Engine and Catalyst Strategies for 1994

The medium and heavy duty diesel engine industry, alongside the engine component suppliers and petroleum industries, are working hard to develop production compatible solutions for the US 1994 model year. In this paper results are presented demonstrating how the 1994 regulations may be achieved by extensive development of the base engine. In parallel with these developments research has continued into aftertreatment systems, either as a solution in themselves or as part of a cost effective systems approach. This paper presents results demonstrating the performance characteristics of oxidation catalysts in heavy duty applications and reviews the optimisation process required to match the system to the application.