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Internal combustion engine with exhaust-gas aftertreatment arrangement and method for operating an internal combustion…

Internal combustion engine with exhaust-gas aftertreatment arrangement and intake air arrangement and method for…

Date/App# patent app List of recent Reductant-related patents
08/21/14
20140231930
 Atomic layer deposition of hafnium or zirconium alloy films patent thumbnailnew patent Atomic layer deposition of hafnium or zirconium alloy films
Provided are methods of depositing hafnium or zirconium containing metal alloy films. Certain methods comprise sequentially exposing a substrate surface to alternating flows of an organometallic precursor and a reductant comprising m(bh4)4 to produce a metal alloy film on the substrate surface, wherein m is selected from hafnium and zirconium, and the organometallic precursor contains a metal n.
08/21/14
20140230433
 Internal combustion engine with exhaust-gas aftertreatment arrangement and method for operating an internal combustion engine of said type patent thumbnailnew patent Internal combustion engine with exhaust-gas aftertreatment arrangement and method for operating an internal combustion engine of said type
A system and method for controlling temperature of a urea reductant to form ammonia for nox reduction in a selective catalytic reducer coupled to a turbocharged engine exhaust by portioning a flow across the reductant between compressed air and ambient air.. .
08/21/14
20140230410
 Internal combustion engine with exhaust-gas aftertreatment arrangement and intake air arrangement and method for operating an internal combustion engine of said type patent thumbnailnew patent Internal combustion engine with exhaust-gas aftertreatment arrangement and intake air arrangement and method for operating an internal combustion engine of said type
A system and method for controlling temperature of a urea reductant to form ammonia for nox reduction in a selective catalytic reducer coupled to a turbocharged engine exhaust by portioning a flow across the reductant of one or more of the following: a combination of compressed air and ambient air; and/or a combination of the exhaust upstream and downstream the turbine.. .
08/14/14
20140223902
 Internal combustion engine with selective catalytic converter for the reduction of nitrogen oxides and method for operating an internal combustion engine of said type patent thumbnailInternal combustion engine with selective catalytic converter for the reduction of nitrogen oxides and method for operating an internal combustion engine of said type
An internal combustion engine comprising a turbocharger wherein a bypass line in an exhaust gas discharge system delivers an aqueous urea reductant to an at least one scr catalyst and a method to maintain the reductant at a desired temperature to maximize its conversion to ammonia and optimize the reduction of nox in the scr.. .
07/31/14
20140212754
 Battery patent thumbnailBattery
Provided is a battery having a high charging/discharging capacity density as compared with a conventional one. The battery (1) is characterized by comprising a positive electrode (2), a negative electrode (3), and an electrolytic solution interposed between the positive electrode (2) and the negative electrode (3) and formed by dissolving an electrolytic solution in a solvent, wherein the positive electrode (2) includes rubeanic acid or a rubeanic acid derivative as an active material and the solvent includes an ionic liquid.
07/24/14
20140206922
 Methods for dissolution and instant neutralization of solid nitrocellulose propellants and plasticized military munitions patent thumbnailMethods for dissolution and instant neutralization of solid nitrocellulose propellants and plasticized military munitions
Nitrocellulose propellants and plasticized military munitions, equipment, or contaminated soil are placed in a suitable container. A first option consists of adding a strong base to plasticized munitions in a container or militarization/demilitarization equipment or soil containing plasticized munitions or nitrocellulose propellant; adding an organic solvent; and then adding water to mixture.
07/17/14
20140199603
 Biological fuel cell and methods patent thumbnailBiological fuel cell and methods
A fuel cell has an anode and a cathode with anode enzyme disposed on the anode and cathode enzyme is disposed on the cathode. The anode is configured and arranged to electrooxidize an anode reductant in the presence of the anode enzyme.
