Fuel System Response of a Common Rail Passenger Car Engine Fuelled with Palm Oil Biodiesel

Abstract

This study investigated the effects of palm oil methyl ester blends on a common rail passenger car engine in terms of changes in the fuel system response. Up to 40% biodiesel blend was used in this study. Operating on biodiesel causes the engine control system to modify the injection parameters by increasing the injection pressure and duration while advancing the start of injection timing for the same power output. This engine control system-response to biodiesel is due to the inherent low energy density of biodiesel. Low and medium speed/load region was proposed as an area where improvement by injection strategies optimization can be made.