Gm Global Technolgoy Operations, Inc.

Brunswick Corporation

Kasser A Jaffri

David Brian Brown

Rahul Mital

Kevin Berent Fuqua

Andrew J Przybyl

Jianwen Li

Ronald L Hall

William R Robertson

Michael Christopher Luckham

Linda Garcia

Mark A Frank

A method and system for monitoring a three-way catalyst cooled by a coolant and treating internal combustion engine exhaust by oxidizing HC and CO and reducing NOis provided to prevent false-fail monitoring. An initial lean kick excursion of fuel-air ratio Phi is provided prior to the first reducing step or interval of the first cycle.

Lean kick catalyst monitoring system

A particulate matter (PM) filter assembly includes a PM filter that filters PM from an exhaust stream and that includes an entry face facing a first direction of flow of the exhaust stream, and a swirl element disposed in the exhaust stream and that includes a blade that directs a portion of the exhaust stream in a second direction of flow that is different than the first direction of flow. The blade directs the portion of the exhaust stream to distribute the exhaust stream over a frontal area of the entry face of the PM filter. A related method of filtering particulate matter from an exhaust stream is also provided.

Particulate matter filter assembly with a flow device

A mixing apparatus mountable within a generally cylindrical passage defined by an exhaust gas conduit of an exhaust gas after-treatment system is provided. The passage includes an outer region and an inner region operable to convey an exhaust stream and a liquid stream, such as a urea stream. The mixing apparatus includes a retainer ring operable to retain the mixing apparatus within the passage. A first plurality of fins extends from the retainer ring and is operable to impart a rotational velocity component in a first direction to the exhaust stream and urea stream in the outer region of the passage. A second plurality of fins extends from the retainer ring and is operable to impart a rotational velocity component in a second direction, opposite the first direction, to the exhaust stream and urea stream in the inner region of the passage.

Mixing apparatus for an exhaust after-treatment system

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Rochester, MI, United States of America

Kasser A Jaffri