CN100416052C - Exhaust system for a lean-burn ic engine - Google Patents

Exhaust system for a lean-burn ic engine Download PDF

Info

Publication number
CN100416052C
CN100416052C CNB038195003A CN03819500A CN100416052C CN 100416052 C CN100416052 C CN 100416052C CN B038195003 A CNB038195003 A CN B038195003A CN 03819500 A CN03819500 A CN 03819500A CN 100416052 C CN100416052 C CN 100416052C
Authority
CN
China
Prior art keywords
filter
metal
cigarette ash
middle filtrator
catalyzer
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.)
Expired - Fee Related
Application number
CNB038195003A
Other languages
Chinese (zh)
Other versions
CN1675454A (en
Inventor
M·V·特维格
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.)
Johnson Matthey PLC
Original Assignee
Johnson Matthey PLC
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 Johnson Matthey PLC filed Critical Johnson Matthey PLC
Publication of CN1675454A publication Critical patent/CN1675454A/en
Application granted granted Critical
Publication of CN100416052C publication Critical patent/CN100416052C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F01N3/24—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 constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2807—Metal other than sintered metal
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/80—Chemical processes for the removal of the retained particles, e.g. by burning
    • B01D46/82—Chemical processes for the removal of the retained particles, e.g. by burning with catalysts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/88—Handling or mounting catalysts
    • B01D53/885—Devices in general for catalytic purification of waste gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
    • 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
    • F01N13/0093—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 the purifying devices are of the same type
    • 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
    • F01N13/0097—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 the purifying devices are arranged in a single housing
    • 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
    • F01N3/022—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 characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • 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
    • F01N3/022—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 characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • F01N3/0222—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 characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, e.g. honeycombs
    • 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
    • F01N3/0231—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 special exhaust apparatus upstream of the filter for producing nitrogen dioxide, e.g. for continuous filter regeneration systems [CRT]
    • 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
    • F01N3/031—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 having means for by-passing filters, e.g. when clogged or during cold engine start
    • 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
    • F01N3/08—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
    • F01N3/24—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 constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2825—Ceramics
    • F01N3/2828—Ceramic multi-channel monoliths, e.g. honeycombs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/10—Oxidants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/10—Oxidants
    • B01D2251/104—Ozone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/102—Platinum group metals
    • B01D2255/1021—Platinum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/202—Alkali metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/206—Rare earth metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20723—Vanadium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/209—Other metals
    • B01D2255/2092—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/01—Engine exhaust gases
    • B01D2258/012—Diesel engines and lean burn gasoline engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/01—Engine exhaust gases
    • B01D2258/014—Stoichiometric gasoline engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
    • B01D2279/30—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for treatment of exhaust gases from IC Engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
    • B01J23/42—Platinum
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/28—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a plasma reactor
    • 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
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
    • 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
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/06—Ceramic, e.g. monoliths
    • 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
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/12—Metallic wire mesh fabric or knitting
    • 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
    • F01N2410/00—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device
    • F01N2410/10—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device for reducing flow resistance, e.g. to obtain more engine power

Abstract

An exhaust system for a lean-burn internal combustion engine comprises a filter ( 30, 36 ) for particulate matter and means ( 24 ) for generating an oxidant more active than molecular oxygen for combusting particulate matter disposed on the filter ( 30, 36 ), wherein the filter ( 30, 36 ) comprises a mass of elongate flat, narrow strip metal.

