ミラーサイクルガソリンエンジンの平均有効圧の増加に関する研究 (<小特集>エンジンシステムの新展開)

概要

論文の詳細を見る
A Miller cycle gasoline engine has been developed by adopting the late intake-valve closing technique and the Lysholm compressor. The effectiveness of the Miller cycle depends on the reduction of compression temperature at TDC. The relation between the compression temperature and the mean effective pressure is discussed in this paper. For the reduction of compression temperature, a supercharger with high adiabatic efficiency at high pressure and an intercooler system with high cooling efficiency are essential. An optimized Lysholm compressor and a twin intercooler system have been developed for this purpose. Furthermore a twin intake system with short independent intake pipes has been adopted to make full use of late intake-valve closing potential since the conventional intake system with inertia supercharging is inadequate. The combined effect of these techniques has realized mean effective pressure 1. 5 times as high as in conventional engines with the same compression ratio of 10.
1995-10-25