Matches 1 - 50 out of 352 1 2 3 4 5 6 7 8 >


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US20060168950 Combination emission abatement assembly and method of operarting the same  
A combination emission abatement assembly includes a first emission device such as a NOX trap and a second emission abatement device such as a soot particulate filter. Reformate gas from a fuel...
US20090107120 METHOD AND DEVICE FOR TREATING THE EXHAUST GAS OF AN INTERNAL COMBUSTION ENGINE  
A device for treating exhaust gas of an internal combustion engine includes a reducing agent solution evaporator, a hydrolysis catalytic converter connected thereto for hydrolysis of urea to form...
US20050000210 Method and apparatus for desulfurizing a NOx trap  
An emission abatement system comprises a plurality of NOX traps positioned in a parallel flow arrangement, a desulfurization agent supplier for supplying a desulfurization agent, a valve...
US20100290963 TRANSITION METAL / ZEOLITE SCR CATALYSTS  
A method of converting nitrogen oxides in a gas to nitrogen by contacting the nitrogen oxides with a nitrogenous reducing agent in the presence of a zeolite catalyst containing at least one...
US20050066652 Diesel aftertreatment systems  
A method for improving NOx conversion efficiency of a Nox-reducing catalyst by determining an accurate amount of reductant required is presented. The method includes calculating an initial...
US20050252197 Diesel aftertreatment systems  
An accurate thermodynamic model of an Active Lean NOx (ALNC) Catalyst is presented. The model takes into account hydrocarbon storage and release mechanisms of the ALNC, as well as the degradation...
US20050262832 Exhaust gas purification device of internal combustion engine  
A catalyst (22) suitable for reduction of the NOx in an exhaust gas by ammonia in the presence of excess oxygen is arranged in the exhaust passage (18, 21) of an internal combustion engine. An...
US20050204729 Exhaust gas purification device of internal combustion engine  
A catalyst (22) suitable for reduction of the NOx in an exhaust gas by ammonia in the presence of excess oxygen is arranged in the exhaust passage (18, 21) of an internal combustion engine. An...
US20060080953 Method for regenerating a particle trap and exhaust system  
An exhaust system purifies a gas flow of harmful substances. The exhaust system contains at least device for supplying a reducing agent, a first catalytic converter, and a particle trap, in the...
US20060075744 Apparatus and method for regenerating a particulate filter of an exhaust system of an internal combustion engine  
A power system has a fuel reformer, an emission abatement device, and a fuel cell. The fuel reformer reforms hydrocarbon fuels so as to produce a reformate gas which is supplied to both the...
US20080236146 Method And Apparatus For Regenerating NOx Adsorbers  
In a method of regenerating a NOx adsorber, the NOx adsorber is used to treat exhaust gases created during the combustion of gaseous fuels in general. Methane is introduced into a reformer or...
US20060196172 Injection device for the treatment of exhaust fumes from motor vehicles  
A device for injecting at intermittent periods a dispersion of a liquid at controlled pulsing periods into exhaust fumes of a combustion engine, said liquid contains a component which reacts with...
US20060130462 Process for the catalytic NOx reduction of a thermal engine, and device for said purpose  
In a process for the catalytic NOx reduction in oxygen-containing exhaust gases of a thermal engine in one or several reduction catalytic converters, hydrocarbons of the fuel of the thermal engine...
US20050252202 Integrated apparatus for removing pollutants from a fluid stream in a lean-burn environment with heat recovery  
An apparatus and method to treat fluid streams, and in particular emissions from lean-burn engines such as diesel engines, are disclosed, which use multiple catalysts chosen to remove...
US20050005596 High efficiency conversion of nitrogen oxides in an exhaust aftertreatment device at low temperature  
A system and method for providing reductant to a lean NOx catalyst, when the temperature in the lean NOx catalyst is greater than 300° C., is disclosed. After the reductant is supplied under these...
US20110232267 METHOD AND DEVICE FOR THE ADDITION IN DROPLET FORM OF A LIQUID REDUCING AGENT INTO AN EXHAUST GAS LINE  
A method and a device for the addition in droplet form of a liquid reducing agent to an exhaust gas line of an internal combustion engine, particularly to a rear end side of an exhaust gas...
