DEVICE FOR THE TREATMENT OF EXHAUST GASES

HEATABLE PLASTIC TANK

NOX REDUCING FLOW ADSORPTION UNIT FOR COMBUSTION ENGINES

MOTOR DRIVEN VEHICLE WITH EMISSION CONTROL

STEERING METERING PUMP AGGREGATE

DEVICE AND PROCEDURE FOR BRINGING CELEBRATIONS A RAW MATERIAL OF A REDUCING AGENT OF A NITROGEN OXIDE INTO AN EXHAUST GAS

MEMORY FOR AN EXHAUST SUBSEQUENT TREATMENT MEDIUM OF A ABGASNACHB EHANDLUNGSEINRICHTUNG FOR VEHICLES WITH DIESEL COMBUSTION ENGINES

FAILURE DIAGNOSTIC DEVICE FOR EMISSION CONTROL SYSTEM AND FAILURE DIAGNOSTIC PROCEDURE FOR EMISSION CONTROL SYSTEM

DOSING SYSTEM FOR POLLUTANT REDUCTION IN MOTOR VEHICLE EXHAUST GASES

AMMONIA PRODUCER, VEHICLE AND PROCEDURE FOR THE PRODUCTION OF AMMONIA

ARRANGEMENT FOR THE REDUCTION OF NITROGEN OXIDES IN EXHAUST GASES

SYSTEM FOR THE STORAGE OF ENGINE EXHAUST ADDITIVES

DESULPHURISATION STRATEGY FOR NOX ADSORBENTS WITH REFORMERTEMPERATURVERWALTUNG

SLIDE FIT AND OFF-GAS TREATMENT MECHANISM

PROMOTION MODULE FOR SELECTIVE CATALYTIC REDUCTION

DEVICE AND PROCEDURE FOR THE CONTROLLING OF AN EXHAUST SUBSEQUENT TREATMENT SYSTEM

EMISSION CONTROL DEVICE

PARTICLE FILTER ARRANGEMENT AND PROCEDURE FOR THE CLEANING OF A PARTICLE FILTER

ENGINE EMISSION CONTROL DEVICE

SYSTEM FOR THE INTRODUCTION OF GAS TO THE ENGINE EXIT GAS LINE OF A MOTOR VEHICLE

UREA METERING UNIT

SYSTEM FOR STORING AN ADDITIVE AND TO ITS INJECTING INTO ENGINE EXHAUST GASES

HOLDING DEVICE FOR AN INJECTOR IN A WASTE GAS SYSTEM OF AN INTERNAL-COMBUSTION ENGINE

ARRANGEMENT FOR THE SUPPLY OF A MEDIUM INTO AN EXIT GAS LINE IN A COMBUSTION ENGINE

PROCEDURE FOR THE OPERATION OF A TEST CENTRAL METERING VALVE AND A DEVICE FOR THE EXECUTION OF THE PROCEDURE

RETAINING SEALS MATERIAL, EMISSION CONTROL DEVICE AND PROCEDURE FOR THE PRODUCTION OF AN EMISSION CONTROL DEVICE

UREA TANK FOR A TRANSPORT VEHICLE, UNIT, WHICH COVERS A DIESEL TANK AND THE UREA TANK

PROCEDURE AND CONTROL DEVICE FOR A WITH A SCR CATALYST EQUIPPED INTERNAL-COMBUSTION ENGINE

UREA CONTAINER FOR MOTOR VEHICLE

MOTOR VEHICLE CR SOLID MEMORY ARRANGEMENT

ARRANGEMENT FOR THE REDUCTION OF NITROGEN OXIDES IN EXHAUST GASES

DEVICE AND PROCEDURE FOR THE CLEANING OF AN EXHAUST GAS STREAM OF AN INTERNAL-COMBUSTION ENGINE, IN PARTICULAR AN LEAN-EXECUTABLE INTERNAL-COMBUSTION ENGINE

PROCEDURE FOR THE OPERATION OF A TEST CENTRAL METERING VALVE AND A DEVICE FOR THE EXECUTION OF THE PROCEDURE

PROCEDURE FOR THE OFF-GAS TREATMENT

PROCEDURE FOR THE OPERATION OF AN EXHAUST SUBSEQUENT TREATMENT SYSTEM

CATALYST COMPOSITION AND STRUCTURE FOR A IN AN EXHAUST GAS STREAM ARRANGEMENT THE SAME TRI LEVELS OF REFORMER

DOSING SYSTEM FOR A LIQUID MEDIUM, IN PARTICULAR UREA WATER SOLUTION

EXHAUST CLEANER FOR ENGINE

DEVICE FOR INJECTING A FLUID FOR AN OFF-GAS TREATMENT DEVICE

EXHAUST DISTANCE OF AN INTERNAL-COMBUSTION ENGINE AND A PLANT TO THE EMISSION CONTROL

NOX REINIGUNGSKATALYSATOR

ASSEMBLY ARRANGEMENT FOR A WASTE GAS SYSTEM

ACTIVE SWIMMING UREA HEATERS

WASTE GAS SYSTEM FOR INTERNAL-COMBUSTION ENGINES WITH LEAN MIXTURE BURN

DEVICE AND PROCEDURE FOR INJECTING LIQUID IN A GAS FLOW, AND THE DEVICE EXHIBITING SYSTEM FOR THE OFF-GAS TREATMENT OF VEHICLES

EMISSION CONTROL DEVICE FOR A COMBUSTION ENGINE

EMISSION CONTROL DEVICE

CONVEYER SYSTEM FOR A SCR SYSTEM

EMISSION CONTROL DEVICE FOR A COMBUSTION ENGINE

CATALYST SYSTEM TO THE DISTANCE OF NITROGEN OXIDE AND PROCEDURE FOR THE DISTANCE OF NITROGEN OXIDE

SEQUENTIAL HEATING DEVICE FOR LIQUID TANKS

PROCEDURE FOR THE CLEANING OF BURN FLUE GASES, THE NITROGEN OXIDES CONTAINING

IMPROVEMENTS DURING THE DIESEL PARTICLE DELIMITATION

PROCEDURE AND DEVICE FOR STORAGE AND SUPPLY OF AMMONIA FROM CELEBRATIONS A AMMONIA STORAGE MEDIUM

REDUCING AGENT TANK FOR MAKING AVAILABLE REDUCING AGENT AT AN EXHAUST SYSTEM WITH A STOP VALVE

VEHICLE OFF-GAS TREATMENT SYSTEMS

EMISSION CONTROL SYSTEM FOR A COMBUSTION ENGINE

PROCEDURE FOR THE TRANSFORMATION CELEBRATIONS OF A NITROGENOUS REDUCING AGENT INTO A GASEOUS PHASE FOR THE REDUCTION OF NITROGEN OXIDES IN EXHAUST GASES

STEERING METERING PUMP FOR A REDUCING AGENT

WASTE GAS EMISSION CONTROL SYSTEM FOR AN ENGINE AND A CONTROL PROCEDURE FOR IT

Exhaust treatment system for a dual repopulating engine

Abgasnachbehandlungssystem (1) für eine Dual-Fuel-Brennkraftmaschine (2) mit wenigstens einer Abgasnachbehandlungsvorrichtung (3) zur Nachbehandlung eines von der Brennkraftmaschine (2) emittierten Abgases wobei die Brennkraftmaschine (2) mit wenigstens zwei unterschiedlichen Kraftstoffen (D, G) betreibbar ist, einer Recheneinheit (4) zur Berechnung der Mengen und Kosten eines von der Brennkraftmaschine (2) verbrauchten Kraftstoffes (D, G) und eines von der Abgasnachbehandlungsvorrichtung (3) verbrauchten Reduktionsmittels (U), wobei die Recheneinheit (4) dazu konfiguriert ist, einen Betriebspunkt der Brennkraftmaschine (2) hinsichtlich der Kosten von Kraftstoff (D, G) und Reduktionsmittel (U) anzupassen, wobei die Recheneinheit (4) dazu ausgebildet ist, eine Substitutionsrate bei der Anpassung eines Betriebspunktes der Brennkraftmaschine (2) zu berücksichtigen.

CLEAN OF EXHAUST GASES FROM COMBUSTION PLANTS.

PROCEDURE AND DEVICE FOR THE CONVERSION OF A POLLUTANT IN AN EXHAUST GAS AT A CATALYST

PROCEDURE AND MECHANISM FOR THE DISMANTLING OF NITROGEN OXIDES IN AN EXHAUST GAS OF A COMBUSTION ENGINE

GAS TREATMENT WITH NOX SPECIFIC REACTANT

CATALYTIC WABENKÖPER FILTER WITH POROUS PARTITIONS

DIESEL WASTE GAS SYSTEM WITH CASE OF NITROGEN OXIDE

PROCEDURES FOR BRINGING A REDUCING AGENT OF A NITROGEN OXIDE INTO A GAS MIXTURE AND DEVICE FOR WOULD DRIVE THROUGH THE PROCEDURE

PROCEDURE FOR THE SELECTIVE REDUCTION OF NOX IN EXHAUST GAS

DIESEL ENGINE EMISSION CONTROL SYSTEM

MECHANISM TO THE CATALYTIC EMISSION CONTROL

PROCEDURE AND MECHANISM FOR THE CONTROLLING OF A COMBUSTION PLANT AND FOR THE CATALYTIC EMISSION CONTROL AS WELL AS COMBUSTION PLANT

DOSING SYSTEM

LIQUIDCOOLED A SPLASH

PROCEDURE AND DEVICE FOR THE CATALYTIC REDUCTION OF NITROGEN OXIDES IN THE EXHAUST GAS VERBRENNNUNGSANLAGE

REDUCING AGENT PUMP FOR AN EXHAUST SUBSEQUENT TREATMENT PLANT OF AN INTERNAL-COMBUSTION ENGINE

DEVICE FOR BRINGING AN AGGREGATE INTO AN EXHAUST GAS

PROCEDURE AS WELL AS DEVICE FOR THE DOSAGE OF THE INPUT OF A REDUCING AGENT IN THE EXHAUST OR EXHAUST AIR STREAM OF A COMBUSTION PLANT

MUFFLER

METHOD FOR THE REDUCTION OF THE POLLUTANT OUTPUT FROM A WITH A CASE OF PARTICLE PROVIDED DIESEL ENGINE

DEVICE FOR THE TREATMENT OF EXHAUST GASES

HEATABLE PLASTIC TANK

HEATABLE PLASTIC TANK

HEATABLE PLASTIC TANK

HEATABLE PLASTIC TANK

HEATABLE PLASTIC TANK

DEVICE FOR THE TREATMENT OF EXHAUST GASES

DEVICE FOR THE TREATMENT OF EXHAUST GASES

HEATABLE PLASTIC TANK

DEVICE FOR THE TREATMENT OF EXHAUST GASES

HEATABLE PLASTIC TANK

DEVICE FOR THE TREATMENT OF EXHAUST GASES

DEVICE FOR THE TREATMENT OF EXHAUST GASES

HEATABLE PLASTIC TANK

DEVICE FOR THE TREATMENT OF EXHAUST GASES

HEATABLE PLASTIC TANK

HEATABLE PLASTIC TANK

HEATABLE PLASTIC TANK

DEVICE FOR THE TREATMENT OF EXHAUST GASES

HEATABLE PLASTIC TANK

Dosing and mixing arrangement for use in exhaust aftertreatment

A method for causing exhaust gas flow to flow at least 270 degrees in a first direction about a perforated tube using a baffle plate having a main body with a plurality of flow-through openings and a plurality of louvers positioned adjacent to the flow-through openings. The method includes deflecting a first portion of the exhaust gas flow with the main body of the baffle plate. The method also includes allowing a second portion of the exhaust gas flow to flow through the flow-through openings of the baffle plate. The method also deflects the second portion of the exhaust gas flow at a downstream side of the main body with the louvers hereby causing the second portion of the exhaust gas flow to flow in the first direction about the perforated tube.

SINGLE MODULE INTEGRATED AFTERTREATMENT MODULE

A selective catalytic reduction system may include a single housing defining a single centerline axis. The selective catalytic reduction system may also include a diesel particulate filter disposed within the single housing and having a DPF center axis aligned with the single centerline axis. The selective catalytic reduction system may also include an SCR catalyst disposed within the single housing and having a center axis aligned with the single centerline axis. In some implementations, the diesel particulate filter may include one or more SiC filters. In some implementations, the SCR catalyst may include one or more extruded SCR catalysts. 123.-. (canceled)24. A system comprising:a housing having a centerline axis;a diesel particulate filter disposed within the housing and having a diesel particulate filter center axis aligned with the centerline axis;a selective catalytic reduction catalyst disposed within the housing downstream of the diesel particulate filter and having a center axis aligned with the centerline axis;a decomposition chamber disposed within the housing downstream of the diesel particulate filter and upstream of the selective catalytic reduction catalyst; anda reductant delivery system configured to dose reductant into the decomposition chamber.25. The system of claim 24 , wherein the diesel particulate filter comprises one or more SiC filters.26. The system of claim 24 , wherein the selective catalytic reduction catalyst comprises one or more extruded SCR catalysts.27. The system of claim 24 , wherein the housing has a single inlet and a single outlet.28. The system of claim 24 , wherein the diesel particulate filter is selectively removable from the housing through a service opening.29. The system of claim 24 , further comprising an exhaust noise attenuation component.30. The system of claim 24 , wherein a diameter of the decomposition chamber defined by the housing is the same as a diameter of the housing containing the diesel particulate ...

NOx SENSOR DIAGNOSTIC FOR AN EXHAUST AFTERTREATMENT SYSTEM

A method for diagnosing NOx sensors in an exhaust aftertreatment system includes suspending reductant dosing in an exhaust aftertreatment system; purging a reductant deposit in a selective catalytic reduction (SCR) system of the exhaust aftertreatment system; adjusting at least one of an ignition timing and an engine speed for an engine to adjust an engine out nitrogen oxide (NOx) amount; receiving measured SCR inlet NOx data from a SCR inlet NOx sensor and measured SCR outlet NOx data from a SCR outlet NOx sensor; determining a phase shift between the measured SCR inlet and SCR outlet NOx data; applying the determined phase shift to the SCR outlet NOx data; and determining a diagnostic feature based on the SCR inlet NOx data and the phase shifted SCR outlet NOx data regarding a state of the SCR inlet and outlet NOx sensors. 1. A method , comprising:suspending dosing in an exhaust aftertreatment system;commanding an engine to affect an engine out nitrogen oxide (NOx) amount;interpreting a measured SCR inlet NOx data from a SCR inlet NOx sensor;interpreting a measured SCR outlet NOx data from a SCR outlet NOx sensor;determining a phase shift between the measured SCR inlet NOx data and the measured SCR outlet NOx data and applying the phase shift to the measured SCR outlet NOx amount data; anddetermining a diagnostic feature based on the SCR inlet NOx data and the phase shifted SCR outlet NOx data by determining a state of the SCR inlet and outlet NOx sensors based on the diagnostic feature, and notifying a user of the state of the SCR inlet and outlet NOx sensors, the state including at least one of an operational state and that at least one of the SCR inlet and outlet NOx sensors are faulty.2. The method of claim 1 ,wherein the diagnostic feature includes a first diagnostic feature and a second diagnostic feature;wherein the first diagnostic feature is a gain diagnostic feature, the gain diagnostic feature representing a slope of a best fit line for the phase ...

EXHAUST TREATMENT APPARATUS AND METHOD

The present invention relates to an exhaust treatment apparatus () for an internal combustion engine (). The apparatus includes a catalyst chamber () containing a catalyst (). One or more exhaust gas inlets (A-D) are provided for supplying exhaust gases from the internal combustion engine () to the catalyst chamber (C). An exhaust gas outlet () for supplying exhaust gases from the catalyst chamber to a turbocharger (). An injection nozzle () is provided for introducing a reductant () into the exhaust gases between the catalyst () and the turbocharger (). The reductant () and the exhaust gases can undergo mixing as they pass through the turbocharger (). The catalyst () can have a three-dimensional open structure to facilitate the flow of exhaust gases. The invention also relates to a method of treating exhaust gases from an internal combustion engine (). 1. An exhaust treatment apparatus for an internal combustion engine , the apparatus comprising:a manifold chamber defined by an exhaust manifold and containing a catalyst;a plurality of exhaust gas inlets for supplying exhaust gases from the internal combustion engine to the manifold chamber;an exhaust gas outlet for supplying exhaust gases from the manifold chamber to a turbocharger; anda plurality of recesses, each of said recesses comprising an aperture extending partway through the catalyst substantially coincident with one of said exhaust gas inlets;wherein the catalyst has a three-dimensional open structure for facilitating a flow of exhaust gases from the exhaust gas inlets to the exhaust gas outlet.2. The exhaust treatment apparatus of claim 1 , wherein the three-dimensional open structure of the catalyst comprises one of the following: an open cell structure claim 1 , a porous structure claim 1 , a granular structure claim 1 , or a lattice structure.3. The exhaust treatment apparatus of claim 1 , further comprising an injection nozzle for introducing a reductant into the exhaust gases between the catalyst ...

INTEGRATED LOAD BANK AND EXHAUST HEATER SYSTEM WITH LOAD SHED CAPABILITY FOR A DIESEL GENSET EXHAUST AFTERTREATMENT SYSTEM

An integrated load bank and exhaust heater for a diesel genset exhaust aftertreatment system of the type having a diesel particulate filter (DPF) and a selective catalytic reduction (SCR) section. The load bank/heater can function as a load bank when testing the genset, as a heat source to optimize SCR efficiency, as to thermally regenerate the DPF filter. 115-. (canceled)16. A method of distributing power from a genset having an output power capacity to an electrical load powered by the genset and to a load bank/heater in an exhaust after treatment (AT) system coupled to the genset , the method including:delivering power from the genset to the electrical load;delivering power from the genset to the load bank/heater to heat exhaust from the genset;monitoring power demand on the genset while delivering power to the electrical load and the load bank/heater;determining whether the power demand of the electrical load is increasing at a high rate of change, wherein the high rate of change indicates that the power demand of the electrical load is projected to become greater than at least one of a selected output power capacity and a genset output power capacity; andreducing the amount of power applied to the load bank/heater in response to the electrical load power demand increasing at the high rate of change to preemptively shed load to prevent the power demand on the genset from becoming greater than at least one of the selected output power capacity and the genset output power capacity.17. The method of wherein reducing the amount of power applied to the load bank/heater includes discontinuing the application of power to the load bank/heater when the amount of power demanded by the electrical load about equals or exceeds the genset output power capacity or the selected output capacity.18. The method of wherein delivering power from the genset to the load bank/heater to heat exhaust from the genset further comprises delivering power from the genset to the load bank/ ...

