| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 060301000 | Reducing type catalyst | 51 |
| 20090199550 | Catalytic Converter Assembly in an Exhaust Gas Posttreatment System - The invention relates to a catalyst arrangement in an exhaust gas after-treatment system of an internal combustion engine comprising an exhaust gas line in which an SCR catalyst is positioned in the direction of flow of the exhaust gas. A reducing agent production system has an NOx and CO/H2 production unit and a combined NOx storage/ammonia production unit in the standard gas-carrying path of the reducing agent production system which supplies ammonia as the reducing agent. The NOx and CO/H2 production unit is at least temporarily supplied via a fuel supply and an air supply with starting products for producing ammonia. The combined NOx storage/ammonia production unit has a plurality catalyst sections having different characteristic properties or functionalities, enabling a higher ammonia yield in the combined NOx storage/ammonia production unit. The catalyst formulations make it possible to adjust a temperature profile that additionally influences the ammonia production rate and contributes to higher ammonia yields. | 08-13-2009 |
| 20100077739 | Exhaust system implementing dual stage SCR - An exhaust system for use with an engine is disclosed. The exhaust system may have a passageway, a flow control device situated to feed reductant into the passageway, and a particulate collection device located in fluid communication with the passageway downstream of the flow control device. The particulate collection device may be catalyzed to promote NO | 04-01-2010 |
| 20130047589 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, an upstream side air-fuel ratio sensor ( | 02-28-2013 |
| 20130055703 | EXHAUST GAS PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - An object of the present invention is to increase the flexibility in the layout of an exhaust gas purification system for an internal combustion engine including selective catalytic reduction catalyst provided in an exhaust passage of the internal combustion engine and an addition device for supplying reducing agent derived from ammonia to the selective catalytic reduction catalyst, without a deterioration of the performance in reducing nitrogen oxides. To achieve the object, the exhaust gas purification system for an internal combustion engine according to the present invention is configured to supply hydrocarbon at the same time when reducing agent derived from ammonia is supplied to the selective catalytic reduction catalyst, thereby producing reducing agent that is hard to be oxidized by a precious metal catalyst. | 03-07-2013 |
| 20120247092 | Multi-Component Filters For Emissions Control - Catalytic articles, systems and methods for treating exhaust gas streams are described. A catalytic article comprising a wall flow filter having gas permeable walls, a hydrolysis catalyst, an optional soot oxidation catalyst, a selective catalytic reduction catalyst permeating the walls, an ammonia oxidation catalyst and an oxidation catalyst to oxidize CO and hydrocarbons is described. Methods of treating exhaust gas streams comprising soot, an ammonia precursor such as urea, ammonia, NO | 10-04-2012 |
| 20090038299 | Reducing agent injector having purge heater - A method of introducing a reducing agent into an exhaust stream may include injecting the reducing agent into the exhaust gas stream using a reducing agent injector. The method may further include selectively heating a nozzle of the reducing agent injector to reduce residue on the nozzle. | 02-12-2009 |
| 20110271664 | Integrated SCR and AMOX Catalyst Systems - Catalysts and catalytic articles for treating exhaust gas streams are described. In one or more embodiments, a catalyst system includes a first zone to abate nitrogen oxides by selective catalytic reduction, a second zone to oxidize ammonia and a third zone to oxidize carbon monoxide and hydrocarbons. Methods for treating the exhaust gas stream are also provided. Methods of making and using such catalysts and catalytic articles are also described. | 11-10-2011 |
| 20110271665 | AIR-FUEL RATIO IMBALANCE AMONG CYLINDERS DETERMINING APPARATUS FOR AN INTERNAL COMBUSTION ENGINE - An air-fuel ratio imbalance among cylinders determining apparatus (a determining apparatus) according to an aspect of the present invention, obtains a parameter X for imbalance determination which becomes larger as a variation of an air-fuel ratio of an exhaust gas passing through a position at which the air-fuel ratio sensor is disposed becomes larger, based on an output value Vabyfs of an air-fuel ratio sensor | 11-10-2011 |
| 20080202107 | SCR ON LOW THERMAL MASS FILTER SUBSTRATES - Provided are selective catalytic reduction (SCR) filters that effectively provide simultaneous treatment of particulate matter and NO | 08-28-2008 |
