تاثیر شکل پاشش مثلثی بر روی عملکرد موتور احتراق اشتعال تراکمی با واکنش پذیری کنترل شده

Injection rate shape has an important effect on the performance of internal combustion engines. In this study, the effect of three triangular injection rate shapes, including left triangle, middle triangle, and right triangle, which are distinguished by the parameter a equal to 0, 0.5, and 1, respectively, on the performance of a Reactivity Controlled Compression Ignition (RCCI) engine are investigated and compared with the square injection rate shape. It was realized that by increasing a, the gross indicated efficiency (GIE) and nitrogen oxides (NOx) emissions increase, while unburned hydrocarbons (UHC) and carbon monoxide (CO) emissions decrease. The highest GIE and the lowest UHC and CO emissions are obtained by the right triangle, which are 9.9% higher and 27.45% and 25.51% lower than those obtained by the square injection rate shape, while the lowest NOx emissions are obtained by the left triangle, which is 14.15% lower than that obtained by the square injection rate shape.