"SP-537." "International Congress & Exposition, Detroit, Michigan, February 28-March 4, 1983"--Cover.

The first group of papers summarizes the state of the art in trap oxidizer development by those vendor firms most advanced in this technology. Discussed are ceramic wall flow filters, with and without catalysts, catalyzed metal meshes and ceramic foam. The second part of this publication presents the auto makers' experience with adapting trap oxidizers to vehicles. Both laboratory and over-the-road vehicle tests are described. The third segment of this publication includes a mix of related subjects. One important contribution is a cost/benefit analysis of the job of preventing particulate matter from getting into the environment. A successful field trial of the ceramic filter in an underground mine lends encouragement to a very important off-road application. Included also are a theoretical treatment of a regenerative process, the effect of residual matter on the long term durability of a trap, and an innovative method of particulate measurement. Again, the critical subject of trap regeneration is key throughout.