| 20080250778 | Excess NH3 storage control for SCR catalysts - A method of regulating an amount of NH3 stored in a catalyst of an exhaust after-treatment system includes determining a mass of NH3 into the catalyst based on a dosing rate of a dosing agent that is injected into an exhaust stream upstream of the catalyst and determining a mass of NH3 out of the catalyst. An accumulated mass of NH3 within the catalyst is calculated based on the mass of NH3 into the catalyst and the mass of NH3 out of the catalyst. The dosing rate is regulated based on the accumulated mass of NH3 within the catalyst. | 10-16-2008 |
| 20090107126 | Fluid supply connection for reductant delivery unit for selective catalytic reduction systems - A reductant delivery unit ( | 04-30-2009 |
| 20100077738 | System for Reducing NOx in Exhaust - Systems and methods are provided for reducing NOx emissions from a vehicle including an engine having an exhaust. In one example, the system comprises a NOx reducing system coupled to the engine exhaust including a base metal zeolite, said NOx reducing system including a first layer with a first pore size and a second layer with a second pore size, said first pore size being smaller than said second pore size. | 04-01-2010 |
| 20100101221 | CATALYSTS, SYSTEMS, AND METHODS FOR REDUCING NOx IN AN EXHAUST GAS - Catalysts, systems, and methods disclosed herein provide for reduced NO | 04-29-2010 |
| 20110214416 | EXHAUST EMISSION CONTROL DEVICE - An object of the invention is to make it possible to introduce exhaust gas | 09-08-2011 |
| 20090255241 | Method of Forming a Catalyzed SCR Filter - Provided is an emission treatment system and method for simultaneously remediating the nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The emission treatment system has an oxidation catalyst upstream of a soot filter coated with a material effective in the Selective Catalytic Reduction (SCR) of NOx by a reductant, e.g., ammonia. Also provided is a method for disposing an SCR catalyst composition on a wall flow monolith that provides adequate catalyst loading, but does not result in unsuitable back pressures in the exhaust. | 10-15-2009 |
| 20100132345 | MIXING DEVICES FOR SELECTIVE CATALYTIC REDUCTION SYSTEMS - A selective catalytic reduction (SCR) system includes an exhaust pipe for receiving an exhaust gas from an engine. A selective catalytic reduction (SCR) unit is provided downstream of the exhaust pipe. A first mixing element including a meshed body defines a first surface, a second surface, and a plurality of openings extending from the first surface to the second surface. The first surface and second surface are parallel to each other and define an angle relative to a flow direction of the exhaust flow. The angle is less than 90 degrees. | 06-03-2010 |
| 20100005790 | Selective Catalytic Reduction (SCR) Catalyst Injection Systems - A Selective Catalytic Reduction (SCR) injection system for mixing reductant with exhaust gasses. The system includes a plate disposed between walls of an entrance portion and an egress section of the exhaust pipe. The plate intercepts exhaust gasses entering the entrance section of the exhaust pipe and directs such exhaust gasses through apertures in a wall of a reductant-introducing conduit. The conduit has an outlet disposed in the egress section of the exhaust pipe. The wherein dimensions of the apertures in the wall and dimensions in the outlet of the conduit being selected to increase the velocity of the exhaust leaving the outlet of the conduit into the egress section of the exhaust pipe relative to the velocity of the exhaust gases in the entrance section. | 01-14-2010 |
| 20100205947 | S STORAGE CATALYST AND EXHAUST-GAS CONVERTING APPARATUS - An S storage catalyst | 08-19-2010 |
| 20100139259 | EXHAUST PURIFICATION DEVICE OF AN INTERNAL COMBUSTION ENGINE - In an internal combustion engine, an NO | 06-10-2010 |
| 20110214418 | COMPONENT CARRIER FOR A DOSING SYSTEM - A component carrier ( | 09-08-2011 |
| 20110214417 | EXHAUST GAS PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - Concerning an internal combustion engine equipped with an NSR catalyst and an SCR, this invention is intended to provide an exhaust gas purification system for an internal combustion engine, the system being used to suppress degradation of emissions due to blow-through of NOx. The exhaust gas purification system, used for the internal combustion engine susceptible of lean-burn operation, includes an NSR catalyst disposed in an exhaust passageway of the internal combustion engine, an SCR disposed on a downstream side relative to the NSR catalyst, and an element for executing rich-spike control at a predetermined interval during lean-burn operation. On the basis of a first rule as a relationship between the time interval and the amount of NH | 09-08-2011 |
| 20110219756 | METHOD FOR OPERATING AN EVAPORATION UNIT FOR PRODUCING GASEOUS AMMONIA AND MOTOR VEHICLE HAVING AN EVAPORATION UNIT - A method for operating an evaporation unit for converting a volume flow to an ammonia-containing gas flow includes providing the evaporator unit with at least one first section and a second section downstream of the first section. The volume flow flows through the sections for evaporation. The volume flow is heated to not more than 180° C. in the first section by supplying a first amount of heat energy and the volume flow is heated to more than 350° C. and completely evaporated in the second section. A motor vehicle having an evaporation unit is also provided. | 09-15-2011 |
