KNOCK (DETONATION) CONTROL BY ENGINE COMBUSTION CHAMBER SHAPE

A reduction of engine knock intensity is demonstrated by incorporation of a stepped piston top to provide an abrupt increase in flame front area in an ASTM-CFR octane rating engine. The conclusions are based on several different types of knock measurements. Three different piston designs were tested. Decreases in the knock intensity, the magnitude of the pressure oscillations following knock, of up to 40% were realized. The statistical nature of knock is shown to be somewhat different from a normal distribution. The data have more scatter, particularly toward the high side of the mean value.

• 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:
  • Benson, G
  • Fletcher, E A
  • Murphy, T E
  • Scherrer, H C
• Publication Date: 1983

Media Info

• Features: Appendices; Figures; References;
• Pagination: 12 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: Combustion chambers; Design; Engine knock; Pistons
• Subject Areas: Design; Safety and Human Factors;

Filing Info

• Accession Number: 00378737
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: SAE 830509, HS-034 849
• Files: HSL, USDOT
• Created Date: Sep 30 1983 12:00AM