Gm Global Technolgoy Operations, Inc.

Fleetguard, Inc.

Other

Johnson Matthey Public Limited Company

Rahul Mital

Jianwen Li

David Brian Brown

Bradlee J Stroia

Luciano Nunziato Di Perna

Robert C Yu

Shouxian Ren

Anil Yadav

James B Rodgers

Gongshin Qi

Michael J Cunningham

Rebecca J Darr

Chijou Wang

Scott Cole

Chang H Kim

Paul Jasinkiewicz

Raffaello Ardanese

Vincent J Tylutki

Chad E Marlett

Charles E Dean

Kevin Berent Fuqua

Michael Christopher Luckham

Kasser A Jaffri

Amit Prabhakar

Michael J Paratore, Jr

Wei Ping Li

Chang Han Kim

Igor Anilovich

Steven Jeffrey Schmieg

Charles Solbrig

David A Brown

Yongsheng He

Eric Darvin Thomas

Justin Adam Shetney

Thomas LaRose, Jr

Jason Daniel Mullins

Joshua Clifford Bedford

Michelle H Wiebenga

Jong H Lee

Claudio Ciaravino

Roberto Argolini

Michael V Taylor

John A Catalogna

Bryan D Axe

Penelope Markatou

Andrea De Filippo

Ceren Aydin

Anirban Sett

Prashant Kumar Mishra

Matthew J Myers

Thomas E Wiseman

Linda Garcia

Daryl J D'Andrea

Bilal A Rathur

Asif Iqbal Siddiqui

Thomas J Sobtzak

Shyancherng C Huang

James R Ireton, Jr

Mike Nagel

Patrick Bannon

Dennis Murray

Methods and systems related to an exhaust gas treatment system including, in order:

Exhaust gas treatment system

A battery outgassing filter system is provided. The system includes a battery cell, an external casing encapsulating the battery cell and including a casing vent, and an outgassing filter disposed upon the casing vent and including a filter element including a first filter element portion operable to contain a first size of particulate matter and a second filter element portion operable to contain a second size of particulate matter relatively smaller than the first size of particulate matter.

Battery outgassing filter system and method to filter outgassing from a battery cell

A system to mitigate diesel exhaust fluid deposits in vehicle exhaust system flexible couplings includes a diesel exhaust pipeline. A diesel exhaust fluid injector is connected to the diesel exhaust pipeline to inject a diesel exhaust fluid into the diesel exhaust pipeline. A flexible coupling is connected to the diesel exhaust pipeline. A diesel exhaust fluid collection device is positioned in the diesel exhaust pipeline between a connection location into the diesel exhaust pipeline of the diesel exhaust fluid injector and the flexible coupling. The diesel exhaust fluid collection device includes a liquid diesel exhaust fluid collection volume where an un-vaporized portion of the diesel exhaust fluid is collected.

System and apparatus to mitigate diesel exhaust fluid deposits in exhaust system flexible couplings

Internal combustion engine (ICE) exhaust gas treatment systems include the ICE having one or more cylinders configured to receive a mixture of air and fuel defined by an air to fuel ratio (AFR) for combustion therein, a control module configured to control the AFR, a diesel oxidation catalyst (DOC) configured to receive exhaust gas generated by the ICE and oxidize NOx species within the exhaust gas, and a selective catalytic reduction device (SCR) configured to receive exhaust gas from the DOC. Methods for operating and diagnosing such systems include determining, via the control module, a baseline value of a SCR performance parameter which is unsuitable, changing, via the control module, the AFR to change the DOC outlet NO2:NOx ratio, subsequently assessing a second value of the SCR performance parameter, and implementing a control action based on the second value of the SCR performance parameter.

Methods for operating and diagnosing internal combustion engine exhaust gas treatment systems

Methods for monitoring and/or regenerating a selective catalytic reduction particulate filter (SCRF) are provided. The SCRF comprises a porous filter substrate and a catalytic composition capable of reducing NOx applied thereto. Methods include determining a SCRF pressure differential (dP) and determining the SCRF soot loading using a 1st SCRF dP map if the SCRF has not been degreened, or a 2nd SCRF dP map if the SCRF has been degreened. The SCRF has been degreened if one or more of a degreening cumulative time and temperature threshold has been achieved and a filter regeneration count threshold has been achieved. The 1st and 2nd SCRF dP maps correlate SCRF dP and one or more of SCRF temperature, exhaust mass flow, and exhaust volumetric flow to a SCRF soot loading. The method can optionally further include initiating a filter regeneration if the determined SCRF soot loading is above a soot loading threshold.

Methods for monitoring and regenerating selective catalytic reduction filter devices

Described herein is a desulfurization method for desulfurizing a SCR device treating an exhaust gas. The desulfurization method includes injecting a reductant into the exhaust gas upstream from or into the SCR device and increasing a temperature of the exhaust gas.

Method for desulfurization of selective catalytic reduction devices

An exhaust gas treatment system includes a selective catalytic reduction device (SCR); a reductant injector upstream from the SCR and configured to communicate reductant into the SCR via a conduit defined by an outer periphery, a first mixer disposed within the conduit upstream from the reductant injector, and a second mixer disposed within the conduit downstream from the reductant injector and upstream from the SCR. Each of the first mixer and the second mixer comprises a plurality of blades extending between a center region of the conduit to the conduit periphery, wherein each of the blades at least partially obstructs fluid flow through the conduit and are angled relative to a cross sectional plane of the conduit such that fluid flow is permitted between adjacent blades, and the plurality of blades form a turbulence plane defined by a plane angle measured from the two outermost blades of the turbulence plane.

