“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	blood nerve barrier blood of animals blood oxygen level dependent blood parrot cichlid blood pathogen inactivation blood perfusion blood perfusion imaging agent blood plasma blood platelet blood platelet disorders blood platelet of domestic animals blood pool blood pool imaging blood pool imaging agent blood pressure blood pressure measurement blood pressure measurement by auscultation blood product blood product control blood product depots blood products in war blood purification materials blood purification system ancillary device blood purification system and instruments blood purification technic

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