piston valve engine 中文意思是什麼

piston valve engine 解釋
活塞閥配汽蒸汽機
  • piston : n. 1. 【機械工程】活塞。2. 【音樂】（管樂器的）直升式活塞。
  • valve : n 1 【機械工程】閥，活門，舌門；汽門。2 【解剖學；動物學】瓣，瓣膜；（貝）殼瓣；【植物；植物學】...
  • engine : n. 1. 機械，機器。2. 引擎，蒸汽機，發動機。3. 機車，車頭。4. 工具；〈古語〉方法，手段。vt. 給…安裝發動機。
  1. The reassigned smoothed pseudo wigner - ville distribution ( rspwvd ) is introduced, which has less interference and higher resolution than other time frequency distributions like wigner - ville, choi - williams etc. it is used to detect the multi - knocking of engine such as cylinder, piston pin, valve, crank bearing, connecting rod bearing and jib knocking. a new fault diagnosis technique based on the rspwvd for the engine multi - knocking problem is proposed. by comparing the bispectrum and bicoherence of the gear vibration signals, it is demonstrated that bispectrum has an advantage over bicoherence for feature extraction of such signals

    第四章首次引入一種重分配方法，得到干擾項少而解析度高的重分配平滑偽魏格納維爾分佈（ rspwvd ） ；對發動機曲軸主軸承響、連桿軸承響、活塞銷響、活塞敲缸響、氣門響和挺桿響等常見機械異響故障振動信號特徵進行了全面地比較分析；通過對各種異響故障特徵信號的分析研究，提出基於rspwvd的發動機多異響故障診斷策略，利用該策略可以準確識別不同的發動機異響故障。
  2. A model of steam distributing valve of torpedo piston engine was built and analyzed under complex boundary conditions of displacement and thermal transfer using a commercially available finite element code marc / mentat320. the temperature field and stress field were present. according to the result, maximum deformation place was predicted, and thermal stress was major factor causing failure

    本論文應用i - deas軟體mastermodeler構造了配氣閥體的三維實體模型，並在marc環境下進行網格自動生成、邊界條件施加以及閥體的有限元分析，通過計算得到了閥體在所加復雜工況下的位移場、應力場和溫度場分佈，並根據分析結果對其結構提出改進意見。
  3. 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。
  4. Considering the probability of the collision of the valve and the piston of the engine, to obtain the adjust ability of valve timing of the haecvvs in different speeds, the moving of the valve and the piston have been simulated. some strategies to avoid the collision have been put forward. the temperature of solenoid coil rose sharply both in low engine speed and in high engine speed

    根據發動機活塞的運動規律及電控可變氣門系統的啟、閉特性，對不同轉速下活塞與氣門的相對位置進行模擬，以保證氣門不與活塞發生碰撞為約束條件，對氣門正時調節能力隨轉速的變化規律進行了研究，在此基礎上討論了氣門與發動機活塞避免碰撞的方案。
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