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Reductant patents

      

This page is updated frequently with new Reductant-related patent applications.




 Diesel exhaust fluid deposit mitigation patent thumbnailDiesel exhaust fluid deposit mitigation
One form of the present application is an apparatus including an internal combustion engine structured to produce an exhaust flow, an exhaust system structured to receive the exhaust flow, and a reductant injector structured to inject reductant into a primary passage of the exhaust system upstream of a catalyst. The apparatus further includes an injector passage structured to receive a portion of exhaust upstream of the injector and further structured to flow the exhaust into the primary passage around the injector in a manner such that deposit formation is reduced..
Cummins Emission Solutions, Inc.


 Method of operating an aftertreatment system of an internal combustion engine patent thumbnailMethod of operating an aftertreatment system of an internal combustion engine
A method of operating an aftertreatment system of an internal combustion engine having a lean nitrogen-oxides trap and a reductant storage device placed downstream of the lean nitrogen-oxides trap is disclosed. A regeneration of the lean nitrogen-oxides trap is performed.
Gm Global Technology Operations Llc


 Asynchronous reductant insertion in aftertreatment systems patent thumbnailAsynchronous reductant insertion in aftertreatment systems
An aftertreatment system comprises a first scr system, a second scr system positioned downstream of the scr system and a reductant storage tank. At least one reductant insertion assembly is fluidly coupled to the reductant storage tank.
Cummins Emission Solutions Inc.


 Catalyzed scr filter and emission treatment system patent thumbnailCatalyzed scr filter and emission treatment system
Provided is a catalyst article for simultaneously remediating the nitrogen oxides (nox), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The catalyst article has a soot filter coated with a material effective in the selective catalytic reduction (scr) of nox by a reductant, e.g., ammonia..
Basf Corporation


 Emissions control systems and methods patent thumbnailEmissions control systems and methods
Methods and systems are provided related to an emissions control system. The emissions control system has an exhaust after-treatment system defining a plurality of distinct exhaust flow passages through which at least a portion of an exhaust stream can flow, e.g., the exhaust stream is produced by an engine.
General Electric Company


 Methods and systems related to selective catalytic reduction patent thumbnailMethods and systems related to selective catalytic reduction
An exhaust processing system for treating an exhaust gas stream that includes an exhaust duct for directing the exhaust gas stream; a first catalyst positioned within the exhaust duct for receiving the exhaust gas stream flowing therethrough; and an injection system for injecting cooling air and reductant in the exhaust gas stream. The injection system may include: a reductant supply feed for supplying the reductant; a cooling air supply feed for supplying the cooling air; a junction configured at which the reductant supply feed and the cooling air supply feed combine to form a combined supply feed thereafter; and an injector disposed within the exhaust duct to which the combined supply feed connects..
General Electric Company


 Treatment of emissions in power plants patent thumbnailTreatment of emissions in power plants
A method for injecting a reductant into an exhaust gas stream of a combustion turbine engine for selective catalytic reduction. The method may include the steps of: directing the exhaust gas stream through an exhaust duct; receiving the directed exhaust gas for treatment by a catalyst positioned within the exhaust duct; providing a reductant in a liquid state; pressurizing and heating the reductant in a manner that maintains the reductant in the liquid state; and injecting the heated, pressurized reductant into the exhaust gas stream such that the reductant flash vaporizes upon injection due to a pressure differential..
General Electric Company


 Diagnostic methods for a high efficiency exhaust aftertreatment system patent thumbnailDiagnostic methods for a high efficiency exhaust aftertreatment system
An apparatus includes a nitrogen oxide (nox) module and a selective catalytic reduction (scr) diagnostic module. The nox module is in exhaust gas communication with an exhaust flow of an exhaust aftertreatment system from an engine.
Cummins, Inc.


 Reductant supply system patent thumbnailReductant supply system
A reductant supply system for an exhaust aftertreatment system is disclosed. The reductant supply system may include a controller configured to receive an engine system operation signal and transmit a reductant delivery signal in response to the engine system operation signal, an injector configured to dispense a reductant fluid into an exhaust gas flow of the exhaust aftertreatment system in response to the reductant delivery signal, and a pump configured to actuate between an off condition and an on condition in response to the reductant delivery signal.
Caterpillar Inc.


