Engine oil consumption is an important source of hydrocarbon and particulate emissions in modem automobile engines. Great efforts have been made by automotive manufacturers to minimize the impact of oil consumption on engine emissions. Research engineers in the last decade have been trying to study the sources and driving mechanism of oil consumption. In contrast to oil consumption mechanisms i...

increase of environmental pollution and restricted emission legislations have forced companies to produce automobiles with lower air pollutants. in this respect, discharge of blowby gases into the environment has been prohibited and their recirculation into the combustion chamber is proposed as an alternative solution. in addition, using egr technique to control and reduce nitrogen oxides in in...

Interring gas dynamic analysis of piston in a diesel engine considering the thermal effect. Understanding the interaction between ring dynamics and gas transport in ring pack systems is crucial and needs to be imperatively studied. The present work features detailed interring gas dynamics of piston ring pack behavior in internal combustion engines. The model is developed for a ring pack with fo...

A piston-rings-cylinder (PRC) assembly determines the blowby, engine oil consumption, and friction wear processes accompanying system's operation. Thus, it is crucial for whole IC efficiency lifetime. lot of research effort put into increasing performance this complex highly dynamic system. Advanced, comprehensive models play an important role in understanding improving PRC In presented work, e...

using the gaussian 2003 software and mp2/ 6–311 ++ g** method for he: he, ne:ne andmp2/6-31g method for ar: ar, kr: kr and hf/sto-3g method for xe: xe, the optimizedinteraction energies between two like atoms of rare gases (he, ne, ar, kr and xe) as a functionof the distances between the centers of two considered atoms were evaluated and the resultswere interpreted according to the lennard – jo...

In this study a coupled thermodynamics and crankshaft dynamics model of large two-stroke diesel engine was utilised, to map the relationship Instantaneous Crankshaft Torque (ICT) with following frequently occurring malfunctioning conditions: (a) change in Start Injection (SOI), (b) Rate Heat Release (RHR), (c) scavenge air pressure, (d) blowby. This performed using frequency analysis on ICT, wh...