Description

The vent systems that is used for poor internal combustion engine
Technical field
The present invention relates to a kind of vent systems that is used for poor internal combustion engine, particularly be used to handle the system that contains cigarette ash gas.
Background technique
The cigarette ash that adopts ceramic wall streaming filter to filter in the engine exhaust has been feasible by confirming well, and also less the gaining public acceptance of the use of metal-based filters.Especially at US-A-4,270,936 and US-A-4,902,487 and at SAE paper 820184 (Enga etc.) and 890404 (Cooper discloses metal-based filters in Thoss).As if they reach leading conceptual phase in " catalytic trap oxygenant (Catalytic Trap Oxidiser) " (" CTO ") of JohnsonMatthey, but it can't successfully be competed with wall-flow filter on the commercial market mutually.We have developed such system recently, can use metal-based filters primely in this system.
Summary of the invention
According to the invention provides a kind of vent systems that is used for poor internal combustion engine, described internal-combustion engine contains exhaust treatment system, and this exhaust treatment system contains the metal filled soot filter of the flat fillet of useful a large amount of elongations and contain that being used for is used to burn the ratio oxygen molecule (O that is collected in the cigarette ash on the filter 2) device of more active oxygenant.
In this " elongation " is for the width of flat strip metal.Term " narrow " also can correspondingly be explained like this.
Also mean " compressing " and " compression " in this " filling ".
The waste gas of discharging from such motor usually contains the cigarette ash (or particulate matter (PM)) of gaseous state composition, without hydrocarbon (HC), carbon monoxide (CO), nitrogen oxide (NOx), the carbon dioxide (CO of burning 2), water vapor (H 2O), O 2And nitrogen (N 2).Remove the preferred continuous operation of the device that is collected in the cigarette ash on the filter by burning.Compare O 2More active oxygenant for example is ozone and/or plasma, and only is NO 2At least in part by for example in the NO component of NO-oxidation catalyst catalytic oxidation NO x and such NO preferably is provided 2, NO-oxidation catalyst load platinum on the alumina particle carrier at filter upper reaches for example wherein.Such catalyzer can be carried on flat, the fillet metal base through filling, the type of this metal base can be expediently be used in filter in type consistent, but fill with lower filling density, pass through to allow soot particulates.
In addition or additionally the filter packing can have one deck may relate to NO to be oxidized to NO 2The catalyzer that is used for soot oxidation of mechanism.Such soot oxidation catalyst comprises through the platinum group metal of carrying, for example on aluminium oxide and/or alkali metal such as La/Cs/V 2O 5On platinum.If NOx is not enough to continuous burning cigarette ash in the gas that motor is discharged, so can be for example by introducing plasma or NOx or nitric acid, these may be to introduce more NOx by the gas that the ammonia on the oxidation launch vehicle generates.
Ozone and/or plasma can pass through suitable device, take place as UV light source and/or corona discharge assembly.Be appreciated that plasma and/or ozone can be oxidized to NO with NO 2In one embodiment, vent systems contains to be useful on and ozone and/or plasma takes place and as the device of the oxidation catalyst of NO.
The external structure of filter can have the characteristics that operational advantage is provided.For example it can form an overall structure, and can easily insert reactor shell or extract out from reactor shell.No matter be overall structure whether, it all can be arranged to the tubular article that inserts or extract out easily in shell.It can conduct electricity on the whole, so it can electric heating when cold starting.If filter is arranged in the shell, such electric conductivity is used to constitute overall structure by the local welding between adjacent strip.Described tubular article can contain an axial metallic rod as an electrode in the described welding process, and shell is as another electrode.Other external features is below described.
The metal of filter should be able to hold out against the condition of waste gas treatment process.Because metallic filter can be than the easier replacing of porcelain filter, and its material can reclaim repeated use, so the working life of filter needn't be so long as the working life of porcelain filter.Can be expected at the interior filter of changing of common defects liability period of launch vehicle.
Usually metal is corrosion resistant ferro-alloy.Typical alloy contains nickel and chromium and the micro constitutent that contains just like at 300 types or 400 type stainless steels.Adopt which kind of alloy will depend on that whether exhaust treatment system is need be under rich condition of short duration work, some stainless steels are unsettled under this condition.For various exhaust gas constituents, preferred ferro-alloy contains at least 11.5% Cr, 4% Al and the micro constitutent of 0.02-0.25%, as rare earth, zirconium or hafnium.Metal in the filter can be the different mixtures of forming, and contains the component that conductive bridge or welding function are provided probably.
