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

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.

• Record URL:
  https://doi.org/10.4271/2019-26-0144
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01487191
• Supplemental Notes:
  • Abstract reprinted with permission of SAE International.
• Authors:
  • Kodiyath, Rajesh
  • Tanaka, Hiroki
  • Nagao, Yuki
  • Watanabe, Tokuya
  • Shimizu, Haruka
  • Sato, Jun
  • Ueda, Takeshi
  • Inamura, Masaaki
  • Wakabayashi, Takashi
  • Nakahara, Yunosuke
• Conference:
  • Symposium on International Automotive Technology 2019
  • Location: Pune , India
  • Date: 2019-1-16 to 2019-1-18
• Publication Date: 2019-1-9

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Serial:
  • SAE Technical Paper
  • Publisher: Society of Automotive Engineers (SAE)
  • ISSN: 0148-7191
  • EISSN: 2688-3627
  • Serial URL: http://papers.sae.org/

Subject/Index Terms

• TRT Terms: Catalysts; Catalytic converters; Exhaust gases; Fuel injection; Nitrogen oxides; Pollutants; Selective catalytic reduction; Technological innovations
• Subject Areas: Energy; Environment; Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 01696636
• Record Type: Publication
• Source Agency: SAE International
• Report/Paper Numbers: 2019-26-0144
• Files: TRIS, SAE
• Created Date: Feb 28 2019 9:39AM