Abstract: A mixing element positioned at an exhaust outlet of a Selective Catalytic Reduction (SCR) module is provided. The mixing element includes a base plate having an upper surface and a lower surface. The base plate is configured to deflect a portion of a flow of a fluid around the upper surface thereof. The mixing element also includes a plurality of vanes attached to the lower surface of the base plate in a spaced apart arrangement. The plurality of vanes is configured to induce a swirling effect in a flow of the fluid received therebetween.

Abstract: A mixing and/or evaporating device (12) for an exhaust system (5) of a combustion engine (1), in particular of a motor vehicle, includes a support body (19), which encloses a flat cross section through which a flow can flow running transversely to the axial direction (20) of the device (12) in the circumferential direction (32). The support body (19) comprises two long side walls (21, 22) located opposite each other and two short side walls (23, 24) located opposite each other, wherein the short side walls (23, 24) each connect the two long side walls (21, 22) with each other. At least on one long side wall (21, 22) at least on one axial end (26, 27), a plurality of guide blades (25) is arranged. The guide blades (25) stand away in a direction of the other long side wall (21, 22) and are angled relative to the axial direction (20).

Abstract: A Diesel Exhaust Fluid (DEF) that includes urea, demineralized water and between 5 and 300 ppm formaldehyde, acetaldehyde, propianaldehyde, or butyraldehyde, and this formulation of DEF include less than 0.6 ppm of phosphates, calcium, iron, aluminum, magnesium, sodium, and potassium, the formulation also includes less than 0.3 ppm copper, zinc, chromium, and nickel. This formulation of DEF reduces the accumulation of urea deposit in the diesel exhaust system relative to other formulation of specification grade DEF that include less formaldehyde.

Abstract: A reducing agent tank includes a tank body storing reducing agent and a cylindrical gauge member visually indicating a storage amount of the reducing agent inside the tank body. The gauge member is in communication with an inside of the tank body. The tank body has a replenishment port to replenish the reducing agent. The gauge member is provided on a first wall surface of a plurality of wall surfaces defining the tank body. The gauge member is provided in a slanted manner relative to a bottom plate of the tank body. The replenishing port and the gauge member are disposed in a row along a direction that extends along the first wall surface as seen in a plan view.

Abstract: The phenomenon of resonance in a catalyst converter due to a flow of an exhaust gas is reduced without causing problems with vehicle layout, problems with manufacturing (higher manufacturing cost), or adverse influences on other facets of performance. An internal combustion engine includes an internal combustion engine main body having a fuel chamber formed in an interior, and a catalyst converter arranged in an exhaust flow channel of the internal combustion engine main body and provided with a catalyst for purifying the exhaust gas. The exhaust flow channel, which is upstream of the catalyst of the catalyst converter, is provided with a protuberance for disturbing the flow of the exhaust gas in the exhaust flow channel to reduce pressure pulsations of the exhaust gas.

Abstract: An exhaust system for an engine is provided herein. The exhaust system includes an emission control device and an exhaust manifold having a plurality of runners merging at a confluence section positioned upstream of the emission control device. The exhaust system further includes a mixer plate positioned in the confluence section, the mixer plate including a central opening and a plurality of louvered vents positioned axially around the central opening, the louvered vents having angled openings facing a common rotational direction.

Abstract: An exhaust gas system of an internal combustion engine, in particular for a vehicle, includes an exhaust gas conveying duct, at least one insert disposed in the exhaust gas conveying duct for purifying the exhaust gas, an injection system disposed upstream of the insert in the flow path and a turbulizer disposed between the injection system and the insert. A flow rectifier is provided in the exhaust gas conveying duct between the turbulizer and the insert.

