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本文针对内燃机缸内气流运动研究需要，在国内首次开发研制出一套内燃机缸内全流场PIV测速系统。
In order to meet the research need of air flow in I. C. E., a set of PIV system has been developed.
通常在发动机倒拖工况下测量和研究缸内气流运动，对于燃烧过程中缸内流动规律的测量和研究还很少。
In this paper the in-cylinder air motion and its interaction with combustion are studied under both motored and firing conditions by LDA in a single-cylinder 4-valve S. I. engine.
内燃机缸内的气流运动和燃烧过程对发动机的整机性能有着重大的影响，是降低燃油消耗、减少排放和燃烧噪音的决定性因素。
With increasing restrictions on engine emissions, the need for reduced fuel consumption and low vibration, air motion and chemical reaction in the cylinder of diesel engine play an important role.
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