 Virtual reductant level sensor patent thumbnailVirtual reductant level sensor
An aftertreatment system comprises a reductant storage tank and a scr system fluidly coupled thereto. A reductant physical level sensor and a tank temperature sensor are operatively coupled to the reductant storage tank.
Cummins Emission Solutions Inc.


Air-assist dosing system having priming detection

A reductant dosing system is disclosed as having a pump, and suction, discharge, and return passages. The system may also have a return valve, an air passage, and an air valve.
Caterpillar Inc.

Converging liquid reductant injector nozzle in selective catalytic reduction systems

A liquid reductant injector nozzle includes a first portion defining a hollow cylindrical static chamber, in fluid communication with second portion defining a hollow frustoconical converging section, which is in turn in fluid communication with a sharp edged type discharge orifice. The hollow cylindrical static chamber is in reductant receiving communication with a reductant source, and has a first and second circular opening having equal diameters.
Cummins Emission Solutions Inc.

Ammonia sensor control, with nox feedback, of an scr aftertreatment system

An exemplary method includes determining an nh3 reference target in an exhaust conduit between a first scr catalyst and a second scr catalyst. The method includes determining a present amount of nh3 in the exhaust conduit between the first scr catalyst and the second scr catalyst, and determining an nh3 error term in response to the nh3 reference target and the present amount of nh3.
Cummins Inc.

Catalytic deoxygenation of bio-oils using methane

This disclosure provides a new approach for bio-oil upgrading using methane as reductant instead of hydrogen. Guaiacol, produced by thermal degradation of lignin, represents a model compound for upgrading of fast pyrolysis bio-oils by deoxygenation.
Purdue Research Foundation

Visual marking and geometric poke-yoke for fluid and electrical lines of aftertreatment systems

An aftertreatment system comprises an scr system and at least one reductant insertion assembly fluidly coupled thereto. The reductant insertion assembly includes an injector and reductant storage tank.
Cummins Emission Solutions Inc.

Heating system for an exhaust gas treatment system

The present disclosure relates to a heating system for an exhaust gas treatment system. The heating system comprises a first heating element comprising a receiving surface for receiving a reductant fluid and a second heating element, which may surround the first heating element.
Perkins Engines Company Limited

Exhaust aftertreatment device for aftertreatment of exhaust of an internal combustion engine

An exhaust aftertreatment device for aftertreatment of exhaust gas of an internal combustion engine includes an scr catalyst for selective catalytic reduction, a feeding apparatus for adding a reductant at an entry point upstream of the scr catalyst to the exhaust gas, and a mixing apparatus arranged in a flow direction of the exhaust gas between the entry point and the scr catalyst. The mixing apparatus includes a mixing element and a catalyst element, with the catalyst element having in the flow direction of the exhaust gas a cross sectional area which is smaller than a cross sectional area of the mixing element..
Audi Ag

Constant mass flow injection system

Exhaust aftertreatment assemblies and methods of manufacturing and operating exhaust aftertreatment assemblies. The exhaust aftertreatment assembly includes a reductant delivery device, a reductant source fluidly coupled to the reductant delivery device, a mixing chamber positioned between the reductant delivery device and the reductant source and thereby fluidly coupling the reductant source to the reductant delivery device, and a compressed air source fluidly coupled to the mixing chamber upstream of the mixing chamber with respect to the reductant delivery device.
Cummins Emission Solutions, Inc.

Header unit for reductant tank

A header unit for a reductant tank is provided. The header unit includes a reductant draw conduit extending into an interior space of the reductant tank.
Caterpillar Inc.

Control of multiple reductant insertion assemblies using a single controller

An aftertreatment system comprises a first bank to receive a first portion of an exhaust gas and a second bank to receive a second portion of the exhaust gas. A first reductant insertion assembly is fluidly coupled to the first bank and a parent controller is communicatively coupled thereto.
Cummins Emission Solutions Inc.

