Oil Rheology Adjacent to the Scraper Ring of a Diesel Engine

Abstract

Several recent experiments have been made to determine lubricant flow patterns in engine journal bearings. A laser fluorescence technique allows accurate data collection of the oil film thickness on the ring pack of a production diesel engine. The data collected from the Kubota EA300N IDI engine consisted of five different types of lubricant--two single-grades, two multi- grades, and a synthetic multi grade. The data was analyzed and it was found that while oil cross-flow circumferentially around the scraper ring is not present in fired cases, it is present in the motored cases. In addition, oil flow under the ring was evaluated with results consistent with previous observations and the flows observed suggest that the oil flow is between the ring and liner. Finally, a model for upstrokes that predicts the inlet wetting height for varying ring load was evaluated with positive results.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1991
Accession Number
ADA245263

Entities

People

  • Dennis C. Logan

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Computer Programs
  • Computers
  • Cross Flow
  • Data Analysis
  • Data Sets
  • Databases
  • Diesel Engines
  • Engineering
  • Equations
  • Experimental Data
  • Flow Rate
  • Lubricants
  • Marine Engineering
  • Measurement
  • Mechanical Engineering
  • Naval Architecture
  • Rate Of Consumption

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Petroleum Engineering

Technology Areas

  • Directed Energy