US20110283685 Exhaust Treatment System With Hydrocarbon Lean NOx Catalyst  
A system for treating an exhaust stream from an engine includes a main exhaust passageway adapted to receive the exhaust stream from the engine. A side branch is in communication with the main...
US20070266697 Exhaust emission purifying apparatus for engine  
A technology for purifying an exhaust emission from an engine is provided, in which a misjudgment caused by a time lag between the abnormality detection and an abnormality judgment is avoided, in...
US20070033927 Automotive diesel exhaust HC dosing valve  
A dosing valve assembly is disclosed for administering a reducing agent into an exhaust stream within an exhaust manifold of an internal combustion engine. The dosing valve assembly comprises a...
US20110146246 REGENERATION ASSIST TRANSITION PERIOD  
A power system comprising an engine that produces exhaust, a particulate filter that traps soot from the engine, and a controller that switches the power system from a first operation mode into a...
US20070119153 Superheated urea injection for aftertreatment applications  
An urea SCR system for enhancing internal combustion engine aftertreatment applications includes a supply tank containing aqueous urea, a delivery pump operatively connected to the supply tank and...
US20070012032 Hybrid system comprising HC-SCR, NOx-trapping, and NH3-SCR for exhaust emission reduction  
An exhaust aftertreatment system is provided with a first SCR catalyst, a NOx adsorber-catalyst, and an ammonia-SCR catalyst. The first catalyst is generally a hydrocarbon-SCR catalyst, but can be...
US20080060348 Emissions reduction system  
An engine, an exhaust system, and a method for reducing NOx in an exhaust stream are provided. The system comprises a first SCR catalyst, a second SCR catalyst, and a particulate filter positioned...
US20050274107 Reforming unvaporized, atomized hydrocarbon fuel  
A reformer such as a CPO (18) receives a mix of fuel, moisture and oxygen from a mixing region (21) having an igniter (26, 66), which may include an inert ceramic foam (19), the fuel being...
US20070079602 Thermal management of hybrid LNT/SCR aftertreatment during desulfation  
In an exhaust aftertreatment system comprising a NOx adsorber-catalyst followed by an SCR catalyst, means are provided for preventing the SCR catalyst from becoming heated to near the same peak...
US20060086080 Engine exhaust gas cleaning method and system  
An engine exhaust gas cleaning method and system, which can effectively reduce emission amounts of particular components, such as NOx, contained in exhaust gas by adding an additive, such as urea...
US20060053776 Management of thermal fluctuations in lean NOx adsorber aftertreatment systems  
A method and apparatus manage heat in exhaust gas in an aftertreatment system that employs a lean NOx adsorber. A de-sulfation hot line and cooling line are employed to control exhaust gas...
US20050223699 Bypass controlled regeneration of NOx adsorbers  
In a method and apparatus for regenerating a lean NOx adsorber, the NOx adsorber treats exhaust gases created during the combustion of gaseous fuels in general. A bypass line maintains a target...
US20070209349 Method And Device For Introducing A Reagent Into An Exhaust Gas Channel Of An Internal Combustion Engine  
A procedure to introduce a reagent substance into the exhaust duct of an internal combustion engine and a device to implement the procedure are proposed. At least one catalytic converter is...
US20050274108 Device for supplying ammonia to a reduction catalyst arranged in an exhaust system of an internal combustion engine  
In a device for supplying ammonia (NH3) to a reduction catalytic converter arranged in an exhaust system of an internal combustion engine comprising a container for storing a precursor body...
US20050274104 Optimum regeneration of diesel particulate filters and NOx traps using fuel reformers  
Pollution control apparatus. An exhaust aftertreatment unit is fitted to the exhaust of an internal combustion engine and a fuel reformer provides hydrogen rich gas in an optimal way to the...
US20110061374 EXHAUST GAS TREATMENT SYSTEM  
An exhaust gas treatment system includes an exhaust passage through which exhaust gas from an internal combustion engine is allowed to flow, a selective catalytic reduction catalyst provided in...
US20080314027 Exhaust Gas Treatment  
A device 1, capable of being placed in-line in the exhaust conduit of an IC engine upstream of an SCR catalyst, which produces a gaseous hydrolysis product, containing ammonia, which is added to...