Systems and techniques for heating urea injection systems

A reductant delivery system is provided for delivery of reductant to an engine exhaust aftertreatment system that is heated during cold temperature conditions. A heat exchange fluid flows through a heat exchange circuit that provides a flow path from the heat source to the doser, from the doser to the reductant storage tank, and from the reductant storage tank to the heat source.
Cummins Emission Solutions Inc.

Photochemical reaction device

According to one embodiment, a photochemical reaction device includes: a solar cell; an electrolytic tank having a first tank storing a first solution including an oxidant and/or reductant of a redox medium and a second tank storing a second solution including water and/or proton; a first electrode set in the first tank, connected to a positive electrode of the solar cell through a first switching element, and connected to a negative electrode of the solar cell through a second switching element; and a second electrode set in the second tank, connected to the positive electrode of the solar cell through a third switching element, and connected to the negative electrode of the solar cell through a fourth switching element.. .
Kabushiki Kaisha Toshiba

Method and chemical removal of acid gas from combustion emissions and natural gas streams

A method of treating acid gas from fuel emissions or ambient air is performed by contacting the acid gas with a highly reactive reductant that has been prepared in a vessel positioned with two electrodes separated by a membrane. An electric potential is applied across the electrodes at a selected voltage and current necessary to generate a strong reductant within the cathodic cell.
Anni Environmental, Llc

Reductant dosing correction during no dosing periods

A system may include a nox sensor and a controller. The controller may be configured to interpret a value of a first parameter indicative of an amount of nox measured by the nox sensor and interpret a value of a second parameter for a nox value from a look-up table.
Cummins Emission Solutions Inc.

Distributed control of selective catalytic reduction systems

Methods and systems are provided for modeling a reductant temperature and storage distribution of a scr catalyst axially and radially. In one example, a method may include modeling an expected distribution of stored reductant among a plurality of axial zones and a plurality of radial zones of an scr catalyst arranged in an engine exhaust passage and comparing the expected distribution with a reductant storage setpoint of each zone to adjust radial and axial storage locations..
Ford Global Technologies, Llc

Fuel and process for powering a compression ignition engine

A diesel engine fuel composition including methanol, at least 5% by weight water, one or more additives selected from the group consisting of: ignition improvers, fuel extenders, combustion enhancers, oxygen absorbing oil, lubricity additives, product colouration additives, flame colour additives, anti corrosion additives, biocides, freeze point depressants, deposit reductants, denaturants, ph controlling agents, and mixtures thereof, and 0% to 20% by weight dimethyl ether. Also provided is a process of powering a compression ignition engine using such a diesel engine fuel..
Gane Energy & Resources Pty Ltd.

Aftertreatment exhaust separator and/or deflector

An exhaust elbow includes an upstream sidewall defining an upstream portion of the exhaust elbow, a downstream sidewall defining a downstream portion of the exhaust elbow, and a deflector. The upstream portion is configured to receive an upstream exhaust gas.
Cummins Emission Solutions Inc.

Selective catalytic reduction (scr) de-nox equipment for removing visible emission

The present invention relates to a selective catalytic reduction denitrification equipment for efficiently removing visible emission (yellow plume; yellow fume) by using selective catalytic reduction in order to remove the yellow fume during starting-up a gas turbine in a combined heat power or the like. To this end, a reductant supply condition is improved in an existing nitrogen oxide reduction apparatus, which uses a selective catalytic reduction method, and a ratio of no2/nox is precisely adjusted, thereby creating an excellent effect of removal of yellow fume from exhaust gas at a low temperature of 130° c.
Geesco Co., Ltd.

