성층연소 직분식 엔진에서의 propane과 n-butane의 연소 및 배기특성 비교

Comparison of Combustion and Emission Characteristics of Propane and n-butane in a Stratified DISI Engine

The combustion and emission characteristics of propane and n-butane which are the main components of LPG were compared with gasoline. The experiment was performed in a stratified DISI engine under lean combustion conditions. Mixtures of propane and n-butane wre more homogeneous because propane and n-butane have better evaporation characteristics. As a result, combustion speeds of n-butane and propane were slower, and emission levels of NOx and PM were lower. However, in spite of better evaporation, PM from propane was higher.