Abstract: An engine has an exhaust gas treatment apparatus attached thereto, wherein an exhaust pipe can be prevented from being damaged by a vibration of the engine body. An exhaust gas treatment apparatus is supported by an engine body and the engine body and the exhaust gas treatment apparatus communicate with each other through an exhaust pipe. The casing of the exhaust gas treatment apparatus consists of a plurality of casing units separable from each other. Connection flanges are disposed in respective end portions of the casing units. The casing units are coupled together by a connection of the connection flanges, and the exhaust gas treatment apparatus is supported by the engine body through the connection flanges.

Abstract: A power generation system capable of eliminating NOxcomponents in the exhaust gas by using a 3-way catalyst, comprising a gas compressor to increase the pressure of ambient air fed to the system; a combustor capable of oxidizing a mixture of fuel and compressed air to generate an expanded, high temperature exhaust gas; a turbine that uses the force of the high temperature gas; an exhaust gas recycle (EGR) stream back to the combustor; a 3-way catalytic reactor downstream of the gas turbine engine outlet which treats the exhaust gas stream to remove substantially all of the NOx components; a heat recovery steam generator (HRSG); an EGR compressor feeding gas to the combustor and turbine; and an electrical generator.

Abstract: A treatment device configured to receive a flow of exhaust from a power source is disclosed. The treatment device may have a first layer, a second layer, and a substrate layer. The first layer may include a selective catalytic reduction layer, and the second layer may be disposed downstream of the first layer and include an oxidation catalyst support. The substrate layer may be disposed adjacent to the second layer. Additionally, an additive may be disposed downstream of the first layer. The additive may be operative to substantially prohibit migration of a component of the second layer to the first layer upon treatment of the flow of exhaust by the oxidation catalyst support.

Abstract: Methods and systems for controlling reductant levels in an SCR catalyst are provided. In one aspect, reductant levels are adjusted in response to a ratio of change of NOx conversion efficiency to a change of reductant level. In another aspect, reductant injection levels are periodically adjusted to see if NOx conversion efficiency is better or worse at the adjusted levels.

Abstract: An exhaust gas emission control system for a diesel engine, having an oxidation catalyst (DOC) (7) and a diesel particulate filter (DPF) (9) in an exhaust passage, wherein a late post-injection control unit (62), which injects fuel into a combustion chamber at a timing not contributing to combustion in DPF regeneration control, feedback controls a late post-injection amount such that a regeneration amount of soot regenerated by the DPF (9) becomes a target soot regeneration amount per unit time.

Abstract: A catalyst deterioration diagnosis method for diagnosing deterioration of a catalyst for purification of exhaust gas by using a test catalyst disposed in an exhaust gas flow path through which the exhaust gas flows, the method including an exhaust gas control step of inverting an air-fuel ratio of the exhaust gas in the flow path from a lean side to a rich side or from a rich side to a lean side; a measurement step of measuring a change over time in electrical resistance of the test catalyst at the inversion of the air-fuel ratio and finding a resistance change ratio of the test catalyst; and a determination step of determining catalytic deterioration of the test catalyst based on the resistance change ratio.

Abstract: Methods are disclosed for reducing or preventing a selective catalytic reduction (SCR) catalyst disposed on a first substrate monolith in an exhaust system of a lean-burn internal combustion engine from becoming poisoned with platinum group metal (PGM) which may volatilize from a catalyst composition comprising PGM disposed on at least one second substrate monolith upstream of the SCR catalyst. The methods comprise adsorbing volatilized PGM in at least one PGM trapping material, which is disposed on a third substrate monolith disposed between the first substrate monolith and the second substrate monolith.

Abstract: An exhaust gas post treatment system for an internal combustion engine, including an intake device for taking hydrocarbons into an exhaust gas pipe carrying the exhaust process gas from the internal combustion engine and a treatment device through which exhaust process gas flows downstream of the intake location and which increases the exhaust process gas temperature by oxidation of the hydrocarbons taken in. An exhaust gas post treatment system and a method for operating the same, in that the treatment device has catalytically coated components, the hydrocarbons are at least partly evaporated in the intake device and are modified chemically by cracking reactions and/or by partial oxidation, and the proportion of platinum, at least in a subregion of the catalytic coating of the components, is less than 50% of the overall mass of all the catalytically active substances in this sub region of the coating.