Filter integral body or part can have regular texture, as that reel, weaving or braiding.The metal bar of filter can be for example high to 2, particularly the width of 0.1-0.5mm.It should be enough thick in can bear the mechanical strength under its service condition.Usually, its thickness is the 0.2-0.8 of its width.The suitable geometrical surface of unit length be the identical weight metal circular cross sections area 1.2-1.5 doubly.It is the suitable product that flattens circular-section wire.Metal in the filter component can be the mixing of bar size, can also contain as the circular-section wire without attachment portion that flattens or the additional subassembly of conduct.In one embodiment, flat fillet metal is a flattened wire.
Can select filling density so that the filtration in the system and/or the aspiration level of back pressure to be provided, filling density can be by the width of flat metal bar and thickness and is determined.Yet we think common 2.5-30%v/v, and for example the filling density of 5-15%v/v can provide desired result.We have used 10% filling density primely.
Catalyst coatings on filter generally comprises oxide carrier coating (washcoat), and described oxide for example is possible have rare earth and active material particularly Pt or the aluminium oxide of Pd or the oxide of Cs and V.Coating can contain perovskite.If adopt the catalytic oxidation of NO, the catalyzer on the described carrier coating generally comprises Pt and/or Pd.If employing ozone, generator wherein can be corona discharge tubes for example, by this pipe, described two electrodes keep very big voltage difference to air between two electrodes; Generator or can comprise high-power lamps.If using plasma, plasma generator can be worked by for example coronal discharge, surface plasma discharge or insulative barriers discharge so, or contains insulation filling bed or electron beam reactor.It can strengthen by electromagnetic radiation such as microwave radiation.Generator can be handled air or all waste gas or such gas of part before or after handling.
Filter is with respect to the size of motor and be used for arbitrarily introducing and compare O 2The device of more active additional oxygenant is the theme of design feature.Under the simplest situation, filter capacity is enough big, so that cigarette ash is burnt continuously by oxygenant, just any gathering all in slow running promptly removed at quick run duration; Overall trend is continuous burning.Its design of more not expensive filter capacity should be able to be held bigger cigarette ash and gathers, and it is poor to be enough to remarkable boost pressure before the quick run duration of the next one.Such filter preferably contains branch road, and it is poor that the pressure difference by this branch road equals to design maximum allowable pressure.The motor that described branch road has been avoided being caused by excessive pressure difference casts anchor or hangs down power, but it allows some soot emissions to go in the atmosphere.In order to solve such soot emissions, can be at the downstream of branch road equipment second portion such as filter or impact collector and/or oxidation catalyst.Not or the branch road with second portion filter and/or oxidation catalyst can be the constituent element of filter tubular thing.
The direction that gas stream is crossed filter and/or oxidation catalyst (if you are using) can be or have with total flow direction component linear or horizontal.Lateral flow can be symmetry for example, particularly in cylindrical filter towards the outflow opening inner shaft to, perhaps in filter oval section or rectangle towards the high-pressure area.Also can be unidirectional cross flow one in addition.
In another detailed process and system, continuous filter cell has represented different cigarette ash Processing capacities to gas, for example collects more and more littler particle, and/or the catalytic environment of classification is provided.Preferably, the gas flow in the order ingress in the filter cell is transverse to total flow direction, or has a branch.Make the cigarette ash experience oxygenant more active than oxygen molecule if processing procedure and system comprise, continuous filter cell can use oxidation catalyst in turn and/or provide plasma or the device of ozone.(if you are using) oxidation catalyst can be ceramic in continuous like this filter cell forward.
A kind of useful especially system comprises with backward order and manyly is used for progressively catching the metal-based filters of more and more littler particle and optionally at least one is used to catch more short grained wall-flow filter.The hole of wall-flow filter can be littler than the hole of the wall-flow trap of single-stage in this system, because the metal-based filters of front has been removed larger particles, described larger particles may stop up or block them, has just reduced flowing through of gas.Any or all filters can be by catalysis.
