Browse Publications Technical Papers 2019-26-0144

Controlled Distribution of PGM in Transversal and Vertical Direction of Washcoat; New Approach for Targeting Emission at Cold Start and High Speed Region 2019-26-0144

We have developed a new technology with which we are able to control PGM distribution two-dimensionally along transversal and vertical direction. Vehicle evaluation using naturally aspirated engine suggested that the newly developed catalyst with two-dimensionally controlled Pd distribution shows an improvement of 8% for NMHC and 15% for NOx emissions compared to conventional zone coated catalyst. In addition, the Pd distribution in front zone was further optimized based on the results of light-off tests. Catalyst with three zones shows clear improvement in purification of NMHC at cold start. The higher purification of newly developed catalysts could be attributed to controlled distribution of PGM along transversal and vertical direction which results in deposition of higher amount of PGM at higher temperature region of the catalyst and efficient interactions of exhaust gases and PGM sites.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.

Due to current capacity constraints, printed versions of our publications - including standards, technical papers, EDGE Reports, scholarly journal articles, books, and paint chips - may experience shipping delays of up to four to six weeks. We apologize for any inconvenience.
We also recommend:

Chemical and Physical Characteristics of Organic Particulate Matter from Exhaust After-Treatment System of Euro 6 Diesel Engine Operating at Full Load


View Details


Influence of the Space Between Monoliths and the Geometry of Endcones on the Conversion Rate of a Catalytic Converter


View Details


Development of Second-by-Second Fuel Use and Emissions Models Based on an Early 1990s Composite Car


View Details