A Simulation Study of the Effect of HCNG Fuel and Injector Hole Number along with a Variation of Fuel Injection Pressure in a Gasoline Engine Converted from Port Injection to Direct Injection

The number of injector holes and the fuel-injection pressure in an internal combustion engine can affect performance exhaust emissions. Conversion a port-injection gasoline to HCNG direct-injection improves In addition, increasing injection helps increase performance. this study, AVL Fire software was used perform simulation by certain adjustments. applied mods 15, 20, 25 bars, numbers were 3 6, compression ratio changed from 10:1 14:1, amount hydrogen enrichment natural gas 10%, 20%, 30%, 40%. This paper discusses items above with regard power, torque, chamber pressure, fuel conversion efficiency, result determined that reduces CO emission so contour plots confirmed balanced distribution temperature pressure. According obtained results, maximum improved 2.5% 5% at different speeds 30% added hydrogen, bar 6-hole injectors. decreased approximately NOx increased about 10%.