In addition or in addition can special NO-oxidation catalyst be set in the upstream of first filter at least.Can have regeneration NO in the such catalysis on the filter and/or between filter 2The effect of content, described NO 2Content may be because reduce with the cigarette ash reaction in the filter in front.Filter and, if any, catalyzer can be in tubular article as independent unit assembling.Such NO-oxidation catalyst can be carried on the base material that fluid passes through, as base material pottery or metal.
According to a further aspect in the invention, the invention provides a system in accordance with the present invention, wherein than O 2More active oxygenant is ozone, plasma or NO 2In at least a.
Exhaust treatment system can contain other as single unit system used or that proposed, as three-way catalyst (TWC), nitrogen oxide (NOx) grabber+reclaimer, as adopting hydrocarbon or ammonia as the selective catalytic reduction device (SCR) of reducing agent, poor-NOx catalysis, the reproducible or disposable grabber of oxysulfide (SOx).Motor and system can contain and be useful on control gear and as the On-Board Diagnostics (OBD) device commonly used or that adapt to of the present invention new feature of control vent systems work to reduce discharging.
Poor burn engine can be any soot-laden motor that produces now or potentially.For example motor can be a compression ignition engine, as diesel engine, or spark ignition engines such as poor combustion petrol engine, directly inject (GDI as gasoline TM) motor.Motor can have exhaust gas recirculation (EGR).It can be light-duty or heavy.In order to reach SO low in the waste gas 2Content, fuel used S content should be less than 500, especially less than 50ppm w/w.Generation is less than 20ppm SO 2The low S fueling and the lubricant oil of waste gas be preferred.
Description of drawings
In order to understand the present invention more fully, with embodiment embodiment of the present invention are described with reference to the accompanying drawings, wherein:
Fig. 1 illustrates a kind of diesel engine with vent systems with schematic cross-section;
Fig. 2 show handle back waste gas in the vent systems of launch vehicle branch's ingress temperature and the outlet port temperature to the plotted curve of time, it also shows the speed of launch vehicle;
Fig. 3 is by being used for the partial cross section figure of exhaust treatment system of the present invention;
Fig. 4 shows the column diagram for exhaust treatment system 1,2 and 3 granular masss that record in a drive cycle; With
Fig. 5 shows the NO that vent systems comprises the tailpipe of system 1,2 and 3 2Mode (by second continuously) analysis chart.
Embodiment
Referring to Fig. 1, legend 10 expressions have the 4-cylinder diesel engine of air inlet 12 and fuel inlet 14, is that about 30 ratio adds the hydrocarbon that contains 5ppm sulphur and is used for smooth running from fuel inlet with the weight ratio of air/fuel, but it can change for day-to-day operation.Engine exhaust 16 import to be typically expressed as 18 have the insulation inwall 20 cylindrical treatment reactor in.Filter cartridge 22 closely is installed in the wall 20.Catalyst bed 24 is arranged on the inlet end of tube 22 and has occupied the whole diameter of tube, it is filled with the 310 STAINLESS STEEL WIRE braided fabrics that flatten, the wire width of described pressing is 0.33 mm, thickness is 0.2 mm, 6% solid specific volume, it has alumina washcoat and is 70-100 (1.98-2.83gm based on the bed volume density -3) even may be up to 300g/ft 3(8.50gm -3) Pt, it is flame-out to be used for low temperature.Tube 22 forward next zone has around the annular of first filter 30 supplies with flattened wire identical in groove 28, the first filters 30 usefulness as the bed 24 with the filling of 12% volume by volume and have carrier coating and soot oxidation catalyst.Filter 30 has the axial inside air-flow of outlet of flowing to 32.Supply with groove 28 and stop to branch road 34 at length direction, its function will be explained below.Forward next zone is second filter 36, and it has the air-flow of length direction.The axle center of filter 36 is metallic rod 38, and its function will be explained below.Identical flattened wire is filled with 16% volume by volume in filter 36 usefulness as the bed 24, and has soot oxidation catalyst, as La/Cs/V 2O 5Filter 30 and/or 36 can be during fabrication by adopting axially outlet or axial bar 38 to fix as some electric welding in another electrode as an electrode, external boundary member respectively.Around filter 36 are bypass channel 40.Branch road 34 and 40 illustrates to contain to express possibility with shade and hinders the material that flows, the pressure difference that it can the balance filtration device when filter partly contains cigarette ash.Replacement or the soot oxidation catalyst on filter 36, between filter, can have to be similar to 24 second oxidation catalyst.
During operation, the NO major part that enters in bed 24 the waste gas is oxidized to NO 2Cigarette ash in the gas is by bed 24 and be left on the filter 30, this its by NO 2Be oxidized to CO.If filter 30 designs do not reach requirement or motor produces excessive cigarette ash not normally, cigarette ash accumulates in the filter and hinders the gas stream mistake so.In when design, just pre-determining, so that recover or adopt remedial measures and make motor to work on up to soot-oxidising condition because during pressure difference level that such obstruction causes, branch road 34 allows gases by vent systems.If cigarette ash is focused to design level in filter 36 similarly, bypass channel 40 allows gas to pass through so.
