THE BEHAVIOUR OF AGED THREE-WAY CATALYTIC CONVERTERS IN THE DIFFERENT MODES OF LEGISLATED CYCLES

Automotive 3-way catalytic converters (CCs) are routinely applied in the elimination of carbon monoxide, unburned/partially burned hydrocarbons, and nitrogen oxides from gasoline engine exhaust gases. Catalyst activity in this case is only indirectly assessed by means of the measurement of overall emissions during a legislated driving cycle. The specific structure of the driving cycles embodied in a legislated emissions test procedure greatly affects catalyst performance. Catalyst behavior is also affected by level of raw engine emissions and catalyst inlet temperatures. The latter are strongly influenced by exhaust system design. The above easily explain the difficulties arising when discrimination between the behavior of different catalysts in a specific test procedure is called for. The advent of reliable mathematical models of 3-way CC operation allows for a detailed analysis of catalyst performance over the full legislated cycle, providing more insight into the catalytic activity itself. In this paper, a specific experimental and computational case study is employed to demonstrate the role of mathematical modeling in the detailed analysis of aged catalyst performance during U.S. and European Union legislated test procedures.

  • Corporate Authors:

    Wiley (John) & Sons, Limited

    Baffins Lane
    Chichester, Sussex  England 
  • Authors:
    • KANDYLAS, I P
    • Stamatelos, A M
  • Publication Date: 2000-4

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00798698
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 10 2000 12:00AM