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Reductant

Reductant-related patent applications - as published by the U.S. Patent and Trademark Office (USPTO).


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System and method for regulating exhaust emissions
Deere & Company
March 29, 2018 - N°20180087426

An exhaust gas treatment system for an internal combustion engine includes an exhaust gas pathway that receives exhaust gas from the engine, a temperature sensor configured to generate a temperature signal associated with a temperature of the exhaust gas at a position along the exhaust gas pathway, and a reductant source. The system also includes first and second injectors in ...
Scr diesel particle filter with oxidation catalyst and oxygen storage catalyst loadings, and exhaust system ...
Umicore Ag & Co. Kg
March 22, 2018 - N°20180080359

A particle filter for treating exhaust gases includes an scr catalyst that, when in the presence of a reductant such as ammonia, promotes selective catalytic reduction of nox; an active oxidation catalyst that promotes oxidation of hydrocarbons and carbon monoxide; and an oxygen storage catalyst that alternately stores and releases oxygen, enhances soot oxidation, and stores nox at temperatures below ...
A method for controlling the injection of reductant for an exhaust after treatment unit
Volvo Truck Corporation
March 15, 2018 - N°20180073408

A method is provided for controlling the injection, by a reductant injector in an exhaust system for an internal combustion engine, of reductant for an exhaust aftertreatment unit of the exhaust system, for example a selective catalytic reduction (scr) unit. The method includes determining a reductant injection debt in dependence on a reductant flow according to at least a first ...
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Method for controlling an exhaust gas treatment system
Gm Global Technology Operations Llc
March 15, 2018 - N°20180071681

Provided is a method for controlling an exhaust gas treatment system, wherein the system includes an exhaust gas stream supplied by an exhaust gas source to a selective catalytic reduction (scr) device and a particulate filter device. The method comprises detecting a threshold level of reductant deposits proximate the scr device, and initiating a selective catalytic reduction device service in ...
Heat dissipation elements for reductant delivery unit for automotive selective catalytic reduction system
Continental Automotive Systems, Inc.
March 01, 2018 - N°20180058291

An injector having at least one heat dissipation element used for providing a highly conductive path for transferring heat away from a valve portion of an injector. In one embodiment, the heat dissipation element is a cylindrical element, or conductive plug, in contact with the injector valve body and the injector housing. In one embodiment, the heat dissipation element is ...
Apparatus and methods for evaluating a soot quantity accumulated in a selective catalytic reduction washcoated ...
Gm Global Technology Operations Llc
March 01, 2018 - N°20180058284

Methods for evaluating a soot quantity accumulated in a selective catalytic reduction wash-coated particulate filter (scrf) of an exhaust gas treatment system are provided, and include injecting reductant proximate the scrf, determining one or more mapping values, computing a correction value of a soot quantity using a map correlating the one or more mapping values, detecting an apparent soot burning ...
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Reductant dosing unit compact side feed inlet port
Continental Automotive Systems, Inc.
February 22, 2018 - N°20180051613

A side feed inlet port for an injector, which makes use of stamped parts to form a compact, high strength three-piece inlet port at a significantly reduced cost. By using an inner sleeve and an outer sleeve, injector sealing is accomplished using the interior sleeve, creating a sealing point, while allowing for inlet conduit attachment to the outer sleeve at, ...
Emission control with switchability between emission standards
Caterpillar Inc.
February 15, 2018 - N°20180045095

An emission control system for an engine includes a user interface having an emission standards switchability button, which may initiate a plurality of control operations to effect a switch between two different emission standards applicable to operation of the engine. A controller communicatively coupled with the user interface includes a memory encoding one or more processor-executable routines and a processor ...
Systems and methods for purging an exhaust reductant delivery system
Cummins Emission Solutions, Inc.
February 08, 2018 - N°20180038358

A hydraulic system comprises a fluid tank and a pump, including a pump reservoir, fluidly coupled to the tank via a supply line. A valve is in fluidic communication with the pump reservoir via a pressure line. A backflow line fluidly couples the pump reservoir to the fluid tank via a timer reservoir and an orifice included in the timer ...
Method for controlling an exhaust gas treatment system
Gm Global Technology Operations Llc
February 08, 2018 - N°20180038298

A method for controlling an exhaust gas treatment system is provided. The exhaust gas treatment system includes an exhaust gas stream supplied by an exhaust gas source to a selective catalytic reduction device and a particulate filter device. Additionally or alternatively, the exhaust gas treatment system includes an exhaust gas stream supplied by an exhaust gas source to a selective ...
Protecting group chemistry for clean, reductant-free dyeing
The Regents Of The University Of California
February 08, 2018 - N°20180037917

