棉子油與去漬油各一半的混合燃料,在原柴油引擎燃料噴射壓力不變的情形下,其油料消耗和廢氣排放濃度均較其他的混合比率良好。但又在燃料噴射壓力改變的條件下,經引擎馬力實驗結果顯示,當燃料噴射壓力低於原燃料噴射壓力時,其燃料消耗雖有減少,但廢氣排放濃度改善不良,又當燃料噴射壓力比原引擎的燃料噴射壓力高時,雖對廢氣排放濃度有所改善,但會使油耗增加很多。因此,不宜將原柴油引擎燃料噴射壓力做改變。
The blending fuel of cottonseed oil 50% and light naphtha 50% is better than the other blending fuel ratio in BSFC and the concentration of exhaust gas emission under the original DI diesel engine. However, when the fuel injection pressure is changed, the experimental results show the BSFC is decreased, but the concentration of exhaust gas emission is not improved in the lower fuel injection pressure than the original. Moreover, when the fuel injection pressure is higher than the original, the concentration of exhaust gas emission can be improved, but the BSFC is increased a lot. Therefore, it is not a better way to change the injection pressure of the original DI diesel engine.