PERFORMANCE OF A CATALYTIC CONVERTER ON NONLEADED FUEL 690503

Catalytic converters have been combined with other emission control methods to arrive at very low emission levels. Two cars with catalytic converters successfully completed 50,000 miles on an AMA driving schedule. However, the catalyst required a nonleaded fuel for acceptable life and contained a noble metal which makes it unsuitable for large volume usage.

The search for a physically durable, chemically active, and economical catalyst, which will operate with leaded fuel, continues. In addition, durability of the catalytic converter system under the wide variety of operating conditions in customer service must be established.