以质量计的燃油消耗率有所增加，但以燃料热值计的比能耗降低。

The brake specific fuel consumption is increased, but brake specific energy consumption can be improved.

youdao

缺点：使用燃料价格高，煤气的热值较低。

Faults: use fuel prices high, gas calorific value is lower.

youdao

缺点：使用燃料价格高，煤气的热值较低。

Faults: use fuel prices high, gas calorific value is lower.

youdao