可变进气歧管

通过仿真计算研究了改善发动机动力性能的可行性技术方案，重点介绍了可变进气歧管技术和可变进气门正时技术。

The possible technical approaches to improve engine performance have been studied using simulation , including the variable intake runner length and the intake VVT technologies . 2 .

以本文中所研究的发动机为例，由于可变进气歧管长度和可变气门正时等新的执行机构的采用，使得发动机的设计、优化和试验标定更加困难，需要投入更多的资源、时间及花费。

Taking the mentioned engine as an example , with the use of new variable actuating devices , such as variable intake runner length and intake VVT , the engine design , optimization and calibration become more complicated , that requires largely increased the resources , time and cost .

第二部分用STAR-CD流体软件对可变式进气歧管进行空气流动数值模拟分析。

The second part carries on the air fluid simulation analysis of variable intake manifold with the STAR-CD fluid software .

发动机可变长度进气歧管系统的优化设计研究

Study on Optimization Design of Engine Variable Length Intake Manifold System

本文主要进行可变式进气歧管的三维曲面重建和空气流动模拟分析的研究。

This thesis mainly carries on research of three dimensional surface reconstruction of variable intake manifold and air fluid simulation analysis .

对该汽油机采用的可变进气系统的歧管直径和长度、控制阀开关的切换转速等结构参数进行了优化设计。

Structure parameters of its variable intake system , such as diameter and length of intake manifold , switching speed of control valve switch , etc. , are optimized .