对于较高负荷，存在一个指示热效率较高的甲醇浓度区间。

While at high loads, there exists a region of methanol concentrations for getting optimum thermal efficiency.

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结果表明：HCCI燃烧有较高的指示热效率，最高可达60%；指示热效率主要受负荷的影响，转速对其几乎没有影响。

The experimental results show that HCCI can obtain high mean indicated heat efficiency up to 60% and mainly be effected by the engine load and hardly by the engine speed.

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结果表明：HCCI燃烧有较高的指示热效率，最高可达60%；指示热效率主要受负荷的影响，转速对其几乎没有影响。

The experimental results show that HCCI can obtain high mean indicated heat efficiency up to 60% and mainly be effected by the engine load and hardly by the engine speed.

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