单选题
In a turbocharged four-stroke/cycle diesel engine, the exhaust valve remains open until after top dead center and the intake valve opens before top dead center to（）.
发布日期：2021-03-22
produce a scavenging effect in the combustion space
equalize cylinder and exhaust manifold pressures
alleviate the difference in valve size between the intake and exhaust
flush out condensate that collects after each compression stroke
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