Abstract
An experimental study has been conducted to evaluate the advantage of the use of biodiesel fuel for simultaneous reduction of NO_x and PM done by introduction of EGR combined with high pressure fuel-injection. The effects of ambient temperature and oxygen concentration on ignition delay time at self-ignition combustion of biodiesel have been measured by using a constant volume combustion chamber. Engine bench test results show that low smoke emission achieved by using biodiesel and high pressure injection enables high EGR ratio, which results in lower NO_x emission compared to gas oil. Also, it is indicated that a large amount of EGR combined with high-pressure injection is effective to reduce SOF content in PM emission from biodiesel.