Abstract: The invention relates to an exhaust control device of an engine (10) comprising a catalyst (45) in an exhaust passage (40). In this invention, the active element transforms as a solid solution in the carrier when a catalyst temperature is higher than or equal to a predetermined solid solution temperature and an atmosphere in the catalyst is an oxidation atmosphere and the active element precipitates from the carrier when the catalyst temperature is higher than or equal to a predetermined precipitation temperature and the atmosphere in the catalyst is a reduction atmosphere.

Abstract: An emission control catalyst composition comprising a supported bimetallic catalyst consisting of gold and a metal selected from the group consisting of platinum, rhodium, ruthenium, copper and nickel is disclosed. Also disclosed is a catalytic convertor comprising a substrate monolith coated with the emission control catalyst composition and a lean burn internal combustion engine exhaust gas emission treatment system comprising the catalytic convertor. A variety of processes for preparing the catalyst composition are claimed.

Abstract: A V-type engine includes two exhaust manifolds connected to two cylinder banks. First and second exhaust ports, respectively provided in the two cylinder banks, are disposed at an inner side of V-shaped lines. Each exhaust manifold includes N branch pipes and a collecting pipe, where N is an integer not less than 2. The N branch pipes are respectively connected to N exhaust ports including at least one of the first exhaust ports and at least one of the second exhaust ports. The collecting pipe is disposed adjacent to N cylinders that are aligned in a direction parallel or substantially parallel to a crank axis direction and extends from one end to the other end of the N cylinders.

Abstract: An exhaust-gas aftertreatment system (1) for a motor vehicle having a turbocharged internal combustion engine (2) comprises a large-volume lean NOx trap (5) which is connected by means of a short connecting pipe (4) to an outlet of the turbocharger (3), wherein the lean NOx trap (5) has a first region (6) for the storage and/or reduction of NOx and oxidation of NO to form NO2 and/or reduction of hydrocarbon and/or carbon monoxide in the exhaust gas, and a downstream second region (7) for the storage and/or reduction of nitrogen oxides in the exhaust gas.

Abstract: Described are catalyst compositions, catalytic articles, methods of manufacturing catalytic articles and exhaust gas treatment systems and methods that utilize the catalytic articles. The catalyst composition comprises an oxidation catalyst comprising a washcoat layer including a platinum group metal supported on a refractory metal oxide support and porous molecular sieve particles having internal pores, the molecular sieve particles protected by a protecting material selected from an organic wax encapsulating the molecular sieve particles, a polymer encapsulating the molecular sieve particles, an inorganic oxide deposited on the surface of the molecular sieve particles, or an organic compound filling the internal pores of the molecular sieve particles, wherein the protecting material prevents interaction of the molecular sieve particles with the platinum group metal.

Abstract: A method for operating an exhaust gas treatment system that includes an SCR catalytic converter is provided. Either a model-based filling level regulation for achieving the target filling level or a model-based efficiency control for achieving the target efficiency is performed according to presettable values for certain operating variables such as a temperature of the exhaust gas or of the SCR catalytic converter.

Abstract: A diesel particulate filter (“DPF”) system that is more convenient than a conventional DPF system, including a DPF having a catalyzed soot filter (“CSF”) that is connected to an exhaust pipe of a diesel engine in order to collect particulate matter (“PM”) in exhaust gas, and a diesel oxidation catalyst (“DOC”) provided on an upstream side of the CSF; and temperature sensors provided respectively on an upstream side and a downstream side of the DOC. When a PM accumulation amount in the CSF exceeds a fixed amount, DPF regeneration is performed by setting a temperature detected by the upstream side temperature sensor at or above a first threshold and setting a temperature detected by the downstream side temperature sensor at or above a second threshold. When a breakdown is detected in the upstream side temperature sensor, the second threshold is modified upward.