07/17/14
20140196444
 Reductant aqueous solution mixing device and exhaust aftertreatment device provided with the same patent thumbnailReductant aqueous solution mixing device and exhaust aftertreatment device provided with the same
A mixing device of an exhaust aftertreatment device includes: an elbow pipe attached to an outlet pipe of a filter device; a straight pipe connected to a downstream side of the elbow pipe to extend in a direction intersecting an axial line of the outlet pipe; and an injector attached to the elbow pipe, the injector injecting a reductant aqueous solution into inside the elbow pipe toward the straight pipe. The elbow pipe includes: an inlet connected with the outlet pipe; an outlet connected with the straight pipe; a direction-changing section provided between the inlet and the outlet; and an injector attachment provided outside the direction-changing section and attached with the injector.
07/17/14
20140196442
 Reductant aqueous solution mixing device and exhaust aftertreatment device provided with the same patent thumbnailReductant aqueous solution mixing device and exhaust aftertreatment device provided with the same
A mixing device includes: an elbow pipe attached to an outlet pipe of a filter device; a straight pipe connected to a downstream side of the elbow pipe; and an injector attached to the elbow pipe and injecting a reductant aqueous solution into an inside of the elbow pipe toward the straight pipe. The elbow pipe is provided with an injector attachment to which the injector is attached with a bolt.
07/17/14
20140196441
 Reductant aqueous solution mixing device and exhaust aftertreatment device provided with the same patent thumbnailReductant aqueous solution mixing device and exhaust aftertreatment device provided with the same
A mixing device includes: an elbow pipe attached to an outlet pipe of a filter device, the elbow pipe changing a flow direction of an exhaust gas flowing from the filter device; a straight pipe connected to a downstream side of the elbow pipe, the straight pipe extending in a direction intersecting an axial line of the outlet pipe; an injector attached to the elbow pipe and injecting a reductant aqueous solution inside the elbow pipe toward the straight pipe; and a mixing pipe disposed in the elbow pipe to serve as a cover for the reductant aqueous solution, the mixing pipe being provided with openings on a circumferential wall thereof. A plurality of large openings are provided on a circumferential wall of the mixing pipe near the injector and a plurality of small openings are provided on a circumferential wall of the mixing pipe near the straight pipe..
07/17/14
20140196440
Reductant aqueous solution mixing device and exhaust aftertreatment device provided with the same
A mixing device includes: an elbow pipe attached to an outlet pipe of a filter device, the elbow pipe changing a flow direction of an exhaust gas flowing from the filter device; a straight pipe connected to a downstream side of the elbow pipe, the straight pipe extending in a direction intersecting an axial line of the outlet pipe; an injector attached to the elbow pipe and injecting a reductant aqueous solution inside the elbow pipe toward the straight pipe; and a mixing pipe disposed in the elbow pipe to serve as a cover for the reductant aqueous solution, the mixing pipe being provided with openings on a circumferential wall thereof. A cutout is provided at a fixing portion of the mixing pipe with the elbow pipe at a position for allowing the exhaust gas entering through an inlet of the elbow pipe to flow toward the injection nozzle..
07/10/14
20140193318
Reductant decomposition system
Described herein are various embodiments of a reductant decomposition system. According to one representative embodiment, the reductant decomposition system includes an exhaust gas chamber including an inlet and outlet.
06/26/14
20140174696
Injector cooling apparatus and method
A system for cooling a reductant injector in an emissions module is provided. The system includes an emissions module, coupled to an engine exhaust duct, and a cooling system fluidly coupled to the emissions module.
06/19/14
20140170513
Anode protection system for shutdown of solid oxide fuel cell system
An anode protection systems for a sofc system, having a reductant supply and safety subsystem, a sofc anode protection subsystem, and a post combustion and slip stream control subsystem. The reductant supply and safety subsystem includes means for generating a reducing gas or vapor to prevent re-oxidation of the ni in the anode layer during the course of shut down of the sofc stack.
06/19/14
20140166141
Reductant injection system with control valve
An exhaust system including an exhaust flow path, an exhaust treatment fluid tank, and a dosing module in communication with the exhaust treatment fluid tank. A three-way valve communicates with the dosing module.