ASYNCHRONOUS REDUCTANT INSERTION IN AFTERTREATMENT SYSTEMS

An aftertreatment system comprises a first SCR system, a second SCR system positioned downstream of the SCR system and a reductant storage tank. At least one reductant insertion assembly is fluidly coupled to the reductant storage tank. The at least one reductant insertion assembly is also fluidly coupled to the first SCR system and the SCR system. A controller is communicatively coupled to the reductant insertion assembly. The controller is configured to instruct the reductant insertion assembly to asynchronously insert the reductant into the first SCR system and the second SCR system. 1. A system for asynchronously delivering reductant from a reductant storage tank to a first selective catalytic reduction system and a second selective catalytic reduction system included in an aftertreatment system , comprising:a reductant insertion assembly fluidly coupled to the reductant storage tank, the reductant insertion assembly configured to be fluidly coupled to each of the first selective catalytic reduction system and the second selective catalytic reduction system; and 'instruct the reductant insertion assembly to asynchronously insert the reductant into the first selective catalytic reduction system and the second selective catalytic reduction system.', 'a controller configured to, 'a control module communicatively coupled to the reductant insertion assembly, the control module comprising2. The system of claim 1 , wherein the asynchronously inserting includes inserting the reductant only into the first selective catalytic reduction system or only into the second selective catalytic reduction system at any given time.3. The system of claim 1 , wherein the reductant insertion assembly includes:a first injector fluidly coupled to the first selective catalytic reduction system; anda second injector fluidly coupled to the second selective catalytic reduction system.4. The system of claim 3 , wherein the controller is further configured to:activate the first injector; ...

Methods Utilizing Non-Zeolitic Metal-Containing Molecular Sieves Having The CHA Crystal Structure

Catalysts comprising metal-loaded non-zeolitic molecular sieves having the CHA crystal structure, including Cu-SAPO-34, and methods for treating exhaust gas incorporating such catalysts are disclosed. The catalysts can be used to remove nitrogen oxides from a gaseous medium across a broad temperature range and exhibit hydrothermal stability at high reaction temperatures. 119-. (canceled)20. A catalyst comprising:an ion-exchanged Cu-SAPO-34 non-zeolitic molecular sieve having a CHA crystal structure; wherein the Cu content of the Cu-SAPO-34 non-zeolitic molecular sieve on a CuO basis is in the range of about 1% to about 5% by weight;{'sup': '2', 'wherein the Cu-SAPO-34 non-zeolitic molecular sieve has a BET surface area greater than 350 m/g;'}{'sub': 2', '2', '2', '3, 'sup': 3', '−1, 'wherein the catalyst is effective to promote the reaction of ammonia with nitrogen oxides (NOx) to form nitrogen and HO selectively in an exhaust gas stream at 200° C. when the catalyst has been deposited on a honeycomb substrate having a cell density of 400 cpsi at a loading between 2 and 2.5 g/inand tested at a space velocity of 80,000 hrwhere the feed stream comprises a mixture of 10% O, 5% HO, 500 ppm NO and 500 ppm NHto provide at least 80% NOx conversion; and'}{'sub': '2', 'wherein the catalyst is effective to make less than 5 ppm NO over a temperature range of 200° C. to 450° C.'}21. The catalyst of claim 20 , wherein the Cu-SAPO-34 non-zeolitic molecular sieve has a BET surface area in the range of 375 m/g to 600 m/g.22. The catalyst of claim 20 , wherein the Cu-SAPO-34 non-zeolitic molecular sieve contains a secondary metal.23. The catalyst of claim 22 , wherein the secondary metal comprises zirconium.24. The catalyst of claim 20 , wherein the Cu content of the Cu-SAPO-34 non-zeolitic molecular sieve on a CuO basis is in the range of about 2% to 4 by weight.25. The catalyst of claim 20 , wherein the catalyst is effective to provide at least about 85% NOx conversion in the ...

REMOTE FLUID SUPPLY FOR AN ENGINE

A system includes a first diesel engine operable to drive a first device, a first diesel exhaust fluid (“DEF”) tank associated with the first engine and operable to provide DEF to the first diesel engine during operation, a second diesel engine operable to drive a second device, a second DEF tank associated with the second engine and operable to provide DEF to the second diesel engine during operation, and an external DEF tank arranged to contain a quantity of DEF that is coupled to the first DEF tank and the second DEF tank and operable to selectively deliver DEF from the external DEF tank to each of the first DEF tank and the second DEF tank. 1. A system comprising:a first diesel engine operable to drive a first device;a first diesel exhaust fluid (“DEF”) tank associated with the first engine and operable to provide DEF to the first diesel engine during operation;a second diesel engine operable to drive a second device;a second DEF tank associated with the second engine and operable to provide DEF to the second diesel engine during operation; andan external DEF tank arranged to contain a quantity of DEF that is coupled to the first DEF tank and the second DEF tank and operable to selectively deliver DEF from the external DEF tank to each of the first DEF tank and the second DEF tank.2. The system of claim 1 , further comprising a pump operable to deliver DEF from the external DEF tank to each of the first DEF tank and the second DEF tank.3. The system of claim 1 , wherein the first device is a generator and the second device is a generator.4. The system of claim 2 , further comprising a first sensor coupled to the first DEF tank and operable to output a first signal indicative of a quantity of DEF within the first DEF tank claim 2 , and a second sensor coupled to the second DEF tank and operable to output a second signal indicative of a quantity of DEF within the second DEF tank.5. The system of claim 4 , wherein the first sensor is a liquid level sensor and the ...

SEPARATELY DETERMINING FIRING DENSITY AND PUMPING DENSITY DURING FIRING DENSITY TRANSITIONS FOR A LEAN-BURN INTERNAL COMBUSTION ENGINE

A skip fire engine controller and method of control is described wherein during transitions from a first firing density to a second firing density, a firing density and a pumping density are separately set so as to balance the conflicting demands of (a) torque control, (b) Noise, Vibration and Harshness (NVH), (c) air flow through the engine and (d) air-fuel ratio. 1. An engine controller in a vehicle for controlling a lean burn internal combustion engine , the controller configured to:determine a target firing density while operating the internal combustion engine at a first firing density, the target firing density suitable to meet a requested torque demand for the internal combustion engine;determine a firing density during the transition from the first firing density to the target firing density;determine a pumping density during the transition from the first firing density to the target firing density;operate the internal combustion engine during the transition by:selectively firing or not firing each firing opportunity in accordance with the determined firing density;for each firing opportunity which is not fired, selectively either (a) pumping or (b) not pumping air through the internal combustion engine in accordance with the determined pumping density.2. The engine controller of claim 1 , wherein the firing density and the pumping density through the transition are determined to meet the requested torque demand claim 1 , while balancing the demands of operation at an acceptable Noise claim 1 , Vibration and Harshness (NVH) level and minimizing exhaust emissions.3. The engine controller of claim 1 , further configured to separately adjust:the firing density to mitigate excessive NVH; andthe pumping density to mitigate excessive emissions caused by too much or too little air flow through the internal combustion engine.4. The engine controller of claim 1 , when the first firing density is greater than the target firing density claim 1 , further configured to: ...

REAGENT DOSER DIAGNOSTIC SYSTEM AND METHOD

Systems and methods are disclosed for determining or diagnosing a reagent dosing system failure to provide sufficient reagent to an exhaust aftertreatment system that includes an SCR catalyst to satisfy a reagent dosing command. 114.-. (canceled)15. A system comprising:a storage tank for storing a reagent;a doser fluidly connected to the storage tank and configured to receive reagent from the storage tank, wherein the doser is configured to be connected to an exhaust system and the doser comprises a pump operable to pressurize the reagent while injecting a predetermined quantity of the reagent into the exhaust system over a dosing cycle to satisfy a dosing command;a pressure sensor associated with the doser and operable to indicate a pressure of the reagent downstream of the pump;a controller connected to the pump and configured to operate the pump via feedback control from the pressure sensor to maintain a pressure of the reagent during the dosing cycle; identify a diagnostic dosing period in the dosing cycle during which to diagnose a fault condition of the dosing system in satisfying the dosing command,', 'suspend feedback control of the pump and maintain a constant speed of the pump while injecting reagent during the diagnostic dosing period, and', 'determine a fault condition of the dosing system in response to a pressure drop measured by the pressure sensor during the diagnostic dosing period., 'wherein the controller is further configured to16. The system of claim 15 , wherein the doser further comprises an accumulator downstream of the pump and the pressure sensor is connected to the accumulator.17. The system of claim 15 , wherein the doser is connected to an injector that is coupled to the exhaust system and operably connected to the controller.18. The system of claim 15 , wherein the controller is configured to determine that the fault condition of the dosing system is failed when the pressure drop is less than a predetermined threshold. Selective ...

EXHAUST TREATMENT SYSTEM AND METHOD FOR TREATMENT OF AN EXHAUST STREAM

An exhaust treatment system comprising: a first dosage device, arranged to supply a first additive into said exhaust stream; a first reduction catalyst device, downstream of said first dosage device arranged for reduction of nitrogen oxides in said exhaust stream through the use of said first additive; a particulate filter, at least partly comprising a catalytically oxidizing coating, which is downstream of said first reduction catalyst device to catch soot particles, and to oxidize one or several of nitrogen oxide and incompletely oxidized carbon compounds in said exhaust stream; a second dosage device, downstream of said particulate filter to supply a second additive into said exhaust stream; and a second reduction catalyst device, downstream of said second dosage device for a reduction of nitrogen oxides in said exhaust stream, with the use of at least one of said first and said second additive. 1. An exhaust treatment system , arranged for treatment of an exhaust stream , which results from a combustion in a combustion engine , said system comprising:a first dosage device, arranged to supply a first additive into said exhaust stream;{'sub': 'x', 'b': '1', 'a first reduction catalyst device, arranged downstream of said first dosage device, and arranged for reduction of nitrogen oxides NOin said exhaust stream through the use of said first additive, wherein said first reduction catalyst device comprises a first slip-catalyst (SC), arranged for at least one of a reduction of nitrogen oxides NOx and oxidation of a residue of additive in said exhaust stream;'}a particulate filter, at least partly comprising a catalytically oxidizing coating, which is arranged downstream of said first reduction catalyst device, and is arranged to catch and oxidize soot particles, and to oxidize one or several of nitrogen oxide NO and incompletely oxidized carbon compounds in said exhaust stream;a second dosage device, arranged downstream of said particulate filter, and arranged to ...

LEAN BURN INTERNAL COMBUSTION ENGINE EXHAUST GAS TEMPERATURE CONTROL

A variety of methods and arrangements for controlling the exhaust gas temperature of a lean burn, skip fire controlled internal combustion engine are described. In one aspect, an engine controller includes an aftertreatment system monitor and a firing timing determination unit. The aftertreatment monitor obtains data relating to a temperature of one or more aftertreatment elements, such as a catalytic converter. Based at least partly on this data, the firing timing determination unit generates a firing sequence for operating the engine in a skip fire manner such that the temperature of the aftertreatment element is controlled within its effective operating range. 1. A method of operating a lean burn internal combustion engine having one or more working chambers , the method comprising:selectively firing or skipping one or more working cycles of the one or more working chambers, wherein one of the one or more working chambers may be fired during one engine cycle and then skipped during the next engine cycle and selectively skipped or fired during the next engine cycle; andinjecting fuel during at least some of the skipped working cycles such that at least some of the injected fuel is introduced into an exhaust stream fluidly coupled to the one or more working chambers.2. The method as recited in claim 1 , further comprising claim 1 , injecting the fuel late in a power stroke of the skipped working cycle so that little or no combustion occurs resulting in uncombusted fuel in the exhaust stream.3. The method as recited in claim 1 , further comprising claim 1 , for a given skipped working cycle claim 1 , operating the corresponding working chamber by:opening an intake valve associated with the working chamber and inducting air into the working chamber during an intake stroke;closing the intake valve and an exhaust valve associated with the working chamber and compressing the inducted air during a compression stroke;initiating the power stroke and injecting the fuel late ...

Copper cha zeolite catalysts

Zeolite catalysts and systems and methods for preparing and using zeolite catalysts having the CHA crystal structure are disclosed. The catalysts can be used to remove nitrogen oxides from a gaseous medium across a broad temperature range and exhibit hydrothermal stable at high reaction temperatures. The zeolite catalysts include a zeolite carrier having a silica to alumina ratio from about 15:1 to about 256:1 and a copper to alumina ratio from about 0.25:1 to about 1:1.

EXHAUST SYSTEM WITH A MODIFIED LEAN NOx TRAP

An exhaust system for treating an exhaust gas from an internal combustion engine is disclosed. The system comprises a modified lean NOtrap (LNT), a urea injection system, and an ammonia-selective catalytic reduction (NH-SCR) catalyst. The modified LNT comprises platinum, palladium, barium, and a ceria-containing material, and has a platinum:palladium molar ratio of at least 3:1. The modified LNT stores NOat temperatures below about 200° C. and releases the stored NOat temperatures above about 200° C. The urea injection system injects urea at temperatures above about 180° C. 1. An exhaust system for treating an exhaust gas from an internal combustion engine , comprising:{'sub': 'x', '(a) a lean NOtrap (LNT), wherein the LNT comprises platinum, palladium, barium, and a ceria-containing material and the LNT has a platinum:palladium molar ratio of at least 3:1;'}(b) a urea injection system; and{'sub': '3', '(c) an ammonia-selective catalytic reduction (NH-SCR) catalyst,'}{'sub': '3', 'wherein there is no intervening catalysts between the LNT and the NH-SCR catalyst.'}2. (canceled)3. The exhaust system of wherein the LNT has a platinum:palladium molar ratio of at least 4:1.4. The exhaust system of wherein the LNT has a barium loading of greater than 150 g/ft.5. The method of wherein the LNT has a barium loading of greater than 400 g/ft.6. The exhaust system of wherein the NH-SCR catalyst is selected from the group consisting of a vanadia-titania catalyst claim 1 , a vanadia-tungsta-titania catalyst claim 1 , and a metal/zeolite.7. The exhaust system of wherein the metal/zeolite comprises a metal selected from the group consisting of iron or copper and a zeolite selected from the group consisting of a beta zeolite claim 6 , a faujasite claim 6 , an L-zeolite claim 6 , a ZSM zeolite claim 6 , an SSZ-zeolite claim 6 , a ferrierite claim 6 , a mordenite claim 6 , a chabazite claim 6 , an offretite claim 6 , an erionite claim 6 , a clinoptilolite claim 6 , a silicalite claim ...

EXHAUST SYSTEM WITH A MODIFIED LEAN NOx TRAP

An exhaust system for treating an exhaust gas from an internal combustion engine is disclosed. The system comprises a modified lean NOtrap (LNT), a urea injection system, and an ammonia-selective catalytic reduction catalyst. The modified LNT comprises a first layer and a second layer. The first layer comprises a NOadsorbent component and one or more platinum group metals. The second layer comprises a diesel oxidation catalyst zone and an NO oxidation zone. The diesel oxidation catalyst zone comprises a platinum group metal, a zeolite, and optionally an alkaline earth metal. The NO oxidation zone comprises a platinum group metal and a carrier. The modified LNT stores NOat temperatures below about 200° C. and releases at temperatures above about 200° C. The modified LNT and a method of using the modified LNT are also disclosed. 1. An exhaust system for treating an exhaust gas from an internal combustion engine , comprising a modified lean NOtrap (LNT) , a urea injection system , and an ammonia-selective catalytic reduction (NH-SCR) catalyst comprising copper and a zeolite selected from the group of Framework Type consisting of an AEI or a CHA , wherein the modified LNT stores NOat temperatures below about 200° C. and releases the stored NOat temperatures above about 200° C. and the modified LNT comprises:{'sub': 'x', '(a) a first layer comprising a NOadsorbent component and one or more platinum group metals selected from the group consisting of palladium, platinum, and mixtures thereof; and'}(b) a second layer comprising a diesel oxidation catalyst zone comprising a platinum group metal, a zeolite, and optionally an alkaline earth metal; and an NO oxidation zone comprising platinum group metal and a carrier.2. The exhaust system of claim 1 , wherein the urea injection system injects urea at temperatures above about 180° C.3. The exhaust system of claim 2 , wherein the NOadsorbent component comprises an alkaline earth metal claim 2 , an alkali metal claim 2 , a rare- ...

THERMALLY INTEGRATED COMPACT AFTERTREATMENT SYSTEM

A thermally integrated catalyst aftertreatment exhaust system includes a flow channel that directs diesel exhaust through a diesel oxidation catalyst unit that includes a diesel oxidation catalyst, by a doser that introduces DEF into the diesel exhaust, through a mixing chamber that includes a static metallic mixer coated with a DEF hydrolysis catalyst, and through an SCR unit that includes an SCR catalyst. The diesel oxidation catalyst converts a portion of diesel exhaust into water, carbon dioxide, or nitrogen dioxide. The DEF hydrolysis catalyst facilitates hydrolysis of the mixed DEF and diesel exhaust. The SCR catalyst facilitates reduction of NOx in the diesel exhaust. A first portion of the flow channel is in direct thermal contact with a second portion of the flow channel that houses the SCR unit such that heat from the diesel exhaust before the diesel exhaust reaches the doser is passed to the SCR unit. 1. A thermally integrated catalyst aftertreatment (TICA) exhaust system , comprising:a diesel oxidation catalyst unit comprising a diesel oxidation catalyst configured to convert a portion of diesel exhaust into one or more of water, carbon dioxide, or nitrogen dioxide;a doser configured to introduce diesel exhaust fluid (DEF) into the diesel exhaust;a selective catalytic reduction (SCR) unit comprising an SCR catalyst configured to facilitate reduction of nitrogen oxide (NOx) in the diesel exhaust with the NH3; anda flow channel configured to direct flow of the diesel exhaust from the diesel oxidation catalyst unit, to the doser and to the SCR unit, wherein a first portion of the flow channel is in direct thermal contact with a second portion of the flow channel that houses the SCR unit such that heat from the diesel exhaust is passed to the SCR unit,wherein the first portion of the flow channel and the second portion of the flow channel are located around a perimeter of the SCR unit such that the flow channel is configured to direct flow of the diesel ...

Device and method at an exhaust afterteatment system for an engine

A method at an exhaust gas cleaning system for an engine ( 235 ) in which a reducing agent is added to a passage ( 290 ) for exhaust gases from the engine ( 235 ) for cleaning the exhaust gases. The exhaust gas cleaning system includes arrangements ( 270 ) that require a certain temperature level (Tmax) in order to achieve catalytic exhaust gas cleaning. The method is to distribute and store (s 430 ) a limited amount of reducing agent at temperature level (Tmax); and to use (s 440 ) during a cold start of the exhaust gas cleaning system, the distributed and stored reducing agent to achieve the catalytic exhaust gas cleaning. Also a computer program product ( 200; 210 ) to implement the method. Also an arrangement for an exhaust gas cleaning system for an engine ( 235 ), and a motor vehicle ( 100 ) equipped with the arrangement.

MOUNTING AFTERTREATMENT SYSTEMS FROM SERVICE JOINTS

An apparatus comprises a housing including a housing first portion having a first joint portion configured to overlap a second joint portion of a housing second portion so as to form a housing joint. A primary clamp is positioned at a primary location of the housing joint which abuts at least a portion of the first and the second joint portion. A mounting bracket is positioned on and contacts the primary clamp. A plurality of secondary clamps are positioned at secondary locations, each of which is different than the primary location, of the housing joint. A band is operatively coupled to the mounting bracket by positioning around and contacting each of the plurality of secondary clamps. The band is tightened to urge the mounting bracket and thereby the primary clamp, and the plurality of secondary clamps towards the housing joint to secure the housing joint. 1. A method of securing a housing joint of a housing , the housing comprising a housing first portion and a housing second portion , the housing first portion including a first joint portion configured to overlap a second joint portion of the housing second portion so as to form the housing joint , the method comprising:positioning a primary clamp at a primary location of the housing joint so that the primary clamp abuts at least a portion of the first joint portion and the second joint portion;positioning a mounting bracket on the primary clamp such that the mounting bracket contacts the primary clamp;operatively coupling a band to the mounting bracket, the band comprising a band first portion and a band second portion separate from the band first portion;positioning a plurality of secondary clamps at a plurality of secondary locations of the housing joint so that the plurality of secondary clamps abut at least a portion of the first joint portion and the second joint portion, each of the plurality of secondary locations being different than the primary location;positioning the band around each of the plurality ...

