505 蓄エネルギ式可変バルブタイミングシステムによるPCI機関の運転範囲拡大(環境とエネルギー,オーガナイズドセッション)

概要

論文の詳細を見る
Homogeneous charge compression ignition (HCCI) decreases both NOx and PM. However, it is difficult to control the ignition timing. The engine operating range is limited by knocking. If the charged fuel/air mixture has a moderate inhomogeneity, oxidation reaction rate is expected to be reduced compared with homogeneous ignition. The objective of this study is to expand the HCCI operating range by early fuel injection (PCI) combined with an energy accumulated type variable valve timing (EAVVT) system. As a result, the maximum indicated mean effective pressure of PCI increased from 0.51MPa at HCCI to 0.62MPa, by optimizing the combustion phase with the EAVVT system so that the most of heat released during expansion stroke.
社団法人日本機械学会の論文
2008-09-12