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Reductant

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


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Injector deposit detection for scr injection system
Perkins Engines Company Limited
June 14, 2018 - N°20180163605

A method for monitoring an scr injection system is disclosed. The method includes operating a pump, and measuring a first pressure drop value in the scr injection system during actuation of a reductant injector.
Injector deposit dissolution system and method
Perkins Engines Company Limited
June 14, 2018 - N°20180163595

An scr injection system for an internal combustion engine is disclosed. Under certain conditions, reductant fluid supplied by the system may form deposits in a reductant injector.
Method and apparatus for controlling reductant injection into an exhaust gas feedstream from an internal ...
Gm Global Technology Operations Llc
June 14, 2018 - N°20180163589

An exhaust aftertreatment system includes first and second selective catalytic reduction devices (scrs) and a single reductant injection system. A total ammonia storage capacity and an ammonia storage level are determined for the first and second scrs, and determine a total scr ammonia storage level for the first and second scrs based upon the ammonia storage level on the first ...
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Automatic performance tuning for diesel exhaust fluid dosing unit
Cummins Emission Solutions, Inc.
May 31, 2018 - N°20180149058

An auto-calibration controller configured to automatically tune a dosing unit of an aftertreatment system. The auto-calibration controller is configured to command the dosing unit to dose reductant at a first dosing command rate at a first input pressure value based on a dosing command value of a dosing command table.
Method for controlling an exhaust gas treatment system
Gm Global Technology Operations Llc
May 31, 2018 - N°20180149056

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 reductant supply source utilizing a volumetric pump.
Model predictive control for multi-can selective catalytic reduction system
Gm Global Technology Operations Llc
May 24, 2018 - N°20180142593

Disclosed are model predictive control (mpc) systems, methods for using such mpc systems, and motor vehicles with selective catalytic reduction (scr) employing mpc control. An scr-regulating mpc control system is disclosed that includes an nox sensor for detecting nitrogen oxide (nox) input received by the scr system, catalyst nox sensors for detecting nox output for two scr catalysts, and catalyst ...
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Reductant Patent Applications
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  • 100+ full patent PDF documents of Reductant-related inventions.
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Redox-air indirect fuel cell
United Technologies Corporation
May 17, 2018 - N°20180138567

An electrochemical device includes first and second spaced-apart electrodes. The first electrode is configured for redox reactions with a liquid electrolyte solution and the second electrode is configured for redox reactions with each of a gaseous reductant and a gaseous oxidant.
Method for validating signals generated by acoustic sensors
Gm Global Technology Operations Llc
May 17, 2018 - N°20180135494

A method for monitoring the reductant quantity in a reservoir method is provided. The reductant is stored within the reservoir for use within an exhaust gas treatment system of a vehicle, and the reservoir comprises an acoustic sensor disposed within the reductant and capable of generating signals relating to the volume of reductant within the reservoir.
Exhaust system
Ford Global Technologies, Llc
May 17, 2018 - N°20180135488

Methods and systems are provided for scr devices cascaded along an exhaust passage. In one example, a method may include adjusting a reductant injection pressure based on a temperature of one or more of the scr devices..
Engine exhaust emissions treatment system
Illinois Valley Holding Company
May 17, 2018 - N°20180135482

An engine system includes a compression ignition diesel engine connected with an aftertreatment system. A source of diesel fuel, which may have a high sulfur content, is fluidly connected to the engine.
Reductant spray and exhaust gas flow guide and deflector
Gm Global Technology Operations Llc
May 10, 2018 - N°20180128146

An after-treatment (at) system for an exhaust gas flow from an internal combustion engine includes first and second at devices positioned in the exhaust gas flow. The at system also includes an exhaust passage for carrying the flow of exhaust gas from the first at device to the second at device.
Diesel exhaust fluid cooled reductant delivery unit for selective catalytic reduction systems
Continental Automotive Systems, Inc.
April 19, 2018 - N°20180106180

A reductant delivery unit (rdu) for a selective catalytic reduction system, including a housing; a fluid inlet disposed at an upper portion of the housing; a fluid return outlet; a fluid nozzle outlet disposed at a lower portion of the housing; an injector disposed within the housing and configured to receive fluid from the fluid inlet and selectively discharge the ...
Systems and methods for idle fuel economy mode
Cummins Inc.
April 19, 2018 - N°20180106179

An apparatus includes a stored reductant determination circuit structured to determine an amount of stored reductant in a component of an exhaust aftertreatment system, and a fuel mode economy circuit structured to control an amount of reductant added to the exhaust aftertreatment system during an engine idle mode of operation based on the amount of stored reductant.. .
Reductant Patent Pack
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Reductant Patent Applications
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For professional research & prior art discovery
inventor
  • 100+ full patent PDF documents of Reductant-related inventions.
  • Exact USPTO filing data with full-text, images, drawings & claims.
  • Index pages: Table View and Image-Grid View layouts. All images in each PDF.
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 ...
Reductant delivery system
Caterpillar Inc.
March 15, 2018 - N°20180073407

A reductant delivery system for an engine system. The engine system includes an engine having an exhaust conduit and a turbocharger with a compressor.
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.
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 ...
Process for forming a solution containing gold nanoclusters binding with ligands
Goldred Nanobiotech Co., Ltd.
March 01, 2018 - N°20180055083

The present invention discloses a process for forming a solution containing gold nanoclusters binding with ligands, the process comprises the following steps: provide a aqueous solution that comprises a gold precursor, a base and ligands; perform a reduction reaction by adding a reductant into the aqueous solution to form a liquid containing gold nanoclusters binding with the ligands; concentrate the ...
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