| 20090151341 | APPARATUS FOR REDUCING NITROGEN OXIDE CONTAINED IN EXHAUST GAS - An apparatus for reducing NO | 06-18-2009 |
| 20100242453 | Fuel cell/engine hybrid power system - A power system has an energy conversion device and a volume expansion engine. The energy conversion device is configured to receive fuel, implement an electro-chemical process to generate an electrical output, and produce a first exhaust flow. The volume expansion engine is configured to receive the first exhaust flow, combust the first exhaust flow to generate a power output, and produce a second exhaust flow directed into the energy conversion device. | 09-30-2010 |
| 20100146950 | EXHAUST GAS PURIFICATION DEVICE - An exhaust gas purification device is provided that is capable of diffusing and introducing a reducing agent into a NO | 06-17-2010 |
| 20100242454 | NH3-MONITORING OF AN SCR CATALYTIC CONVERTER - The present invention relates to an internal combustion engine ( | 09-30-2010 |
| 20090266063 | SELECTIVE CATALYTIC REDUCTION CATALYST SYSTEM WITH EXPANDED TEMPERATURE WINDOW - According to one embodiment of the present invention a selective reduction catalyst system with a broad temperature window for lean-burn gasoline and diesel engines is disclosed. The system includes a first and second zone, wherein the first zone is composed of an iron SCR catalyst and a second zone is composed of a copper SCR catalyst, and wherein the second zone is positioned downstream of the first zone. In another embodiment, a small copper SCR catalyst is placed in front of a second zone composed of an iron SCR catalyst and a third zone composed of a copper SCR catalyst, wherein the volume of the first copper SCR catalyst is a fraction of the volume of the second copper SCR catalyst. In yet another embodiment, a diverter valve would be included in the system to eliminate any NO | 10-29-2009 |
| 20110209466 | CATALYST COMPOSITION AND CATALYTIC REDUCTION SYSTEM COMPRISING YTTRIUM - A catalyst composition, a catalytic reduction system including the catalyst composition and a system using the catalytic reduction system are provided. The catalyst composition includes a templated metal oxide substrate and a catalyst material. The templated metal oxide substrate comprises yttrium and has a plurality of pores. Yttrium is present in an amount from about 0.05 mol percent to about 3 mol percent of the substrate. The catalyst material includes a catalyst metal disposed on the templated metal oxide substrate. | 09-01-2011 |
| 20090031713 | ANTIFREEZING UREA SOLUTION FOR UREA SCR SYSTEM AND UREA SCR SYSTEM USING THE SAME - An antifreezing urea solution is disclosed which is supplied from a urea solution tank to an adding value to be injected to an SCR catalyst disposed in an exhaust passage of an internal combustion engine. The antifreezing urea solution includes a mixed solution composed of a concentrated urea solution with a urea concentration of 30 wt % or more, and an organic solvent of an alcohol family with 1 to 7 carbon atoms having a hydrophilic group, wherein the urea solution and the organic solvent of the alcohol family are mixed at a mixture ratio of 7:1 respectively (in a volume ratio) or more, providing a freezing point of −30° C. or less. | 02-05-2009 |
| 20100236225 | EXHAUST POSTTREATMENT ARRANGEMENT WITH REDUCING AGENT RESERVOIR, AND METHOD FOR POSTTREATMENT OF EXHAUST GASES - Proposed are an exhaust gas posttreatment arrangement and a method for the reduction of pollutants, in particular for the selective catalytic reduction of nitrogen oxides. The arrangement has an exhaust line for conducting the exhaust gas of an internal combustion engine to a treatment unit for the reduction of the pollutants, and at least one reservoir for storing a reducing agent for use in the treatment unit. The reservoir is arranged in the region of the exhaust line and extends parallel to the exhaust line, and is in heat-conducting contact with the exhaust line and/or with the exhaust gas in the exhaust line. | 09-23-2010 |
| 20110072806 | EXHAUST GAS PURIFICATION APPARATUS - In an exhaust gas purification apparatus ( | 03-31-2011 |
| 20110047994 | EXHAUST GAS PURIFICATION APPARATUS - An exhaust gas purification apparatus includes an exhaust gas passage, a first oxidation catalyst, a selective catalytic reduction catalyst, an oxidation-reduction catalyst and a urea water supply device. Exhaust gas is flowed through the first oxidation catalyst. The first oxidation catalyst is disposed in the exhaust gas passage. The selective catalytic reduction catalyst is disposed downstream of the first oxidation catalyst. The oxidation-reduction catalyst is disposed downstream of the selective catalytic reduction catalyst. The oxidation-reduction catalyst has reducing property and oxidizing property which are influenced by temperature, wherein the oxidizing property of the oxidation-reduction catalyst is greater than the reducing property of the oxidation-reduction catalyst under a temperature that is higher than a temperature under which the reducing property of the oxidation-reduction catalyst is greater than the oxidizing property of the oxidation-reduction catalyst. The urea water supply device supplies urea water upstream of the selective catalytic reduction catalyst. | 03-03-2011 |
