formulas or tables.
  • the engine is not necessarily a diesel type engine.
  • the engine can be a gasoline type engine.
  • the particulate filter 14 can be impregnated in order to implement the functions of a three-way catalyst.

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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)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Catalysts (AREA)
US13/978,846 2011-01-11 2011-12-06 Internal combustion engine exhaust line Abandoned US20130276432A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR1150211 2011-01-11
FR1150211A FR2970294B1 (fr) 2011-01-11 2011-01-11 Ligne d'echappement pour un moteur a combustion interne
PCT/FR2011/052878 WO2012095573A1 (fr) 2011-01-11 2011-12-06 Ligne d'echappement pour un moteur a combustion interne

Publications (1)

Publication Number Publication Date
US20130276432A1 true US20130276432A1 (en) 2013-10-24

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US13/978,846 Abandoned US20130276432A1 (en) 2011-01-11 2011-12-06 Internal combustion engine exhaust line

Country Status (5)

Country Link
US (1) US20130276432A1 (zh)
EP (1) EP2663748B1 (zh)
CN (1) CN103314192B (zh)
FR (1) FR2970294B1 (zh)
WO (1) WO2012095573A1 (zh)

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US20160001214A1 (en) * 2014-07-03 2016-01-07 Yun-Yueh Chen Maneuverable air purification device
WO2016184774A1 (en) * 2015-05-19 2016-11-24 Haldor Topsøe A/S Method, multifunctional filter and system for the removal of particulate matter and noxious compounds from engine exhaust gas

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FR3017899A1 (fr) * 2014-02-24 2015-08-28 Peugeot Citroen Automobiles Sa Structure de filtration d'un gaz et de reduction des oxydes d'azote
CA2995834A1 (en) * 2015-08-17 2017-02-23 St Ip Holding Ag Honokiol and magnolol formulations with increased stability and improved uptake, and methods of use thereof

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US20100175372A1 (en) * 2009-01-09 2010-07-15 Christine Kay Lambert Compact diesel engine exhaust treatment system
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US20060153761A1 (en) * 2003-01-02 2006-07-13 Daimlerchrysler Ag Exhaust gas aftertreatment installation and method
US20040254073A1 (en) * 2003-06-11 2004-12-16 Ming Wei Multiple washcoats on filter substrate
US20090031711A1 (en) * 2004-07-24 2009-02-05 Tillman Braun Exhaust gas system, especially for an internal combustion engine of a motor vehicle
US20060179825A1 (en) * 2005-02-16 2006-08-17 Eaton Corporation Integrated NOx and PM reduction devices for the treatment of emissions from internal combustion engines
US20110179777A1 (en) * 2008-07-09 2011-07-28 Johnson Matthey Public Limited Company Exhaust system for a lean burn ic engine
DE102008055890A1 (de) * 2008-11-05 2010-05-12 Süd-Chemie AG Partikelminderung mit kombiniertem SCR- und NH3-Schlupf-Katalysator
US20110229391A1 (en) * 2008-11-05 2011-09-22 Sud-Chemie Ag Particle reduction with combined scr and nh3 slip catalyst
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160001214A1 (en) * 2014-07-03 2016-01-07 Yun-Yueh Chen Maneuverable air purification device
WO2016184774A1 (en) * 2015-05-19 2016-11-24 Haldor Topsøe A/S Method, multifunctional filter and system for the removal of particulate matter and noxious compounds from engine exhaust gas
JP2018521258A (ja) * 2015-05-19 2018-08-02 ハルドール・トプサー・アクチエゼルスカベット 粒子状物質および有害化合物をエンジン排気ガスから除去するための方法、多機能フィルタおよびシステム
US10279313B2 (en) 2015-05-19 2019-05-07 Umicore Ag & Co. Kg Method, multifunctional filter and system for the removal of particulate matter and noxious compounds from engine exhaust gas

Also Published As

Publication number Publication date
FR2970294B1 (fr) 2012-12-28
FR2970294A1 (fr) 2012-07-13
CN103314192B (zh) 2016-03-02
CN103314192A (zh) 2013-09-18
WO2012095573A1 (fr) 2012-07-19
EP2663748B1 (fr) 2015-06-17
EP2663748A1 (fr) 2013-11-20

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