Experimental Study on A Diesel Engine Fueled with Soybean Biodiesel

Abstract

Biodiesel is a renewable and environmentally friendly alternative fuel derived from natural fats or vegetable oils and it is considered as an attractive alternative to replace diesel fuels. To optimize the application of biodiesel on vehicle diesel engines, the power and fuel economies performances of a diesel fueled with soybean biodiesel were investigated under different engine loads and speeds. Experimental results show that, compared with diesel fuel, with increase in the biodiesel in the blends, the brake power and torque and the brake specific energy consumption increase, the smoke density under free acceleration decreases except B10, the NO X emissions increase. The trade-off relationship is clear between the NO X and smoke density when the diesel engine fueled with different biodiesel percentage in the blends. From the trade-off relationship between NO X and smoke density, the optimum blend ratio is B20 in the experimental study.

Influence of CME-Diesel Blends on the Performance of a Light Duty Common Rail Direct Inject Engine

“…They observed that the torque initially increased with the addition of biodiesel until it reached a maximum value at B17.5 and then torque decreased with further increase in biodiesel content in fuel blend. Song et al [6] using soybean biodiesel tested on a four cylinder supercharged direct injection engine also observed increase in torque with the increase of biodiesel content in fuel blend. With respect to specific fuel consumption, most researches agree [2,3,5,6] that the fuel consumption of biodiesel blends became higher as biodiesel content in fuel blend was increased.…”

“…Song et al [6] using soybean biodiesel tested on a four cylinder supercharged direct injection engine also observed increase in torque with the increase of biodiesel content in fuel blend. With respect to specific fuel consumption, most researches agree [2,3,5,6] that the fuel consumption of biodiesel blends became higher as biodiesel content in fuel blend was increased. How H.G et al [7] also tested CME using a CRDi diesel engine with varying brake mean effective pressure at a constant speed and observed a similar trend.…”