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.
研究试验结果表明，分层扫气可减少换气过程的燃料损失，使燃油消耗率大幅度下降； 使混合气空燃比的范围加大。
The result shows that stratified scavenging reduces fuel loss during air exchange greatly lowing the fuel consumption rate and enlarging the air-fuel ratio range.
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