Abstract
This paper focuses on the influences of linseed oil biodiesel-diesel fuel blends in view of combustion, engine performance and emission characteristics at various engine loads in a DI diesel engine. Hence, the test engine was operated with diesel and linseed oil biodiesel-diesel fuel mixtures (D100, L10, L20, L30) at 2200 rpm and different engine loads including 3.75, 7.5, 11.25, 15 Nm and full load. The highest in-cylinder pressure was obtained with L10 except for 3.75 Nm and full load condition. Indicated thermal efficiency (ITE) decreased by 7.29% with L10 according to D100 while specific fuel consumption (SFC) increased 3.78% with L10 according to D100 at 11.25 Nm. SFC was determined as 0.264 kg/kWh, 0.274 kg/kWh, 0.304 kg/kWh and 0.318 kg/kWh wih D100, L10, L20 and L30 at 11.25 Nm. ITE was computed as 32.9%, 30.5%, 28.7% and 26% with D100, L10, L20 and L30 at 11.25 Nm respectively. CA50 was determined as 31.68 °CA, 32.04 °CA and 33.76°CA with L30, L20 and L10 respectively at 11.25 Nm. Test results showed that CO decreased by about 36.2% with L30 according to D100. Conversely, 12.7% increase was seen on NOx with L30 compared to D100 at full load.
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