Comparison of Measured and Theoretical Inter-Ring Gas Pressure on a Diesel Engine

Paper #:
  • 961909

Published:
  • 1996-10-01
Citation:
Richardson, D., "Comparison of Measured and Theoretical Inter-Ring Gas Pressure on a Diesel Engine," SAE Technical Paper 961909, 1996, https://doi.org/10.4271/961909.
Pages:
16
Abstract:
Inter-ring gas pressure and piston ring motion are considered important for the control of oil consumption, particulate emissions, and reduced friction. For this reason, inter-ring gas pressure was measured on a diesel engine. Two different ring pack configurations were tested (positive and negative twist second rings). A significant difference in measured inter-ring pressure was observed. The measurements were compared to the predictions of a cylinder kit model with favorable results. Predictions showed that the observed difference between measured inter-ring pressures is caused by a significant difference in ring motion. The reasons for these differences are explained in this paper.
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