Next level of passenger vehicles engines evolution is needed to comply with fuel economy and pollutant regulation legislative requirements. Turning a combustion engine with modern control systems into reverse uniflow two-stroke engines improves the power density of the engine and minimizes negative aspects of using the classic two-stroke engines. Variable valve timing allows control of the inta...

En genel tanımıyla baga (supap yuvası), içten yanmalı motorlarda silindir başlığında bulunan, supap oturma yüzeyiyle temas ederek sızdırmazlık sağlayan önemli bir motor bileşenidir. Hem egzoz hem de emme supaplarının işlevini doğru şekilde yapabilmesi için bagaların da kusursuz çalışması gerekir. Supap ve baganın yüzeylerinde meydana gelecek hasar çalışma performansını etkilemektedir. Ağır yük ...

Air path control of a spark ignition engine without an EGR loop, equipped with variable-valve-timing (VVT) actuators, is addressed in this paper. VVT devices are used to produce internal exhaust gas recirculation, providing beneficial effects in terms of fuel consumption and pollutant emissions reduction. However, VVT actuators affect the fresh air charge in the cylinders. This has an impact on...

The limited fossil fuel resources along with the increased public concerns about pollution levels have increased the need for alternative fuels for use in internal combustion engines. This study is to investigate the variation of the engine performance and exhaust emissions of a spark ignition engine. A spark ignition engine running with gasoline and gasoline blended E5, E10 and E20. Effects of...

The noise levels generated by an unmuffled engine exhaust system can be identified as the loudest vehicle source. muffler or silencer is essential component of internal combustion system. Its main function to reduce exhaust-generated acceptably low level. design development a complex process affecting efficiency and thus fuel consumption, emissions overall generation. This paper focuses on for ...