Abstract: An aftertreatment module for the treatment of exhaust gasses from a power system includes a first aftertreatment brick and a second aftertreatment brick. The first and second aftertreatment bricks can be flow-through type catalysts for catalyzing byproducts in the exhaust gasses. The aftertreatment module can include a first channel directing the incoming exhaust gasses in a first direction through the first aftertreatment brick and a second channel directing the exhaust gasses through the second aftertreatment brick. The first and second channel can be in a side-by-side arrangement. To communicate the exhaust gasses between the first and second channels, a traverse channel can redirect the gas flow within the aftertreatment module.

Abstract: An exhaust gas aftertreatment system for an internal combustion engine, particularly for a ship's diesel engine operated with heavy oil, has a SCR catalyst that uses ammonia as reductant. A nozzle is positioned upstream of the SCR catalyst viewed in flow direction of the exhaust gas. Using the nozzle, an aqueous urea solution is decomposed at a defined pressure and at a defined temperature to form water vapor, carbon dioxide and ammonia vapor such that ammonia evaporated by the nozzle is injected into the exhaust gas via the nozzle.

Abstract: The exhaust gas purification device includes an exhaust gas post-processing device 30 provided in an exhaust passage 11 of an engine 10, an exhaust injection valve 22, a first catalyst 35, a second catalyst 36 for thermally decomposing fuel injected by the exhaust injection valve 22, an exhaust temperature estimation unit 41 for estimating an exhaust temperature, an engine injection control unit 42 for controlling fuel injection in the engine 10, and regeneration control units 43, 44 for controlling regeneration of the exhaust gas post-processing device 30. When an output value output by the exhaust gas temperature estimation unit 41 is equal to or lower than a threshold during regeneration by the regeneration control units 43, 44, the engine injection control unit 42 controls fuel injection in the engine by performing a multistage injection, which includes a post injection for supplying fuel to the first catalyst 35.

Abstract: An exhaust system for a variable cylinder engine for assuring purification of exhaust gas without increasing the number of catalysts and an intake system for purifying blow-by gas. The exhaust system includes an activation side exhaust pipe connected to an activation cylinder group that operates normally. A deactivation side exhaust pipe is connected to a deactivation cylinder group wherein fuel supply is stopped under a particular condition. A gathering section is connected to downstream ends of the activation side exhaust pipe and the deactivation side exhaust pipe with a sub-catalyst disposed in the activation side exhaust pipe and a main catalyst disposed at the gathering section. The main catalyst is formed wherein gas passing therethrough is partitioned into flows independent of each other in a flow path direction. The activation side exhaust pipe and the deactivation side exhaust pipe are connected in a mutually independent state to the main catalyst.

Abstract: Described is a selective catalytic reduction catalyst comprising an 8-ring small pore molecular sieve promoted with copper and an alkaline earth component. The catalyst is effective to catalyze the reduction of nitrogen oxides (NOx) in the presence of a reductant. A method for selectively reducing nitrogen oxides is also described.

Abstract: A guidance output device, which outputs guidance for improving fuel economy when an energy wasting operation is detected in a construction machine that is provided with an exhaust gas purifying device for an internal combustion engine, includes a regeneration process determining unit that determines whether a regeneration process is in progress in the exhaust gas purifying device. It also includes a guidance output restriction unit that restricts an output of the guidance for energy saving by the guidance output unit when the regeneration process determining unit determines that the regeneration process is in progress in the exhaust gas purifying device.

Abstract: A Diesel Exhaust Fluid (DEF) that includes urea, demineralized water and between 5 and 300 ppm formaldehyde, this formulation of DEF include less than 0.6 ppm of phosphates, calcium, iron, aluminum, magnesium, sodium, and potassium, the formulation also includes less than 0.3 ppm copper, zinc, chromium, and nickel. This formulation of DEF reduces the accumulation of urea deposit in the diesel exhaust system relative to other formulation of specification grade DEF that include less formaldehyde.