Filter as 30 and 36, and other possible continuously arranged filter has increased the geometric jacquard patterning unit surface of per unit volume in succession to catch more tiny particle or bypassed particle.If the soot concentration that enters much smaller than in first filtration step, so such continuous filter needn't contain branch road.Described other parts can contain aforesaid oxidation catalyst, in order to the NO that recovers to be reduced by cigarette ash on the filter in front 2Content.
Embodiment
The Audi TDI car of satisfied European 2 grades of laws and regulations requirements of one 2.5 liters, filling contains the diesel fuel of 50ppm sulphur and is equipped with the integral ceramic structure of a circulation, its diameter is that 5.66 inches (144mm) length are 9 inches (225mm), and hole density is 400 holes (62 hole cm per square inch -2), wall thickness be 6mil (mil-inch) (0.15mm).This car is placed on the standard chassis rolling road dynamometer, in 100 seconds, is accelerating to 120kph after 20 seconds the slow-speed, and keep this speed in all the other times of test.Reach the equilibrium temperature of 330-350 in the inlet temperature of other 300-400 rear catalyst second system.This car 20 fens kinds (Fig. 2) that under this temperature, turn round then.Particle be collected in two group filter paper on (per 10 minute kind one group) by standard method at these 20 minutes in the kind, in order to calculate the average grain weight in this test process.Measured nitrogen oxide (NO and the NO that supplies with in the integrally-built gas by chemiluminescence analysis and Fourier Transform Infra Red at described 20 minutes respectively in the kind 2) and the tail pipe gas after overall structure.This is with system's 1 sign.
Remove the overall structure of circulation and replace the circulation overall structure with same holes density and wall thickness that goes up 5.66 inches (144mm) long 4 inches (100mm) of diameter from car, it is coated with 75gft -3(2.6gl -1) platinum catalyst, connect the exposed circulation overall structure of a diameter 5.66 inches (144mm) long 4 inches (100mm) thereafter.Carry out identical test period and repeat above mensuration.This is with system's 2 signs.
Oxidation catalyst is replaced by the circulation overall structure of 5.66 inches (144mm) long 3 inches (76 mm) of diameter, and it is coated with 75gft -3(2.6gl -1) platinum, exposed overall structure is replaced by newly-designed particle trap.It comprises the packed bed that the STAINLESS STEEL WIRE that 0.10mm is wide and 0.05mm is thick braiding, that flatten constitutes, and it occupies the whole diameter at the catalyzer back side and nestles up catalyzer.The length overall of wire bed is 4 inches (100mm), and what filling density was that 10%v/v. joins with it is the circulation overall structure of diameter 5.66 inches (144mm) long 1 inch (25.4mm), and it is coated with 75gft -3(2.6gl -1) platinum (" catalyst film "), it nestles up the back side of the wire substrate of braiding.And then this catalyzer is the second weave yarn base material and exposed overall structure, and it has the first weave yarn base material size identical with catalyst film as the front.Fig. 3 shows this structure.So it is identical with aspect ratio with system 2 through the integrally-built total volume of the circulation of catalysis.This last system banner is a system 3.As to system 1 and 2, repeat identical drive cycle and mensuration.
Fig. 4 has summarized the granular mass that records for three systems in drive cycle.So in system 2, obtain the granular mass that reduced than " baseline " system 1 by adding oxidation catalyst, and be further improved by the wire bed that adds through filling, the wire bed through filling keeps a certain proportion of cigarette ash and the NO that allows to come out from first catalyzer 2With its reaction.System 2 is 13% with respect to the transformation efficiency of system 1 as can be seen, and system 3 is 38% with respect to the transformation efficiency of system 1.
Fig. 5 shows the tailpipe downstream NO three systems 2Mode (by second continuously) analysis chart.Have exposed integrally-built system 1 and have the low-down NO that is similar to from engine emission 2Discharging.Record higher NO in system 2 back 2Concentration because NO is oxidized on catalyzer, a small amount of react with cigarette ash but have only.In system 3, the NO that on first oxidation catalyst, forms 2With the cigarette ash reaction that is collected in first filter bed.Be not oxidized to NO by first filter and on second catalyzer at NO oxidized on first catalyzer 2Some also can be arranged by reaction NO 2The NO that+C → NO+CO generates reoxidizes.This NO 2With also unreacted NO in first filter 2Together with the cigarette ash reaction that is collected in second filter, thereby cause cigarette ash and the NO lower than system 2 2The tail gas level.Cross filter bed and the turbulent flow that causes has strengthened NO by air communication 2Reaction and the oxidation of NO on second catalyzer with cigarette ash.

