“engine variable valve timing control”的概念、定义、翻译、参考文献-科学参考

单词	engine variable valve timing control
释义	engine variable valve timing control Encyclopedia 工学发动机电子控制系统释 engine variable valve timing control发动机可变气门正时控制通过机械、电磁或液压控制等方式，改变发动机气门开始开启和关闭时刻的气门正时，从而改善燃烧过程，尽量减少耗油量和废气排放，从而提高发动机的综合性能的技术。
随便看	urban survey unit urban sustainability urban sustainable development urban system urban system function structure in the administration area of city urban system planning urban system planning in the administration area of city Urban System Planning of the Zhujiang River Delta urban system scale structure in the administration area of city urban systems engineering urban system spatial pattern in the administration area of city urban system theory urban thermal environment urban topographic survey urban traffic urban traffic construction management system urban traffic management platform urban traffic management system urban traffic system urban traffic tunnel fire urban transportation urban transportation demand management urban transportation development policy urban transportation economy urban transportation layout

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