06/19/14
20140166126
Reductant delivery system
Disclosed is a reductant delivery system comprising a reductant tank, a reductant delivery mechanism, a reductant pressure source, and an extraction passage. The extraction passage is coupled fluidly to the reductant tank and the reductant pressure source therebetween.
06/19/14
20140165540
Aftertreatment system incorporating hydrolysis catalyst with particulate filtration and scr
An aftertreatment system is disclosed. The aftertreatment system can include a hydrolysis catalyst disposed within a first canister adjacent to a downstream end of the first canister and a nozzle positioned to inject reductant into the first canister upstream of the hydrolysis catalyst.
06/12/14
20140161718
Synthesis of cu/sapo-34 with variable copper loadings
A cu-amine complex of hydrated copper sulfate and ethylene diamine or an oligomer of ethylene diamine is employed in a direct (one-pot) synthesis of a copper-cation containing silicoaluminophosphate (sapo) zeolite material having the cu/sapo-34 structure. The copper-amine complex is included in an aqueous gel of precursors of the sio2, al2o3, and p2o5 constituents, which are mixed, aged, and thermally treated to form the desired cu/sapo-34 structure.
06/12/14
20140157758
After-treatment system and method for six-stroke combustion cycle
A method and system of operating an internal combustion engine on a six-stroke cycle utilizes an after-treatment system to reduce emissions such as nitrogen oxides. The method and system introduce a first fuel charge to a combustion chamber and combusts the first fuel charge to produce a first stoichiometric lean condition.
06/05/14
20140150411
Reductant injection control system
An exhaust system including a plurality of exhaust treatment devices, plurality of injectors for dosing an exhaust treatment fluid into an exhaust stream, and a controller for controlling each of the plurality of injectors. The controller actively controls an amount of exhaust treatment fluid dosed into the exhaust stream by each of the plurality of injectors based on at least one of an exhaust flow rate and a temperature of the exhaust stream..
06/05/14
20140150409
Method, apparatus, and system to control selective catalytic reduction (scr) catalyst ammonia slip during high temperature transitions
Method, apparatus, and system to control ammonia slip in a selective catalytic reduction (scr) system. The method includes detecting an engine operation transition event, increasing nox to the scr catalyst, and decreasing a reductant dose.
05/22/14
20140140022
Electronic device, electronic component, and method of manufacturing circuit board assembly
According to one embodiment, an electronic device includes a housing, a circuit board, an electronic component, a joint, a sealant, and a positioning member. The circuit board is provided in the housing, and includes a first surface and a first conductor on the first surface.
05/22/14
20140138568
Purging and sealing - reductant delivery unit for selective catalytic reduction systems
A sealing device which is used as part of an injector in a reductant delivery unit (rdu), where the rdu is part of a selective catalytic reduction (scr) system for injecting diesel exhaust fluid (def) into an exhaust system, used for controlling exhaust emissions. This invention improves the purging efficiency of the rdu, in addition to improving the sealing performance of the unit by reducing the fluid volume to be evacuated from the injector, and provides an additional sealing barrier to reduce the sealing load of the existing sealing elements.
05/22/14
20140137543
Reductant delivery unit for scr systems having improved deposit resistance
A reductant delivery unit for selective catalytic reduction (scr) after-treatment for vehicles includes a fluid injector having a fluid inlet and a fluid outlet. The fluid inlet receives a source of urea solution.
05/15/14
20140134514
Fuel cell
Provided is a fuel cell as a fired body including a porous plate-like support substrate having a gas flow path formed therein, and a power generation element part provided on a principal surface of the support substrate, the power generation element part including at least a fuel electrode, a solid electrolyte, and an air electrode laminated in this order. The generation of cracks in the support substrate has a strong correlation with a “surface roughness of a wall surface of a gas flow” of the fuel cell in a state of a reductant.
