EMISSIONS DURING WARMUP PERIOD STUDIED

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.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/2240909
• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Publication Date: 1980-5

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

• TRT Terms: Catalysts; Exhaust gases; Fuel air mixtures; Fuel conservation; Internal combustion engines; Temperature; Vehicle power plants
• Uncontrolled Terms: Air fuel ratio
• Old TRIS Terms: Automobile engines
• Subject Areas: Energy; Highways; Vehicles and Equipment;

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