During the valve overlap period, the exhaust pressure of a turbochargers, four-stroke/cycle diesel engine must be less than the intake manifold pressure to ensure __________.

题目介绍: Duringthevalveoverlapperiodtheexhaustpressureofaturbochargers four-stroke/cycledieselenginemustbelessthantheintakemanifoldpressuretoensure __________., effective cylinder scavenging and cooling?constant pressure from the turbochargers?cooler operation of the exhaust system?effective constant pressure for turbocharger operation? 本题为最佳选择题收录于二管轮题库中。