Abstract: A selective catalytic reduction (SCR) system that can detect whether or not a float is stuck even where a water level sensor that detects a liquid level in a stepwise manner is used, including: an urea injection quantity integrating unit that integrates an injected quantity of urea to calculate an urea injection quantity integrated value; an integrated value resetting unit that, if a detected value from detection means changes, resets the urea injection quantity integrated value; and an abnormality determination unit that, if the urea injection quantity integrated value exceeds a predetermined threshold value for determination, determines a level sensor as having an abnormality.

Abstract: An exhaust system is described including an exhaust manifold having different length runners, with an emission control device housing a plurality of catalyst bricks, at least one of which having a multi-cell density. In this way, uneven exhaust mixing may be addressed without modifying packaging of the exhaust system.

Abstract: An exhaust purification system of an internal combustion engine, which includes: a silver-alumina-based catalyst, which is arranged in an engine exhaust system and, when an air-fuel ratio of exhaust gas is leaner than a stoichiometric air-fuel ratio, releases adsorbed NO2 at a first set temperature and adsorbed NO at a second set temperature, a secondary air feed passage configured to suppress a temperature rise of the silver-alumina-based catalyst; and an electronic control unit, that: controls the air flow through the secondary air feed passage to: when the silver-alumina-based catalyst has reached a third set temperature, suppress a temperature rise of the silver-alumina-based catalyst to maintain the silver-alumina-based catalyst near the third set temperature, and then lift the suppression of the temperature rise of the silver-alumina-based catalyst so that at least part of the NO adsorbed at the silver-alumina-based catalyst, is oxidized to NO2 to be adsorbed at the silver-alumina-based catalyst.

Abstract: A compression-ignition engine is coupled to an exhaust aftertreatment system including a particulate filter. A method of operating the compression-ignition engine includes executing a feed-forward control scheme to determine an amount of post-combustion fuel to achieve a preferred temperature in the exhaust gas feedstream at an inlet to the particulate filter. The amount of post-combustion fuel is a nominal post-combustion fuel amount adjusted for a biodiesel blend ratio of the fuel. The post-combustion fuel is injected upstream of the exhaust aftertreatment system in response to a command to regenerate the particulate filter.

Abstract: A device for conveying a liquid reducing agent from a tank to a supply element includes a connecting element for connecting a reducing agent line, a system heating unit and a heat-conducting structure configured to transport heat from the system heating unit to the connecting element. A motor vehicle having the device is also provided.

Abstract: An exhaust gas purification device capable of enhancing handling operability such as maintenance of an engine includes two gas purification bodies which purity exhaust gas discharged from the engine, inner cases in which the gas purification bodies are incorporated, and outer cases in which the inner cases are incorporated. The outer cases are arranged side by side in a moving direction of exhaust gas and connected to each other. One of the adjoining inner cases is inserted into the other inner case to form a double-layer structure. A loosely-fitting gap is formed between an inner side surface of the one inner case and an outer side surface of the other inner case.

Abstract: A waste heat recovery (WHR) system operates in a reverse mode, permitting using the WHR system to transfer heat to the exhaust gas of an internal combustion engine. In another configuration, a WHR system may operate in two modes. The first mode removes heat from exhaust gas of an engine to perform useful work. The second mode transfers heat to the exhaust gas. The benefit of this flexible system is that a WHR system is adaptable to rapidly heat exhaust gas at startup and during other conditions where the temperature of the exhaust gas is less than a predetermined operating range. Because of the ability to rapidly warm engine exhaust gas, an exhaust gas receiving system, such as an EGR or an aftertreatment system, may function to reduce the emissions of the engine more quickly. Because this system is reversible, it retains the capability of a conventional WHR system.