APPARATUS FOR PURIFYING EXHAUST GAS

A regeneration method of an apparatus of purifying an exhaust gas including a catalytic converter which is disposed on an exhaust pipe and includes a lean NOx trap (LNT) device in which a first LNT catalyst is coated and a catalyzed particulate filter (CPF) in which a second LNT catalyst is coated may include determining whether a nitrogen oxide (NOx) amount absorbed in the LNT device is greater than a threshold NOx amount, determining whether a temperature of the LNT device is higher than a first predetermined temperature when the NOx amount absorbed in the LNT device is greater than the threshold NOx amount, and regenerating, both of the LNT device and the CPF or only the LNT device according to a temperature of the CPF when the temperature of the LNT device is higher than the first predetermined temperature. 17-. (canceled)8. An apparatus for purifying an exhaust gas , comprising:a catalytic converter disposed on an exhaust pipe and including a lean NOx trap (LNT) device in which a first LNT catalyst is coated and a catalyzed particulate filter (CPF) in which a second LNT catalyst is coated, the LNT device and the CPF being sequentially disposed in the catalytic converter; anda controller determining or detecting an inlet lambda of the LNT device, an outlet lambda of the LNT device, and an outlet lambda of the CPF, determining or detecting a temperature of the LNT device and a temperature of the CPF, determining nitrogen oxide (NOx) amounts absorbed in the LNT device and the CPF, and controlling regeneration of the LNT device and the CPF,wherein the controller performs the regeneration of the LNT device and the CPF according to the temperature of the LNT device and the temperature of the CPF when the NOx amount absorbed in the LNT device is greater than a threshold NOx amount, andthe controller performs regeneration of both of the LNT device and the CPF when the temperature of the LNT device is higher than a first predetermined temperature and the temperature of ...

CATALYZED SCR FILTER AND EMISSION TREATMENT SYSTEM

Provided is a catalyst article for simultaneously remediating the nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The catalyst article has a soot filter coated with a material effective in the Selective Catalytic Reduction (SCR) of NOx by a reductant, e.g., ammonia. 1. A catalyst article consisting essentially of a wall flow monolith and a catalytic material , wherein the wall flow monolith has a plurality of longitudinally extending passages fatined by longitudinally extending walls bounding and defining said passages , wherein the passages comprise inlet passages having an open inlet end and a closed outlet end , and outlet passages having a closed inlet end and an open outlet end , the wall flow monolith has a porosity of from 50% to 60% and an average pore size of from 10 to 25 microns , and the wall flow monolith contains the catalytic material;{'sup': '3', 'wherein the catalytic material comprises an SCR catalyst composition including a slurry-loaded washcoat of a zeolite and base metal selected from one or more of a copper and iron component, the washcoat permeating the walls at a loading up to 2.4 g/in, the wall flow monolith having integrated, NOx and particulate removal efficiency in which presence of the catalytic material in the wall flow monolith catalyzes the oxidation of soot.'}2. The catalyst article of claim 1 , wherein the SCR catalyst composition permeates the walls of the monolith at a concentration of at least 1.3 g/in.3. The catalyst article of claim 2 , wherein there is from 1.6 to 2.4 g/inof SCR catalyst composition disposed on the wall flow monolith.4. The catalyst article of claim 1 , wherein the SCR catalyst composition is effective to catalyze the reduction of NOx at a temperature below about 600° C. and is able to aid in regeneration of the wall flow monolith by lowering the temperature at which soot captured by the wall flow monolith is combusted.5. The catalyst article of ...

Recirculating Exhaust Treatment Fluid System

An exhaust treatment fluid system includes a tank housing for storing an exhaust treatment fluid. A suction tube includes a first end positioned within the housing. A first sensor is positioned within the tank housing for determining at least one of a fluid level and a concentration of the exhaust treatment fluid. A skirt is positioned in the tank to peripherally surround the first sensor. 1. An exhaust treatment fluid system , comprising:a tank housing for storing an exhaust treatment fluid;a suction tube having an end positioned within the tank housing;a first sensor positioned in the tank housing for determining at least one of a fluid level and a concentration of the exhaust treatment fluid; anda skirt positioned in the tank housing, wherein the tank housing includes a region defined by an interior of the skirt, the first sensor being positioned within the region.2. The exhaust treatment fluid system of claim 1 , wherein the skirt is fixed to an interior wall of the tank housing.3. The exhaust treatment fluid system of claim 1 , wherein the first sensor includes an ultrasonic sensor.4. The exhaust treatment fluid system of claim 1 , further comprising a second sensor positioned in the tank housing claim 1 , wherein the first sensor determines the fluid level and the second sensor determines the concentration of the exhaust treatment fluid.5. The exhaust treatment fluid system of claim 4 , wherein the second sensor is disposed proximate the first sensor.6. The exhaust treatment fluid system of claim 5 , wherein at least one of the first and second sensors is coupled to the suction tube.7. The exhaust treatment fluid system of claim 1 , wherein the skirt peripherally surrounds the first sensor.8. The exhaust treatment fluid system of claim 1 , further comprising an elongated laminar flow device secured to a discharge port of the tank housing such that exhaust treatment fluids flow along surfaces thereof as the exhaust treatment fluid is returned to the tank ...

METHOD OF CORRECTING CONTROL LOGIC OF SELECTIVE CATALYTIC REDUCTION CATALYST AND EXHAUST SYSTEM USING THE SAME

Disclosed are a method of correcting a control logic of a selective catalytic reduction (SCR) catalyst and an exhaust system. The control logic may be adapted to calculate an injection amount of a reducing agent for the SCR catalyst at the least. The method may include detecting input variables including temperature of the SCR catalyst and exhaust flow rate, discretizing the input variables, standardizing the discretized input variables, determining whether the discretized input variables are within a correction range, and correcting the control logic of the SCR catalyst if the discretized input variables are within the correction range. 17-. (canceled)8. An exhaust system comprising:an engine adapted to generate exhaust gas while burning fuel and air;an intake pipe connected to and supplying the air to the engine;an exhaust pipe connected to the engine, the exhaust gas flowing through the exhaust pipe;an SCR catalyst mounted on the exhaust pipe and adapted to reduce nitrogen oxide contained in the exhaust gas using a reducing agent;a reducing agent supplier mounted on the exhaust pipe between the engine and the SCR catalyst and adapted to inject the reducing agent;an input variable detector adapted to detect input variables; anda controller including a control logic for calculating an injection amount of the reducing agent for the SCR catalyst at the least and adapted to control the reducing agent supplier according to the injection amount of the reducing agent,wherein the controller is adapted to discretize the input variables, to standardize the discretized input variables, and to correct the control logic if the discretized input variables are within a correction range.9. The exhaust system of claim 8 , wherein the controller corrects the control logic when a time for which the discretized input variables are within the correction range is longer than or equal to a predetermined time.11. The exhaust system of claim 10 , wherein the controller standardizes the ...

DIAGNOSTIC METHODS FOR A HIGH EFFICIENCY EXHAUST AFTERTREATMENT SYSTEM

A method includes interpreting NOx data indicative of an amount of NOx exiting an engine and an amount of NOx exiting an exhaust aftertreatment system coupled to the engine, determining a NOx conversion efficiency fault is present based on the amount of NOx exiting the engine and the amount of NOx exiting the exhaust aftertreatment system, and determining at least one of a selective catalytic reduction (SCR) catalyst of the exhaust aftertreatment system and a diesel particulate filter having a coating of a SCR reaction catalyst (DPF-SCR) of the exhaust aftertreatment system are responsible for the NOx conversion efficiency fault based on at least one of a reductant slip amount and a NOx conversion value across at least one of the SCR catalyst and the DPF-SCR. 1. A method , comprising:interpreting, by a processing circuit, nitrogen oxide (NOx) data indicative of an amount of NOx exiting an engine and an amount of NOx exiting an exhaust aftertreatment system coupled to the engine;determining, by the processing circuit, a NOx conversion efficiency fault is present based on the amount of NOx exiting the engine and the amount of NOx exiting the exhaust aftertreatment system; anddetermining, by the processing circuit, at least one of a selective catalytic reduction (SCR) catalyst of the exhaust aftertreatment system or a diesel particulate filter having a coating of a SCR reaction catalyst (DPF-SCR) of the exhaust aftertreatment system are responsible for the NOx conversion efficiency fault based on at least one of a reductant slip amount or a NOx conversion value across at least one of the SCR catalyst or the DPF-SCR.2. The method of claim 1 , further comprising determining claim 1 , by the processing circuit claim 1 , the DPF-SCR is faulty responsive to the reductant slip amount across the DPF-SCR being greater than an expected amount of reductant slip across the DPF-SCR.3. The method of claim 2 , further comprising interpreting claim 2 , by the processing circuit claim ...

NH3 OVERDOSING-TOLERANT SCR CATALYST

Catalysts having a blend of platinum on a support with low ammonia storage with a Cu-SCR catalyst or an Fe-SCR catalyst are disclosed. The catalysts can also contain one or two additional SCR catalysts. The catalysts can be present in one of various configurations. Catalytic articles containing these catalysts are disclosed. The catalytic articles are useful for selective catalytic reduction (SCR) of NOx in exhaust gases and in reducing the amount of ammonia slip. Methods for producing such articles are described. Methods of using the catalytic articles in an SCR process, where the amount of ammonia slip is reduced, are also described. 1. A catalytic article comprising a substrate having an inlet and outlet and coated with a first coating comprising a blend of (a) platinum on a molecular sieve support with low ammonia storage with (b) a first SCR catalyst; a second coating comprising a second SCR catalyst; wherein the second coating at least partially overlaps the first coating , where the ratio of the amount of the first SCR catalyst to the amount of platinum on the support with low ammonia storage is in the range of 10:1 to 50:1 , inclusive , based on the weight of these components.2. The catalytic article of claim 1 , wherein the first SCR catalyst is a Cu-SCR catalyst or a Fe-SCR catalyst.3. The catalytic article of claim 1 , where the second coating completely overlaps the first coating.4. The catalyst article of claim 1 , wherein the second coating overlaps at least 20% of the length of the first coating along an axis from the inlet to the outlet.5. The catalytic article of claim 1 , where the support comprises a silica or a zeolite with silica-to-alumina ratio of at least one of: (a) ≥100 claim 1 , (b) ≥200 claim 1 , (c) ≥250 claim 1 , ≥300 claim 1 , (d) ≥400 claim 1 , (e) ≥500 claim 1 , (f) ≥750 and (g) ≥1000.6. The catalyst of claim 1 , where the blend further comprises at least one of palladium (Pd) claim 1 , gold (Au) claim 1 , silver (Ag) claim 1 , ...

PLANETARY GEAR SYSTEM ARRANGEMENT WITH AUXILIARY OIL SYSTEM

A method of designing a gas turbine engine includes configuring a speed reduction device for driving a fan and configuring a lubrication system for lubricating components across a rotation gap. The lubrication system includes a lubricant input. A stationary first bearing receives lubricant from the lubricant input and has a first race in which lubricant flows. A second bearing for rotation is within the first bearing. The second bearing has a first opening in registration with the first race such that lubricant may flow from the first race through the first opening into a first conduit. The first bearing is configured to also include a second race into which lubricant flows. The second bearing has a second opening in registration with the second race such that lubricant may flow from the second race through the second opening into a second conduit. The first and second conduits deliver lubricant to distinct locations. 1. A method of designing a gas turbine engine comprising:configuring a speed reduction device for driving a fan;configuring a lubrication system for lubricating components across a rotation gap, the lubrication system including a lubricant input, a stationary first bearing receiving lubricant from said lubricant input and having a first race in which lubricant flows, and a second bearing for rotation within said first bearing, said second bearing having a first opening in registration with said first race such that lubricant may flow from said first race through said first opening into a first conduit; andconfiguring said first bearing to also include a second race into which lubricant flows, and said second bearing having a second opening in registration with said second race such that lubricant may flow from said second race through said second opening into a second conduit, with said first and second conduits delivering lubricant to distinct locations.2. The method of claim 1 , wherein said first bearing and said second bearing are centered about a ...

Highly Selective NOx Sensor in the Presence of NH3

An improved NOsensor with an NHoxidation. A sensor module may include a support component, a NOsensing material positioned on the support component, and an NHoxidation catalyst. The NHoxidation catalyst may be layered on top of the NOsensing material or the NHoxidation catalyst may be positioned upstream of he NOsensing material such that the NHoxidation catalyst selectively converts NHto Nwhile permitting NOthrough to the NOsensing material. 121.-. (canceled)22. A NOx sensor comprising:a support component comprising a sample chamber;a NOx sensing material positioned on a first portion of an interior of the sample chamber; andan NH3 oxidation catalyst positioned on a second portion of the interior of the sample chamber, the second portion being upstream of the NOx sensing material with respect to gas entering the sample chamber.23. The NOx sensor of claim 22 , further comprising:a heating element configured to modify a temperature of the NH3 oxidation catalyst.24. The NOx sensor of claim 22 , wherein the first portion of the sample chamber is insulated relative to the second portion such that claim 22 , when the heating element modifies the temperature of the NH3 oxidation catalyst claim 22 , the temperature of the NH3 oxidation catalyst is different than a temperature of the NOx sensing material.25. The NOx sensor of claim 22 , wherein the NH3 oxidation catalyst is spaced apart from the NOx sensing material.26. The NOx sensor of claim 22 , wherein the NH3 oxidation catalyst comprises an extruded catalyst.27. The NOx sensor of claim 22 , wherein the NH3 oxidation catalyst comprises a coated substrate.28. The NOx sensor of claim 22 , wherein the NH3 oxidation catalyst is affixed within the sample chamber and spaced apart from the NOx sensing material.29. The NOx sensor of claim 22 , wherein the NH3 oxidation catalyst coats a portion of an interior of the sample chamber.30. The NOx sensor of claim 22 , wherein the NOx sensing material comprises a ceramic type metal ...

PLANETARY GEAR SYSTEM ARRANGEMENT WITH AUXILIARY OIL SYSTEM

In an embodiment of the present disclosure, a gas turbine engine includes a fan, a first compressor stage and a second compressor stage, a first turbine stage and a second turbine stage, and wherein said first turbine stage drives said second compressor stage as a high spool, and wherein said second turbine stage drives said first compressor stage as part of a low spool, and a gear train driving said fan with said low spool, and such that said fan and said first compressor stage rotate in the same direction, and wherein said high spool operates at higher pressures than said low spool. 130-. (canceled)31. A gas turbine engine comprising:a fan section,a first compressor stage and a second compressor stage;a first turbine stage and a second turbine stage, wherein said first turbine stage drives said second compressor stage as a high spool, and wherein said second turbine stage drives said first compressor stage as a low spool; anda planetary gear train having at least one planetary gear, a sun gear, a ring gear fixed from rotation relative to an engine static structure, a carrier supporting said at least one planetary gear, said carrier driving said fan section, wherein said ring gear has a recess configured to balance force transmitted through the ring gear;wherein said low spool drives said fan section via said planetary gear train.321. The gas turbine engine of claim , wherein said carrier and said sun gear rotate in the same direction.332. The gas turbine engine of claim , wherein said carrier drives said fan , and said fan and said first compressor stage rotate in the same direction.343. The gas turbine engine of claim , wherein said recess is radially outward of gear teeth on said ring gear.354. The gas turbine engine of claim , wherein said ring gear comprises a first gear portion with a first set of teeth and a second gear portion with a second set of teeth , and wherein said recess comprises a first half-recess in the first gear portion and a second half- ...

Variable spray angle injector arrangement

An injector, comprising, an injector body comprising, an inner wall that defines an injector cavity for fluid, at least one inlet channel into the injector cavity, and at least one outlet channel from the injector cavity, a plunger that defines at least one passageway between the injector cavity and the at least one outlet channel, the plunger being movable longitudinally in the injector cavity between at least: a first open arrangement in which the at least one passageway is positioned to direct fluid into the at least one outlet channel at a first position, and a second open arrangement in which the at least one passageway is positioned to direct fluid into the at least one outlet channel at a second position different from the first position.

SINGLE MODULE INTEGRATED AFTERTREATMENT MODULE

A selective catalytic reduction system may include a single housing defining a single centerline axis. The selective catalytic reduction system may also include a diesel particulate filter disposed within the single housing and having a DPF center axis aligned with the single centerline axis. The selective catalytic reduction system may also include an SCR catalyst disposed within the single housing and having a center axis aligned with the single centerline axis. In some implementations, the diesel particulate filter may include one or more SiC filters. In some implementations, the SCR catalyst may include one or more extruded SCR catalysis. 123-. (canceled)24. A system comprising:a housing having a centerline axis; a first filter; and', 'a second filter separated from the first filter and located downstream of the first filter;, 'a diesel particulate filter disposed within the housing and having a diesel particulate filter center axis aligned with the centerline axis, the diesel particulate filter comprisinga sensor coupled to the housing between the first filter and the second filter, the sensor configured to detect a characteristic of exhaust gas between the first filter and the second filter;a selective catalytic reduction catalyst disposed within the housing downstream of the diesel particulate filter and having a center axis aligned with the centerline axis;a decomposition chamber disposed within the housing downstream of the diesel particulate filter and upstream of the selective catalytic reduction catalyst; anda reductant delivery system configured to dose reductant into the decomposition chamber.25. The system of claim 24 , wherein at least one of the first filter or the second filter claim 24 , comprises a SiC filter.26. The system of claim 24 , wherein the selective catalytic reduction catalyst comprises one or more extruded SCR catalysts.27. The system of claim 24 , wherein the housing has a single inlet and a single outlet.28. The system of claim 24 , ...

CATALYSED SUBSTRATE MONOLITH

A catalysed substrate monolith for use in treating exhaust gas emitted from a lean-burn internal combustion engine, which catalysed substrate monolith comprising a first washcoat coating and a second washcoat coating wherein the first washcoat coating comprises a catalyst composition comprising at least one platinum group metal (PGM) and at least one support material for the at least one PGM, wherein at least one PGM in the first washcoat coating is liable to volatilise when the first washcoat coating is exposed to relatively extreme conditions including relatively high temperatures, wherein the second washcoat coating comprises at least one metal oxide for trapping volatilised PGM and wherein the second washcoat coating is oriented to contact exhaust gas that has contacted the first washcoat coating. 120.-. (canceled)21. A substrate monolith comprising:a first washcoat comprising a catalyst material disposed on a first support material, wherein the catalyst material comprises at least one platinum group metal; anda second washcoat comprising a metal that is either Pd or a mixture or alloy comprising Au and Pd, wherein the metal supported on a second support material comprising zirconia;wherein the second washcoat is adjacent to the first washcoat and arranged to contact the exhaust gas after the exhaust gas has contacted the catalytic material.22. The substrate monolith of claim 21 , wherein the catalyst material of the first washcoat comprises platinum (Pt).23. The substrate monolith of claim 21 , wherein the catalyst material of the first washcoat comprises both platinum (Pt) claim 21 , and palladium (Pd).24. The substrate monolith of claim 23 , wherein the Pt and Pd are present in a ratio by mass of Pt to Pd in a range of from 1:1 to 5:1.25. The substrate monolith of claim 21 , wherein the catalyst material is present in the first washcoat in a range of from 1 g ftto 500 g ft.26. The substrate monolith of claim 21 , wherein the second support material is ...

