微型面包车发动机进气歧管的优化设计

针对微型面包车的工作特点及其对发动机性能的需求,通过优化设计发动机进气歧管,实现发动机最大扭矩点前移、中低速扭矩明显提高的性能优化目标；优化进气歧管设计的方法是:首先由BOOST仿真软件搭建发动机工作过程的一维模型,经过优化计算确定最佳的进气歧管关键参数；然后建立进气歧管内核三维模型,并根据内核的CFD流场分析结果优化内核,以降低进气阻力、提高进气均匀性；完成壳体设计,制作进气歧管快速样件,在基础发动机上试验,考核设计指标.

Optimal Design Method for Intake Manifold Use on Mini-bus's Engine

Optimizing the intake manifold design to enhance the engine torque at low and moderate speed,and lead the maximal torque geted at a lower speed.The optimal design method for intake manifold is:Firstly,Simulating the engine working process using BOOST,confirm the best parameter of intake manifold by simulating.Secondly,building the core’s 3D model.Analysing the core’s flow field distribution and otimizing the core,in order to reduce the flow resistance and enhance the air equipoise.Lastly,Completing the intake manifold’s model,and building a rapid product sample for engine performance test,confirming whether the manifold’s design fulfill with target.