Ionization in the Knock Zone of an Internal Combustion Engine

Abstract

Test were conducted with C.F.R. single-cylinder engine operated at 2000 rpm with a compression ratio of 7, spark advance of 30 degrees, and fuel-air ratio of 0.075. The suspected correlation between knock intensity and degree of ionization was verified. An oscillation in degree of ionization corresponding in frequency to the knock vibrations in the cylinder pressure was observed. Fuel, throttle setting, and mixture temperature were varied. Knock shortens the duration of ionization, and type of fuel affects the degree of ionization.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1940
Accession Number
ADB814397

Entities

People

  • Charles E. Hastings

Organizations

  • National Advisory Committee for Aeronautics

Tags

DTIC Thesaurus Topics

  • Aeronautical Laboratories
  • Aeronautics
  • Chemical Reactions
  • Combustion
  • Compression Ratio
  • Engines
  • Exothermic Reactions
  • Frequency
  • Fuels
  • Ignition
  • Intensity
  • Internal Combustion Engines
  • Ionization
  • Knocking
  • Oscillation
  • Spark Plugs
  • Vibration

Readers

  • Combustion and Flow Dynamics.
  • Petroleum Engineering
  • Space/Atmospheric Physics.