AMMONIA SLIP CATALYST DESIGNED TO BE FIRST IN AN SCR SYSTEM

Catalyst articles having an ammonia slip catalyst (ASC) comprising a blend of platinum on a support with low ammonia storage and a first SCR catalyst, and a second catalyst, such as a diesel oxidation catalyst, a diesel exotherm catalyst (DEC), a NOx absorber, a selective catalytic reduction/passive NOx adsorber (SCR/PNA), a cold-start catalyst (CSC) or a three-way catalyst (TWC) are disclosed. The catalyst articles can also contain one or two additional SCR catalysts. The catalysts can be present in one of various configurations. The catalytic articles are useful for selective catalytic reduction (SCR) of NOx in exhaust gases and in reducing the amount of ammonia slip. Methods of using the catalytic articles in an SCR process, where the amount of ammonia slip is reduced, are also described. 1. A method of treating an exhaust gas , comprising contacting the exhaust gas with a catalyst article comprising a substrate comprising an inlet end and an outlet end , a first zone and a second zone , where the first zone comprises an ammonia slip catalyst (ASC) comprising a platinum group metal and a first SCR catalyst comprising a metal exchange molecular sieve , vanadium or a base metal , and the second zone comprises a second catalyst selected from the group consisting of a diesel oxidation catalyst (DOC) , a diesel exotherm catalyst (DEC) , a catalyzed soot filter (CSF) , a NOx absorber , a selective catalytic reduction/passive NOx adsorber (SCR/PNA) , a cold-start catalyst (CSC) or a three-way catalyst (TWC) , where the first zone is located upstream of the gas flow relative to the second zone.2. The method of claim 1 , where the first zone and the second zone are located on the same substrate and the first zone is located on the inlet side of the substrate and the second zone is located on the outlet side of the substrate.3. The method of claim 1 , further comprising a second substrate claim 1 , where the first zone is located on a first substrate and the second zone is ...

SYSTEM AND METHOD FOR THE MONITORING AND CONTROLLING OF EMISSIONS FOR MULTIPLE ENGINES

A method includes determining, by a controller, a total emissions amount from a plurality of engines; comparing, by the controller, the total emissions amount to a predetermined threshold, wherein the predetermined threshold includes an alert value, an adjustment value, and a deactivation value, the deactivation value being greater than the adjustment value, which is greater than the alert value; deactivating, by the controller, at least one engine in response to the total emissions amount being at or greater than the deactivation value; adjusting, by the controller, operation of at least one engine in the plurality of engines in response to the total emissions amount being at or greater than the adjustment value but less than the deactivation value; and providing, by the controller, an alert in response to the total emissions amount being at or greater than the alert value but less than the adjustment value. 1. An apparatus , comprising:an emissions module structured to interpret data indicative of an emissions amount from a plurality of engines;an emissions threshold module structured to aggregate the emissions amount from each engine in the plurality of engines to determine a total emissions amount from the plurality of engines and compare the total emissions amount to a predetermined threshold, wherein the predetermined threshold includes an alert value, an adjustment value, and a deactivation value, the deactivation value being greater than the adjustment value, which is greater than the alert value;an engine module structured to control operation of at least one engine in the plurality of engines; andan aftertreatment system control module structured to control a component in an aftertreatment system associated with one or more engines in the plurality of engines responsive to the comparison of the total emissions amount to the predetermined threshold;wherein in response to the total emissions amount being at or greater than the deactivation value, the engine ...

Air curtain for urea mixing chamber

An exemplary embodiment includes a blending chamber having a urea inlet, a blending chamber gas inlet, and a blending chamber outlet. A urea source provides a pressurized urea solution to the urea inlet at a urea injection pressure, and a pressurized gas source transmits pressurized gas to the blending chamber gas inlet via a passageway. The passageway is configured to decrease pressure of the pressurized gas transmitted along its length from a first pressure of gas received from the pressurized gas source to a second pressure of gas provided to the blending chamber gas inlet. The first pressure of gas received from the pressurized gas source is greater than the urea injection pressure and the second pressure of gas provided to the blending chamber gas inlet is less than the urea infection pressure.

DIESEL EXHAUST FLUID MIXING BODY USING VARIABLE CROSS-SECTION SWITCHBACK ARRANGEMENT

An aftertreatment system includes a filter configured to receive an exhaust gas and a selective catalytic reduction (SCR) system configured to treat the exhaust gas. A body mixer is disposed downstream of the filter and upstream of the SCR system. The body mixer includes a housing defining an internal volume and including at least a first passageway, a second passageway, and a third passageway. The first passageway receives a flow of the exhaust gas from the filter and directs the flow of the exhaust gas towards the second passageway. The second passageway redirects the flow in a second direction opposite the first direction towards the third passageway. The third passageway redirects the flow in a third direction opposite the second direction towards the SCR system. An injection port is disposed on a sidewall of the housing and configured to communicate an exhaust reductant into the internal volume. 121.-. (canceled)22. A method of promoting mixing of a reductant with an exhaust gas flowing through an aftertreatment system including at least a selective catalytic reduction system , comprising;positioning a mixer upstream of the selective catalytic reduction system, the mixer including a housing defining an internal volume, the housing including at least a first passageway, a second passageway, a third passageway and an injection port defined on a sidewall of the housing proximate to the first passageway;inserting the reductant into the first passageway via the injection port; andflowing the exhaust gas into the first passageway, the first passageway structured to direct the flow in a first direction towards the second passageway, the second passageway structured to redirect the flow in a second direction substantially opposite the first direction towards the third passageway, and the third passageway structured to redirect the flow in a third direction substantially opposite the second direction towards the selective catalytic reduction system.23. The method of ...

NOx TRAP

A NOtrap catalyst is disclosed. The NOtrap catalyst comprises a noble metal, a NOstorage component, a support, and a first ceria-containing material. The first ceria-containing material is pre-aged prior to incorporation into the NOx trap catalyst, and may have a surface area of less than 80 m/g. The invention also includes exhaust systems comprising the NOtrap catalyst, and a method for treating exhaust gas utilizing the NOtrap catalyst. 120-. (canceled)21. A NOx trap catalyst comprising a first layer , the first layer comprising a first ceria-containing component having a surface area of less than 80 m/g , a Ba/Ce/magnesium-aluminate spinel; platinum; palladium; and alumina; anda second layer, the second layer comprising a second ceria-containing component having a higher surface area than the first ceria-containing component present in the first layer; rhodium; and alumina; anda substrate.22. The NOx trap catalyst of claim 21 , wherein the first ceria-containing material has a surface area of 40-75 m/g.23. The NOx trap catalyst of claim 22 , wherein the first ceria-containing material has a surface area of 55-70 m/g.24. The NOx trap catalyst of claim 21 , wherein the second layer further comprises platinum.25. The NOx trap catalyst of claim 21 , wherein the substrate is a flow-through monolith or a filter monolith.26. An emission treatment system for treating a flow of a combustion exhaust gas comprising the NOx trap catalyst of .27. The emission treatment system of claim 26 , further comprising a selective catalytic reduction catalyst system claim 26 , a particulate filter claim 26 , a selective catalytic reduction filter system claim 26 , a passive NOx adsorber claim 26 , a three-way catalyst system claim 26 , or combinations thereof. The invention relates to a NOtrap for exhaust systems for internal combustion engines, and a method for treating an exhaust gas from an internal combustion engine.Internal combustion engines produce exhaust gases containing a ...

System, method, and apparatus for aftertreatment system monitoring

A method includes determining whether a urea refill event is detected, and clearing a quality accumulator value and clearing a latching abort command. The method includes determining whether urea fluid quality check abort conditions are met, and clearing the urea quality accumulator, latching the abort command, and exiting the reductant fluid quality check. In response to the abort conditions not being met, incrementing the urea quality accumulator according to an amount of urea being injected, and comparing the accumulated urea quantity to a low test threshold. The method includes, in response to the accumulated urea quantity being greater than the low test threshold, comparing the accumulated urea quantity to a high test threshold, and in response to the urea quantity being greater than the high test threshold, determining whether the a NO x exceedance is observed and clearing a urea quality error in response to the NO x exceedance not being observed.

SYSTEMS AND METHODS FOR REDUCING NOISE IN REDUCTANT INSERTION ASSEMBLIES

An aftertreatment system comprises an aftertreatment component structured to decompose constituents of an exhaust gas produced by an engine. A reductant insertion assembly is fluidly coupled to the aftertreatment component and configured to insert a reductant therein. A controller is operatively coupled to the reductant insertion assembly and configured to instruct the reductant insertion assembly to insert the reductant into the aftertreatment component for a first insertion time between first time intervals. The controller determines an operating condition of the engine, and determines if the operating condition satisfies a predetermined condition. In response to the predetermined condition being satisfied, the controller instructs the reductant insertion assembly to insert the reductant into the aftertreatment component for a second insertion time between second time intervals. The second insertion time is longer than the first insertion time. 1. An aftertreatment system , comprising;an aftertreatment component structured to decompose constituents of an exhaust gas produced by an engine;a reductant insertion assembly fluidly coupled to the aftertreatment component and configured to insert a reductant into the aftertreatment component; and instruct the reluctant insertion assembly to insert the reductant into the aftertreatment component for a first insertion time between first time intervals;', 'determine an operating condition of the engine;', 'determine if the operating condition satisfies a predetermined condition; and', 'in response to the predetermined condition being satisfied, instruct the reductant insertion assembly to insert the reductant into the aftertreatment component for a second insertion time between second time intervals, the second insertion time longer than the first insertion time., 'a controller operatively coupled to the reductant insertion assembly, the controller configured to2. The aftertreatment system of claim 1 , wherein the ...

LEAN BURN INTERNAL COMBUSTION ENGINE EXHAUST GAS TEMPERATURE CONTROL

A variety of methods and arrangements for controlling the exhaust gas temperature of a lean burn, skip fire controlled internal combustion engine are described. In one aspect, an engine controller includes an aftertreatment system monitor and a firing timing determination unit. The aftertreatment monitor obtains data relating to a temperature of one or more aftertreatment elements, such as a catalytic converter. Based at least partly on this data, the firing timing determination unit generates a firing sequence for operating the engine in a skip fire manner such that the temperature of the aftertreatment element is controlled within its effective operating range. 1. A method of reducing accumulated soot in a particulate filter utilized in an exhaust path of a lean burn internal combustion engine having a plurality of working chambers , each working chamber being configured to operate in a series of successive working cycles , the method comprising:during operation of the lean burn internal combustion engine, transitioning to a particulate filter cleaning mode, in which the lean burn internal combustion engine is operated in a skip fire mode to increase the temperature of exhaust gases sufficiently to raise the temperature of the particulate filter sufficiently to oxidize and thereby remove soot accumulated on the particulate filter, wherein during operation in the skip fire mode, combustion is caused to occur in selected fired working cycles and no combustion is caused to occur in selected skipped working cycles;deactivating the corresponding working chambers during at least some of the skipped working cycles to prevent air from passing through such working chambers during such skipped working cycles; andwherein during operation in the skip fire mode at a first effective displacement, at least one of the working chambers is sometimes skipped and sometimes fired.2. A method as recited in wherein the particulate filter is heated to a temperature in the range of ...

Valve system

A valve comprising a base plate defining an inlet and outlet passageway. A cover plate is disposed on the base plate and defines a first and second channel. A pressure plate is disposed on the base plate and includes a first anchoring portion, a first sealing portion, and a first biasing portion connecting the first anchoring portion and the first sealing portion. Furthermore, a suction plate is disposed on the base plate and includes a second anchoring portion, a second sealing portion, and a second biasing portion connecting the second anchoring portion to the second sealing portion. The valve is movable between a first configuration, where the first sealing portion is distal to first channel and the second sealing portion is proximal to inlet passageway, and a second configuration, in which the first sealing portion is proximal to first channel, and second sealing portion is distal to inlet passageway.

DOSING AND MIXING ARRANGEMENT FOR USE IN EXHAUST AFTERTREATMENT

A method for causing exhaust gas flow to flow at least 270 degrees in a first direction about a perforated tube using a baffle plate having a main body with a plurality of flow-through openings and a plurality of louvers positioned adjacent to the flow-through openings. The method includes deflecting a first portion of the exhaust gas flow with the main body of the baffle plate. The method also includes allowing a second portion of the exhaust gas flow to flow through the flow-through openings of the baffle plate. The method also deflects the second portion of the exhaust gas flow at a downstream side of the main body with the louvers hereby causing the second portion of the exhaust gas flow to flow in the first direction about the perforated tube. 1. A dosing and mixing arrangement comprising:a main body extending along a length between first and second opposite ends of the main body, the main body defining a longitudinal axis extending between the first and second ends, the main body also defining an interior accessible through an inlet;an outlet pipe extending through the main body at a location adjacent the second end of the main body, the outlet pipe extending in a direction transverse to the longitudinal axis of the main body;a mixing region disposed within the interior of the main body, the mixing region including a perforated conduit that extends transverse to the longitudinal axis of the main body, the mixing region also including a flow path extending around the perforated conduit and leading into the perforated conduit; anda baffle arrangement disposed within the interior of the main body, the baffle arrangement defining a first entrance to the flow path, the baffle arrangement also defining a second entrance to the flow path, the second entrance being spaced along the flow path from the first entrance.2. The dosing and mixing arrangement of claim 1 , wherein the baffle arrangement includes a curved baffle plate having at least a portion extending between ...

NOx ADSORBER CATALYST

A NO x adsorber catalyst and its use in an emission treatment system for internal combustion engines, is disclosed. The NO x adsorber catalyst comprises a first layer consisting essentially of a support material, one or more platinum group metals disposed on the support material, and a NO x storage material.

Exhaust Aftertreatment System Having Mixer Assembly

A mixer assembly for mixing an injected reductant with an exhaust gas output from a combustion engine comprises a mixer housing including a wall defining an exhaust passageway having a longitudinal axis. A tubular swirling device housing extends along a first axis substantially transverse to the longitudinal axis. The tubular swirling device includes a plurality of openings through which exhaust gas enters. The exhaust gas within the tubular swirling device swirls about the first axis and exits at an outlet end of the tubular swirling device. A mixing plate is positioned immediately downstream of the tubular swirling device. The mixing plate swirls the exhaust about a second axis extending parallel to the longitudinal axis. 1. A mixer assembly for mixing an injected reductant with an exhaust gas output from a combustion engine , comprising:a tubular housing including a reductant inlet, an exhaust gas inlet and an exhaust gas outlet, the tubular housing defining a longitudinal axis along which the exhaust enters the housing;a diversion plate positioned within the housing downstream of the exhaust gas inlet and the reductant inlet and being intersected by the longitudinal axis, the diversion plate urging a first portion of the exhaust gas in a first transverse direction and a second portion of the exhaust gas in a second and opposite transverse direction, wherein the first and second portions of the exhaust gas are urged toward the reductant inlet; anda mixing plate positioned within the housing immediately downstream of the diversion plate, the mixing plate including a surface shaped to swirl the exhaust gas and the reductant about an axis extending parallel to the longitudinal axis.2. The mixer assembly of claim 1 , further including a shield fixed to the diversion plate to block the exhaust gas from directly flowing toward the injected reductant.3. The mixer assembly of claim 2 , wherein the shield is fixed to an outer wall of the housing.4. The mixer assembly of ...

Exhaust System Without a DOC Having an ASC Acting as a DOC in a System with an SCR Catalyst Before the ASC

Catalyst articles having a first zone containing a first SCR catalyst and a second zone containing an ammonia slip catalyst (ASC), where the ammonia slip catalyst contains a second SCR catalyst and an oxidation catalyst, and the ASC has DOC functionality, where the first zone is located on the inlet side of the substrate and the second zone is located in the outlet side of the substrate are disclosed. The catalytic articles are useful for selective catalytic reduction (SCR) of NOx in exhaust gases, in reducing the amount of ammonia slip and in oxidizing organic residues. Exhaust systems containing the catalyst articles and methods of using the catalytic articles in an SCR process, where the amount of ammonia slip is reduced and hydrocarbon are oxidized by the ASC catalyst, are also described. 1. An exhaust system comprising:a. a catalyst article comprising a substrate comprising an inlet end and an outlet, a first zone comprising a first SCR catalyst and a second zone comprising an ammonia slip catalyst (ASC), wherein the ammonia slip catalyst comprises a second SCR catalyst and an oxidation catalyst, wherein the first zone is located on the inlet side of the substrate and the second zone is located in the outlet side of the substrate; and{'sub': 3', '3', '3', '3, 'b. a first means for forming NHin the exhaust gas or introducing NHinto an exhaust stream, where the first means for forming NHin the exhaust stream or introducing NHinto the exhaust stream is located before the catalytic article.'}2. The exhaust system of claim 1 , further comprising a CSF or an SCRF claim 1 , where the CSF or SCRF are positioned downstream of the catalyst article and claim 1 , when the system comprises an SCRF claim 1 , a second means for forming NHin the exhaust stream or introducing NHinto the exhaust stream is located between the catalyst article and the SCRF.3. The exhaust system of claim 2 , wherein the CSF comprises a high PGM loading in the front of the CSF.4. The exhaust system ...

DETERMINING FIRING DENSITY OF A SKIP FIRE CONTROLLED LEAN-BURN ENGINE USING AIR-FUEL RATIO AND EXHAUST TEMPERATURES

A skip fire control that relies on a combination of a torque request, exhaust temperature, and air-fuel ratio in determining firing density is described. Also, skipped firing opportunities may either pump or not pump air into an exhaust system, allowing an exhaust gas temperature in the exhaust system to be controlled or modulated. The present invention is also related to Dynamic Skip Fire (DSF), where a decision to either fire or skip cylinders is made every firing opportunity. 1. An internal combustion engine having a plurality of cylinders , each of the cylinders arranged to combust an air-fuel mixture characterized by an air-fuel ratio , comprising;a skip fire controller arranged to operate the internal combustion engine in a skip fire mode by ascertaining a firing density to selectively operate the internal combustion engine at a reduced effective displacement, which is less than full displacement, of the internal combustion engine,the skip fire controller determining the firing density using a combination of:(a) a temperature of exhaust gases exhausted from the internal combustion engine;(b) the air-fuel ratio of the air-fuel mixture contained in one or more of the cylinders; and(c) a torque request,wherein, when operating at the ascertained firing density, at least one cylinder of the internal combustion engine is fired, skipped, and either selectively fired or skipped over successive firing opportunities.2. The internal combustion engine of claim 1 , wherein the engine controller is further configured to dynamically ascertain different firing densities as (a) claim 1 , (b) and/or (c) change in response to changing driving conditions claim 1 , wherein each of the different firing densities are indicative of different reduced effective displacements claim 1 , all of which are less than the full displacement of the internal combustion engine.3. The internal combustion engine of claim 1 , wherein the engine controller is further configured to modulate the ...