Locating pin

Systems and methods for tracking and indicating a status for the deliverable reductant, such as ammonia, in a canister used in an exhaust gas after-treatment system are disclosed. An on-board system provides a visual display to indicate either generally or specifically the fill-status of each of a plurality of loaded ammonia canisters, while a separate canister system is able to be periodically updated while on-line and, using a memory device such as a rfid tag, carry the updated fill-status even when it is removed from the vehicle system.
International Engine Intellectual Property Company Llc

Method for manufacturing metal nano-wire

A method for manufacturing metal nano-wires is described, which is suitable for manufacturing silver nano-wires and copper nano-wires and includes the following steps. A metal nano-particle resulting solution is prepared to mix a first metal ionic compound, a first reductant and a first capping agent, so as to form various metal nano-particles.
National Cheng Kung University

Cerium-modified manganese octahedral molecular sieves as catalysts for selective catalytic reduction

Catalysts and articles useful for selective catalytic reduction (scr) are disclosed. The catalyst comprises a cerium oxide and an octahedral molecular sieve (oms) comprising manganese oxide.
Johnson Matthey Public Limited Company

Systems and methods for control of engine nox emissions using liquid and dry reductant sources

reductant delivery systems are disclosed that include a dry reductant source and a liquid reductant source which are operable to selectively provide gaseous reductant and liquid reductant to an exhaust aftertreatment system for treatment and reduction of nox emissions. The gaseous reductant is provided to the exhaust aftertreatment system for treatment of nox emissions under a first temperature condition associated with the exhaust system and the liquid reductant for treatment of nox emissions under a second temperature condition associated with the exhaust system..
Cummins Emission Solutions Inc.

Fluid reservoir having inlet filtering

An inlet filter is disclosed for use with a reductant tank having a fill spout. The inlet filter may have a generally cylindrical base portion with an open top end and an open bottom end and configured for mounting inside the fill spout.
Caterpillar Inc.

Micro-encapsulation of ozonated oils

A two-part oral care system includes a plurality of micro-encapsulated vessels containing an oxidative composition inside a coating, the oxidative composition having a ph less than 7.5, and a reductant composition, the reductant composition having a ph greater than 7. The micro-encapsulated vessels isolate the oxidative and reductant compositions from reacting with one another during storage and wherein the micro-encapsulated vessels can dispense when ruptured the oxidative and reductant compositions for combining to result in a final composition for use.

Mixing assembly for reducing exhaust reductant deposits

An aftertreatment system comprises a scr system. A mixing assembly is positioned upstream of the scr system and includes a housing defining a flow path for an exhaust gas.
Cummins Emission Solutions, Inc.

Hydraulic mining shovel with scr unit

The present disclosure relates to a hydraulic mining shovel. The shovel may comprise a main frame, a power module and a counterweight module.
Caterpillar Global Mining Llc

Detection of an improper reductant in a storage tank

An aftertreatment system comprises an exhaust reductant storage tank and a scr system including a catalyst fluidly coupled thereto. The aftertreatment system also includes a controller configured to interpret an output signal indicative of a catalytic efficiency of the catalyst.
Cummins Emission Solutions, Inc.

Engine exhaust system decomposition tube

A reductant decomposition reactor for use in exhaust systems and a method for making the same are provided, wherein the reactor includes a unitary tube portion formed with a reductant injector mount and a mixer mounted therein. The mixer fits in a seamless tube portion and is configured to enhance a reductant and an exhaust stream..
Nelson Global Products, Inc.

Antimicrobial polymer emulsion with improved color stability

Provided is a process for forming forming an antimicrobial polymer composition comprising: contacting together at least one initiator, at least one promoter, at least one reductant, and at least one monomer, under emulsion polymerization conditions to form a base polymer; and mixing with the base polymer an antimicrobial complex; wherein the at least one initiator is a peroxidic compound and the at least one reductant is an ascorbic compound.. .
Rohm And Haas Company

Integrated reductant supply system

An integrated reductant supply system includes a reductant tank, a reductant dosing module selectively couplable to the reductant tank, an aftertreatment control module coupled to the reductant tank and in electrical communication with the reductant dosing module and a connector, and an integrated reductant supply system component. The aftertreatment control module is configured to control dosing of reductant from the reductant dosing module, and the connector configured to electrically couple to an equipment manufacturer component.
Cummins Emission Solutions Inc.

