Tip clearance numerical analysis is an important content of studying tip clearance control and improving engine performance.

叶尖间隙分析是研究叶尖间隙控制方法，改善发动机性能的重要内容。

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The results of dynamometer tests proved that the microcomputer controlled ignition system has a better effect in improving engine performance.

台架试验结果表明，该微机控制的点火系统对改善发动机的性能有较好的效果。

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Then it analyzes the combustion characteristic of the LPG engine based on the curve of the heat release rate, and puts forward the measure of improving the performance of the LPG engine.

由生成的放热规律曲线分析了液化石油气发动机的燃烧特性，并提出了改善液化石油气发动机的性能的措施。

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