CATALYZED SCR FILTER AND EMISSION TREATMENT SYSTEM

Provided is a catalyst article for simultaneously remediating the nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The catalyst article has a soot filter coated with a material effective in the Selective Catalytic Reduction (SCR) of NOx by a reductant, e.g., ammonia. 127-. (canceled)28. A catalyst article comprising a wall flow monolith and a catalytic material contained within the wall flow monolith , wherein the wall flow monolith has a wall porosity of at least 50% and comprises a plurality of longitudinally extending passages formed by longitudinally extending porous walls bounding and defining said passages , wherein the passages comprise inlet passages having an open inlet end and a closed outlet end , and outlet passages having a closed inlet end and an open outlet end , and wherein the catalytic material comprises a zeolite and a base metal selected from copper and iron present in an amount of from about 0.1 to 30 percent by weight of the total weight of base metal plus zeolite , the zeolite having pores connected in three dimensions and a silica to alumina ratio of at least about 10 , the wall flow monolith having integrated NOx and particulate removal efficiency when exposed to diesel engine exhaust and ammonia or an ammonia precursor.29. The catalyst article of claim 28 , wherein the base metal selected from copper and iron is present in an amount of from about 1 to 5 percent by weight of the total weight of base metal plus zeolite.30. The catalyst article of claim 28 , wherein the wall flow monolith has from about 100 to 400 cells per square inch.31. The catalyst article of claim 28 , wherein the wall flow monolith has a wall thickness between 0.002 and 0.015 inches.32. The catalyst article of claim 28 , wherein the catalytic material permeates the porous walls at a concentration of 1.6 to 2.4 g/in claim 28 , and wherein the porous walls have a porosity of from 55 to 75% and an average pore ...

METHOD AND SYSTEM OF UREA SOLUTION LEVEL MEASUREMENT ADJUSTMENT, DISPLAY AND HEATER OPERATION

A method of adjusting and displaying urea solution level measurement value may include measuring urea solution concentration injected into a urea solution tank by a urea solution quality sensor, determining whether unclean urea solution is injected into the urea solution tank by the measured urea solution concentration, adjusting urea solution level value according to the urea solution concentration when the unclean urea solution is injected into the urea solution tank, comparing urea solution level measurement value with reference urea solution level measurement value, and lighting up a warning lamp when the urea solution level measurement value is lower than the reference urea solution level measurement value. 1. A method of adjusting and displaying urea solution level measurement value , comprising:measuring urea solution concentration injected into a urea solution tank by a urea solution quality sensor;determining whether unclean urea solution is injected into the urea solution tank by the measured urea solution concentration;adjusting urea solution level value according to the urea solution concentration when the unclean urea solution is injected into the urea solution tank;comparing urea solution level measurement value with reference urea solution level measurement value; andlighting up a warning lamp when the urea solution level measurement value is lower than the reference urea solution level measurement value.2. A method of operation of a heater , comprising:measuring urea solution concentration injected into a urea solution tank by a urea solution quality sensor;determining whether unclean urea solution is injected into the urea solution tank by the measured urea solution concentration;determining urea solution temperature is lower than heater operation condition temperature according to the unclean urea solution when the unclean urea solution is injected into the urea solution tank; andoperating the heater when the urea solution temperature is lower than ...

Radio Frequency System and Method for Monitoring Engine-Out Exhaust Constituents

A radio frequency system and method for monitoring an engine-out exhaust emission constituent. The system comprises a housing containing the emission constituent, one or more radio frequency sensors extending into the housing and transmitting and receiving radio frequency signals, and a control unit for controlling the radio frequency signals and monitoring changes in the emission constituent based on changes in one or more parameters of the radio frequency signals. In one embodiment, the control unit measures a rate of change in one or more of the parameters of the radio frequency signals for monitoring a rate of change of the emission constituent including for example the emission rate, accumulation rate, and/or depletion rate of the emission constituent. 1. A radio frequency system for monitoring an engine-out exhaust emission constituent comprising:a housing containing the emission constituent;one or more radio frequency sensors extending into the housing and transmitting and receiving radio frequency signals; anda control unit for controlling the radio frequency signals and monitoring changes in the emission constituent based on a measurement of a shift in at least the phase of the radio frequency signals.2. The radio frequency system of claim 1 , wherein the radio frequency signals span a radio frequency signal range and the control unit measures the shift in the phase of the radio frequency signals in predefined regions of the radio frequency signal range.3. The radio frequency system of claim 1 , wherein the control unit measures the shift in the phase of the radio frequency signals in one or more predefined radio frequency signal ranges corresponding to one or more predefined spatial regions in the housing.4. The radio frequency system of claim 1 , wherein the control unit also measures changes in the magnitude or amplitude of the radio frequency signal.5. The radio frequency system of claim 4 , wherein one or more emission constituents are monitored by ...

Exhaust Fluid Filter Including Hydrocarbon Detection Witness Media

An aftertreatment system includes an exhaust reductant tank configured to store an exhaust reductant. A filter is fluidically coupled to the exhaust reductant tank. The aftertreatment system includes a hydrocarbon detection device configured to indicate the presence of a hydrocarbon in the exhaust reductant. A catalyst is included in the system and configured to treat the exhaust reductant flowing through the system. The hydrocarbon detection device can include a hydrophobic paper, and can be disposed in the filter. 125-. (canceled)26. A method for detecting hydrocarbons in an aftertreatment system having a reductant tank and a hydrocarbon detection device coupled to the reductant tank , the method comprising:exposing the hydrocarbon detection device to reductant in the reductant tank; anddetermining that the hydrocarbon detection device has provided an indication of presence of a hydrocarbon in the reductant in the reductant tank.27. The method of claim 26 , further comprising changing the hydrocarbon detection device in response to determining that the hydrocarbon detection device has provided the indication.28. The method of claim 26 , further comprising removing at least some of the reductant from the reductant tank in response to determining that the hydrocarbon detection device has provided the indication.29. The method of claim 26 , wherein the hydrocarbon detection device is configured to provide the indication in response to absorbing a hydrocarbon.30. The method of claim 26 , wherein the indication is a change in color.31. The method of claim 26 , wherein exposing the hydrocarbon detection device to reductant in the reductant tank comprises exposing a hydrophobic paper within the hydrocarbon detection device to the reductant.32. The method of claim 26 , wherein the hydrocarbon detection device is configured to provide the indication in response to the reductant having a concentration of the hydrocarbon of between 0.025% by weight and 1% by weight claim 26 ...

Dosing and mixing arrangement for use in exhaust aftertreatment

A dosing and mixing arrangement includes a mixing tube having a constant diameter along its length. At least a first portion of the mixing tube includes a plurality of apertures. The arrangement also includes a swirl structure for causing exhaust flow to swirl outside of the first portion of the mixing tube in one direction along a flow path that extends at least 270 degrees around a central axis of the mixing tube. The arrangement is configured such that the exhaust enters an interior of the mixing tube through the apertures as the exhaust swirls along the flow path. The exhaust entering the interior of the mixing tube through the apertures has a tangential component that causes the exhaust to swirl around the central axis within the interior of the mixing tube. The arrangement also includes a doser for dispensing a reactant into the interior of the mixing tube.

Exhaust After-Treatment Mounting Arrangement

An exhaust after-treatment mounting arrangement is provided that is mounted outside of an engine compartment and has a perforated enclosure allowing air to permeate the enclosure and establish an airflow through the enclosure to maintain part integrity of components of an exhaust after-treatment system with maximum temperature thresholds. Components of the exhaust after-treatment system may be mounted to permit movement of such components relative to upstream and downstream components in the exhaust system. The enclosure is configured to prevent contact of the hot components by operators and/or flammable materials with small venting holes through top surfaces of the enclosure and large vent holes in bottom areas of the box that allow large volumes of air to easily flow into the enclosure. 1. An exhaust after-treatment mounting arrangement for an off-road agricultural vehicle having a chassis supporting a cab and an engine compartment that houses an engine with an engine exhaust manifold and an engine exhaust pipe extending from the engine exhaust manifold away from the engine and out of the engine compartment , an exhaust stack that releases exhaust gasses from the engine , the exhaust after-treatment mounting arrangement comprising:an exhaust after-treatment system for treating the exhaust of the engine as treated exhaust gasses and directing the treated exhaust gasses to the exhaust stack, wherein the exhaust after-treatment system includes an inlet portion and an outlet portion; a venting system for receiving ambient air into the after-treatment housing box and establishing an airflow through the after-treatment housing box for cooling the exhaust after-treatment system;', 'a flexible mounting system for allowing relative movement of the exhaust after-treatment system and the after-treatment housing box relative to the cab and the engine compartment, wherein the flexible mounting system includes;', 'a first flexible bellows arranged between the engine exhaust ...

MULTI-LEG EXHAUST AFTERTREATMENT SYSTEM AND METHOD

An exhaust aftertreatment system for treating exhaust flow from an internal combustion engine, and associated method, allows for independent control of exhaust flow through plural exhaust legs of the exhaust aftertreatment system. The independent control of exhaust flow is carried out by adjusting a valve positioned in each the exhaust legs based on a value of a signal generated by a flow measurement device positioned along at least one of the exhaust legs. The valves can be adjusted to force a target flow in a exhaust leg, relative flow among exhaust legs, exhaust temperature in an exhaust leg, exhaust backpressure and/or imbalance within the exhaust legs. 113.-. (canceled)14. A method of exhaust aftertreatment for a multi-leg exhaust aftertreatment system , the multi-leg exhaust aftertreatment system including plural parallel exhaust legs adapted to receive exhaust from an internal combustion engine , each of the plural parallel exhaust legs including a diesel oxidation catalyst , a diesel particulate filter , and an independently controllable exhaust valve , the method comprising:flowing exhaust gas through the plural parallel exhaust legs;detecting an exhaust mass flow or exhaust volume flow characteristic in at least one of the plural parallel exhaust legs;determining amounts of exhaust mass flow or exhaust volume flow in the plural parallel exhaust legs based on the detected exhaust mass flow or exhaust volume flow characteristic; andindividually adjusting the exhaust valves in each of the plural parallel exhaust legs based on the determined amounts of the exhaust mass flow or exhaust volume flow.15. The method of claim 14 , wherein the determined amounts are relative amounts among the plural parallel exhaust legs.16. The method of claim 14 , further comprising:monitoring soot loading in each of the plural parallel exhaust legs; andif the monitored soot loading of one of the plural parallel exhaust legs reaches a predetermined regeneration threshold, ...

METHOD AND DEVICE FOR THE PURIFICATION OF DIESEL EXHAUST GASES

The invention proposes a method for the purification of exhaust gases which are generated by a diesel engine with a charging turbine, and a special device for carrying out said method. The device comprises, in the flow direction of the exhaust gas, a dosing device for a reducing agent from a reducing agent reservoir (), an SCR catalytic converter (), an oxidation catalytic converter () and a diesel particle filter (). The system is particularly suitable for the purification of the exhaust gases of diesel vehicles in which engines with a turbocharger (charging turbine ()) and an exhaust-gas recirculation device are used, which engines generate exhaust gases which, in addition to carbon monoxide, hydrocarbons and particles, have nitrogen oxides with an NO/NOratio of between 0.3 and 0.7. 1. A method for the purification of exhaust gases which are generated by a diesel engine with a charging turbine and which , in addition to carbon monoxide , hydrocarbons and particles , contain nitrogen oxides with an NO/NOratio of between 0.3 and 0.7 , with the exhaust gas being conducted via an SCR catalytic converter for the reduction of the nitrogen oxides to form nitrogen , via an oxidation catalytic converter for the oxidation of carbon monoxide and hydrocarbons to form CO , and through a diesel particle filter for the removal of particles ,whereinurea solution, or the solution of some other water-soluble compound which releases ammonia, is used as a reducing agent for the SCR reaction, which reducing agent is dosed into the exhaust section upstream of the charging turbine.2. The method as claimed in claim 1 ,whereinthe charging turbine is used as a mixing element for homogenizing reducing agent and exhaust gas.3. The method as claimed in claim 1 ,whereinthe diesel particle filter is actively regenerated in the event of a critical exhaust-gas counterpressure value being exceeded, with the temperatures required for burning off the soot which has been deposited on the filter being ...

CATALYSED SUBSTRATE MONOLITH

A catalysed substrate monolith for use in treating exhaust gas emitted from a lean-burn internal combustion engine, which catalysed substrate monolith comprising a first washcoat coating and a second washcoat coating wherein the first washcoat coating comprises a catalyst composition comprising at least one platinum group metal (PGM) and at least one support material for the at least one PGM, wherein at least one PGM in the first washcoat coating is liable to volatilise when the first washcoat coating is exposed to relatively extreme conditions including relatively high temperatures, wherein the second washcoat coating comprises at least one metal oxide for trapping volatilised PGM and wherein the second washcoat coating is oriented to contact exhaust gas that has contacted the first washcoat coating. 120.-. (canceled)21. A catalysed substrate monolith for use in treating exhaust gas emitted from a lean-burn internal combustion engine , which catalysed substrate monolith comprising a first washcoat coating and a second washcoat coating , wherein the first washcoat coating comprises a catalyst composition comprising at least one platinum group metal (PGM) and at least one support material for the at least one PGM , wherein at least one PGM in the first washcoat coating is liable to volatilise when the first washcoat coating is exposed to relatively extreme conditions including relatively high temperatures , wherein the second washcoat coating comprises a catalyst composition comprising at least one metal selected from the group consisting of palladium , silver , gold and combinations of any two or more thereof , and at least one metal oxide for trapping volatilised PGM , wherein the at least one metal oxide supports the at least one metal , and wherein the second washcoat coating is oriented to contact exhaust gas that has contacted the first washcoat coating , and wherein the substrate monolith is a flow-through substrate monolith.22. The catalysed substrate ...

Manganese-Containing Diesel Oxidation Catalyst

An oxidation catalyst composite, methods, and systems for the treatment of exhaust gas emissions from a diesel engine are described. More particularly, an oxidation catalyst composite including a first washcoat layer comprising a Pt component and a Pd component, and a second washcoat layer including a refractory metal oxide support containing manganese, a zeolite, and a platinum component is described.

PLANETARY GEAR SYSTEM ARRANGEMENT WITH AUXILIARY OIL SYSTEM

A method of designing a gas turbine engine includes configuring a speed reduction device for driving a fan and configuring a lubrication system for lubricating components across a rotation gap. The lubrication system includes a lubricant input. A stationary first bearing receives lubricant from the lubricant input and has a first race in which lubricant flows. A second bearing for rotation is within the first bearing. The second bearing has a first opening in registration with the first race such that lubricant may flow from the first race through the first opening into a first conduit. The first bearing is configured to also include a second race into which lubricant flows. The second bearing has a second opening in registration with the second race such that lubricant may flow from the second race through the second opening into a second conduit. The first and second conduits deliver lubricant to distinct locations. 1. A method of designing a gas turbine engine comprising:configuring a speed reduction device for driving a fan;configuring a lubrication system for lubricating components across a rotation gap, the lubrication system including a lubricant input, a stationary first bearing receiving lubricant from said lubricant input and having a first race in which lubricant flows, and a second bearing for rotation within said first bearing, said second bearing having a first opening in registration with said first race such that lubricant may flow from said first race through said first opening into a first conduit; andconfiguring said first bearing to also include a second race into which lubricant flows, and said second bearing having a second opening in registration with said second race such that lubricant may flow from said second race through said second opening into a second conduit, with said first and second conduits delivering lubricant to distinct locations.2. The method of claim 1 , wherein said first bearing and said second bearing are centered about a ...

INCREASE AFTERTREATMENT TEMPERATURE DURING LIGHT LOAD OPERATION

Systems, methods, and apparatuses are provided for increasing exhaust gas temperature. A system includes a valve and a controller coupled to the valve. The controller is structured to determine that an exhaust manifold pressure does not meet an exhaust manifold pressure setpoint and in response, cause an adjustment of an effective flow area of exhaust gas from an engine. The adjustment of the effective flow area is structured to increase an exhaust gas temperature. 1. A method , comprising:determining that an exhaust manifold pressure does not meet an exhaust manifold pressure setpoint; andin response, causing an adjustment of an effective flow area for exhaust gas from an engine, the adjustment of the effective flow area structured to increase an exhaust gas temperature.2. The method of claim 1 , further comprising reducing the effective flow area in response to the exhaust manifold pressure being at or below the exhaust manifold pressure setpoint.3. The method of claim 1 , further comprising increasing the effective flow area for the exhaust gas in response to the exhaust manifold pressure being above the exhaust manifold pressure setpoint.4. The method of claim 1 , wherein causing the adjustment of the effective flow area comprises adjusting a position of at least one of a wastegate valve or an exhaust throttle valve.5. The method of claim 1 , further comprising:determining that a temperature of a catalyst in an exhaust aftertreatment system coupled to the engine is below a temperature setpoint; andin combination with the exhaust manifold pressure not meeting the exhaust manifold pressure setpoint, causing the adjustment of the effective flow area for exhaust gas from the engine.6. The method of claim 5 , wherein the catalyst is part of a selective catalyst reduction (SCR) system.7. An apparatus claim 5 , comprising: determine that an exhaust manifold pressure does not meet an exhaust manifold pressure setpoint; and', 'in response, cause an adjustment of an ...

EMISSION TREATMENT CATALYSTS, SYSTEMS AND METHODS

Zoned diesel oxidation catalysts containing a higher precious metal loading in the inlet zone that the outlet zone and an equal or shorter length inlet zone are described. Emission treatment systems and methods of remediating nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons using zoned diesel oxidation catalysts are also described. 1. A diesel oxidation catalyst comprising an inlet zonewith an axial length and an outlet zone with an axial length, the inlet zone comprising at least one of platinum and palladium in a first loading, the outlet zone comprising palladium in a second loading, the outlet zone comprises substantially no platinum, the first loading being greater than the second loading and the axial length of the inlet zone being less than or equal to the axial length of the outlet zone.2. The diesel oxidation catalyst of claim 1 , wherein upon passing an exhaust stream through the catalyst claim 1 , substantially no additional NOis produced over about 90% of the operating window of the catalyst.3. The diesel oxidation catalyst of claim 1 , wherein the axial length of the inlet zone is about half the axial length of the outlet zone.4. The diesel oxidation catalyst of claim 1 , wherein the axial length of the inlet zone is about equal to the axial length of the outlet zone.5. The diesel oxidation catalyst of claim 1 , wherein the axial length of inlet zone is at least about 10% of the total length of the catalyst.6. The diesel oxidation catalyst of claim 1 , wherein the axial length of the inlet zone is at least about 20% of the total length of the catalyst.7. The diesel oxidation catalyst of claim 1 , wherein the total length of the inlet zone is at least about 40% of the total length of the catalyst.8. The diesel oxidation catalyst of claim 1 , wherein the inlet zone has a platinum to palladium ratio equal to or greater than about 10:1.9. The diesel oxidation catalyst of claim 1 , wherein the first loading is greater than about 30 g/ft.10 ...

