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(六)曲轴箱通风系统(如图31所示)在燃烧过程中产生的少量气体会通过活塞环和气门油封漏入曲轴箱内。这些气体(俗称“窜气”)会降低发动机油的质量。在窜气中悬浮的发动机油微粒可在被导入进气歧管前使用离心器进行分离,从而可降低发动机油消耗。曲轴箱通风系统可将这些气体从曲轴箱内排除,并在将其带入进气歧管后再回到汽缸重新燃烧。该封闭式系统可防止扫除的气体
(F) crankcase ventilation system (shown in Figure 31) in the combustion process produces a small amount of gas will leak through the piston ring and valve seal crankcase. These gases (commonly known as “blow-by gas”) reduce the quality of the engine oil. The engine oil particles suspended in the blow-by gas can be separated using a centrifuge before being introduced into the intake manifold, so that the engine oil consumption can be reduced. Crankcase ventilation removes these gases from the crankcase and returns to the cylinder for combustion after they have been taken into the intake manifold. This closed system prevents the sweeping of gases