Claims (20)

1. vent systems that is used for poor internal combustion engine, the catalyzer that it contains the metal filled soot filter of the flat fillet of useful a large amount of elongations and is positioned at the filter upstream, described catalyzer is used for NO is oxidized to NO 2, with at NO 2In the cigarette ash on filter, collected of burning, wherein on the metal base of the sort of type that in filter, adopted of catalyst carrier, but thereby this metal base fill with lower filling density and allow passing through of soot particulates.
2. according to the system of claim 1, it comprises a kind of exhaust treatment system, and this exhaust treatment system comprises a large amount of metal-based filters that is fit to catch continuously more and more littler particulate matter by the order that is from upstream to the downstream.
3. according to the system of claim 2, it comprises that at least one is used to catch the wall-flow filter of littler particle.
4. according to the system of claim 2 or 3, it is included in the overall structure of circulation between the metal-based filters or between every pair of metal-based filters.
5. according to the system of claim 4, overall structure wherein said or each circulation contains the NO oxidation catalyst, is used for recovering owing to reacting the NO that reduces with cigarette ash in the filter in front 2Content.
6. according to the system of one of claim 1-3, the capacity of its middle filtrator is enough to allow cigarette ash to pass through oxygenant to burn continuously.
7. according to the system of one of claim 1-3, thereby the amount of capacity that wherein designs filter can be assembled enough cigarette ash so that significantly boost pressure is poor before the quick operation period at the next one, described system contains branch road, and the pressure difference by branch road equals to design maximum and allows by the pressure difference of filter and cast anchor to avoid motor.
8. according to the system of claim 7, it comprises and is used for limiting the device that cigarette ash is discharged to atmosphere that this device comprises second portion, as the oxidation catalyst in filter or impact collector and/or branch road downstream.
9. according to the system of one of claim 1-3, its middle filtrator entirely or partly has the structure that rule is that reel, knitting or weave.
10. according to the system of one of claim 1-3, the metal of its middle filtrator is 300 types or 400 type stainless steels.
11. according to the system of one of claim 1-3, the metal of its middle filtrator comprises ferro-alloy, it contains the micro constitutent of 11.5%Cr, 4%Al and 0.02-0.25% at least.
12. according to the system of one of claim 1-3, the metal bar width height of its middle filtrator is to 2mm, thickness is the 0.2-0.8. of its width
13. system according to Claim 8, wherein flat, fillet metal is a flattened wire.
14. according to the system of one of claim 1-3, the packing of its middle filtrator has the catalyzer that one deck is used for soot oxidation.
15. according to the system of claim 14, its middle filtrator comprises the catalytic coatings of the carrier coating of the oxide with Pt or Cs and V.
16. according to the system of one of claim 1-3, it comprises the ozone of the cigarette ash that being used to is used for burning collects and/or the device of plasma on filter.
17. according to the system of claim 11, wherein said micro constitutent is rare earth, zirconium or hafnium.
18. according to the system of claim 12, the metal bar width of its middle filtrator is 0.1-0.5mm.
19. one kind comprises the internal-combustion engine according to each vent systems among the claim 1-18.
20. diesel engine according to claim 19.
CNB038195003A 2002-08-09 2003-08-08 Exhaust system for a lean-burn ic engine Expired - Fee Related CN100416052C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0218540.3 2002-08-09
GBGB0218540.3A GB0218540D0 (en) 2002-08-09 2002-08-09 Engine exhaust treatment

