Patent ID: 6044644
Filing Date: 2000-04-04
Classification: B01D,B01J,F01N,F02B,Y02T

Abstract:
An article comprising:a gasoline engine having an exhaust outlet and optionally an exhaust manifold outlet;a close coupled catalyst located less than about one foot from the engine exhaust outlet or exhaust manifold outlet and in communication with the exhaust outlet to be exposed to temperatures including at least 920.degree. C., the close coupled catalyst comprising a close coupled catalyst composition having substantially no oxygen storage components selected from the group consisting of cerium components and praseodymium components, the catalyst composition comprising:a support; anda palladium component; anda downstream catalyst located downstream of and in communication with the close-coupled catalyst, the downstream catalyst comprising an oxygen storage component selected from the group consisting of cerium components and praseodymium components.