open piston 中文意思是什麼
open piston
解釋
明活塞-
In the first fire - engines, a boy was constantly employed to open and shut alternately the communication between the boiler and the cylinder, according as the piston either ascended or descended
最初的蒸汽機，原需僱用一個兒童，按活塞的升降，不斷開閉汽鍋與汽筒間的通路。 -
A open - close mathematic model is introduced into calculation of torsional vibration. results show : kurtosisness and high harmonic will increase when crankshaft have crack. 5. cylinder score is also diagnosed by torsional vibration in this paper, when cylinder score occurring, the friction of piston will decrease the action of air pressure
本文借鑒了裂紋轉子剛度的開閉模型，首次對含有變剛度單元的柴油機動力裝置進行了扭振計算，結果表明柴油機曲軸有裂紋后，扭振的角位移和附加振動力矩的高諧次分量會增加，峭度值增加。 -
( 2 ) in the original system because of the area between the piston and the piston pole is too small, the system pressure will rise when in the return stroke. and the reliever valve will open. the return velocity will reduce
（ 2 ）原設計中，由於活塞和活塞桿的面積差很小，回程上行時，系統壓力會迅速升高造成溢流閥的溢流而使回程速度降低，從而降低了系統的工作效率。 -
Also the valve heads will be liable to be burnt by the passing hot gases, and there is the likelihood of the piston crown touching an open valve, which can seriously damage the engine
此外氣門頭易於被通過的熱氣體燃燒，這有可能使活塞頻繁沖擊打開的氣門，使發動機嚴重損壞。
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