Exhaust gas treatment systems utilizing a plurality of reduced-resistance mixers

Selective catalytic reduction filter (SCRF) devices and systems incorporating the same are provided. Systems can include an exhaust gas source, an exhaust gas conduit capable of receiving an exhaust gas stream from the exhaust gas source, and an SCRF device in fluid communication therewith. The SCRF device can include a filter, a selective catalytic reduction (SCR) catalyst disposed on at least portion of the filter, and a NOstorage coating on at least a portion of the filter. The NOstorage coating can include one or more of palladium, barium, or cerium. The NOstorage coating can be biased towards the upstream side of the filter. The NOstorage coating can overlap a portion of the SCR catalyst. The system can further include a water-absorbing alkali oxide. The water-absorbing alkali oxide can be disposed within the SCRF device, the exhaust gas conduit, or in an upstream oxidation catalyst device.

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An exhaust gas treatment device includes a housing having a wall. The wall of the housing defines an interior chamber. A substrate is supported by the housing within the interior chamber of the housing. The substrate extends along a longitudinal axis. The substrate includes a flow through structure that allows the flow of exhaust gas to flow through the substrate. The substrate includes a catalytic composition disposed thereon for reacting with the flow of exhaust gas. The substrate includes a cavity, extending along a cavity axis, which is transverse to the longitudinal axis of the substrate. A sensor is attached to the housing. The sensor includes a probe that at least partially extends into the cavity of the substrate, for sensing a gaseous component in the flow of exhaust gas. The cavity mixes the flow of exhaust gas and directs the exhaust gas toward the probe of the sensor.

Exhaust gas treatment device having integrated gas sampling sensor

Selective catalytic reduction filter (SCRF) devices and systems incorporating the same are provided. Systems can include an exhaust gas source, an exhaust gas conduit capable of receiving an exhaust gas stream from the exhaust gas source, and an SCRF device in fluid communication therewith. The SCRF device can include a filter, a selective catalytic reduction (SCR) catalyst disposed on at least portion of the filter, and a soot oxidizing catalyst (SOC) material disposed on at least a portion of one or more of the filter and the SCR catalyst. The SOC material can include one or more transition metal oxides, excluding platinum group metals. The SOC material can include one or more of a titanium oxide, an iron oxide, a tungsten oxide, a cerium oxide, and acidic zirconia. The SOC material can be in amorphous form. The SOC material can be biased towards to the upstream side of the filter.

Soot oxidation catalyst materials and selective catalytic reduction filter devices incorporating the same

A method is disclosed of providing a fuel efficient regeneration of an exhaust after-treatment (AT) system that includes a lean oxides of nitrogen (NO) trap (LNT) and a selective catalytic reduction filter (SCRF) positioned downstream of the LNT. The method includes regulating a selectable position valve. The valve permits a first gas flow portion to pass through the LNT and diverts a remaining second portion of exhaust gas flow from a first passage connecting an engine and the AT system to a second exhaust passage to thereby bypass the LNT. The method also includes regulating a first device to inject fuel into the first portion of the exhaust gas flow. The injection of fuel in to the first portion of the exhaust gas flow provides fuel efficient regeneration of the LNT and promotes NOconversion and ammonia (NH) formation in the LNT. A system employing the method is also disclosed.

A snorkel assembly for reading optimization of a sensor, wherein the snorkel assembly may be configured to be positioned around and spaced apart from the sensor. The snorkel assembly may include an upstream side and a downstream side. The snorkel assembly may include a cup section and a tube section extending from the cup section. The tube section may include an inlet opening on the upstream side of the snorkel assembly. The cup section may include an exhaust opening on the downstream side of the snorkel assembly.

Plug-in NOx sensor snorkel for reading optimization under packaging constraints

A method for diagnosing an Oxidation Catalyst (OC) device of an exhaust gas treatment system is provided. The method monitors a differential temperature across the OC device. The method determines whether the differential temperature reveals a temperature spike. The method determines that the OC device operates properly in response to determining that the differential temperature reveals a temperature spike.

Diagnosing oxidation catalyst device with hydrocarbon storage

An engine exhaust system includes an exhaust pipe assembly having an engine exhaust system inlet configured to receive engine exhaust and an engine exhaust system outlet. The system includes a first selective catalytic reduction (SCR) catalyst device positioned downstream in exhaust flow from the engine exhaust system inlet. The first SCR catalyst device includes a substrate with a metallic catalyst coated on the substrate. An electric heater is configured to heat the metallic catalyst. A second SCR catalyst device is positioned downstream in engine exhaust flow from the first SCR catalyst device and upstream of the engine exhaust system outlet. The first SCR catalyst device and the exhaust pipe assembly define an empty chamber between the substrate and the second SCR catalyst device. Engine exhaust flows directly from the substrate to the second SCR catalyst device through the empty chamber.

Engine exhaust system

A SCR device includes a substrate having a first portion, and a second portion disposed downstream of the first portion. The first portion of the substrate includes a volume that is between 15% and 25% of a total volume of the substrate. A first selective catalytic reduction compound is disposed on the first portion of the substrate, and includes an iron zeolite (Fe-Zeolite) compound. A second selective catalytic reduction compound is disposed on the second portion of the substrate, and includes a copper (Cu) SAPO-34 compound. The copper SAPO-34 compound includes a catalyst density of less than 2.74 mg copper per cubic centimeter of copper SAPO-34 compound. The copper SAPO-34 compound is applied onto the second portion of the substrate at a compound density of less than 110 g of copper SAPO-34 compound per liter of volume of the second portion of the substrate.

Selective catalytic reduction device

Growing community of inventors

Rochester Hills, MI, United States of America

Rahul Mital