Influence of injection pressure on the performance of diesel engine using high performance fuel blend

Abstract

In the present study, the influence of fuel injection pressure on the performance, combustion and emission characteristics of a 4 stroke CI engine is experimentally studied. Initially a fuel blend aiming to deliver high performance is prepared (5%Bio Diesel, 5% Rice bran oil, 40% Pentanol, and 50% Diesel). The prepared blend is tested for its properties according to American Society for Testing and Materials (ASTM) standards. The engine study was conducted by having 4 different kinds of injection pressures namely Normal Pressure (200bar), Retarded Pressure (180bar), Advanced Pressures (220bar and 240bar). The Brake Thermal Efficiency (BTE) is improved upon increasing the injection pressure. As a penalty NOx emission were increased since higher injection pressures promoted better combustion. But the Specific Fuel Consumption (SFC) is less at advanced injection pressures. The CO2 Hydrocarbon emissions and smoke opacity values were comparatively reduced on advancing the injection pressure. The prepared blend can be used in a CI engine by advancing the injection pressures for improving the performance and combustion characteristics.