CATALYST SYSTEMS DEVELOPMENT

This paper describes the results of studies on the behavior of air-fuel ratios under feedback control, the effect of air-fuel ratio modulation on three-way catalyst conversion efficiency and emission test results with and without feed back control. This report describes the governing characteristics of an air-fuel ratio control system using an EF1 engine coupled to a ZrO2 type O2 sensor and feed back loop. The conversion efficiency characteristics of a conventional three-way catalyst, using systemtically modulated air-fuel ratios, and the resultant reduction of exhaust emissions with these systematic fluctuations and limited perturbations are also defined. /GMRL/

• Supplemental Notes:
  • This paper is from Inter-Industry Emission Control, Report No. 3.
• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Kaneko, Y
  • Kobayashi, H
• Publication Date: 1977

Media Info

• Pagination: 24 p.

Subject/Index Terms

• TRT Terms: Catalysts; Economic efficiency; Exhaust gases; Feedback control; Fuel air mixtures; Modulation
• Uncontrolled Terms: Air fuel ratio; Conversion; Efficiency
• Old TRIS Terms: Fluctuation; Modulation
• Subject Areas: Economics; Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00158421
• Record Type: Publication
• Report/Paper Numbers: SAE 770197, SAE SP-414
• Files: TRIS
• Created Date: Oct 29 1977 12:00AM