燃烧室容积是指活塞位于上止点时，其顶部与气缸盖之间的容积称为燃烧室容积。一般用Vc表示。活塞顶部上方整个空间（活塞顶、气缸盖底面和气缸套表面之间所包围的空间，凹顶活塞包括凹坑的容积）的容积。
应用理想气体状态方程，对柴油机活塞燃烧室容积的检测方法进行了研究。
Based on ideal gas equation, the measurement method of diesel engine piston combustion chamber volume was researched.
本文提出压缩冲程期间计算平顶活塞燃烧室流动特性摸拟的有限容积法。
This paper presents a finite-volume method for flow characteristics simulation in a combustion chamber with a flat-topped piston during the compression stroke.
结果发现，发动机燃烧室存在一个自由容积的阈值，这个值是影响发动机稳态燃烧和非稳态燃烧的界限值。
It verified that there is a free space limit in motor combustion chamber. This limit is a value that affects the stable and unstable combustion.
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