COPPER CHA ZEOLITE CATALYSTS

Zeolite catalysts and systems and methods for preparing and using zeolite catalysts having the CHA crystal structure are disclosed. The catalysts can be used to remove nitrogen oxides from a gaseous medium across a broad temperature range and exhibit hydrothermal stable at high reaction temperatures. The zeolite catalysts include a zeolite carrier having a silica to alumina ratio from about 15:1 to about 256:1 and a copper to alumina ratio from about 0.25:1 to about 1:1. 1. A catalyst article comprising a honeycomb wall-flow filter substrate having an SCR catalyst composition coated on the wall flow filter comprising a CuCHA zeolite catalyst having a mole ratio of silica to alumina greater than about 15 and an atomic ratio of copper to aluminum exceeding about 0.25 , the SCR catalyst favoring reduction of nitrogen oxides and an ammonia oxidation catalyst coated on the wall flow filter , the ammonia oxidation catalyst favoring the oxidation of ammonia and comprising a CuCHA zeolite catalyst having a mole ratio of silica to alumina greater than about 15 and an atomic ratio of copper to aluminum exceeding about 0.25.2. The catalyst article of claim 1 , wherein the ammonia oxidation catalyst comprises a platinum group metal component.3. The catalyst article of claim 2 , wherein the platinum group metal component comprises Pt.4. The catalyst article of claim 3 , wherein the platinum content is between 0.02% and 1.0% by weight of the catalyst claim 3 , and the platinum loading is from about 0.5 to about 5 g/in.5. The catalyst article of claim 3 , wherein at least a portion of the wall-flow filter substrate is coated with Pt and CuCHA adapted to oxidize ammonia in the exhaust gas stream.6. The catalyst article of claim 1 , wherein the ammonia oxidation catalyst comprises SSZ-13 with at least a portion of a platinum group metal component on the washcoat.7. The catalyst article of claim 1 , wherein the wherein the wall flow filter substrate comprises a ceramic.8. The ...

Self-Propelled Construction Machine

A self-propelled construction machine, comprises a machine frame, on which a working unit is arranged, and comprises a drive unit for driving the working unit. An additive, in particular a urea solution for operating an exhaust gas treatment system, is provided in an operating material tank which is integrated in the fuel tank or water tank of the construction machine. The integration of the operating material tank in the fuel tank or water tank does not necessitate any modifications to the machine frame. The dimensions of the construction machine can also remain unchanged, since the fuel tank does not take up any extra space on the machine frame if the dimensions of the fuel tank or water tank are maintained. 1. A self-propelled construction machine , comprising:a machine frame;a working unit arranged on the machine frame and configured to carry out work for a building operation;a drive unit arranged on the machine frame and configured to drive the working unit, the drive unit including at least one internal combustion engine;a first tank formed as an integral component of the machine frame, the first tank being either a fuel tank configured to hold fuel for the at least one internal combustion engine or a water tank; andan operating material tank configured as an exchangeable unit removable from the first tank so that the first tank has a first capacity when the operating material tank is removed from the first tank, and a second capacity smaller than the first capacity when the operating material tank is received in the first tank, the operating material tank being configured to hold operating material.2. The construction machine of claim 1 , wherein:the drive unit includes an exhaust gas treatment system; andthe operating material tank is configured to hold a urea solution additive for the exhaust gas treatment system, the urea solution additive being the operating material.3. (canceled)4. The construction machine of claim 1 , wherein:the first tank includes an ...

EXHAUST FLUID FILTER INCLUDING HYDROCARBON DETECTION WITNESS MEDIA

An aftertreatment system includes an exhaust reductant tank configured to store an exhaust reductant. A filter is fluidically coupled to the exhaust reductant tank. The aftertreatment system includes a hydrocarbon detection device configured to indicate the presence of a hydrocarbon in the exhaust reductant. A catalyst is included in the system and configured to treat the exhaust reductant flowing through the system. The hydrocarbon detection device can include a hydrophobic paper, and can be disposed in the filter. 1. An aftertreatment system , comprising:an exhaust reductant tank configured to store an exhaust reductant;a filter;a hydrocarbon detection device configured to indicate the presence of a hydrocarbon in the exhaust reductant; anda selective catalytic reduction system configured to treat an exhaust gas flowing through the selective catalytic reduction system.225-. (canceled) The present disclosure relates generally to exhaust aftertreatment systems for use with internal combustion (IC) engines.During the combustion process in an IC engine (e.g., a diesel-powered engine), sulfur is concurrently formed with carbon monoxide (CO) and hydrocarbons (HC) as various sulfur oxides (SO). Typically, 97-99% of the total amount of SOpresent in exhaust gas includes sulfur dioxide (SO) and 1-3% includes sulfur trioxide (SO). Thus, fuels with higher sulfur content tend to produce higher amounts of SO. For example, fuel with sulfur content of 1000 ppm may form approximately 1-3 ppm SO.Exhaust aftertreatment systems are used to receive and treat exhaust gas generated by IC engines. Conventional exhaust gas aftertreatment systems include any of several different components to reduce the levels of harmful exhaust emissions present in exhaust gas. For example, certain exhaust aftertreatment systems for diesel-powered IC engines include a selective catalytic reduction (SCR) catalyst to convert NO(NO and NOin some fraction) into harmless nitrogen gas (N) and water vapor (HO) ...

COMPACT SIDE INLET AND OUTLET EXHAUST AFTERTREATMENT SYSTEM

An exhaust aftertreatment assembly and method of manufacturing and operating an exhaust aftertreatment assembly. An exhaust aftertreatment assembly includes an aftertreatment housing and an inlet conduit coupled to the aftertreatment housing at an inlet port so as to transfer exhaust gas into the aftertreatment housing. An inlet chamber is positioned in the aftertreatment housing. The inlet chamber is fluidly coupled to the inlet port of the aftertreatment housing to receive the exhaust gas from the inlet conduit. 128.-. (canceled)29. A method of servicing an aftertreatment system mounted on a vehicle , the aftertreatment system comprising an aftertreatment housing having a longitudinal flow axis , an inlet port and an inlet chamber positioned orthogonally to the longitudinal flow axis , and an outlet port and an outlet chamber also positioned orthogonally to the longitudinal flow axis , the method comprising:shutting off the vehicle;removing at least one used aftertreatment component from an internal volume defined by the aftertreatment housing without removing the aftertreatment system from the vehicle; andpositioning a serviced or new aftertreatment component within the internal volume of the aftertreatment housing.30. The method of claim 29 , wherein the used aftertreatment component includes a particulate filter.31. The method of claim 30 , wherein the particulate filter is positioned within a first portion of the internal volume defined by the aftertreatment housing claim 30 , wherein the at least one aftertreatment component also includes a selective catalytic reduction component positioned within a second portion of the internal volume of the aftertreatment housing claim 30 , the second portion downstream of the first portion claim 30 , and wherein the method further comprises:removing the selective catalytic reduction component from the second portion of the internal volume of the aftertreatment housing without removing the aftertreatment system from the ...

Systems and methods for purging an exhaust reductant delivery system

A hydraulic system comprises a fluid tank and a pump, including a pump reservoir, fluidly coupled to the tank via a supply line. A valve is in fluidic communication with the pump reservoir via a pressure line. A backflow line fluidly couples the pump reservoir to the fluid tank via a timer reservoir and an orifice included in the timer reservoir. The hydraulic system transitions between a normal state and a purge state. In the normal state in which the pump is on, a first portion of the fluid is communicated from the pump reservoir to the valve and a second portion of the fluid is communicated from the pump reservoir to the tank. In the purge state, the pressure line and valve are purged followed by the backflow line and the pump reservoir such that no fluid remains in the pump reservoir.

CATALYST BLENDS

Provided is a catalyst for the selective reduction of NOx comprising a two molecular sieve materials having a CHA structure, wherein the first molecular sieve has a mean crystal size of about 0.01 to 1 μm and the second molecular sieve has a mean crystal size of about 1-5 μm, and wherein the first molecular sieve contains a first extra-framework metal, the second molecular sieve contains a second extra-framework metal, and wherein said first and second extra-framework metals are independently selected from the group consisting of cesium, copper, nickel, zinc, iron, tin, tungsten, molybdenum, cobalt, bismuth, titanium, zirconium, antimony, manganese, chromium, vanadium, niobium, and combinations thereof. 1. A catalyst composition comprising a blend of two molecular sieve materials each having a CHA structure , wherein the first molecular sieve has a first silica-to-alumina ratio (SAR) of about 10-25 and contains a first extra-framework metal , the second molecular sieve has second SAR of about 20-35 and contains a second extra-framework metal , and wherein said first and second SAR are different and said first and second extra-framework metals are independently selected from the group consisting of cesium , copper , nickel , zinc , iron , tin , tungsten , molybdenum , cobalt , bismuth , titanium , zirconium , antimony , manganese , chromium , vanadium , niobium , and combinations thereof ,and wherein at least one of the first and second extra-framework metals comprises manganese.2. The catalyst of claim 1 , wherein the two molecular sieve materials are aluminosilicates.3. The catalyst of claim 1 , wherein said first and second extra-framework metals are independently selected from the group consisting of copper claim 1 , iron claim 1 , and manganese claim 1 , and wherein at least one of the first and second extra-framework metals comprises manganese.4. The catalyst of claim 1 , wherein at least one of the first molecular sieve and the second molecular sieve is an ...

Exhaust Aftertreatment System Having Mixer Assembly

A mixer assembly for mixing an injected reductant with an exhaust gas output from a combustion engine comprises a mixer housing including a wall defining an exhaust passageway having a longitudinal axis. A tubular swirling device housing extends along a first axis substantially transverse to the longitudinal axis. The tubular swirling device includes a plurality of openings through which exhaust gas enters. The exhaust gas within the tubular swirling device swirls about the first axis and exits at an outlet end of the tubular swirling device. A mixing plate is positioned immediately downstream of the tubular swirling device. The mixing plate swirls the exhaust about a second axis extending parallel to the longitudinal axis. 1. A mixer assembly for mixing an injected reductant with an exhaust gas output from a combustion engine , comprising:a mixer housing including a wall defining an exhaust passageway having a longitudinal axis along which the exhaust gas enters the mixer housing;a tubular swirling device extending along a first axis extending substantially transverse to the longitudinal axis, the tubular swirling device including a plurality of openings through which exhaust gas enters, the exhaust gas within the tubular swirling device swirling about the first axis and exiting at an outlet end of the tubular swirling device; anda mixing plate positioned immediately downstream of the tubular swirling device, the mixing plate swirling the exhaust about a second axis extending parallel to the longitudinal axis.2. The mixer assembly of claim 1 , wherein the plurality of openings are defined by a plurality of louvers.3. The mixer assembly of claim 1 , further comprising an injector injecting reagent into a mixing chamber defined by the tubular swirling device and the mixer housing claim 1 , wherein the exhaust gas and the reagent mix with each other in the mixing chamber.4. The mixer assembly of claim 3 , further comprising an exhaust aftertreatment component disposed ...

OXIDATION CATALYST FOR A DIESEL ENGINE EXHAUST

An oxidation catalyst is described for treating an exhaust gas produced by a diesel engine comprising a catalytic region and a substrate, wherein the catalytic region comprises a catalytic material comprising: bismuth (Bi), antimony (Sb) or an oxide thereof; a platinum group metal (PGM) selected from the group consisting of (i) platinum (Pt), (ii) palladium (Pd) and (iii) platinum (Pt) and palladium (Pd); and a support material, which is a refractory oxide; wherein the platinum group metal (PGM) is supported on the support material; and wherein the bismuth (Bi), antimony (Sb) or an oxide thereof is supported on the support material and/or the refractory oxide comprises the bismuth, antimony or an oxide thereof. 1. An oxidation catalyst for treating an exhaust gas produced by a diesel engine comprising a catalytic region and a substrate , wherein the catalytic region comprises a catalytic material comprising:bismuth (Bi), antimony (Sb) or an oxide thereof;a platinum group metal (PGM) selected from the group consisting of (i) platinum (Pt), (ii) palladium (Pd) and (iii) platinum (Pt) and palladium (Pd); anda support material, which is a refractory oxide;wherein the platinum group metal (PGM) is supported on the support material; andwherein the bismuth (Bi), antimony (Sb) or an oxide thereof is supported on the support material.2. An oxidation catalyst according to claim 1 , wherein the refractory oxide is a particulate refractory oxide claim 1 , and the bismuth claim 1 , antimony or an oxide thereof is dispersed over a surface of the particulate refractory oxide.3. An oxidation catalyst according to claim 1 , wherein the catalytic material comprises bismuth (Bi) or an oxide thereof.4. An oxidation catalyst according to claim 3 , wherein the refractory oxide is a particulate refractory oxide having a bulk particulate structure claim 3 , and the bismuth or an oxide thereof is contained within the bulk particulate structure of the refractory oxide.5. An oxidation ...

NH3 OVERDOSING-TOLERANT SCR CATALYST

Catalysts having a blend of platinum on a support with low ammonia storage with a Cu-SCR catalyst or an Fe-SCR catalyst are disclosed. The catalysts can also contain one or two additional SCR catalysts. The catalysts can be present in one of various configurations. Catalytic articles containing these catalysts are disclosed. The catalytic articles are useful for selective catalytic reduction (SCR) of NOx in exhaust gases and in reducing the amount of ammonia slip. Methods for producing such articles are described. Methods of using the catalytic articles in an SCR process, where the amount of ammonia slip is reduced, are also described. 1. A catalytic article comprising a substrate having an inlet and outlet and coated with a first coating comprising a blend of (a) platinum on a molecular sieve support with low ammonia storage with (b) a first SCR catalyst; a second coating comprising a second SCR catalyst; wherein the second coating at least partially overlaps the first coating , where the ratio of the amount of the first SCR catalyst to the amount of platinum on the support with low ammonia storage is in the range of 10:1 to 50:1 , inclusive , based on the weight of these components.2. The catalytic article of claim 1 , wherein the first SCR catalyst is a Cu-SCR catalyst or a Fe-SCR catalyst.3. The catalytic article of claim 1 , where the second coating completely overlaps the first coating.4. The catalyst article of claim 1 , wherein the second coating overlaps at least 20% of the length of the first coating along an axis from the inlet to the outlet.5. The catalytic article of claim 1 , where the support comprises a silica or a zeolite with silica-to-alumina ratio of at least one of: (a) ≥100 claim 1 , (b) ≥200 claim 1 , (c) ≥250 claim 1 , ≥300 claim 1 , (d) ≥400 claim 1 , (e) ≥500 claim 1 , (f) ≥750 and (g) ≥1000.6. The catalyst of claim 1 , where the blend further comprises at least one of palladium (Pd) claim 1 , gold (Au) claim 1 , silver (Ag) claim 1 , ...

ZEOLITE PROMOTED V/TiW CATALYSTS

Provided is a catalyst composition for treating exhaust gas comprising a blend of a first component and second component, wherein the first component is an aluminosilicate or ferrosilicate molecular sieve component wherein the molecular sieve is either in H+ form or is ion exchanged with one or more transition metals, and the second component is a vanadium oxide supported on a metal oxide support selected from alumina, titania, zirconia, ceria, silica, and combinations thereof. Also provided are methods, systems, and catalytic articles incorporating or utilizing such catalyst blends. 1. A catalyst composition for treating exhaust gas comprising a blend of a first component and second component , wherein the first component is an aluminosilicate or ferrosilicate molecular sieve component wherein the molecular sieve is in H+ form , and the second component is a vanadium oxide supported on a metal oxide support selected from alumina , titania , zirconia , ceria , silica , and combinations thereof.2. The catalyst of claim 1 , wherein the molecular sieve has a framework selected from MFI claim 1 , BEA claim 1 , and FER.3. The catalyst of claim 2 , wherein the molecular sieve is H+/MFI aluminosilicate.4. The catalyst of claim 1 , wherein the molecular sieve is a BEA ferrosilicate.5. The catalyst of claim 1 , wherein the metal oxide support is titanium oxide.6. The catalyst composition of claim 1 , wherein the second component further comprises tungsten oxide.7. The catalyst composition of claim 1 , wherein the second component further comprises iron vanadate.8. The catalyst composition of claim 1 , wherein the first component and second component are present in the blend in a respective weight ratio of about 5:95 to about 40:60.9. The catalyst composition of claim 1 , wherein the blend comprises about 0.5 to about 5 weight percent the vanadium oxide based on the weight of the first and second components.10. A catalytic washcoat comprising a catalyst according to claim 1 , ...

ASYNCHRONOUS REDUCTANT INSERTION IN AFTERTREATMENT SYSTEMS

A system for asynchronously delivering reductant from a reductant storage tank to a first selective catalytic reduction system and a second selective catalytic reduction system included in an aftertreatment system includes: a reductant insertion assembly fluidly coupled to the reductant storage tank, the reductant insertion assembly configured to be fluidly coupled to each of the first selective catalytic reduction system and the second selective catalytic reduction system, the reductant insertion assembly including a first injector fluidly coupled to the first selective catalytic reduction system, and a second injector fluidly coupled to the second selective catalytic reduction system; and a controller communicatively coupled to the reductant insertion assembly. 1. A system for asynchronously delivering reductant from a reductant storage tank to a first selective catalytic reduction system and a second selective catalytic reduction system included in an aftertreatment system , comprising:a reductant insertion assembly fluidly coupled to the reductant storage tank, the reductant insertion assembly configured to be fluidly coupled to each of the first selective catalytic reduction system and the second selective catalytic reduction system, the reductant insertion assembly including a first injector fluidly coupled to the first selective catalytic reduction system, and a second injector fluidly coupled to the second selective catalytic reduction system; and a first activation time at which the first injector is to be activated,', 'a first delivery time for which the first injector is to be selectively activated for delivering a first amount of reductant into the first selective catalytic reduction system,', 'a second activation time at which the second injector is to be activated, and', 'a second delivery time for which the second injector is to be selectively activated for delivering a second amount of reductant into the second selective catalytic reduction system;, ...

INTEGRATED LNT-TWC CATALYST

A layered catalyst composite for the treatment of exhaust gas emissions, effective to provide lean NOtrap functionality and three-way conversion functionality is described. Layered catalyst composites can comprise catalytic material on a substrate, the catalytic material comprising at least two layers. The first layer comprising rare earth oxide-high surface area refractory metal oxide particles, an alkaline earth metal supported on the rare earth oxide-high surface area refractory metal oxide particles, and at least one first platinum group metal component supported on the rare earth oxide-high surface area refractory metal oxide particles. The second layer comprising a second platinum group metal component supported on a first oxygen storage component (OSC) and/or a first refractory metal oxide support and, optionally, a third platinum group metal supported on a second refractory metal oxide support or a second oxygen storage component. 128.-. (canceled)29. An exhaust gas treatment system comprising a layered catalyst composite located downstream of an engine , wherein the layered catalyst composite comprises a catalytic material on a substrate , the catalytic material comprising at least two layers , wherein:a first layer comprises rare earth oxide-high surface area refractory metal oxide particles, an alkaline earth metal supported on the rare earth oxide-high surface area refractory metal oxide particles, and at least one first platinum group metal component supported on the rare earth oxide-high surface area refractory metal oxide particles; anda second layer comprises a second platinum group metal component supported on a first oxygen storage component (OSC) and/or a first refractory metal oxide support and, optionally, a third platinum group metal component supported on a second refractory metal oxide support or a second oxygen storage component.30. The exhaust gas treatment system of claim 29 , wherein the engine comprises a lean burn engine.31. The exhaust ...

