A three-dimensional (3D) model for piston ring-pack dynamics and blow-by gas flow was developed to enable more in-depth analyses of the ring-pack performance. This model predicts the 3D dynamic behavior of compression rings and twin-land oil control ring due to the ring’s non-axisymmetric properties, bore distortion and piston secondary motion. Finite element beam theory is used for ring structure calculation. Gas flows along the axial and circumferential directions of the power cylinder system are resolved simultaneously with the ring dynamics. The model was applied to a heavy-duty diesel engine. Particular emphasis was placed on the dynamics of keystone type of top ring, and the stability of the second ring with a twist chamfer and twin-land oil control ring under the influence of piston secondary motion. The variations of the gas pressure and ring dynamic behavior along the circumference are discussed.
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ASME 2004 Internal Combustion Engine Division Fall Technical Conference
October 24–27, 2004
Long Beach, California, USA
Conference Sponsors:
- Internal Combustion Engine Division
ISBN:
0-7918-3746-7
PROCEEDINGS PAPER
A Three-Dimensional Model for Piston Ring-Pack Dynamics and Blow-By Gas Flow
Liang Liu
Massachusetts Institute of Technology, Cambridge, MA
Tian Tian
Massachusetts Institute of Technology, Cambridge, MA
Paper No:
ICEF2004-0968, pp. 639-649; 11 pages
Published Online:
December 11, 2008
Citation
Liu, L, & Tian, T. "A Three-Dimensional Model for Piston Ring-Pack Dynamics and Blow-By Gas Flow." Proceedings of the ASME 2004 Internal Combustion Engine Division Fall Technical Conference. ASME 2004 Internal Combustion Engine Division Fall Technical Conference. Long Beach, California, USA. October 24–27, 2004. pp. 639-649. ASME. https://doi.org/10.1115/ICEF2004-0968
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