05/08/14
20140127098
Ammonia slip reduction
A method for controlling injection of a reductant into an exhaust system of an internal combustion engine, which includes measuring temperature at a plurality of locations in the exhaust system relative to an scr catalyst, determining an average temperature as a function of the measured temperatures, and controlling injecting of a reductant into the exhaust upstream of the catalyst as a function of the average temperature. The average temperature may be a weighted average where temperature measurements from at least some locations upstream of the scr catalyst may be assigned greater weight than temperature measurements proximate the scr catalyst..
05/08/14
20140127097
Ammonia flow control
A method for controlling injection of a reductant into an exhaust system of an internal combustion engine includes determining the temperature and pressure of reductant supplied to a reductant injector. The method also determines a maximum reductant flow rate as a function of the reductant temperature and pressure and controls operation of the injector as a function of the maximum reductant flow rate..
05/08/14
20140124284
Construction vehicle equipped with exhaust aftertreatment device
A construction vehicle adapted to travel using a wheel and equipped with an exhaust aftertreatment device to which a reductant is supplied is provided. At least a portion of the exhaust aftertreatment device including a front end thereof is located on a fender provided for the wheel.
05/01/14
20140119998
Method for producing sodium tungstate, method for collecting tungsten, apparatus for producing sodium tungstate, and method for producing sodium tungstate aqueous solution
Provided are a method for producing sodium tungstate by supplying an oxidant made of sodium nitrate or sodium nitrite to bring a tungsten containing material and the oxidant into contact with each other in an atmosphere containing oxygen to thereby continuously produce a reaction product; a method for collecting tungsten using the method; and an apparatus for producing sodium tungstate. Also provided are a method for producing a sodium tungstate aqueous solution in which a reductant is introduced into a melt containing the above-described reaction product which is then dissolved in water; and a method for collecting tungsten using the method..
05/01/14
20140116879
Method for measuring hematocrit value of blood sample, method for measuring concentration of analyte in blood sample, sensor chip and sensor unit
Provided is a sensor chip for electrochemically measuring a concentration of an analyte in a blood sample. In one embodiment of the sensor, the sensor chip includes a substrate, and a preliminary measurement analyzer and a hematocrit value analyzer disposed on the substrate.
05/01/14
20140116027
Multi-leg aftertreatment system
An apparatus is disclosed, including an exhaust conditions module structured to interpret a diesel particulate filter (dpf) delta pressure value, a flow balance correlation, a nox input value, and an exhaust flow rate value. A flow determination module is structured to determine a flow imbalance value in response to the dpf delta pressure value, the flow balance correlation, and the exhaust flow rate value.
04/24/14
20140112853
Mixed metal 8-ring small pore molecular sieve catalyst compositions, catalytic articles, systems, and methods
Described are compositions and catalytic articles comprising a copper-promoted 8-ring small pore molecular sieve and an iron-promoted 8-ring small pore molecular sieve. The catalytic articles are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant..
04/24/14
20140112852
8-ring small pore molecular sieve with promoter to improve low temperature performance
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.
04/24/14
20140112851
Supplemental ammonia storage and delivery system
An exhaust after-treatment system is described. Generally speaking, the system includes separate primary and secondary nox reducing systems for delivering reductant (e.g.
04/24/14
20140112847
Method for producing sodium tungstate, method for collecting tungsten, apparatus for producing sodium tungstate, and method for producing sodium tungstate aqueous solution
Provided are a method for producing sodium tungstate by supplying an oxidant made of sodium nitrate or sodium nitrite to bring a tungsten containing material and the oxidant into contact with each other in an atmosphere containing oxygen to thereby continuously produce a reaction product; a method for collecting tungsten using the method; and an apparatus for producing sodium tungstate. Also provided are a method for producing a sodium tungstate aqueous solution in which a reductant is introduced into a melt containing the above-described reaction product which is then dissolved in water; and a method for collecting tungsten using the method..
04/17/14
20140105798
Exhaust gas aftertreatment system and method for exhaust gas aftertreatment
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.
