Development of catalysts for diesel particulate NO_x reduction

摘要

While diesel vehicles feature high fuel economy with low CO_2 emissions,further suppression of particulate matter(PM)and NO_x in the exhaust stream is demanded worldwide.We have been working to develop a new diesel particulate-NO_x reduction(DPNR)system to decrease both PM and NO_x emissions by combining the NO-x storage-reduction catalyst for direct injection gasoline engines with the most advanced engine control technologies.This paper describes the development of the DPNR system,a post-treatment technology for PM and NO_x,which was achieved through a combination of catalysis and engine control technologies.