A fresh air-fuel charge enters through the intake port, and the Burned gases exit through the exhaust port.
新的可燃混合气通过进气口进入，燃烧过的废气从排气口排出。
The utilization of the pressure wave in the intake pipe and exhaust pipe which not only make more exhaust gas out of the cylinder but also improve the charge efficiency and make more fresh gas.
合理的利用进、排气管中的压力波，不仅能使更多的废气排出缸外，而且还可以提高发动机的充气效率，使尽可能多的新鲜工质充入。
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