04/10/14
20140099513
Preparation method of silver nano-structure for surface enhanced, raman scattering substrate and silver nano-structure thereby
A preparation method of silver nanostructure for use as substrate of surface-enhanced raman scattering (sers), which can ensure the ‘hot spot’, which provides the considerably very intense electromagnetic field in which the silver nano-structures have uniform average size and very strong forms of particles, by characterizing a variety of conditions such as, for example, concentration of agno3 and reductant, reaction temperature, stirring velocity, single dropwise addition quantity, dropwise addition rate, or total dropwise addition quantity, which were unpredictable in the conventional silver nanoparticle preparation method using agno3 aqueous solution and nabh4 reductant, so that the preparation method can be advantageously applied for the mass production of silver nano-structures for use as substrate of sers because the method can provide multimer form with enhanced sers signals and reproducibility, and also ability to selectively control the particle size.. .
04/03/14
20140093439
Flow device for an exhaust system
A flow device for an exhaust system includes a body that defines an interior cavity. An exhaust inlet passage is disposed in the interior cavity.
03/06/14
20140061549
Manufacturing and applications of metal powders and alloys
Disclosed is a process to reduce mixtures of at least one metal halide by molten metal reduction of the liquid phase metal halide in an alkali or alkaline earth metal to form a reaction product comprising at least one metal mixture and a halide salt coating, in which the at least one metal halide is in stoichiometric excess to the molten metal reductant and wherein the reductant is consumed in the reaction and does not need to be removed at the end of the reaction.. .
03/06/14
20140060040
Secondary air introduction system
Embodiments for heating an emission control device are provided. In one example, a method for a turbocharged engine comprises during an engine cold-start, delivering boosted air from downstream of a compressor into a wastegate duct coupled across a turbine and exothermically reacting a reductant with the boosted air upstream of an exhaust emission control device.
03/06/14
20140060007
Apparatus and method for onboard performance monitoring of oxidation catalyst
An exhaust treatment system is disclosed that can diagnose the performance of an exhaust treatment oxidation catalyst in converting no to no2. The exhaust treatment system is fluidly coupled to an internal combustion engine, and includes an oxidation catalyst disposed in an engine exhaust stream; a reductant source for injecting a reductant into the exhaust stream downstream of the oxidation catalyst; an scr catalyst disposed in the exhaust stream downstream of the reductant source; and a gas sensor, disposed in the exhaust stream downstream of the oxidation catalyst and upstream of the reductant source, comprising a plurality of sensing or pumping cells that measures no concentration in the exhaust gas and no2 concentration in the exhaust gas..
02/27/14
20140056788
Method for the model-based feedback control of an scr system having at least one scr catalytic converter
A method for a model-based feedback control of an scr system having at least one scr catalytic converter. An scr catalytic converter model of the scr catalytic converter is used to control an injection of a reductant upstream of the scr catalytic converter.
02/27/14
20140054394
Reductant delivery unit for automotive selective catalytic reduction systems - active cooling
A reductant delivery unit (rdu) delivers supplied reductant (aqueous urea solution) to the engine exhaust system. The delivered reductant is transformed into ammonia which then reacts with the exhaust oxides of nitrogen in a catalytic environment to produce nitrogen and h20.
02/27/14
20140053538
Reductant injection and mixing system
A gaseous reductant injection and mixing system is described herein. The system includes an injector for injecting a gaseous reductant into an exhaust gas stream, and a mixer attached to a surface of the injector.
02/27/14
20140053537
Air driven reductant delivery system
A dosing system for delivering reductant to an exhaust gas treatment system of an internal combustion engine using air driven hydraulic pumps for closed-loop controlling reductant pressure and a two-stage pwm control method for controlling dosing rate. Reductant residue in the dosing systems is purged by using compressed air after a dosing process completes, and when the air driven hydraulic pumps are positioned inside a reductant tank, dedicated heating means for the pumps is not necessary.
