In-cylinder exhaust gas recirculation (EGR) stratification, generally achieved by supplying EGR asymmetrically into intake ports on a four-valve diesel engine, is sensitive to trapped exhaust gas in the intake manifold and intake ports that is caused by the continuous supply of EGR during the valve-close periods of the intake valves. The subject of this study is to evaluate the distribution of ...

A &etroke-cycle test engine was equipped m“th a glass cylinder an-d the air rnocements within it were studied wht% the engine was being motored. Dij$erent typee of air @w were produced by ueing shrouded intake valves in various arrangements and by altering the 8hape of the intake4r pawage in the qdinder head. The air movement8 were made visible by miz-ingfeather8 with the entering air, and high...

The friction pair of piston rings and cylinder liner is one of the most important friction couplings in an internal combustion engine. It influences engine efficiency and service life. Under the excitation of piston slaps, the dynamic deformation of cylinder liner is close to the surface roughness magnitudes, which can affect the friction and lubrication performance between the piston rings and...

Diesel engines have been widely used in various engineering applications. The performance of diesel engines is influenced greatly by the operation condition of the cylinder liner-piston ring. It is therefore crucial to investigate and assess the working condition of the cylinder liner-piston ring. Literature review indicated that there are few studies on this issue. Therefore, this study propos...

Various methods are proposed in literature for the engine faults detection, based on the combination of simulation models with measured engine data. In order to be effective, these methods must be based, in author’s opinion, on detailed, reliable and validated simulation models, able to predict the faulty engine performance, by reproducing its actual work conditions. This is particularly import...

loading conditions and complex geometry have led the cylinder heads to become the most challenging parts of diesel engines. one of the most important durability problems in diesel engines is due to the cracks valves bridge area. the purpose of this study is a thermo-mechanical analysis of cylinder heads of diesel engines using a two-layer viscoplasticity model. in this article, mechanical prope...

in this paper, a numerical study is performed to provide the combustion and emission characteristics resulting from fuel-reactivity controlled compression ignition (rcci) combustion mode in a heavy-duty, single-cylinder diesel engine with gasoline and diesel fuels. in rcci strategy in-cylinder fuel blending is used to develop fuel reactivity gradients in the combustion chamber that result in a ...

The requirement for the advancement of internal combustion (IC) engines and enhance methods cycle is increasing day by day. four-stroke engine extensively used due to better fuel economy less exhaust smoke. However, major drawback includes a considerable amount extra heat energy generation that directly adds up waste energy. In order overcome limitation, idea computing two strokes in utilize ha...

The development of statistical analysis has played an important part in studying large data that captured from engine block as apart of engine monitoring and diagnose . Within this paper the application of statistical analysis was introduced by utilizing Kurtosis, I-kaz coefficient, and Crest Factor and Skewness parameter. There is potential that these statistical parameters could serve as patt...