Investigation of Gas Exchange Process on a Highly-Intensified Single Cylinder Diesel Engine with Late Intake Valve Closing Miller Cycle

Abstract Late intake valve closing (LIVC) Miller cycle was used on a highly-intensified single cylinder diesel engine to reduce the maximum combustion pressure and temperature. Three cams with three LIVC timings were designed tested bench. The gas exchange process of investigated by 1-D simulation model which calibrated experimental data. analysis conducted at constant speed 3600 r/min two IMEP loads 25 bar 15 respectively. depth is named reflect retard degree timing. results show that as increases, considerably increased in order keep same load. This causes an increase boost work. In addition, averaged difference during period BDC-IVC negative increases IVC timing, resulting more backflow rate quickly from nearly zero original timing 70°CA ABDC 22% deepest 120°CA ABDC. Furthermore, charging efficiency pumping loss obviously deeper cycle. On other hand, exhaust energy slightly decreases this study case, but ratio work over