The present disclosure relates to the biosynthesis of indigoid dye precursors and their conversion to indigoid dyes. Specifically, the present disclosure relates to methods of using polypeptides to produce indigoid dye precursors from indole feed compounds, and the use of the indigoid dye precursors to produce indigoid dyes.
Continuous hydrogenation of levulinic acid
Dsm Ip Assets B.v.
January 25, 2018 - N°20180022721

The invention relates to a continuous or repetitive batch process for the hydrogenation of levulinic acid (la) or esters thereof to at least gamma valerolactone (gvl) in a reactor comprising a feed stream and an outlet stream, in the presence of a solid ru catalyst, said process comprising (a) pretreating said solid ru catalyst with a reductant; and (b) reacting ...
Stabilized metal-exchanged sapo material
Basf Corporation
January 25, 2018 - N°20180021764

Described are catalyst materials and catalytic articles comprising a metal exchanged sapo material comprising a plurality of substitutional sites consisting essentially of si(4al) sites and substantially free of si(0al) sites. The materials and catalytic articles are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant.
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Exhaust treatment apparatus and method
Jaguar Land Rover Limited
January 11, 2018 - N°20180010501

The present invention relates to an exhaust treatment apparatus (1) for an internal combustion engine (5). The apparatus includes a catalyst chamber (15) containing a catalyst (35). One or more exhaust gas inlets (11a-d) are provided for supplying exhaust gases from the internal combustion engine (5) to the catalyst chamber (c). An exhaust gas outlet (21) for supplying exhaust gases from the catalyst chamber to a ...
Method for production of a composite material using excess oxidant
Coogee Titanium Pty Ltd
January 11, 2018 - N°20180010209

A method of producing a composite material comprising: supplying a metal compound (mpc) of a product metal (mp) and a reductant (r) capable of reducing the metal compound (mpc) of the product metal (mp) to a reactor; forming a composite material comprising a matrix of oxidised reductant (r0) of the reductant (r), the product metal (mp) dispersed in the matrix ...
Nox sensor diagnostic for an exhaust aftertreatment system
Cummins, Inc.
January 04, 2018 - N°20180003098

A method for diagnosing nox sensors in an exhaust aftertreatment system includes suspending reductant dosing in an exhaust aftertreatment system; purging a reductant deposit in a selective catalytic reduction (scr) system of the exhaust aftertreatment system; adjusting at least one of an ignition timing and an engine speed for an engine to adjust an engine out nitrogen oxide (nox) amount; ...
Reductant injection in exhaust manifold
Cummins, Inc.
December 28, 2017 - N°20170370263

An aftertreatment system comprises a first passageway having a first temperature and a second passageway having a second temperature different than the first temperature. A turbine is disposed downstream from the first passageway and upstream from the second passageway. The turbine is in fluidic communication with the first passageway and the second passageway. The turbine is structured to receive an ...
Method and apparatus for controlling reductant injection into an exhaust gas feedstream of an internal ...
Gm Global Technology Operations Llc
December 28, 2017 - N°20170370261

An exhaust aftertreatment system including a selective catalytic reduction device (scr), a nox sensor and a reductant injection system is described. A method for controlling the reductant injection system to inject reductant into the exhaust gas feedstream upstream relative to the scr includes monitoring engine operation, and determining an initial reductant dosing rate responsive to the engine operation. A dosing ...
Molecular sieve catalyst compositions, catalyst composites, systems, and methods
Basf Corporation
December 28, 2017 - N°20170368541

Described is a selective catalytic reduction material comprising a spherical particle including an agglomeration of crystals of a molecular sieve. The catalyst is a crystalline material that is effective to catalyze the selective catalytic reduction of nitrogen oxides in the presence of a reductant at temperatures between 200° c. And 600° c. A method for selectively reducing nitrogen oxides and ...
Exhaust fluid filter including hydrocarbon detection witness media
Cummins Emission Solutions, Inc.
December 14, 2017 - N°20170356320

An aftertreatment system includes an exhaust reductant tank configured to store an exhaust reductant. A filter is fluidically coupled to the exhaust reductant tank. The aftertreatment system includes a hydrocarbon detection device configured to indicate the presence of a hydrocarbon in the exhaust reductant. A catalyst is included in the system and configured to treat the exhaust reductant flowing through ...
Product for the depollution of exhaust gases, especially from an inernal combustion engine, and method ...
December 07, 2017 - N°20170350288

According to the invention, the product comprises a mixture of a reductant containing ammonia or a compound generating ammonia by decomposition, or a hydrocarbon from a hydrocarbon-containing substance, oxygenated or not, and of an additive for catalysing particle oxidation.
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