进气歧管长度对发动机性能影响的试验研究

Experimental Research of Intake Manifold Length's Effect on Engine Performance

进气歧管长度对发动机充气效率影响很大,对可变长度(VIM)进气歧管及不同长度的等长进气歧管进行发动机性能对比试验,并基于AVL CRUISE软件对VIM进气歧管及400 mm等长进气歧管进行了整车新欧洲驾驶循环(NEDC)循环建模仿真,试验及仿真结果对发动机进气歧管的选取有着重要的指导意义。

The length of intake manifold has a significant effect on engine volumetric efficiency. And make the engine test bench re- search use the VIM （variable intake manifold） and some other different length intake manifold. Establish the VIM and 400 mm length intake manifold models by AVL CRUISE and simulate the test results based on the vehicle NEDC cycle. It is a great significance to the selection of engine intake manifold.