Apparatus for Facilitating Reductant Decomposition and Mixing

According to one embodiment, an apparatus () for mounting to an inner wall () of an exhaust tube () includes a tube engagement surface () and an exhaust engagement surface (A). The tube engagement surface comprises a convex surface of a constant first radius of curvature about a first axis. The exhaust engagement surface is adjacent the tube engagement surface, and includes a concave surface of a second radius of curvature about a second axis generally perpendicular to the first axis. 1. An apparatus for mounting to an inner wall of an exhaust tube , comprising:a tube engagement surface comprising a convex surface of a constant first radius of curvature about a first axis; andan exhaust engagement surface adjacent the tube engagement surface, the exhaust engagement surface comprising a concave surface of a second radius of curvature about a second axis generally perpendicular to the first axis.2. The apparatus of claim 1 , further comprising a rounded tip surface extending linearly from a first end of the tube engagement surface to a second end of the tube engagement surface claim 1 , the exhaust engagement surface extending between the tube engagement surface and the rounded tip surface.3. The apparatus of claim 1 , wherein the apparatus has a substantially T-shaped cross-section.4. The apparatus of claim 1 , wherein the first radius of curvature matches a radius of the exhaust tube.5. The apparatus of claim 4 , wherein an overall height of the apparatus is between about 10% and 50% of the radius of the exhaust tube.6. The apparatus of claim 1 , further comprising a ledge surface between the tube engagement surface and the exhaust engagement surface claim 1 , the ledge surface being substantially planar and extending substantially transversely relative to the tube engagement surface claim 1 , and wherein the ledge surface has a length that is less than an overall length of the apparatus.7. The apparatus of claim 1 , wherein a ratio of the second radius of curvature ...

PRESSURE DIFFERENTIATED EXHAUST AFTERTREATMENT DEVICE

The disclosure relates to an exhaust gas aftertreatment device for purification of exhaust gas emissions. The exhaust gas aftertreatment device is arranged in an exhaust gas passage subsequently of an internal combustion engine and includes an encapsulating portion, a first catalytic substrate and a second catalytic substrate. The second catalytic substrate may be of SCR type. The exhaust gas aftertreatment device includes a reductant injecting device, a pipe and an obstructing portion, where the reductant injecting device is arranged such that reductant is injectable within the pipe and the exhaust gas flow through the pipe can be controlled by the obstructing portion. 1. An exhaust gas aftertreatment device for purification of exhaust gas emissions , the exhaust gas aftertreatment device for arrangement in an exhaust gas passage subsequently of an internal combustion engine , and for enclosure by an encapsulating portion of the exhaust gas passage , the exhaust gas aftertreatment device comprising:a first catalytic substrate and a second catalytic substrate, the first catalytic substrate for arrangement upstream of the second catalytic substrate, the first and second catalytic substrates for arrangement such that a respective catalytic substrate covers a majority of a respective flow cross sectional area of the exhaust gas passage, and the first and second catalytic substrates for arrangement to extend a respective length in a flow direction of the exhaust gas passage;a reductant injecting device; anda pipe for arrangement in the flow direction of the first catalytic substrate such that the pipe provides a passage through the first catalytic substrate, the pipe comprising an obstructing portion for arrangement such that the obstructing portion covers a cross sectional area of the pipe such that a difference in back pressure is obtainable between the pipe and the first catalytic substrate, the pipe further comprising circumferential perforations along at least a ...

METHOD AND SYSTEM FOR MITIGATING UREA DEPOSITS WITHIN AN SCR CATALYST SYSTEM

A method and system for mitigating a urea deposit within an SCR system that includes determining a mass of an accumulated urea deposit present within the SCR catalyst and SCR piping, comparing the mass of the accumulated urea deposit with a deposit upper threshold limit, and initiating an SCR regeneration event when the mass of the accumulated urea deposit is greater than the deposit upper threshold limit. The method further includes determining an amount of NHpassing through the SCR catalyst downstream of the urea deposit, comparing the amount of NHpassing through the SCR catalyst with an NHregeneration threshold limit, and terminating the SCR regeneration event when the level of NHpassing through the SCR catalyst is less than the SCR NHregeneration threshold. 1. A system , comprising:a reductant delivery system configured to inject reductant into an exhaust gas stream upstream of a selective catalytic reduction (SCR) catalyst in exhaust receiving communication with the exhaust gas stream, wherein the exhaust gas stream is produced by an engine system and flows from an engine of the engine system to a tailpipe of the engine system; anda controller having a SCR catalyst regeneration circuit in electrical communication with the reductant delivery system, the SCR catalyst regeneration circuit comprising a urea deposit accumulation circuit structured to determine a mass of an accumulated urea deposit present within the SCR catalyst and SCR piping from at least one input received from the reductant delivery system;wherein the SCR catalyst regeneration circuit is structured to initiate a SCR regeneration event when the determined mass of the accumulated urea deposit is greater than a deposit upper threshold limit; andwherein the SCR catalyst regeneration circuit is structured to maintain the SCR regeneration event for a predetermined time period after initiation of the SCR regeneration event.2. The system of claim 1 , wherein the predetermined time period is based on a ...

CATALYZED SCR FILTER AND EMISSION TREATMENT SYSTEM

Provided is a catalyst article for simultaneously remediating the nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The catalyst article has a soot filter coated with a material effective in the Selective Catalytic Reduction (SCR) of NOx by a reductant, e.g., ammonia. 127-. (canceled)28. A catalyst article comprising a wall flow monolith and a catalytic material contained within the wall flow monolith , wherein the wall flow monolith has a wall porosity of at least 50% and comprises a plurality of longitudinally extending passages formed by longitudinally extending porous walls bounding and defining said passages , wherein the passages comprise inlet passages having an open inlet end and a closed outlet end , and outlet passages having a closed inlet end and an open outlet end , and wherein the catalytic material comprises a zeolite and a base metal selected from copper and iron present in an amount of from about 0.1 to 30 percent by weight of the total weight of base metal plus zeolite , the zeolite having pores connected in three dimensions and a silica to alumina ratio of at least about 10 , the wall flow monolith having integrated NOx and particulate removal efficiency when exposed to diesel engine exhaust and ammonia or an ammonia precursor.29. The catalyst article of claim 28 , wherein the base metal selected from copper and iron is present in an amount of from about 1 to 5 percent by weight of the total weight of base metal plus zeolite.30. The catalyst article of claim 28 , wherein the wall flow monolith has from about 100 to 400 cells per square inch.31. The catalyst article of claim 28 , wherein the wall flow monolith has a wail thickness between 0.002 and 0.015 inches.32. The catalyst article of claim 28 , wherein the catalytic: material permeates the porous walls at a concentration of 1.6 to 2.4 g/in claim 28 , and wherein the porous walls have a porosity of from 55 to 75% and an average pore ...

Method for the Cleaning of Exhaust Gas from a Compression Ignition Engine

A method for the cleaning of exhaust gas from a compression ignition engine, comprising the steps of injecting a first amount of an aqueous urea solution into the gas; in a first mode of operation and at an exhaust gas temperature of between 150 and 220° C. hydrolysing the first amount of urea to ammonia reducing agent in presence of a first catalyst comprising vanadium oxide supported on titania and subsequently removing part of nitrogen oxides contained in the exhaust gas by contacting the gas mixed with the ammonia reducing agent through a second catalyst comprising platinum on titania and/or alumina; and in a second mode of operation and at an exhaust gas temperature above 220° C. removing a part of the nitrogen oxides in presence of the first catalyst and the ammonia reducing agent and subsequently oxidising hydrocarbons, carbon monoxide and remaining amount of the ammonia reducing agent further contained in the exhaust gas by passing the gas through the second catalyst.

ASSEMBLY AND METHODS FOR NOx REDUCING REAGENT DOSING WITH VARIABLE SPRAY ANGLE NOZZLE

In an assembly and methods for NOreductant dosing with variable spray angle nozzle, according to various embodiments, a reductant dosage is calculated. A reductant delivery region in an exhaust stream area of an aftertreatment system and an actuation period may be specified. Based at least on the reductant delivery region and the actuation period, the reductant insertion assembly may be placed in a state for reductant delivery such that one of a first array of reductant insertion ports and a second array of reductant insertion ports is in an open position. The shape of the variable spray angle nozzle may define different levels. Different arrays of reductant delivery ports may have varying operating characteristics, such as diameter, number of ports, actuation time, and/or reagent delivery angle and may be activated based on reductant flow pressure and/or reductant flow velocity. 1. A method for dosing reductant , the method comprising:{'sub': 'x', 'receiving, by an interface circuit of a reductant dosing controller, a NOconversion ratio;'}{'sub': x', 'x, 'based at least on the NOconversion ratio, calculating, by a NOdosing circuit of the reductant dosing controller, a reductant dosage;'}{'sub': 'x', 'specifying, by the NOdosing circuit of the reductant dosing controller, a reductant delivery region in a diesel engine exhaust stream area of an aftertreatment system;'}{'sub': 'x', 'specifying, by the NOdosing circuit of the reductant dosing controller, an actuation period; and'}{'sub': 'x', 'based at least on the reductant delivery region and the actuation period, directing, by the NOdosing circuit of the reductant dosing controller, a reductant dosing system, the reductant dosing system comprising a first array of reductant insertion ports and a second array of reductant insertion ports, to open either the first array of reductant insertion ports or the second array of reductant insertion ports.'}2. The method of claim 1 , further comprising effectuating claim 1 , ...

REDUCTANT INJECTION IN EXHAUST MANIFOLD

An aftertreatment system comprises a first passageway having a first temperature and a second passageway having a second temperature different than the first temperature. A turbine is disposed downstream from the first passageway and upstream from the second passageway. The turbine is in fluidic communication with the first passageway and the second passageway. The turbine is structured to receive an exhaust gas from the first passageway, generate energy using the exhaust gas flowing through the turbine and communicate the exhaust gas to the second passageway. The aftertreatment system also includes an insertion device structured to insert an exhaust reductant into the first passageway. A selective catalytic reduction system is configured to receive the exhaust gas from the second passageway and treat the exhaust gas. The first temperature can be higher than the second temperature. 110-. (canceled)11. An aftertreatment system , comprising:a turbinea selective catalytic reduction system positioned downstream of the turbine; 'a first branch fluidly coupled to the turbine, the first branch structured to communicate a first portion of the exhaust gas into the turbine,', 'an exhaust gas loop structured to receive an exhaut gas, the exhaust loop comprisinga second branch structured to communicate a second portion of the exhaust gas to a part of the exhaust gas loop downstream of the turbine, the second branch bypassing the turbine so that the second portion of the exhaust gas does not flow through the turbine, the first portion of the exhaust gas and the second portion of the exhaust gas combining downstream of the turbine; andan insertion device structured to insert the exhaust reductant into the second branch.12. The aftertreatment system of claim 11 , wherein the first portion of the exhaust gas has a first portion first temperature upstream of the turbine and a first portion second temperature downstream of the turbine claim 11 , the first portion first temperature ...

DOSING AND MIXING ARRANGEMENT FOR USE IN EXHAUST AFTERTREATMENT

A method for causing exhaust gas flow to flow at least 270 degrees in a first direction about a perforated tube using a baffle plate having a main body with a plurality of flow-through openings and a plurality of louvers positioned adjacent to the flow-through openings. The method includes deflecting a first portion of the exhaust gas flow with the main body of the baffle plate. The method also includes allowing a second portion of the exhaust gas flow to flow through the flow-through openings of the baffle plate. The method also deflects the second portion of the exhaust gas flow at a downstream side of the main body with the louvers hereby causing the second portion of the exhaust gas flow to flow in the first direction about the perforated tube. 1. A dosing and mixing arrangement comprising:a main body extending along a length between first and second opposite ends of the main body, the main body defining a longitudinal axis extending between the first and second ends, the main body also defining an interior accessible through an inlet;an outlet pipe extending through the main body at a location adjacent the second end of the main body, the outlet pipe extending in a direction transverse to the longitudinal axis of the main body;a mixing region disposed within the interior of the main body, the mixing region including a perforated conduit that extends transverse to the longitudinal axis of the main body, the perforated conduit defining multiple openings, the mixing region also including a flow path extending around the perforated conduit and leading into the perforated conduit through the multiple openings; anda baffle arrangement disposed within the interior of the main body, the baffle arrangement defining a first entrance to the flow path, the baffle arrangement also defining a second entrance to the flow path, the second entrance being spaced along the flow path from the first entrance.2. The dosing and mixing arrangement of claim 1 , wherein the baffle ...

EXHAUST SYSTEM FOR A COMBUSTION ENGINE

An exhaust system () for a motor vehicle includes an exhaust gas-purifying device () for purifying exhaust gas () removed from an internal combustion engine with a reducing agent feed (), which is arranged downstream and at a spaced location from the exhaust gas-purifying device () and by which a reducing agent can be introduced into the exhaust system (). A reducing agent-deflecting device () is arranged between the exhaust gas-purifying device () and the reducing agent feed (). The reducing agent-deflecting device () has at least one reducing agent-deflecting element () of a blade-like design. 1. An exhaust system for a combustion engine , the exhaust system comprising:an exhaust gas-purifying device having an inlet side arranged to receive exhaust gas from the combustion engine, said exhaust gas-purifying device having an outlet side arranged to discharge the exhaust gas from said exhaust gas-purifying device, said exhaust gas-purifying device having a passage to guide the exhaust gas from said inlet side to said outlet side, a surface of said passage having a material to purify the exhaust gas;an injection area connected to said outlet side of said exhaust gas-purifying device and receiving the exhaust gas from said exhaust gas-purifying device;a reducing agent feed mounted in said injection area and introducing reducing agent into said injection area in a feed direction and with a feed range, said feed direction being opposite to a direction of the exhaust gas through said injection area, said material of said exhaust gas-purifying device being arranged in said feed direction and said feed range;a deflecting device arranged between the exhaust gas-purifying device and said reducing agent feed, said deflecting device being arranged to block the reducing agent from contacting said material of said exhaust gas-purifying device.2. An exhaust system in accordance with claim 1 , wherein:said deflecting device includes a plurality of deflecting elements, each of said ...

Exhaust Aftertreatment System Having Mixer Assembly

A mixer assembly for mixing an injected reductant with an exhaust gas output from a combustion engine comprises a mixer housing including a wall defining an exhaust passageway having a longitudinal axis. A tubular swirling device housing extends along a first axis substantially transverse to the longitudinal axis. The tubular swirling device includes a plurality of openings through which exhaust gas enters. The exhaust gas within the tubular swirling device swirls about the first axis and exits at an outlet end of the tubular swirling device. A mixing plate is positioned immediately downstream of the tubular swirling device and includes apertures through which the exhaust gas exiting the outlet end of the tubular swirling device flows. The mixing plate swirls the exhaust about a second axis extending parallel to the longitudinal axis.

Planetary gear system arrangement with auxiliary oil system

In an embodiment of the present disclosure, a gas turbine engine includes a fan, a first compressor stage and a second compressor stage, a first turbine stage and a second turbine stage, and wherein said first turbine stage drives said second compressor stage as a high spool, and wherein said second turbine stage drives said first compressor stage as part of a low spool, and a gear train driving said fan with said low spool, and such that said fan and said first compressor stage rotate in the same direction, and wherein said high spool operates at higher pressures than said low spool.

UREA MIXER

Methods and systems are provided for a urea mixer. In one example, a urea mixer may include a plurality of outlets located adjacent a throat of a venturi passage. 110-. (canceled)11. A method comprising:injecting a reductant vertically above outlets of a hollow, annular mixer configured with downstream inlets receiving exhaust flow for mixing with the reductant, and where the inlets are located downstream of the outlets along a venturi passage located along a bore of the mixer.12. The method of claim 11 , wherein the injecting the reductant is in response to an oxidation state of a catalyst being less than a threshold oxidation.13. The method of claim 11 , wherein the injecting further comprises an injecting pressure claim 11 , and where the injecting pressure is based on one or more of an engine load and a mass of accumulated reductant on interior surfaces of the mixer.14. The method of claim 11 , wherein injecting the reductant further includes actuating a variable venturi device located upstream a venturi inlet claim 11 , and where actuating the variable venturi is based on one or more of an engine load and vacuum generated at a throat of the venturi.15. The method of claim 11 , further comprising flowing exhaust through the inlets at a plurality of angles including a first angle perpendicular to a direction of exhaust flow in an exhaust passage and a second angle oblique to the direction of exhaust flow in the exhaust passage.1620-. (canceled) The present description relates generally to methods and systems for a urea mixer.One technology for after-treatment of engine exhaust utilizes selective catalytic reduction (SCR) to enable certain chemical reactions to occur between NOx in the exhaust and ammonia (NH3). NH3 is introduced into an engine exhaust system upstream of an SCR catalyst by injecting urea into an exhaust pathway, or is generated in an upstream catalyst. The urea entropically decomposes to NH3 under high temperature conditions. The SCR facilitates ...

System and method for determining reductant delivery performance

A system has a pump and an injector coupled to the pump. The system further comprises a controller coupled to the pump and the injector. The controller is structured to: determine a change of reductant flow relative to a change of pump rate of the pump; and generate a status command indicative of at least one of an under-restricted injector or an over-restricted injector in response to the determination of the change of reductant flow relative to the change of pump rate of the pump.

NITROGEN OXIDE PURIFICATION SYSTEM AND CONTROL METHOD OF THE SAME

A nitrogen oxide purification system includes an exhaust line exhausting exhaust gas from a combustion chamber. A first nitrogen oxide purification device is mounted at an upstream side of the exhaust line to primarily purify nitrogen oxides (NOx) included in the exhaust gas, and a second nitrogen oxide purification device is mounted to a downstream side of the first nitrogen oxide purification device to secondarily purify the NOx. A second injector is disposed between the first nitrogen oxide purification device and the first injector to additionally inject fuel for controlling an air/fuel ratio of the exhaust gas. 1. A control method of a nitrogen oxide purification system for removing NOx , the method comprising:determining, by a controller, a nitrogen oxide purification mode of a first nitrogen oxide purification device and a second nitrogen oxide purification device;determining, by the controller, a driving condition of an engine; andcompleting, by the controller, the nitrogen oxide purification mode.2. The control method of claim 1 , wherein the driving condition includes a low load driving condition claim 1 , a normal load driving condition claim 1 , and a high load driving condition.3. The control method of claim 1 , wherein the driving condition is determined depending on any combination of a rotational speed claim 1 , an output torque claim 1 , or a fuel amount of the engine.4. The control method of claim 1 , further comprising claim 1 , before the step of completing:maintaining an air/fuel ratio of exhaust gas which flows into the first nitrogen oxide purification device when it is determined that the driving condition is a normal or high load driving condition.5. The control method of claim 1 , further comprising claim 1 , before the step of completing:varying an air/fuel ratio of exhaust gas which flows into the first nitrogen oxide purification device when it is determined that the driving condition is a low load driving condition.6. The control method ...

CLOSE COUPLED SINGLE MODULE AFTERTREATMENT SYSTEM

An aftertreatment system includes a filtration and reduction unit. The filtration and reduction unit comprises a housing defining an internal volume. A filter is disposed in the internal volume and is configured to substantially remove particulates from the exhaust gas. A selective catalytic reduction system is disposed in the internal volume downstream of the filter and is configured to selectively reduce a portion of the exhaust gas. A first catalyst is formulated to oxidize at least a portion of the exhaust gas. An intake pipe is disposed upstream of the filtration and reduction unit and configured to communicate the exhaust gas o the filtration and reduction unit. The first catalyst is disposed in the intake pipe. An exhaust pipe is disposed downstream of the filtration and reduction unit. 1. An aftertreatment system , comprising:a housing including an inlet, an outlet and defining an internal volume;an intake pipe fluidly coupled to the inlet;a selective catalytic reduction system positioned within the internal volume defined by the housing; anda first catalyst positioned within the intake pipe, the intake pipe and the first catalyst being axially aligned with a longitudinal axis of the housing.2. The aftertreatment system of claim 1 , further comprising:a filter positioned within the internal volume defined by the housing, the filter positioned upstream of the selective catalytic reduction system.3. The aftertreatment system of claim 2 , further comprising:a body mixer positioned downstream of the filter and upstream of the selective catalytic reduction system within the internal volume defined by the housing, the body mixer structured to mix a reductant with an exhaust gas flowing through the aftertreatment system.4. The aftertreatment system of claim 2 , further comprising a differential pressure sensor positioned across the filter.5. The aftertreatment system of claim 1 , wherein the first catalyst comprises a diesel oxidation catalyst.6. The aftertreatment ...

