A KNOCK INTENSITY METER BASED ON (A) KINETIC CRITERION

A new knock intensity meter is based on a criterion which correlates knock intensity and kinetic energy associated with knock-typical pressure oscillations. The instrument measures combustion chamber pressure, filters it from harmonics external to the knock frequency range in order to obtain knock pressure, and evaluates the kinetic index. The electronic chain is described. The meter functioned correctly when tested on laboratory engines and on automotive engines at high speed. Measurement problems associated with the processing of knock pressure are described in an appendix.

• Supplemental Notes:
  • Presented at the SAE Congress and Exposition, Detroit, 27 February-3 March 1978.
• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Ferraro, C V
• Publication Date: 1978

Media Info

• Features: References;
• Pagination: 14 p.

Subject/Index Terms

• TRT Terms: Combustion chambers; Engine knock; Kinetic energy; Measuring instruments; Pressure gages; Vehicle power plants
• Uncontrolled Terms: Intensity
• Old TRIS Terms: Automobile engines; Pressure sensors
• Subject Areas: Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00395153
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: SAE 780154, HS-025 309U
• Files: HSL, USDOT
• Created Date: Jun 30 1985 12:00AM