Title: Tribodynamic modeling of piston compression ring and cylinder liner conjunction in high-pressure zone of engine cycle.
Authors: Mishra, Prakash
Abstract: Piston compression ring and cylinder liner contact contributes a significant part of friction loss in an engine. Most of this loss occurs during compression and power stroke transition (i.e., between 300° to 400° crank position). It is because of the combustion gas pressure is higher in this region to enhance ring-liner contact friction. In this paper, we developed a tribodynamic model to study the transient thermoelastohydrodynamics of ring-liner contact. It takes into account the combined solution of Reynolds equation, energy equation, and elastic deformation equation considering ring-liner conformability and rheology change. We estimate the minimum film profile, friction force, and friction power loss within a high-pressure zone of a high-performance engine. Roughness of the liner is characterized using R parameter for better surface representation.
Subjects: PISTON rings; DYNAMICAL systems; HIGH pressure (Technology); FRICTION losses; PHASE transitions; COMBUSTION gases; DYNAMIC models
Publication: International Journal of Advanced Manufacturing Technology, 2013, Vol 66, Issue 5-8, p1075
ISSN: 0268-3768
Publication type: Academic Journal
DOI: 10.1007/s00170-012-4390-y

Tribodynamic modeling of piston compression ring and cylinder liner conjunction in high-pressure zone of engine cycle.

Mishra, Prakash