FILTER FOR FILTERING PARTICULATE MATTER FROM EXHAUST GAS EMITTED FROM A COMPRESSION IGNITION ENGINE

A filter for filtering particulate matter (PM) from exhaust gas emitted from a compression ignition engine, which filter comprising a porous substrate having inlet surfaces and outlet surfaces, wherein the inlet surfaces are separated from the outlet surfaces by a porous structure containing pores of a first mean pore size, wherein the porous substrate is coated with a wash coat comprising a plurality of solid particles comprising a molecular sieve promoted with at least one metal wherein the porous structure of the wash coated porous substrate contains pores of a second mean pore size, and wherein the second mean pore size is less than the first mean pore size. 1. A filter for filtering particulate matter (PM) from an exhaust gas , the filter comprising:a. a wall flow filter having inlet and outlet surfaces and a porous substrate between the inlet and outlet surfaces, wherein the porous substrate has pores of a first mean pore size,b. a first washcoat coated on the inlet and/or outlet surface of the porous wall flow substrate and within the wall flow substrate, wherein the first washcoat has a second mean pore size that is less than the first mean pore size,wherein the filter further comprises a layer of a second washcoat, wherein the first washcoat and second washcoat layer have different formulations and wherein substantially none of the second washcoat enters the wall flow substrate, andwherein at least one of the first and second washcoats comprise a metal selected from Cu, Fe, Ce, Pt, Pd, or Rh.2. The filter of claim 1 , wherein the second washcoat layer is coated on the outlet surface of the wall flow filter.3. The filter of claim 1 , wherein the second washcoat layer is coated on the outlet surface of the wall flow filter.4. The filter of claim 1 , wherein either one or both of the inlet and outlet surfaces of the wall flow filter comprise a plurality of washcoat layers comprising the first washcoat layer and the second washcoat layer.5. The filter of claim ...

EMISSIONS CONTROL SYSTEMS AND METHODS

Methods and systems are provided related to an emissions control system. The emissions control system has an exhaust after-treatment system defining a plurality of distinct exhaust flow passages through which at least a portion of an exhaust stream can flow, e.g., the exhaust stream is produced by an engine. The emissions control system also includes a controller for controlling injection of reductant into the exhaust stream flowing through each of the flow passages. In one example, the emissions control system is configured for use in a vehicle, such as a locomotive or other rail vehicle. 1. A locomotive comprising:a platform;an engine mounted on the platform, the engine comprising an engine block and a turbocharger and configured to produce an exhaust stream during operation;an engine cab having a roof and plural side walls, the cab positioned over the engine and attached to the platform, wherein the cab defines a volume between the engine and the roof and side walls;a support structure at least partially positioned above the engine and within the volume, wherein the support structure comprises a base, a plurality of mounting legs, and a plurality of vibration reduction isolators;an exhaust after-treatment system having at least one exhaust after-treatment unit through which at least a portion of the exhaust stream is directed to flow, each exhaust after-treatment unit having at least one exhaust after-treatment component for treating the portion of the exhaust stream flowing through the unit; anda transition section attached between the turbocharger and the exhaust after-treatment system, the transition section configured to direct the exhaust stream from the turbocharger to the exhaust after-treatment system;wherein the plurality of mounting legs are respectively attached at a plurality of different mounting locations to at least one of the engine or the platform, the base is attached to all the legs and positioned above the engine, the plurality of isolators ...

ASYNCHRONOUS REDUCTANT INSERTION IN AFTERTREATMENT SYSTEMS

A method for asynchronously delivering a reductant to a first selective catalytic reduction system and a second selective catalytic reduction system of an aftertreatment system via a reductant insertion assembly, the reductant insertion assembly comprising a first injector fluidly coupled to the first selective catalytic reduction system and a second injector fluidly coupled to the second selective catalytic reduction system, the method including: activating the first injector; maintaining the first injector activated for a first delivery time, thereby inserting a first amount of reductant into the first selective catalytic reduction system; deactivating the first injector; activating the second injector; and maintaining the second injector activated for a second delivery time, thereby inserting a second amount of reductant into the second selective catalytic reduction system. 1. A method for asynchronously delivering a reductant to a first selective catalytic reduction system and a second selective catalytic reduction system of an aftertreatment system via a reductant insertion assembly , the reductant insertion assembly comprising a first injector fluidly coupled to the first selective catalytic reduction system and a second injector fluidly coupled to the second selective catalytic reduction system , the method comprising:activating the first injector;maintaining the first injector activated for a first delivery time, thereby inserting a first amount of reductant into the first selective catalytic reduction system;deactivating the first injector;activating the second injector; andmaintaining the second injector activated for a second delivery time, thereby inserting a second amount of reductant into the second selective catalytic reduction system.2. The method of claim 1 , wherein the first delivery time is equal to the second delivery time.3. The method of claim 1 , wherein the first amount of reductant is equal to the second amount of reductant.4. The method of ...

SYSTEMS AND METHODS FOR IDLE FUEL ECONOMY MODE

An apparatus includes a stored reductant determination circuit structured to determine an amount of stored reductant in a component of an exhaust aftertreatment system, and a fuel mode economy circuit structured to control an amount of reductant added to the exhaust aftertreatment system during an engine idle mode of operation based on the amount of stored reductant. 1. An apparatus comprising:a stored reductant determination circuit structured to determine an amount of stored reductant in a selective catalytic reduction (SCR) component of an exhaust aftertreatment system;a fuel mode economy circuit structured to control an amount of reductant added to the exhaust aftertreatment system during a standard engine idle mode of operation based on the amount of stored reductant, wherein the fuel mode economy circuit is structured to enter a fuel efficient engine idle mode in which the fuel mode economy circuit is inhibited from adding reductant during the fuel efficient engine idle mode in response to determining that a temperate in the SCR component is above a temperature threshold and in response to determining that an amount of time that the engine is in at least one of the standard engine idle mode and the fuel efficient engine idle mode is less than a fuel efficient idle time threshold.2. The apparatus of claim 1 , wherein the fuel mode economy circuit is further structured to control the amount of reductant added based on operation data regarding exhaust gas flowing through the exhaust aftertreatment system claim 1 , wherein the operation data includes an indication of an amount of nitrogen oxide exiting the exhaust aftertreatment system claim 1 , wherein in response to the amount of nitrogen oxide exiting the exhaust aftertreatment system being less than a threshold.3. The apparatus of claim 1 , wherein the fuel mode economy circuit is further structured to control the amount of reductant added based on operation data regarding exhaust gas flowing through the ...

Urea solution pumps having leakage bypass

Urea solution pumps having leakage bypass flowpaths and methods of operating the same are disclosed. Certain embodiments are pump apparatuses including an inlet passage in flow communication with a source of urea solution and a pump chamber, an outlet passage in flow communication with the pump chamber and an exhaust after treatment system, a diaphragm facing the pump chamber and coupled with an actuator, a first housing member coupled with a second housing member form a seal around the pumping chamber, a leak collection chamber surrounding the seal, and a return passage in flow communication with the leak collection chamber and the inlet passage. Urea solution that leaks from the pump chamber past the seal is received by the leak collection chamber and flows through the return passage to the pump inlet passage.

Urea injection systems valves

Apparatuses and methods for urea dosing of an exhaust after treatment system are disclosed. Exemplary apparatuses include a chamber configured to receive pressurized gas at a first inlet, receive urea solution at a second inlet and provide a combined flow of pressurized gas and urea to an outlet, flow passage extending from the first inlet to a seating surface, and a valve member configured to move between an open position in which the valve member is spaced apart from the seating surface and a closed position in which the valve member contacts the seating surface. As the valve member moves from the open position to the closed position, the valve member contacts the seating surface at a first location and wipes an area of the seating surface extending from the first location in a direction toward the flow passage.

Valve system

A valve comprising a base plate defining an inlet and outlet passageway. A cover plate is disposed on the base plate and defines a first and second channel. A pressure plate is disposed on the base plate and includes a first anchoring portion, a first sealing portion, and a first biasing portion connecting the first anchoring portion and the first sealing portion. Furthermore, a suction plate is disposed on the base plate and includes a second anchoring portion, a second sealing portion, and a second biasing portion connecting the second anchoring portion to the second sealing portion. The valve is movable between a first configuration, where the first sealing portion is distal to first channel and the second sealing portion is proximal to inlet passageway, and a second configuration, in which the first sealing portion is proximal to first channel, and second sealing portion is distal to inlet passageway.

Valve system

A valve comprising a base plate defining an inlet and outlet passageway. A cover plate is disposed on the base plate and defines a first and second channel. A pressure plate is disposed on the base plate and includes a first anchoring portion, a first sealing portion, and a first biasing portion connecting the first anchoring portion and the first sealing portion. Furthermore, a suction plate is disposed on the base plate and includes a second anchoring portion, a second sealing portion, and a second biasing portion connecting the second anchoring portion to the second sealing portion. The valve is movable between a first configuration, where the first sealing portion is distal to first channel and the second sealing portion is proximal to inlet passageway, and a second configuration, in which the first sealing portion is proximal to first channel, and second sealing portion is distal to inlet passageway.

发动机控制装置和发动机运转方法

本发明要解决的问题是：当SCR设备中发生异常时，为了促使对SCR设备进行修理，从而实现对SCR设备的适当维护。解决该问题的方法是：当检测到在SCR设备中发生的异常时，限制发动机的输出。为此目的，在一个实施例中，当异常发生时，将用于计算燃料喷射量的映射表从正常时间的映射表进行切换(S407)。此外，采用喷嘴的堵塞、贮存在贮存罐中的尿素水的稀释等作为将被检测到的异常。

Diesel exhaust fluid delivery system with pressure control

시스템을 통해 통과하는 유체의 전달 압력과 질량 흐름률을 조정하기 위한 디젤 배기 유체 전달 시스템 및 듀얼-가변 제어 전략이 제공된다. 시스템을 작동하기 위한 방법은 다음 두 가지 작동 모드들을 이용한다: 낮은 흐름률 및 높은 흐름률. 낮은 흐름률 작동 모드에서 작동하는 동안, DEF 펌프의 속도는 일정하게 유지되고, 배기 시스템으로의 DEF 전달은 역류 밸브를 제어함으로써 조정된다. 높은 흐름률 작동 모드에서 작동하는 동안, 역류 밸브는 폐쇄되고 펌프의 속도는 배기 시스템으로의 DEF 전달을 조절하도록 조정된다. A diesel exhaust fluid delivery system and a dual-variable control strategy are provided for adjusting the delivery pressure and mass flow rate of fluid passing through the system. The method for operating the system utilizes two operating modes: low flow rate and high flow rate. During operation in the low flow rate operating mode, the speed of the DEF pump is kept constant and the delivery of DEF to the exhaust system is regulated by controlling the backflow valve. During operation in the high flow rate operating mode, the backflow valve is closed and the speed of the pump is adjusted to regulate the delivery of DEF to the exhaust system.

Mixing plate as stabilizer for ammonia gas injector

A system for mixing ammonia (reductant) with engine exhaust includes an exhaust flow created by a vehicle engine, an ammonia feed line passing into the exhaust flow, an injector connected to the feed line and positioned within the exhaust flow, the injector having at least one port for discharging ammonia into the exhaust flow, and a mixing plate positioned within the exhaust flow downstream of the ammonia injector and stabilizing at least one of either the feed line and the injector. An aspect of the invention is to stabilize the injector by attaching the mixing plate to the feed line to provide such stability. Alternatively or additionally, the mixing plate is attached to the injector to stabilize. The feed line may even pass through the mixing plate.

分区涂布的过滤器、排放物处理系统和方法

本发明公开了废气处理过滤器、系统和方法。根据一个或多个实施方案，微粒过滤器被氧化催化剂分区涂布并用在包括NOx还原催化剂和任选NH3破坏催化剂的排放物处理系统或方法中。

Scr system and control method thereof

SCR 시스템 및 그 제어 방법이 개시된다. SCR 시스템은 SCR 촉매가 설치된 SCR 반응기; 터보차저를 거쳐 나오는 배기가스를 SCR 반응기로 유도하는 배기 라인; SCR 반응기 측에 열을 가하는 가열 장치; 엔진에서 터보차저로 배출되는 배기가스 일부를 바이패스시켜 SCR 반응기로 유도하는 바이패스 라인; 및 SCR 반응기의 온도를 기초로 가열 장치를 구동하고, 바이패스 라인을 통해 공급되는 배기가스 유량을 제어함으로써, SCR 반응기의 온도를 타겟 온도로 제어하는 제어부를 포함한다. 이에 따라, 배기가스 내 질소산화물(NOx) 제거 성능저하 또는 우레아 분해 성능저하 없이, 가열 장치의 연료 소모량을 저감하고 열 효율을 향상시킬 수 있게 된다. An SCR system and a control method thereof are disclosed. The SCR system comprises an SCR reactor equipped with an SCR catalyst; An exhaust line for leading the exhaust gas passing through the turbo charger to the SCR reactor; A heating device for applying heat to the SCR reactor side; A bypass line for bypassing a portion of the exhaust gas discharged from the engine to the turbocharger to the SCR reactor; And a control unit for controlling the temperature of the SCR reactor to a target temperature by driving the heating apparatus based on the temperature of the SCR reactor and controlling the flow rate of the exhaust gas supplied through the bypass line. As a result, the fuel consumption of the heating device can be reduced and the heat efficiency can be improved without deteriorating the nitrogen oxide (NOx) removal performance or the urea decomposition performance in the exhaust gas.

차량의 내연 기관의 배기 가스를 처리하기 위한 scr 시스템에서 사용하기 위한 수성 요소 용액을 보유하기 위한 주머니 조립체, 및 수성 요소 용액을 사용하여 차량의 내연 기관의 배기 가스를 처리하기 위한 시스템

본 출원은 차량의 내연 기관의 배기 가스를 처리하기 위한 선택적 촉매 환원 시스템에서 사용하기 위한 수성 요소 용액인 액체가 들어 있고, 액체 탱크의 외부로부터 차량의 액체 탱크로 액체를 이송하기 위한 주머니 조립체(100)에 관한 것이며, 주머니 조립체(100)는 가요성 주머니(1) 및 그에 부착된 스파우트(2)를 포함하고, 스파우트(2)는 주머니(1)의 벽에 제공된 개구(111)를 통해 축 방향으로 연장되고 개구(111)에 부착되는 베이스(21), 액체 탱크의 충전 중에 액체 탱크의 충전 넥(3)의 내부 통로에 삽입되도록 구성되는 상단부(22), 및 스파우트(2)의 베이스(21)와 상단부(22) 사이에서 연장되는 몸체(23) - 몸체(23)는 길쭉한 형상을 가지고, 몸체(23)는 액체 탱크의 충전 중에 액체 탱크의 충전 넥(3)의 내부 통로에서 적어도 부분적으로 연장되고, 베이스(21), 상단부(22), 및 몸체(23)는 액체의 방출 통로로 작용하는 길쭉한 방향 관통 통로(211)를 가짐 - 를 갖는다. 또한, 본 출원은 이러한 주머니 조립체(100) 및 액체 탱크를 충전하기 위해 스파우트(2)의 삽입을 허용하는 충전 넥(3)을 갖는 액체 탱크를 포함하는 시스템에 관한 것이다.

Hybrid dosing unit

An assembly provides a proportioned gas flow and includes a device that provides a pressurized flow of said gas, a release unit that releases the proportioned gas flow, and a chamber having an inlet fluidically connected to the device and an outlet fluidically connected to the release unit. The assembly further includes an admission valve inserted between the inlet of the chamber and the device, a metering valve inserted between the outlet of the chamber and the release unit, and a computer programmed to control the admission valve and the metering valve to provide a proportioned gas flow to the release unit. The assembly further comprises a calibrated orifice inserted between the outlet of the chamber and the release unit.

Selective catalytic reduction system

본 발명은 SCR 반응기에 환원제를 공급함에 있어서, SCR 반응기에 환원제를 공급하는 환원제 공급관을 우레아의 가수분해 공간으로 활용하고, 환원제 공급관에 SCR 배기가스가 공급되도록 함과 함께 환원제 공급관에 공급되는 SCR 배기가스의 양을 선택적으로 제어함으로써 우레아 가수분해에 요구되는 장치 구성을 간략화하고 우레아 가수분해에 소모되는 에너지를 최소화할 수 있는 SCR 장치에 관한 것으로서, 본 발명에 따른 SCR 장치는 환원제에 의한 질소산화물의 환원 반응이 진행되는 공간을 제공하는 SCR 반응기; 우레아의 가수분해 공간을 제공함과 함께 우레아의 가수분해에 의해 생성된 환원제를 상기 SCR 반응기로 공급하는 환원제 공급관; 상기 환원제 공급관의 일측에 연결되어, SCR 반응기로부터 배출되는 SCR 배기가스를 우레아의 가수분해가 진행되는 환원제 공급관의 일 구간에 공급하는 SCR 배기관; 상기 SCR 배기관을 통해 상기 환원제 공급관에 공급되는 SCR 배기가스의 양을 조절하는 SCR 배기가스 공급장치; 상기 환원제 공급관의 일단에 구비되어, 우레아의 가수분해가 진행되는 구간의 환원제 공급관 내부에 열을 인가하는 가열장치; 우레아의 가수분해가 진행되는 환원제 공급관의 일 구간에 배치된 온도센서; 상기 온도센서가 구비된 지점마다 배치되어, 환원제 공급관 내부에 우레아를 공급하는 우레아 공급노즐; 및 상기 온도센서로부터 입력되는 온도 신호가 미리 설정된 '최적의 우레아 가수분해 온도 범위'(이하, '기준온도'라 함)에 부합되는지 여부를 판단함과 함께, 기준온도보다 낮은 경우 환원제 공급관에 공급되는 SCR 배기가스의 양이 증가되도록 상기 SCR 배기가스 공급장치를 제어하고, 기준온도보다 높은 경우 환원제 공급관에 공급되는 SCR 배기가스의 양이 감소되도록 SCR 배기가스 공급장치를 제어하는 제어장치를 포함하여 이루어지는 것을 특징으로 한다. In the present invention, when the reducing agent is supplied to the SCR reactor, the reducing agent supply pipe for supplying the reducing agent to the SCR reactor is used as the hydrolysis space of the urea, the SCR exhaust gas is supplied to the reducing agent supply pipe, The present invention relates to an SCR apparatus capable of minimizing the energy consumed in urea hydrolysis by selectively controlling the amount of gas, thereby simplifying the apparatus configuration required for urea hydrolysis. An SCR reactor for providing a space where the reduction reaction proceeds; A reducing agent supply pipe for supplying a reducing agent produced by hydrolysis of urea to the SCR reactor while providing a hydrolysis space of urea; An SCR exhaust pipe connected to one side of the reducing agent supply pipe to supply SCR exhaust gas discharged from the SCR reactor to a section of a reducing agent supply pipe where hydrolysis of urea proceeds; An SCR exhaust gas supply device for regulating the amount of SCR exhaust gas supplied to the ...