| 20110047993 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an exhaust purification system of an internal combustion, comprising a NO | 03-03-2011 |
| 20080202108 | Reductant supply system for a waste gas cleaning catalyst of an internal combustion engine and a plug-in connection for connecting heatable fluid ducts - The invention relates to a reductant supply system for a waste gas cleaning catalyst ( | 08-28-2008 |
| 20100223919 | NOX REDUCTION CATALYST AND EXHAUST SYSTEM USING THE SAME - An NOx reduction catalyst and an exhaust system using the same may include an NOx reduction catalyst mounted at an exhaust pipe through which exhaust gas passes, wherein the NOx reduction catalyst includes first and second catalyst layers coated on a carrier, the first catalyst layer being disposed close to the exhaust gas, and the second catalyst layer being disposed close to the carrier, wherein a portion of nitrogen oxide contained in the exhaust gas is oxidized while passing through the first catalyst layer, and the oxidized nitrogen oxide is stored in the second catalyst layer, wherein the nitrogen oxide stored in the second catalyst layer is released through a substitution reaction with an additionally injected fuel, and wherein the released nitrogen oxide is reduced by the additionally injected fuel in the first catalyst layer. | 09-09-2010 |
| 20110185710 | EXHAUST GAS PURIFYING DEVICE FOR INTERNAL COMBUSTION ENGINE, AND SWIRL GENERATING DEVICE - An exhaust gas purifying device for an internal combustion engine, provided with a swirl generating means for generating a swirl which has a strong swirl force and applying reduced resistance to the swirl. A swirl generating device for generating a swirl which has a strong swirl force and applying reduced resistance to the swirl is also provided. An exhaust gas purifying device ( | 08-04-2011 |
| 20120144812 | DOSING MODULE FOR EXHAUST POST TREATMENT SYSTEM OF VEHICLE - A dosing module for an exhaust gas post treatment system of a vehicle, which may be used to inject a reducing agent along a flow direction of exhaust gas at a front side of a selective catalyst reduction (SCR) unit, may include a dosing main body having a connection portion that may be connected to the SCR unit and an inflow portion into which the exhaust gas flows, an injector that may be disposed at a boss portion that may be mounted on the dosing main body to inject the reducing agent into the dosing main body, and a guide member that may be disposed inside the dosing main body to guide the exhaust gas flowing into the dosing main body along a predetermined route. | 06-14-2012 |
| 20120036843 | AIR FILTER ASPIRATION AND ASPIRATION FAN DRIVE FOR USE WITH EXHAUST TREATMENT - In one embodiment, a system includes: a diesel engine having an intake and an exhaust; an exhaust treatment system communicating with the exhaust and operative to treat combustion products of the engine; an intake treatment system communicating with the intake and having an air filter assembly operative to remove particles from a flow of air and to provide the flow of air to the engine; and an aspiration fan assembly having a fan mechanically driven by the engine to produce scavenging vacuum pressure, the aspiration fan assembly being operative to apply the scavenging vacuum pressure to the air filter assembly to remove particles collected in the air filter assembly. | 02-16-2012 |
| 20120000190 | EXHAUST GAS PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - In an exhaust gas purification system for an internal combustion engine, a NO | 01-05-2012 |
| 20120204547 | EXHAUST GAS PURIFICATION CATALYST AND EXHAUST GAS PURIFICATION APPARATUS USING SAME - Disclosed are: an exhaust gas purification catalyst which is capable of achieving a higher NOx removal ratio in comparison to conventional exhaust gas purification catalysts; and an exhaust gas purification apparatus which uses the exhaust gas purification catalyst. An exhaust gas purification catalyst comprises: a first catalyst layer that contains Pt and has NOx capturing ability; a second catalyst layer that contains a zeolite that has HC capturing ability; and an intermediate layer that is provided between the first catalyst layer and the second catalyst layer and has NOx reducing ability. The intermediate layer contains, as a main component, at least one oxide selected from the group consisting of CeO | 08-16-2012 |
| 20120055143 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - An exhaust purification system is provided with an NO | 03-08-2012 |
