Mathematical Model of Piston Ring Sealing in Combustion Engine

Koszałka, G.; Guzik, Mirosław

doi:10.2478/pomr-2014-0043

Cited by 14 publications

(14 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In addition, mathematical description takes into account changes of gas volume regions and cross-section areas between the rings and the piston grooves (due to axial movement of the rings) [5,6,13,18].…”

Section: Model Of Gas Flow Through the Labyrinth Seal Of Piston Ringsmentioning

confidence: 99%

See 1 more Smart Citation

Influence of piston ring pack configuration on blowby and friction losses in a marine two-stroke engine

Wolff

2017

Combustion Engines

View full text Add to dashboard Cite

In the paper a comprehensive model of a piston ring pack motion on an oil film has been presented. The local thickness of the oil film can be compared to height of the combined surface roughness of a cylinder liner and piston rings. Equations describing the mixed lubrication problem based on the empirical mathematical model formulated in works of Patir, Cheng and Greenwood, Tripp have been combined and used in this paper. In addition a model of gas flow through the labyrinth seal of piston rings has been developed. The main parts of the model and software have been experimentally verified abroad by the author at the marine engine designing centre. For the selected two-stroke marine engine, the influence of the number of piston rings used and the type of the top ring lock (straight or overlapped) on blowby to piston underside and on friction losses of the piston-ring-cylinder (PRC) system have been investigated. The developed model and software can be useful for optimization of the PRC system design

show abstract

Section: Model Of Gas Flow Through the Labyrinth Seal Of Piston Ringsmentioning

confidence: 99%

“…Piston rings are important part of internal combustion engines. Commonly a set of piston rings is used to form a dynamic gas seal between the piston and cylinder wall [5,6,13]. The sliding motion of the piston forms a thin oil film between the ring land and cylinder wall, which lubricates the sliding components [2,4,11].…”

Section: Introductionmentioning

confidence: 99%

Influence of piston ring pack configuration on blowby and friction losses in a marine two-stroke engine

Wolff

2017

Combustion Engines

View full text Add to dashboard Cite

show abstract

“…The wear in the PRC assembly causes a decrease in sealing/ tightness of engine's combustion chamber [L. 3], and this in turn affects the overall efficiency and the "environmental performance" of engine operation. Mathematical models of the PRC seal can be very useful while assessing the effect of wear on this seal [L. 4,5]. These models allow one to predict changes in wear and can also be used in the prognosis of the PRC durability [L. 6].…”

Section: Introductionmentioning

confidence: 99%

Operational Evaluation of Piston-Rings-Cylinder Liner Assembly Wear in High Power Marine Diesel Engines

Adamkiewicz

Drzewieniecki

2018

Tribologia

View full text Add to dashboard Cite

This paper presents an operational evaluation of piston-piston rings-cylinder liner (PRC) assembly wear in marine diesel engines of high power. It is based on visual inspection through cylinder liner scavenge ports. Clearance measurements of piston rings in piston grooves and piston ring gap measurements were used to evaluate the extent of wear of the PRC assembly. Moreover, it is shown that piston ring gap measurements can be used as a reference parameter in wear trend analysis to predict the length of time periods between overhauls (TBO). Furthermore, it has been shown that controlling the wear of chromium (protective) layers of piston ring working surfaces by measuring their thickness with induction and eddy current methods is highly useful. They were accepted as a source of information on PRC lubrication correctness and as a symptom of its technical condition. Factors indicating the necessity of an overhaul and introducing operational methods of improving working conditions between the tribological pair – liner and piston rings have been determined.

show abstract

“…This model is an integrated model of gas flow through the apertures of the PRC system, displacement and twisting of the rings in the piston grooves and the oil film between the rings and the cylinder liner. The calculations presented in this study do not take ring twisting into account and the oil film sub-model was not employed; frictional forces between the rings and the cylinder were calculated from empirical correlations (see [19]). …”

Section: Mathematical Modelmentioning

confidence: 99%

“…The mathematical model of PRC sealing presented in [19] was used for the simulation studies. This model is an integrated model of gas flow through the apertures of the PRC system, displacement and twisting of the rings in the piston grooves and the oil film between the rings and the cylinder liner.…”

Section: Mathematical Modelmentioning

confidence: 99%

Analysis of design parameters of pistons and piston rings of a combustion engine

Koszałka

Suchecki

2017

MATEC Web Conf.

View full text Add to dashboard Cite

Abstract. This paper analyzes the effect of gaps in the lock of the first and second sealing rings and selected dimensions of the ring belt of the piston on the piston-ring-cylinder seal. The research was performed using a mathematical model of the seal system. Simulation results have shown that a significant reduction in the exhaust gas flow to the crankcase -without compromising other parameters characterizing the performance of the seal -would require increased production rigor. Reducing the blow-by without the need to narrow the tolerance intervals of the engine components is possible, but this would be accompanied by increased reverse gas flow from the inter-ring space towards the combustion chamber. The research has also shown that the ring seal of the automotive compression ignition engine, which was the starting point for testing, was optimized for minimizing gas flow towards the combustion chamber at the expense of increased flow of exhaust gases to the crankcase.

show abstract

Mathematical Model of Piston Ring Sealing in Combustion Engine

Abstract: Introduction

Cited by 14 publications

References 21 publications

Influence of piston ring pack configuration on blowby and friction losses in a marine two-stroke engine

Influence of piston ring pack configuration on blowby and friction losses in a marine two-stroke engine

Operational Evaluation of Piston-Rings-Cylinder Liner Assembly Wear in High Power Marine Diesel Engines

Analysis of design parameters of pistons and piston rings of a combustion engine

Contact Info

Product

Resources

About