밀러사이클 적용 HEV 엔진 실린더의 가변흡기밸브 닫힘각에 따른 실린더내 유동해석

초록

For reduction of CO2 emission emitted from combustion engine, the developed nations have been focused onR&D of hybrid electric vehicle. Further more, many automobile companies are researching on various techniquesrelated to engine used in HEV to enhance fuel economy. One of key techniques is miller cycle that control a valvetiming to reduce compression stroke for saving energy and increase expansion stroke for high power. In this study,it was investigated the in-cylinder flow characteristics of miller cycle with variable intake valve timing by usingthe ANSYS simulation code. For simulation, the key analytic parameter defined as intake valve closing timing andcam profile. As main results, it was shown that LIVC cause a lower pressure inside cylinder and had better controlturbulence intensity.

키워드