US20070144152 Procedure and control unit to operate an integrated SCR/DPF system  
A procedure is introduced to operate a particle filter, which is disposed in the exhaust gas stream of an internal combustion engine and which collects particles from the exhaust gas and possesses...
US20080053071 System and Method for Reducing NOx Emissions  
An exhaust system, comprising of a first emission control system in the exhaust system, said emission control system having a at least a first region and a second region, said second region...
US20060248881 System for Injecting Fuel into Diesel Engine Exhaust Pipe  
Disclosed is a system for injecting fuel into a diesel engine exhaust pipe that prevents injected fuel from adhering to an exhaust pipe inner wall, adequately reduces and regenerates an exhaust...
US20110067382 SYSTEM AND METHOD FOR NOX REDUCTION OPTIMIZATION  
An engine controller determines the cost of operating a combustion engine and the cost of operating an emissions after-treatment device. Accordingly, the engine controller adjusts parameters for...
US20090013670 Reservoir for a fluid dosing system  
A reservoir for holding a fluid for supply to a fluid dosing device for introducing the fluid into a gas flow, the reservoir comprising: an outer container; an inner container located within the...
US20080295498 EXHAUST GAS PURIFYING APPARATUS FOR INTERNATIONAL COMBUSTION  
An exhaust gas purifying apparatus for an internal combustion engine including an ammonia generating device and a NOx removing device. The ammonia generating device is provided in an exhaust...
US20080282682 Integrated DPF loading and failure sensor  
An integrated DPF loading and failure sensor with two particulate matter sensors one located upstream of the filter and the other located downstream of the filter. The sensors are integrated into...
US20060201139 Emission abatement systems and methods  
An emission abatement assembly includes a fuel reformer which supplies reformate gas to a catalyst. Exhaust gas from an internal combustion engine is advanced through the catalyst and into a...
US20130213008 METHOD AND SYSTEM FOR IMPROVING THE ROBUSTNESS OF AFTERTREATMENT SYSTEMS  
A method for treating a catalyst in an internal combustion engine is disclosed. The method comprises detecting the efficiency of a catalyst; sending the catalyst efficiency to a threshold monitor;...
US20110030350 EXHAUST GAS PURIFYING APPARATUS  
An exhaust gas purification apparatus includes an oxidation catalyst provided in a passage through which exhaust gas flows, a urea decomposition accelerator, a selective catalytic reduction...
US20100186382 Emissions system mounting device with reductant mixing  
An emissions control system is disclosed. The emissions control system may have a first exhaust treatment device. The emissions control system may also have an end cap defining a mixing chamber...
US20090293460 ENGINE EXHAUST EMISSION PURIFICATION APPARATUS  
An engine exhaust emission purification apparatus for reducing and purifying NOx in the exhaust emission by using a liquid reducing agent having a temperature maintenance device for maintaining a...
US20050247050 Adsorption based ammonia storage and regeneration system  
One aspect of the invention relates to a device for storing ammonia for use in SCR on board a vehicle. The device comprises an adsorption bed with a high capacity for storing ammonia. The device...
US20100050604 SCR-LNT CATALYST COMBINATION FOR IMPROVED NOx CONTROL OF LEAN GASOLINE AND DIESEL ENGINES  
An aftertreatment system for use in a lean burn engine is disclosed. In one embodiment, the aftertreatment system includes a first catalyst in communication with an exhaust stream from the engine;...
US20080202101 Exhaust treatment system  
An exhaust gas treatment system of an internal combustion engine includes a selective catalytic reduction catalyst fluidly connected to the internal combustion engine, a particulate filter fluidly...
US20070277509 Exhaust gas purification system and method of purifying exhaust gas  
Decreases in the volume of intake air to an engine in response to environmental changes results in an increase in amount of PM emissions. In view of this situation, a correction coefficient of...
US20070175206 NOx adsorber aftertreatment system for internal combustion engines  
The present invention provides for an NOx adsorber aftertreatment system for internal combustion engines which utilizes a parallel arrangement of an adsorber catalyst and a bypass. The exhaust...

Matches 1 - 50 out of 352 1 2 3 4 5 6 7 8 >