A General Motors Research study of the effects of air-fuel ratio and spark advance on exhaust emission, and of the reasons for observed emission differences, indicates, for example, that: during engine warmup on the Federal Test Procedure, engine A/F ratio should be held in the 14.5-16.0 range as soon as possible after startup, within constraints of acceptable driveability. Within the ranges studied, time required to attain catalyst reaction temperature is not measurably affected by A/F ratio.

Media Info

  • Pagination: p. 87-93
  • Serial:
    • Automotive Engineering
    • Volume: 88
    • Issue Number: 5
    • Publisher: Society of Automotive Engineers (SAE)
    • ISSN: 0098-2571

Subject/Index Terms

Filing Info

  • Accession Number: 00325158
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: HS-029 034
  • Files: TRIS
  • Created Date: Aug 15 1981 12:00AM