PCV系统将窜漏进曲轴箱的混合气引入进气系统，然后在燃烧室内进行二次燃烧。
PCV system will be a mixture of leaking into the crankcase leap into air intake system in the combustion chamber, then a second combustion.
通过试验研究了二次空气的进气形式、进气位置、进气量和发动机工况等对系统净化效果的影响。
A series of experiments is carried out to test the influence of the type, position and quantity of secondary-air influencing the system on engine performances.
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