Abstract: An integrated exhaust gas after-treatment system for eliminating pollutants present in exhaust gases is disclosed. The integrated exhaust gas after-treatment system includes a Diesel Oxidation Catalyst (DOC)-Diesel Particulate Filter (DPF) assembly, a Selective Catalytic Reduction (SCR), a dosing module and a reducing agent supply system. The Diesel Oxidation Catalyst (DOC)-Diesel Particulate Filter (DPF) assembly is connected to an exhaust gas manifold of an engine and includes a canister for holding a Diesel Oxidation Catalyst (DOC) and a Diesel Particulate Filter (DPF). The Diesel Particulate Filter (DPF) is disposed downstream of the Diesel Oxidation Catalyst (DOC) and is spaced there-from. The Selective Catalytic Reduction (SCR) is disposed downstream of the Diesel Oxidation Catalyst (DOC)-Diesel Particulate Filter (DPF) assembly and facilitates elimination of NOx present in the exhaust gases by reduction of the NOx.

Abstract: An exhaust-gas aftertreatment device for an internal combustion engine includes a catalytic converter having a tubular member which defines a volume housing a catalytic converter substrate. The volume housing the catalytic converter substrate communicates with an inlet portion for receiving exhaust gas from the engine and with an outlet portion for discharging the exhaust gas after catalytic conversion thereof in the volume. The device further has a pipe member within the tubular member which connects the inlet portion with the volume in the tubular member and guides the exhaust gas from the inlet portion in a first direction of flow. The pipe member opens downstream into a deflector which deflects the exhaust gas into the volume of the tubular member in a second direction of flow other than the first direction of flow. Unburned liquid fuel contained in the exhaust gas is deposited on the deflector for later evaporation.

Abstract: An engine exhaust aftertreatment component includes a housing defining an exhaust flow path from an exhaust inlet to an exhaust outlet. The housing supports an internal support channel. An aftertreatment brick module includes a catalytic brick, a can configured to receive the catalytic brick, and an end plate disposed along an end of the can. The end plate includes a coupling mechanism configured to be received within the internal support channel.

Abstract: Described is a catalyst comprising a substrate and a catalyst coating of two or more layers: (a) a first layer comprising Pd and Rh on the substrate; and (b) a second layer comprising Pt and/or Pd on the first layer; these layers each further comprising: one or more particulate support materials; one or more oxygen storage component (OSC) materials; and one or more nitrogen oxide storage materials comprising one or more elements selected from the group of alkali and/or alkaline earth metals, wherein the total amount of alkali and alkaline earth metals ranges from 0.18 to 2.0 g/in3 calculated as the respective alkali metal oxides M2O and alkaline earth metal oxides MO. Also described is a method for the production of a catalyst, as well as a process for the treatment of a gas stream, in particular of an exhaust gas stream resulting from an internal combustion engine.

Abstract: A supercharging device of a bifuel engine using a gas fuel and a liquid fuel as fuels, and having a supercharger supercharging or turbocharger turbocharging a large amount of intake air into a combustion chamber of the engine by driving a compressor arranged in an intake passage of the engine by an output shaft of the engine or an electric motor, performs the compressing by the compressor of the supercharger or turbocharger when the gas fuel is used, and does not perform the supercharging or turbocharging by the compressor of the supercharger or turbocharger when the liquid fuel is used.

Abstract: Provided are a holding material for a gas treatment device, which is inexpensive, has a simple structure, and exhibits high holding force, a gas treatment device, and a method for manufacturing the same. A holding material for a gas treatment device according to the present invention is a holding material, which is a holding material to be arranged, in a gas treatment device including a treatment structure and a casing for housing the treatment structure, between the treatment structure and the casing, the holding material including silica fibers and an alumina sol in an amount of 3 parts by mass or more in terms of a solid content with respect to 100 parts by mass of the silica fibers.

Abstract: An oxidation catalyst is described for treating an exhaust gas from a diesel engine, which oxidation catalyst comprises: a substrate; a first washcoat region disposed on the substrate, wherein the first washcoat region comprises a first platinum group metal (PGM) and a first support material; a second washcoat region adjacent to the first washcoat region, wherein the second washcoat region comprises a second platinum group metal (PGM) and a second support material; a third washcoat region disposed on the substrate, wherein the third washcoat region comprises a third platinum group metal (PGM) and a third support material; and wherein either: (i) the third washcoat region is adjacent to the second washcoat region; or (ii) the second washcoat region is disposed or supported on the third washcoat region. Also described are uses and methods involving the oxidation catalyst.

