Southwest Research Institute

Michael A Chadwell

Rijing Zhan

Phillip Anthony Weber

A method and system for treating exhaust emitted via an exhaust line from a diesel engine. A POC system is installed on the exhaust line, and has at least one diesel oxidation catalyst (DOC), a set of two or more particulate oxidation catalyst (POC) elements, a first differential pressure sensor (&#x394;P1) to measure the pressure difference across the first and all but the last POC elements, and a second differential pressure sensor (&#x394;P2) to measure pressure differences across the last POC element. During operation of the engine, &#x394;P1 is monitored to determine whether its POC elements require active regeneration, and &#x394;P2 is separately monitored to determine whether its (the last) POC element requires active regeneration.

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San Antonio, TX, United States of America

Michael A Chadwell