在作功沖程期間,氣門的位置都是關(guān)閉的.The position of the valves during the power stroke are both closed.動(dòng)力沖程的后段是絕熱膨脹過程.The remainder of the power stroke is an adiabatic expansion.當(dāng)排氣沖程開始時(shí), 氣缸被向上運(yùn)動(dòng)著的活塞刮掠.When the exhaust stroke starts, the...