AM-93-74 EMISSION PERFORMANCE RELATIONSHIPS TO GASOLINE COMPOSITION FOR VEHICLES EQUIPPED WITH ELECTRICALLY HEATED CATALYTIC CONVERTERS

Description:

Recent legislation aimed at improving air quality such as the 1990 Clean Air Act Amendments and the California Low Emission Vehicle Program has focused attention on advanced emission control technologies for light-duty vehicles and the relationship between fuel properties and vehicle emission performance. With respect to gasoline composition, the Auto/Oil Air Quality Improvement Research Program has reported results detailing the effect of such fuel properties as aromatic content, olefin content, oxygen content, and sulfur levels on tailpipe emission performance for a fleet of late-model vehicles equipped with conventional emission control systems (1,2). Similar studies of fuel effects on emission performance have also been reported by independent studies conducted by oil (3-6) and auto (7,s) companies. Again these studies have focused on late-model vehicles with conventional three-way catalytic converter systems.