This paper studies the effect of fuel characteristics on spark ignition engine performance.

本文主要研究燃料组分对火花点火发动机运行性能的影响。

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Through researches on fuel characteristics of the engine, a new method for establishing dynamic 3-parameter-controlled optimal fuel-economy shifting schedule was presented.

通过对发动机燃油消耗特性的研究，提出一种较为简单的动态三参数最佳燃油经济性换挡规律制定方法。

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In order to study the fuel mass flow rate regulation characteristics of tube-in-hole for solid fuel ramjet, the flow field of turbulent combustion was numerically analyzed.

为了研究固体燃料冲压发动机内部套管结构调节燃料流量的特性，对某模型发动机的湍流燃烧流场进行了数值分析。

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With demand for large SUVs beginning to level off, automakers are finding new ways to blend roomy interiors with better fuel economy and driving characteristics.

CNN: Car shopping 2006: The inside track

Others attest to his charisma and charm, characteristics that no doubt helped fuel rumors of indiscretions in the early years of his marriage.

CNN: Prince Philip: The man behind the queen