Publications (2)

Publication Number Publication Date
CN1675454A CN1675454A (en) 2005-09-28
CN100416052C true CN100416052C (en) 2008-09-03

Family

ID=9942027

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB038195003A Expired - Fee Related CN100416052C (en) 2002-08-09 2003-08-08 Exhaust system for a lean-burn ic engine

Country Status (8)

Country Link
US (1) US20060185352A1 (en)
EP (1) EP1540150A1 (en)
JP (1) JP2005535438A (en)
KR (1) KR20050062530A (en)
CN (1) CN100416052C (en)
AU (1) AU2003255762A1 (en)
GB (1) GB0218540D0 (en)
WO (1) WO2004015252A1 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4239992B2 (en) 2005-03-16 2009-03-18 トヨタ自動車株式会社 Gas purification device
US20060236680A1 (en) * 2005-04-26 2006-10-26 Wenzhong Zhang Method for regenerating a diesel particulate filter
US7340888B2 (en) * 2005-04-26 2008-03-11 Donaldson Company, Inc. Diesel particulate matter reduction system
JP2006336506A (en) * 2005-05-31 2006-12-14 Honda Motor Co Ltd Exhaust emission control device
US20100275586A1 (en) * 2005-12-01 2010-11-04 Hirohito Hirata Device for cleaning exhaust gas of internal combustion engine
US7862640B2 (en) 2006-03-21 2011-01-04 Donaldson Company, Inc. Low temperature diesel particulate matter reduction system
US20080041043A1 (en) * 2006-08-16 2008-02-21 Andersen Eric H Exhaust treatment devices and methods for reducing sound using the exhaust treatment devices
KR101379955B1 (en) * 2007-08-10 2014-03-28 에스케이이노베이션 주식회사 A Cascade Type DPF for Purifying Exhaust Gas
DE102008026178A1 (en) * 2008-05-30 2009-12-03 Deutz Ag High efficiency SCR catalyst
JP2011012563A (en) * 2009-06-30 2011-01-20 Toyota Industries Corp Exhaust gas purification system
WO2016028290A1 (en) * 2014-08-20 2016-02-25 Cummins Emission Solutions, Inc. Sulfur trioxide trap for use in preventing catalyst deactivation by ammonium sulfate/bisulfate
US10247070B2 (en) 2016-02-16 2019-04-02 Cummins Emission Solutions Inc. System and methods for reducing SOx gases in aftertreatment systems
CN106481392A (en) * 2016-12-13 2017-03-08 大连凯泓科技有限公司 Regeneration filter for fine granular thing
CN106703942A (en) * 2016-12-13 2017-05-24 大连凯泓科技有限公司 Regenerative filtering device
CN106762038A (en) * 2016-12-13 2017-05-31 大连凯泓科技有限公司 A kind of filter filter element

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4270936A (en) * 1980-01-18 1981-06-02 General Motors Corporation Coiled fibrous metallic material and coating for diesel exhaust particulate trap
US4464482A (en) * 1980-11-27 1984-08-07 Johnson Matthey Public Limited Company Three dimensional interstitial catalyst support and its manufacture
US4535588A (en) * 1979-06-12 1985-08-20 Nippon Soken, Inc. Carbon particulates cleaning device for diesel engine
WO1999044725A1 (en) * 1998-03-06 1999-09-10 Johnson Matthey Public Limited Company Improvements in emissions control
DE19923781A1 (en) * 1999-05-22 2000-12-07 Degussa Method and device for removing soot from the exhaust gas of a diesel engine
CN1318687A (en) * 2000-04-18 2001-10-24 丰田自动车株式会社 Exhaust purifier

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4181514A (en) * 1978-02-14 1980-01-01 Huyck Corporation Stitch knitted filters for high temperature fluids and method of making them
US4416674A (en) * 1980-10-27 1983-11-22 Texaco Inc. Filter for treating a particle-carrying gaseous stream
US4451441A (en) * 1981-01-27 1984-05-29 W. R. Grace & Co. Method for exhaust gas treatment
EP0061304A1 (en) * 1981-03-18 1982-09-29 Johnson Matthey Public Limited Company Three dimensional interstitial catalyst support, its manufacture and use
US4902487A (en) * 1988-05-13 1990-02-20 Johnson Matthey, Inc. Treatment of diesel exhaust gases
US5075274A (en) * 1989-03-15 1991-12-24 Kabushiki Kaisha Riken Exhaust gas cleaner
DE4016276C1 (en) * 1990-05-21 1991-06-20 Behr Gmbh & Co
JPH0949421A (en) * 1995-05-30 1997-02-18 Sumitomo Electric Ind Ltd Particulate trap for diesel engine
JPH0979024A (en) 1995-09-12 1997-03-25 Toyota Motor Corp Exhaust emission control device for diesel engine
DE19704147A1 (en) * 1997-02-04 1998-08-06 Emitec Emissionstechnologie Heat-resistant and regenerable filter body with flow paths
US5853437A (en) * 1997-07-18 1998-12-29 Peter; Klaus J. Self-cleaning and self-sealing particle filter
US6063150A (en) * 1997-07-18 2000-05-16 Rypos, Inc. Self-cleaning and self-sealing particle filter
US6013599A (en) * 1998-07-15 2000-01-11 Redem Corporation Self-regenerating diesel exhaust particulate filter and material
US6775972B2 (en) * 1998-10-09 2004-08-17 Johnson Matthey Public Limited Company Purification of exhaust gases
ATE224507T1 (en) * 1998-12-05 2002-10-15 Johnson Matthey Plc IMPROVEMENTS IN EXHAUST PARTICLE CONTROL
JP3566905B2 (en) * 2000-04-17 2004-09-15 日野自動車株式会社 Exhaust gas purification device
WO2001092694A1 (en) * 2000-06-01 2001-12-06 Blue Planet Co., Ltd. Apparatus for removing soot and nox in exhaust gas from diesel engines
GB0014620D0 (en) * 2000-06-16 2000-08-09 Johnson Matthey Plc Reactor
JP4889873B2 (en) * 2000-09-08 2012-03-07 日産自動車株式会社 Exhaust gas purification system, exhaust gas purification catalyst used therefor, and exhaust purification method
JP2002336627A (en) * 2001-05-15 2002-11-26 Mitsui & Co Ltd Apparatus for decreasing carbon particles
US6912847B2 (en) * 2001-12-21 2005-07-05 Engelhard Corporation Diesel engine system comprising a soot filter and low temperature NOx trap

