Date of Award
Master of Science in Engineering
Mechanical and Aerospace Engineering
Mechanical and Aeronautical Engineering
Dr. Claudia Fajardo-Hansford
Dr. Muralidhar Ghantasala
Dr. Bade Shrestha
Masters Thesis-Open Access
Engine oil condition was quantified in a diesel engine through direct, real-time measurements of lubricant properties using an on-board oil-condition sensor. The sensor measures the lubricant temperature, density, dynamic viscosity and dielectric constant. Comparative bench-top experiments using ASTM methods or equivalent techniques validated the accuracy and precision of the lubricant property measurements from the oil-condition sensor for a specific temperature range. Bench-top experiments were also used to establish correlations between fuel contamination levels and changes in lubricant properties.
Through engine experiments, the change in the lubricant properties with respect to operating time was quantified. A correlation was found between the dielectric constant and kinematic viscosity. Specific causes for this con-elation and the change in the lubricant properties with respect to engine operating time were further investigated through bench-top oil analysis.
Clark, Ryan James, "On-Board Monitoring of Engine Oil" (2011). Master's Theses. 4824.