The results of the investigation show that soot appears firstly in the rich fuel area where is permeated by air within combustion chamber.
研究结果表明：在柴油机燃烧过程中碳粒最早出现在燃烧室内有空气渗混的富油区；
Valves are clustered near the center of the bore to minimize combustion chamber volume and to provide ample squish area.
阀门是聚集在附近的孔中心，以尽量减少燃烧室量，以及提供足够的果酱领域。
It is concluded that the combustion chamber passage area, passage direction, passage shape and passage position have a strong effect on in-cylinder current motion and flow speed.
计算结果表明，燃烧室通道截面积、通道倾角、通道形状、通道布置对气流运动的形式及气流速度均有较大的影响。
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