02/20/14
20140050608
Methods for reducing impurities in magnesium, purified magnesium, and zirconium metal production
A method for reducing impurities in magnesium comprises: combining a zirconium-containing material with a molten low-impurity magnesium including no more than 1.0 weight percent of total impurities in a vessel to provide a mixture; holding the mixture in a molten state for a period of time sufficient to allow at least a portion of the zirconium-containing material to react with at least a portion of the impurities and form intermetallic compounds; and separating at least a portion of the molten magnesium in the mixture from at least a portion of the intermetallic compounds to provide a purified magnesium including greater than 1000 ppm zirconium. A purified magnesium including at least 1000 ppm zirconium and methods for producing zirconium metal using magnesium reductant also are disclosed..
02/13/14
20140044633
Catalytic reduction of nox with high activity catalysts with propylene reductant
Methods and systems are provided for selective catalytic reduction of nox with a low molecular low molecular weight hydrocarbon, e.g., propylene, as a reductant using a catalyst system including two catalysts. An exhaust stream containing an amount of nox from a combustion operation is provided.
02/13/14
20140041364
Catalytic reduction of nox with high activity catalysts with nh3 reductant
Methods and systems for selective catalytic reduction of nox with an ammonia reductant and a zeolite catalyst loaded with at least two metals selected from the group of tungsten, cobalt, and vanadium. An exhaust stream including nox and a reductant stream including ammonia are provided to a catalytic reactor having the metal loaded zeolite catalyst at suitable operating temperatures for nox reduction of at least 90%..
02/13/14
20140041363
Catalytic reduction of nox with high activity catalysts with acetaldehyde reductant
Methods and systems are provided for selective catalytic reduction of nox with a low molecular low molecular weight aldehyde, e.g., acetaldehyde, as a reductant using a catalyst system including two catalysts. An exhaust stream containing an amount of no from a combustion operation is provided.
02/06/14
20140033685
Exhaust system having ammonia slip catalyst and egr circuit
An exhaust system for a vehicular lean burn internal combustion engine that emits oxides of nitrogen (nox) and particulate matter (pm) is disclosed. The system comprises a nox reduction catalyst for reducing nox in the presence of a nitrogenous reductant, means for introducing the nitrogenous reductant into a flowing exhaust gas, a filter for removing pm from exhaust gas flowing in the exhaust system and a low pressure exhaust gas recirculation (egr) circuit for connecting the exhaust system downstream of the filter to an air intake of the engine.
02/06/14
20140033683
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.
01/30/14
20140031554
Process for preparing racemic nicotine
Provided is a process for preparing racemic nicotine from 1-methyl-3-nicotinoyl-2-pyrrolidone or a salt thereof using one-pot process. The process comprises the following steps: 1) in a reaction vessel, reacting 1-methyl-3-nicotinoyl-2-pyrrolidone or a salt thereof in the presence of a suitable solvent and a strong acid by heat; after the reaction is complete, cooling the same and adjusting the ph to 7-8 with alkali; and 2) directly adding a reductant into the above vessel, and after the reaction, purifying the product so as to obtain high purity racemic nicotine or a salt thereof..
01/30/14
20140027301
Selective reductive electrowinning apparatus and method
A method and electrochemical cell for recovery of metals is provided, where the electrochemical cell includes an anode disposed in an anodic chamber, a cathode disposed in a cathodic chamber, an ion-conducting separator disposed between the anode and the cathode to physically separate the anodic and cathodic chambers, a basic ph anolyte containing a sacrificial reductant disposed within the anodic chamber, an acidic ph catholyte containing metal ions disposed within the cathodic chamber, and an electrical connection between the anode and the cathode. The method includes applying a voltage or an electrical current to an electrolytic cell across the cathode and the anode and is sufficient to reduce the metal ions to form an elemental metal species at the cathode, and to oxidize the sacrificial reductant at the anode..
01/02/14
20140000719
Reductant refill and purging system
A system for refilling a reductant tank of a first machine is provided. The system includes a reductant reservoir, a first valve, and a pump.
