新型无节气门进气系统--串联气门速度控制系统

摘要

为了改善车用汽油机在城市路况下（即中小负荷的工况下）的燃油经济性，设计了一种由两个串联进气门组成的进气控制系统（SVSC），采用全新的进气控制原理，不通过节气门的操控来降低部分负荷工况下发动机进气损失并提高燃油经济性。仿真计算与试验表明，SVSC 系统可大幅减少发动机部分负荷下的进气损失，并且不需要对发动机的尺寸或结构作较大改动。%In order to improve the fuel economy of vehicle gasoline engine in city cycle with medium and low load ,the series valve speed control (SVSC) system was designed .Based on the new intake control principle ,the throttle was not used to reduce the intake loss and improve fuel economy at partial load .The comparison between simulation and test results show that the sys‐tem can greatly reduce the intake loss at partial load without large change of engine size and structure .