但由于提前角减小，排气背压增大，发动机燃油消耗率上升8%左右。
But because of reduced injection timing and increased exhaust back pressure, the BSFC of the engine will be increased of 8%.
实验表明这种新型材料对发动机的动力性，燃油消耗率均有不同程度的改善。
The results show that the new material improves the power output, fuel consumption and durability.
实验表明这种新型材料对发动机的动力性，燃油消耗率均有不同程度的改善。
The results show that the new material improves the power output, fuel consumption and durability.
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