| 20120055142 | Catalysts For Gasoline Lean Burn Engines With Improved NH3-Formation Activity - 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/in | 03-08-2012 |
| 20120055141 | Catalyst For Gasoline Lean Burn Engines With Improved NO Oxidation Activity - Described is a catalyst comprising a substrate and a catalyst coating of two or more layers: (a) a first layer comprising Pt and/or Pd on the substrate; and (b) a second layer comprising Pt 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 2.5 g/in | 03-08-2012 |
| 20120151902 | BIASED REDUCTANT MIXER - An engine exhaust aftertreatment system including a mixer with a varying contact area that assists in the introduction and conversion of a reductant introduced by an injector. | 06-21-2012 |
| 20120117954 | EXHAUST PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - An exhaust purification system for an internal combustion engine is provided that can maintain the NOx purification rate of a selective reduction catalyst at near the maximum thereof. The exhaust purification system is provided with an oxidation catalyst and CSF provided in the exhaust plumbing of the engine, a selective reduction catalyst that is provided in the exhaust plumbing on the downstream side of oxidation catalyst and CSF, and selectively reduces NOx in the exhaust, and a NO | 05-17-2012 |
| 20100287918 | NOx ADSORBING APPARATUS AND EXHAUST-GAS CONVERTING APPARATUS | 11-18-2010 |
| 20090019842 | EXHAUST PURIFICATION DEVICE FOR ENGINE - An exhaust purification device for an engine comprises a catalyst device that purifies the exhaust gas of the engine by using an additive; a venturi-shaped mixing chamber that is disposed upstream from the catalyst device and extends from a taper portion with a diameter tapering downstream to continue to a constricted portion with a minimum diameter and then to a flared portion with a diameter that is increased in the downstream direction; a swirl-generating device that is disposed in vicinity of a most upstream section of the taper portion of the mixing chamber and generates a swirling flow in the exhaust gas; and an additive-injection device that is disposed upstream from the constricted portion of the mixing chamber and downstream from the swirl-generating device, and injects the additive into the mixing chamber. | 01-22-2009 |
| 20100229542 | TEXTURIZED PURIFICATION STRUCTURE INCORPORATING AN ELECTROCHEMICAL CATALYST SYSTEM - A structure for the purification of a polluted gas comprising a porous matrix of an inorganic material, in the form of interconnected grains and an electrochemical system for the treatment of said gas, formed by a reduction catalyst A for reducing the polluting species of the NO | 09-16-2010 |
| 20110308235 | EXHAUST GAS PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - A NOx storing and reducing catalyst is disposed in an engine exhaust gas passage in which the catalyst stores NOx contained in the inflow exhaust gas when an air-fuel ratio of inflow exhaust gas is lean and releases and reduces the stored NOx when the air-fuel ratio of the inflow exhaust gas is rich. A stored NOx amount of the NOx storing and reducing catalyst is calculated and an exhaust gas purification operation is controlled based on the stored NOx amount. When the air-fuel ratio of inflow exhaust gas is lean, a ratio of NOx components in the inflow exhaust gas is calculated. An increment of the stored NOx amount per unit time is calculated based on the ratio of NOx components. | 12-22-2011 |
| 20120090304 | Multiple Flow Path Exhaust Treatment System - A vehicle exhaust system for an engine having a plurality of combustion chambers includes a first emission treatment device, a second emission treatment device and a housing defining a first exhaust passageway in fluid communication with the combustion chambers and containing the first emission treatment device. A second parallel exhaust passageway is in fluid communication with the combustion chambers and contains the second emission treatment device. The first and second passageways share a common wall having a serpentine shape such that the cross-sectional area of the passageways varies along a direction of exhaust flow. The first emission treatment device is positioned at a location of increased cross-sectional area in the first passageway and the second emission treatment device is positioned at an axially offset location of increased cross-sectional area in the second passageway. | 04-19-2012 |
| 20110146252 | CANISTER AFTERTREATMENT MODULE - An aftertreatment module for use with an engine is disclosed. The aftertreatment module may have a canister, and a wall disposed within the canister and axially-dividing the canister into a first portion and a second portion. The aftertreatment module may also have a first treatment device disposed within the first portion, an inlet connected to the first portion, a second treatment device disposed within the second portion, an outlet connected to the second portion, and an external tube extending from the first portion to the second portion. | 06-23-2011 |
