Pages 127-128
In this study, the exhaust gas composition was clarified by using a gas chromatography, and combustion completion was considered in 2-stroke HCCI engine. In Exhaust gas composition, n-Butane was high concentration as opposed to calculation results and intermediate products (CO, C_2H_4,C_3H_6,CH_4,C_2H_6) also exhausted. In actual engine, it was considered that mixture near cylinder wall couldn't be ignited because of heat loss to wall. This region was almost 0.75-1.56mm from wall by calculated from exhaust gas composition and concentration by 3 models. Increasing maximum in-cylinder gas temperature until 1600K, combustion efficiency became higher and HC emissions became lower, but over 1600K, combustion efficiency kept constant 82±3% and HC emissions became higher again.
