Numerical studies were conducted to investigate the internal flow field and combustion characteristics of DISI engine with the fuel of low fraction methanol, M0 and M31, in gasoline and two stage injection at 4000rpm WOT (Wide Open Throttle). Mass flo...
Numerical studies were conducted to investigate the internal flow field and combustion characteristics of DISI engine with the fuel of low fraction methanol, M0 and M31, in gasoline and two stage injection at 4000rpm WOT (Wide Open Throttle). Mass flow of the injected fuel to cylinder was corresponded air-fuel ratio of each fuel for complete combustion. This study presents the CFD modeling using S/W STAR-CD v3.26. When M31 fuel was used, uniformity, equivalence ratio mean pressure and temperature in cylinder increase. When two stage injection was used, there was no significant change in uniformity and equivalence ratio. But mean pressure and temperature in cylinder increase. When M31 fuel and one stage injection was used, the engine emission of carbon monoxide (CO) and nitrogen oxides (NO) increased about 36%, 12% comparing with benchmarking case in cylinder prior to TWC (Three Way Catalytic converter). and also, when two stage injection was used, CO and nitrogen oxides NO increased.