01/02/14
20140000242
Methods and systems for emission system control
Methods and systems are provided for controlling an engine in a vehicle, the engine having a turbocharger, and a particulate filter upstream of a turbocharger turbine. In one example, the method comprises, under selected boosted operating conditions, injecting a reductant upstream of the filter during an exhaust stroke to generate an exothermic reaction at the filter..
12/26/13
20130343959
Common rail reductant injection system
An exhaust system including a selective catalytic reduction (scr) component and an oxidation catalyst component. The exhaust system also includes an exhaust treatment fluid injection system for dispersing an exhaust treatment fluid into an exhaust stream at a location adjacent either the scr component or the oxidation catalyst component, wherein the exhaust treatment fluid injection device includes a common rail that provides the exhaust treatment fluid under pressure to a plurality of injectors that dose the exhaust treatment fluid into the exhaust stream.
12/26/13
20130340413
Exhaust system including nox reduction catalyst and egr circuit
An exhaust system for a vehicular lean burn internal combustion engine that emits oxides of nitrogen (nox) and particulate matter (pm) is disclosed. The system comprises a nox reduction catalyst for reducing nox in the presence of a reductant, means for introducing reductant into a flowing exhaust gas and a source of hydrocarbon reductant, a nitrogenous reductant, and/or hydrogen, a filter for removing pm from exhaust gas flowing in the exhaust system and a low pressure exhaust gas recirculation (egr) circuit for connecting the exhaust system downstream of the filter to an air intake of the engine.
12/19/13
20130336862
Variable exhaust gas aftertreatment system
Systems and method for adjusting a cone angle of injected reductant directed into an engine exhaust upstream of a catalytic device based on the temperature distribution within the catalytic device are disclosed. In one particular example, a dosing unit comprising an adjustable piston is described whose adjustment further controls the distribution and amount of reaction fluid delivered therefrom.
12/19/13
20130333363
Reductant decomposition and mixing system
A selective catalytic reduction (scr) system includes a mixer that has a plurality of blades spaced about a central tube. The mixer can be configured to receive a reductant and exhaust gas mixture.
12/12/13
20130330258
Base metal catalyst and method of using same
Aspects of the invention relate to a base metal catalyst composition effective to catalyze the abatement of hydrocarbons, carbon monoxide and nitrogen oxides under both rich and lean engine operating conditions comprising a support including at least 10% by weight of reducible ceria doped with up to about 60% by weight of one or more of oxides selected from the group al, pr, sm, zr, y, si, ti and la; and a base metal oxide on the reducible ceria support, the base metal selected from one or more of ni, fe, mn, cu, co, ba, mg, ga, ca, sr, v, w, bi and mo, the base metal catalyst composition effective to promote a steam reforming reaction of hydrocarbons and a water gas shift reaction to provide h2 as a reductant to abate nox. Other aspects of the invention relate to methods of using and making such catalysts..
12/12/13
20130330244
Compositions and methods for topical nitric oxide generation
A simple, biocompatible two-component system and procedure for generating nitric oxide (no) is described. One component comprises sodium nitrite or other nitrite source, and the other component comprises a reductant, an acid and a base although in certain embodiments the reductant and acid functions are provided by the same component.
12/05/13
20130323145
Base metal catalyst composition and methods of treating exhaust from a motorcycle
Aspects of the invention relate to a method of treating a gas stream generated by a motorcycle, the method comprising: contacting a gas stream containing hydrocarbons, carbon monoxide and nitrogen oxides and generated by a motorcycle under both rich and lean engine operating conditions with a base metal catalyst composition, thereby removing at least a part of the hydrocarbons, carbon monoxide and nitrogen oxides in gas stream. The base metal catalyst composition comprises a support including at least 10% by weight of reducible ceria, and about 3 to about 7 wt % mno and about 8 to about 22 wt % cuo on the reducible ceria support.
