Nelson Industries, Inc.

Cummins Filtration Ip, Inc.

James Alan Debilzen

Jeffrey S Morgan

Kent Jeffrey Kallsen

Stephen L Fallon

Tadeusz Jaroszczyk

Larry T Gunderson

Zhili Gerald Liu

Jason E Dorgan

Thaddeus Alan Swor

Brad Henke

Casey Lee Severance

Z Gerald Liu

Kenneth M Tofsland

A residence time chamber and sampling apparatus for use in a system for sampling emission products from an emissions source, for example combustion engines including gasoline, diesel and natural gas engines, for subsequent measurement and analysis of the emission products. The results of the analysis can be used to formulate decisions on changes in engine design strategy, and can be used to determine the effectiveness of aftertreatment systems on the emissions source. The residence time chamber includes a plurality of isoaxial sampling probes, with a plurality of sampling trains connected to the sampling probes to take simultaneous representative emission samples for subsequent analysis. The residence time chamber minimizes many noise factors which can affect the accuracy of the test system, by applying isokinetic sampling and by reducing the interaction of the sampling gas and the particulate matter with the sampling probe inlets and with the various surfaces of the residence time chamber.

Residence time chamber and sampling apparatus

A thermophoresis-resistant dilution apparatus for dilution of gas from an emission source, such as a combustion engine, for example a gasoline, diesel or natural gas engine. The apparatus is designed to simulate atmospheric dilution, mixing and cooling processes, enabling sampled emission gas and dilution air to thoroughly mix and cool to ambient temperature, allowing some volatile and semi-volatile gas-phase organics to nucleate, condense and coagulate to their usual aerosol phase. The apparatus is designed to resist thermophorectic forces acting on the particulate matter in the sampled emission gas, thereby preventing particulate matter losses. In addition, the apparatus evenly distributes the dilution air into the sampled gas for improved mixing.

Thermophoresis-resistant gas dilution apparatus for use in emissions analysis

A filter filters fluid flowing along an axial flow direction and includes a plurality of concentric cylindrical pleated filter elements having a common axis. A plurality of annular radial gaps between filter elements provide additional flow axially through the filter, providing equalized flow and reducing restriction. In further embodiments, a central filter element is concentrically surrounded by a cylindrical pleated outer filter element and provides additional flow axially therethrough.

Multi-element cylindrical filter with equalized flow

A filter ( ) filters fluid flowing along an axial flow direction ( ) and includes a plurality of panels ( ) of pleated filter elements ( ), each filter element having a plurality of pleats defined by wall segments ( ) extending along a transverse direction ( ) between first and second sets of pleat tips at first and second sets of axially extending bend lines ( ), the transverse direction ( ) being perpendicular to the axial direction ( ). Each of the panels ( ) extends along a lateral direction ( ) perpendicular to the axial direction ( ) and perpendicular to the transverse direction ( ). The wall segments ( ) extend axially between upstream and downstream ends ( ), and define axial flow channels ( ) therebetween which are alternately sealed at the upstream and downstream ends. Transverse gaps ( ) are provided between panels and the housing at upstream and downstream ends ( ), providing additional fluid flow axially therethrough and equalized contaminant passages.

Multi-panel fluid filter with equalized contaminant passages

A vortex air precleaner having snap-fit, self-sealing vortex tubes. Each vortex tube includes a flexible lip projecting laterally outward from the tube and spaced from an end of the tube. An annular shoulder is located between the lip and the tube end and spaced from the lip to provide a groove therebetween. The portion of the tube extending from the shoulder to the tube end is tapered inwardly and is formed with a plurality of longitudinal slits to provide the tube end portion with radial flexibility. When the tube end is inserted within an opening in the wall of the precleaner, the end portion will flex inwardly enabling the precleaner wall to be engaged with the groove, and the flexible lip engages the surface of the precleaner wall to provide a tight sealed joint.

Air precleaning apparatus

Growing community of inventors

Brooklyn, WI, United States of America

James Alan Debilzen