Piston and Ring Assembly Friction Studies in Cummins 903 Engine

Abstract

Piston and ring assembly friction has been measured in a single cylinder Cummins 903 diesel. The engine was motored and fired, cooled and uncooled. For uncooled operation, plasma sprayed chromium oxide ring and liner coatings were employed with a synthetic lubricant. The Instantaneous IMEP and Fixed Sleeve methods were used for the friction measurement on a crank angle by a crank angle basis, with a cycle average of about 1.5 to 4 psi fmep. Considerable effort was expended in developing the measurement techniques, with a major effort on the Instantaneous IMEP method. In a parallel effort a bench type, heated, piston ring and liner wear simulator was developed. This permitted rapid screening of promising candidate materials for uncooled engine tests. The plasma sprayed chromium oxide coatings were found to be best.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1989
Accession Number
ADA233072

Entities

People

  • Donald J. Patterson
  • George B. Schwartz
  • Kevin M. Morrison

Organizations

  • University of Michigan

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Ceramic Coatings
  • Ceramic Materials
  • Connecting Rods
  • Data Acquisition
  • Friction
  • Gages
  • Heat Engines
  • Internal Combustion Engines
  • Measurement
  • Piston Rings
  • Pressure Measurement
  • Pressure Transducers
  • Simulators
  • Strain Gages
  • Synthetic Oils
  • Test Equipment
  • Transducers

Readers

  • Petroleum Engineering
  • Surface Engineering/Surface Coating Technology.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).