11/07/13
20130291517
Exhaust diagnostic control system and method with selective disablement of nox reduction efficiency diagnostic
An exhaust diagnostic control system comprises a test enabling module, an exhaust gas temperature management module in communication with the test enabling module, and a component management module configured for executing a test for determining a reduction efficiency associated with the after-treatment component. The test enabling module is configured for assessing a reliability of an estimated level of reductant load on an after-treatment component, and, based on the reliability, selectively facilitating disablement of a subsequent test for determining an efficiency of nox reduction in the after-treatment component.
10/31/13
20130288140
Biological fuel cell and methods
A fuel cell has an anode and a cathode with anode enzyme disposed on the anode and cathode enzyme is disposed on the cathode. The anode is configured and arranged to electrooxidize an anode reductant in the presence of the anode enzyme.
10/31/13
20130287664
System and method for exhaust gas after treatment
A hydrocarbon selective catalytic reduction (hc-scr) catalyst is regenerated using a nitrogen-based reductant agent. The hc-scr catalyst is in communication with a power system such as an internal combustion engine and receives exhaust gasses from the internal combustion engine.
10/24/13
20130276430
Pumping device for supplying an exhaust gas aftertreatment system of an internal combustion engine with a reductant, and method
The invention relates to a pumping device (20) for supplying an exhaust gas aftertreament system (10) of an internal combustion engine with a reductant (14), in particular with a urea-water solution, in order to reduce nitrogen oxides (nox) in the exhaust gas flow of the internal combustion engine, comprising a motor (32) for driving two pumps (22, 24). According to the invention, the first pump (22) is connected to the motor (32) by means of a first coupling, and the second pump (24) is connected to the motor by means of a second coupling.
10/24/13
20130276428
Exhaust diagnostic control system and method with nh3 depletion cleansing
An exhaust diagnostic control system comprises a test enabling module, an exhaust gas temperature management module, and an exhaust diagnostic control system. The test enabling module is configured for executing a process for depleting a reductant load and subsequently establishing a known concentration of reductant on an after-treatment component following an occurrence of one or more trigger events.
10/17/13
20130269325
Multi-tiered telescope shaped atomizer
In one example, a system is provided, comprising an exhaust reductant injector upstream of a mixer. The mixer includes a plurality of concentrically smaller rings interconnected via fins having a width varying in a flow direction, the fins arranged annularly, and with a first set of fins between a first pair of adjacent rings angularly offset from a second set of fins between a second pair of adjacent rings, the first and second pairs of rings sharing one common ring.
10/17/13
20130269317
Technique for production of ammonia on demand in a three way catalyst for a passive selective catalytic reduction system
A powertrain includes an internal combustion engine with multiple cylinders and an aftertreatment system having a selective catalytic reduction device utilizing ammonia as a reductant. An ammonia generation cycle includes operating some portion of the cylinders at an air/fuel ratio conducive to producing molecular hydrogen and some portion of the cylinders at an air/fuel ratio conducive to producing nox.
10/10/13
20130264198
Synthesis of nanoparticles using ethanol
The present disclosure relates to methods for producing nanoparticles. The nanoparticles may be made using ethanol as the solvent and the reductant to fabricate noble-metal nanoparticles with a narrow particle size distributions, and to coat a thin metal shell on other metal cores.
10/10/13
20130263591
Nitrogen dioxide generation diagnostic for a diesel after-treatment system
A method for assessing no2 generation efficiency in a diesel engine after-treatment (at) system having a diesel oxidation catalyst (doc) downstream of the engine generating the no2 and a selective catalytic reduction (scr) catalyst downstream of the doc converting nox with the aid of the no2. Engine exhaust gas flow is passed into the at system and a reductant is injected into the gas flow between the doc and the scr catalyst.


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Reductant topics: Internal Combustion Engine, Exhaust Gas, Scr Catalyst, Combustion, Selective Catalytic Reduction, Catalytic Reduction, Downstream, Nox Reduction, Nanoparticle, Hydrogen Sulfide, Regenerate, Hydrocarbon, Nitrogen Dioxide, Diesel Oxidation Catalyst, Conversion Efficiency

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