Impact Analysis of the Key Engine Parameters on Piston Lubrication and Friction Performance in Diesel Engines Using GT-SUITE Program

Abstract

In Compression ignition engines combustion occurs at higher temperatures that leads to a rapid rise in combustion pressure and amount of heat released. This may lead to lesser emissions during engine cycle. Moreover, occurrence of combustion takes place for a very small crank angles duration resulting in better thermal efficiency. On the other hand, the oil used for lubrication in IC engines is responsible for a significant amount of pollution and particles emitted into the environment. In order to comply with increasingly strict pollution standards, manufacturers make considerable efforts to minimize the impact of oil consumption on engine emissions. The purpose of this study is to develop a one dimensional numerical simulation method using GT-Suite software to assess how the engine speed and load affect the oil film thickness, frictional force, and power losses during the operating engine cycle. The results obtained in this simulation were validated using experimental data, and there is good agreement between the numerical and experimental results. It was found in this paper that the maximum friction power losses were found to be 1.6 kW at middle of strokes and the minimum Oil film thickness was obtained in range of 9-38 μm.