Numerical analysis of the system piston-ring-cylinder of an automotive IC engine Warsaw Univ. of Technology

Format:

Book

Conference/Event

Author/Creator:

Wolff, Andrzej, author.

Conference Name:

SAE Powertrains, Fuels & Lubricants Meeting (2020-09-22 : Krakow, Poland)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2020

Summary:

A set of piston rings is used to form a dynamic gas seal betweenthe piston and cylinder wall. Many physical phenomena areassociated with the operation of the system piston-ring-cylinder(PRC), such as: inter-ring gas dynamics for the labyrinth seal,hydrodynamic lubrication and mixed friction in gaps between therings and cylinder liner, oil flow and distribution of lubricantalong the liner, twist motion of rings, liner temperature influenceon the oil viscosity. The first part of the paper presents acomprehensive model of the PRC system developed by the author.Among own models it includes several models taken from literature,like: a model of viscous oil flow between rough gap surfacesformulated by Patir and Cheng and an elastic contact model ofGreenwood and Tripp. The main parts of developed mathematicalmodel and software have been experimentally verified during aresearch period of the author at the marine engine designing centre"Wärtsilä" in Switzerland. A relatively good qualitativeand quantitative compatibility between the experimentalmeasurements and calculated results has been achieved. In contrastto the previous papers of the author concerning the piston ringpack operation of IC engines, new calculation results for anautomotive internal combustion engine have been presented. Theseresults include basic physical quantities associated with gas andoil flow processes in the PRC system for the analyzed engine. Thedeveloped model can be utilized for: evaluation of gas leakagethrough the sealing ring set, prediction of lubrication conditionsof piston rings and oil consumption, defining areas of the possiblecylinder liner wear and profile changes of piston rings slidingsurfaces, and thus can be useful for optimization of the PRC systemdesign. Key words: internal combustion engines, piston rings,gasdynamics, hydrodynamic lubrication, mixed friction

Notes:

Vendor supplied data

Publisher Number:

2020-01-2160

Access Restriction:

Restricted for use by site license