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4535588A (en) * 1979-06-12 1985-08-20 Nippon Soken, Inc. Carbon particulates cleaning device for diesel engine
US4270936A (en) * 1980-01-18 1981-06-02 General Motors Corporation Coiled fibrous metallic material and coating for diesel exhaust particulate trap
US4464482A (en) * 1980-11-27 1984-08-07 Johnson Matthey Public Limited Company Three dimensional interstitial catalyst support and its manufacture
WO1999044725A1 (en) * 1998-03-06 1999-09-10 Johnson Matthey Public Limited Company Improvements in emissions control
DE19923781A1 (en) * 1999-05-22 2000-12-07 Degussa Method and device for removing soot from the exhaust gas of a diesel engine
CN1318687A (en) * 2000-04-18 2001-10-24 丰田自动车株式会社 Exhaust purifier

Also Published As

Publication number Publication date
GB0218540D0 (en) 2002-09-18
JP2005535438A (en) 2005-11-24
WO2004015252A1 (en) 2004-02-19
KR20050062530A (en) 2005-06-23
AU2003255762A1 (en) 2004-02-25
US20060185352A1 (en) 2006-08-24
EP1540150A1 (en) 2005-06-15
CN1675454A (en) 2005-09-28

Similar Documents

Publication Publication Date Title
CN100416052C (en) Exhaust system for a lean-burn ic engine
US6294141B1 (en) Emission control
US7430857B2 (en) Emissions control
EP1544426B1 (en) Apparatus for filtering and burning particulate matter
EP1947304B1 (en) Exhaust purifying system for internal combustion engine
US20100205936A1 (en) Exhaust gas-purifying apparatus and exhaust gas-purifying method
EP1262641B1 (en) Carbon particle reducing apparatus
CN112867563B (en) Exhaust gas purification system for gasoline engine
WO2007032564A1 (en) Exhaust gas clean-up system for internal combustion engine
CN112770836B (en) Exhaust gas purification system for gasoline engine
CN112867562B (en) Exhaust gas purification system for gasoline engine
CN112867561B (en) Exhaust gas purification system for gasoline engine
CN112867553B (en) Exhaust gas purification system for gasoline engine
EP0849444A2 (en) Particulate trap for a diesel engine
JP2002364338A (en) Method and device for removing particulate matter in exhaust gas discharged from internal combustion engine
WO1999010633A1 (en) Diesel exhaust aftertreatment system and process
US20050056977A1 (en) Apparatus for removing carbon particles from an exhaust gas stream of internal combustion engines
GUPTA et al. 341: Experimental investigation of impact of diesel particulate filter on performance and emissions of a bharat stage-1 CI engine

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
REG Reference to a national code

Ref country code: HK

Ref legal event code: DE

Ref document number: 1081625

Country of ref document: HK

C14 Grant of patent or utility model
GR01 Patent grant
REG Reference to a national code

Ref country code: HK

Ref legal event code: WD

Ref document number: 1081625

Country of ref document: HK

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20080903

Termination date: 20160808