Combustion analysis by using observed indicated diagram is of great importance for engine performance analysis and evaluation.
由测得的发动机示功图进行燃烧分析，对于分析和评估发动机性能具有十分重要的意义。
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As to the engines on vehicles or tractors etc, it is hard to evaluate the combustion process of each cylinder according to the indicator diagram measured with the indicator simultaneously.
Through measuring the indicator diagram of the combustion process and with the help of an analysis model, factors affecting engine performance are isolated in order to better performance.