Fleetguard, Inc.

3m Innovative Properties Company

Cummins Filtration Ip, Inc.

Cummins Emission Solutions Inc.

Cummins Ip, Inc.

Matthew P Henrichsen

William C Haberkamp

Barry Mark Verdegan

Z Gerald Liu

Robert K Miller

Thomas Edward Wood

Thomas M Yonushonis

Elaine M Yorkgitis

Murray R Schukar

Zhongshu Tan

Randolph G Zoran

Arvind V Harinath

Kurt M A Badeau

Changsheng C Su

Bryan Ellis Blackwell

C Raymond Cheng

Matthew L Anderson

Travis E Goodlund

Roger D England

Thomas A Fosdal

Tao You

Padmanabha Reddy Ettireddy

Gene A Mullins, Jr

Mark C Allie

Steven Stokstad

Rentong Wang

Brian K Fillbach

Gary J Frank

Craig A Clayton

Douglas P Marquis

Darryl J Gust

O Michael Bowling

Kavitha Moorthy

Bryan E Blackwell

A particulate filter for use in an exhaust aftertreatment system includes a ceramic substrate and a plurality of ceramic nanofibers associated with pores of the ceramic substrate. The plurality of ceramic nanofibers may be positioned on pores of the ceramic substrate, within pore channels of the ceramic substrate, or both on pores of the ceramic substrate and within pore channels of the ceramic substrate.

Nanofiber augmented diesel particulate filters

An aftertreatment system comprises a SCR system including a catalyst formulated to decompose constituents of an exhaust gas passing therethrough. A filter is positioned upstream of the SCR system. The filter comprises a sulfur suppressing compound formulated to reduce an amount of SOx gases included in the exhaust gas flowing through the aftertreatment system. In particular embodiments, the filter comprises a filter housing and a filter element positioned within the filter housing. The filter element comprises the sulfur suppressing compound.

System and methods for reducing SOx gases in aftertreatment systems

According to one embodiment, described herein is an exhaust gas after-treatment system that is coupleable in exhaust gas stream receiving communication with an internal combustion engine. The exhaust gas after-treatment system includes a low temperature SCR catalyst configured to reduce NOin exhaust gas having a temperature below a temperature threshold. The system also includes a normal-to-high temperature SCR catalyst configured to reduce NOin exhaust gas having a temperature above the temperature threshold.

Low temperature selective catalytic reduction catalyst and associated systems and methods

Modified exhaust aftertreatment filters for filtering engine exhaust are provided as are methods of design and manufacturing modified exhaust aftertreatment filters. The modified filters are subject to reduced back pressure and reduced thermal gradients experienced during regeneration as compared to unmodified filters. The modified filters include flow-through channels obtained by unplugging channels which normally are plugged in an unmodified filter.

Tuning particulate filter performance through selective plugging and use of multiple particulate filters to reduce emissions and improve thermal robustness

An exhaust aftertreatment filter has a pre-stressed layer bonded to the filter body at the outer periphery and compressively axially pre-stressed in an opposite axial direction to separational axial tensile stress to counteract the latter during regenerative heating, to minimize separational fracture and cracking.

Exhaust aftertreatment filter with residual stress control

A filter, system and method is provided for filtering nanoparticles in a hot gas, namely particles &#x3c;about 1 micron in a gas &#x3e;about 200&#xb0; C. and further particularly &#x3e;about 450&#xb0; C. including diesel exhaust. The filter includes filter media material composed of fibrous filter media having a plurality of fibers and granular filter media having a plurality of granules extending from the surfaces of the fibers. The filter is characterized by a permeability &#x3e;about 3&#xd7;10mand an inertial resistance coefficient &#x3c;about 1&#xd7;10m. The filter captures particles in the Most Penetrating Region (MPR). A filter system includes a nanoparticle filter in series with a diesel exhaust treatment element.

High temperature nanofilter, system and method

A coating system (), winding system (), finishing system () and manufacturing system (FIGS.) is provided for spiral-wound fluted filter media ().

Filter coating, winding, finishing and manufacturing system

A method for making high temperature filter media is provided by melt-spinning a plurality of fibers of preceramic thermoplastic polymer to form a nonwoven textile web of the fibers, curing and cross-linking the thermoplastic polymer to a thermoset polymer, and thermally decomposing the thermoset polymer to ceramic. Between the melt-spinning step and the curing step, the web is formed to a filter pre-form in a green state while still pliable and malleable. The filter pre-form is cured without re-melting the thermoplastic polymer and without destroying morphology.

Melt-spun ceramic fiber filter and method

An exhaust aftertreatment filter is provided with localized and efficient heating for regeneration. Electrical and/or thermal conductors are wound with filter media sheets into a filter roll and/or conductors are provided at axial ends of the filter roll and/or microwave radiation is used for localized hot zone heating. Regeneration is provided at lateral slices of the filter roll lying in a plane extending transversely and radially relative to the filter roll axis.

Regenerable filter with localized and efficient heating

Growing community of inventors

Evansville, WI, United States of America

Matthew P Henrichsen