Abstract: The present invention is intended to suppress, in an exhaust gas purification system for an internal combustion engine capable of mixing and combusting liquid fuel and compressed natural gas, an excessive rise in temperature of an exhaust gas purification device at the time when the exhaust gas purification device is caused to regenerate. In the exhaust gas purification system for an internal combustion engine according to the present invention, when the liquid fuel and the compressed natural gas are caused to mix and combust in the internal combustion engine at the time of regenerating the exhaust gas purification device, an amount of HC to be supplied to the exhaust gas purification device from an HC supply device is decreased in comparison with the time when only the liquid fuel is caused to combust in the internal combustion engine.

Abstract: The present invention relates to a method for achieving reduced emissions at cold start of an internal combustion engine having an exhaust gas after treatment system comprising at least one Diesel Oxygen Catalyst (DOC), at least one Diesel Particulate Filter (DPF) and a Selective Catalytic Reduction (SCR) unit, comprising the steps of: heating the DOC prior to cold starting said internal combustion engine, starting and controlling the internal combustion engine towards low NOx emission when said DOC has reached a predetermined temperature, optimizing the fuel consumption at a given total emission level when said DPF and SCR has reached a predetermined temperature.

Abstract: An exhaust gas purification system for an internal combustion engine, which is provided with: a selective reduction type catalyst arranged in an exhaust passage of the internal combustion engine; a low pressure EGR mechanism that is equipped with a low pressure EGR passage for introducing a part of an exhaust gas flowing through a portion of the exhaust passage downstream of a turbine of a centrifugal supercharger to a portion of an intake passage upstream of a compressor as a low pressure EGR gas, and a low pressure EGR valve for changing a channel cross section of the low pressure EGR passage; a supply device.

Abstract: An exhaust gas purifying apparatus for an internal combustion engine includes a lean control unit and a rich control unit. The lean control unit executes lean spike operation, in which an air-fuel ratio is temporarily changed in a lean direction by a lean change width relative to a reference air-fuel ratio. The rich control unit changes the air-fuel ratio in a rich direction by a rich change width relative to the reference air-fuel ratio after the lean control unit executes the lean spike operation such that the air-fuel ratio stays in a predetermined slightly rich region. The rich change width is smaller than the lean change width.

Abstract: One embodiment of the invention may include a method comprising providing a product comprising a substrate comprising a perovskite catalyst, NOx stored in or on the substrate and particulate matter in or on the substrate; releasing at least some of the stored NOx and oxidizing the released NOx to form NO2, and reacting the NO2 with carbon in the particulate matter to form at least one of CO or CO2.

Abstract: A device for storing and supplying ammonia to an exhaust line of an automobile vehicle, includes a solid material provided for absorbing the ammonia, a reservoir for storing the solid material, and a heating unit to heat the solid material to desorb the ammonia. The solid material comprises solid elements with a mass of less than 50 grams. The heating unit is insulated from the reservoir. The device also includes a first assembly for transferring solid elements from the reservoir to the heating unit.

Abstract: A catalyzed soot filter for a diesel engine comprises a wall flow substrate having a substrate axial length, wherein surfaces of both the internal walls of a plurality of inlet and a plurality of outlet channels comprise a catalytic washcoat of at least one on-wall coating composition for oxidizing NO in exhaust gas to NO2, wherein the washcoat on the inlet channels extends for an axial inlet coating length from an open inlet end to a downstream inlet coating end, the washcoat on the outlet channels extends for an axial outlet coating length from an upstream outlet end to an open outlet end, the axial inlet coating length and the axial outlet coating length are both less than the substrate axial length and the outlet coating length is greater than the inlet coating length.