Condition Monitoring of Oil in a Single Cylinder Engine

Paper #:
  • 922291

Published:
  • 1992-10-01
Citation:
Sen, J. and VanArsdale, W., "Condition Monitoring of Oil in a Single Cylinder Engine," SAE Technical Paper 922291, 1992, https://doi.org/10.4271/922291.
Pages:
9
Abstract:
Monitoring pressure drop in an oil line has been proposed as a technique for assessing lubricant condition in an engine. This technique is evaluated using a commercial single cylinder, gasoline engine. The monitoring system consists of a differential pressure transducer and a thermocouple attached to a section of the oil line. Engine tests using single and multi-grade oils are carried out at a constant temperature (100 ± 5°C) and load (7 ± 1 N·m) over a thirty-six hour period. The pressure drop for single grade oil shows an average increase of 10% over the test period. This trend is similar for multi-grade oils over the first 20 hours. A larger rate of increase over the last 16 hours results in an average change of 50-70% by the end of the test. The corresponding change in kinematic viscosity is typically half of that for pressure drop. Differences between oils are associated with compositional changes in multi-grade formulations.
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