Method of controlling an engine system

The present disclosure is directed towards a method of controlling an engine system comprising an exhaust aftertreatment module and a controller. The exhaust aftertreatment module is for receiving exhaust gas from an internal combustion engine and comprises a reductant injector selectively operable to inject a reductant fluid from an injector outlet.
Perkins Engines Company Limited

Method for depolluting exhaust gas, notably from internal-combustion engines, in particular for motor vehicles, and plant using same

The present invention is a method for removing pollution from exhaust gas circulating in an exhaust line (12) of an internal-combustion engine, the exhaust line comprises an ammonia-sensitive catalysis means (46) with selective nox catalytic reduction traversed by the gas and a means (56, 58) for injecting a reductant of the pollutants the decomposes the reductant into a hydrogen gas phase and an ammonia gas phase and, for a gas temperature below approximately 150° c. Injects the hydrogen into the exhaust line in combination with a hydrogen-sensitive nox catalysis means..
Ifp Energies Nouvelles

Fuel limit vent valve having vapor permeable membrane

A fill limit vent valve configured for use with a reductant tank includes a valve body, a float and a vapor permeable membrane. The valve body can define an inner chamber and has a valve outlet.
Eaton Corporation

Exhaust purification device and calculating nox mass adsorbed in lean nox trap of exhaust purification device

A method of calculating a nitrogen oxide (nox) mass adsorbed in a lean nox trap (lnt) of an exhaust purification device includes calculating a nox mass flow stored in the lnt, calculating a nox mass flow thermally released from the lnt, calculating a nox mass flow released from the lnt at the rich air/fuel ratio, calculating a nox mass flow chemically reacting with the reductant at the lnt, and integrating a value obtained by subtracting the nox mass flow thermally released from the lnt, the nox mass flow released from the lnt at the rich air/fuel ratio, and the nox mass flow chemically reacting with the reductant at the lnt from the nox mass flow stored in the lnt.. .
Fev Gmbh

Techniques for control of an scr aftertreatment system in response to an ammonia slip condition

An exhaust aftertreatment system includes a selective catalytic reduction (scr) catalyst is disposed in an exhaust gas system of an internal combustion engine. A reductant injector is coupled to the exhaust gas stream at a position upstream of the scr catalyst.
Cummins Inc.

System and operator indication for filling reductant tank

A system and method to provide an operator indication for filling a reductant tank is provided. A first temperature sensor and a second temperature sensor receives a first signal and a second signal indicative of a coolant temperature and an ambient temperature associated with the reductant tank, respectively.
Caterpillar Inc.

System, method, and 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.
Cummins Emission Solutions Inc.

Gaseous ammonia injection system

An aftertreatment system comprises a liquid exhaust reductant tank. A heat exchanger is positioned downstream of the preheater.
Cummins Emission Solutions, Inc.

Recessed exhaust reductant injector with cover plate

An aftertreatment system comprises a housing defining an internal volume. The housing includes an inlet, an outlet and a sidewall defining a recess therein.
Cummins Emission Solutions, Inc

Recessed exhaust reductant injector with cover plate

An aftertreatment system comprises a housing defining an internal volume. The housing includes an inlet, an outlet and a first sidewall.
Cummins Emission Solutions Inc.

Reductant filling assembly

A reductant filling assembly includes a first end and a second end, the first end adapted to connect from an interior side of a machine to a supply port attached to a receiver extending to an exterior side of the machine; a housing extending between the first end and the second end of the reductant filling assembly, the housing extending from a first housing end to a second housing end; a reductant supply conduit, a first circulating conduit, and a second circulating conduit extending through the housing from the first end to the second end. At least the first circulating conduit is in thermal communication with a wall of the reductant supply conduit, such that a heating fluid flowing through the first circulating conduit in a first direction transfers heat to a reductant fluid in the reductant supply conduit..
Caterpillar Inc.



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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    This listing is a sample listing of patent applications related to Reductant for is only meant as a recent sample of applications filed, not a comprehensive history. There may be associated servicemarks and trademarks related to these patents. Please check with patent attorney if you need further assistance or plan to use for business purposes. This patent data is also published to the public by the USPTO and available for free on their website. Note that there may be alternative spellings for Reductant with additional patents listed. Browse our RSS directory or Search for other possible listings.


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