Engelhard Corporation

Alexander Gorel

Joseph Charles Dettling

Stanley Allen Roth

Kenneth Edwin Voss

Gary Wayne Rice

John Lawrence Calabrese

Yiu Kwan Lui

Ramesh M Kakwani

The present invention relates to a method and article for treating a diesel engine exhaust stream. The stream is contacted with an upstream catalytic composition having a cerium component and/or a zeolite component to reduce the quantity and amount of the particulate matter in the exhaust stream. The stream passes from the upstream catalytic composition to a particulate filter located downstream from the upstream catalytic composition.

Diesel oxidation catalyst

A low pressure EGR system suitable for use as a passive retrofit system is disclosed for moving vehicles equipped with a diesel engine. The EGR loop inlet is positioned upstream of the exhaust particulate filter and downstream of the turbine to utilize backpressure created by the exhaust particulate filter to insure EGR flow in the loop. A catalyzed soot filter in communication with the EGR pickup insures cleansed EGR gases at the EGR return downstream of the air filter and upstream of the compressor. A corrugated EGR line provides cooling of the EGR gases.

Low pressure EGR system for diesel engines

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Hillsborough, NJ, United States of America

Alexander Gorel