ANALYSIS OF HYDROCARBON EMISSIONS MECHANISMS IN A DIRECT INJECTION SPARK-IGNITION ENGINE

The direct injection spark-ignition engine is the only internal combustion engine with the potential to equal the efficiency of the diesel and to tolerate a wide range of fuel types and fuel qualities without deterioration of performance. However, this engine has low combustion efficiency and excessive hydrocarbon emissions when operating at light load. In this paper, potential sources of hydrocarbon emissions during light load operation are postulated and analyzed. The placement of fuel away from the primary combustion process in conjunction with a lack of secondary burnup are isolated as important hydrocarbon emissions mechanisms. Analyses show that increasing cylinder gas temperatures can improve secondary burnup of fuel which would reduce hydrocarbon emissions. Practical means to achieve this include higher compression ratio and use of ceramic parts in the combustion chamber.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01487191
• Supplemental Notes:
  • International Congress and Exposition, Detroit, Michigan, February 28-March 4, 1983.
• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Giovanetti, A J
  • Ekchian, J A
  • Heywood, J B
  • Fort, E F
• Publication Date: 1983

Media Info

• Features: Figures; References; Tables;
• Pagination: 23 p.
• 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: Ceramic materials; Combustion chambers; Compression; Exhaust gases; Hydrocarbons; Reduction (Chemistry); Spark ignition engines
• Old TRIS Terms: Compression ratio; Reduction
• Subject Areas: Safety and Human Factors;

Filing Info

• Accession Number: 00377933
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: SAE 830587, HS-034 649
• Files: HSL, USDOT
• Created Date: Sep 30 1983 12:00AM