基于先进有效的发动机性能模拟技术,对不同排量发动机进气歧管系统气体动力学相似性进行了研究,确定和验证了气体动力学相似性的主要因素,如压力波频率和振幅.首次提出了同缸数不同排量发动机达到同一充气效率的相似性准则.当满足气体动力学相似性准则时,经过优化了的(现有的)进气歧管系统的设计参数根据相似性原理可移植到其他同缸数不同排量的发动机上,使得该类发动机具有相同的充气性能(充气效率—转速特性),也可直接利用参数优化得到的经验和规律,这样可极大地减少新发动机进气系统开发的工作量. Based on the advanced and effective engine performance simulation technology, the gas dynamics similarity of the intake manifold system with different displacement engines was studied and the main factors of the gas dynamics similarity were confirmed and verified, such as the frequency and amplitude of the pressure wave. The similarity criterion for achieving the same charge efficiency for engines with the same displacement and the same displacement is obtained.The design parameters of the optimized (existing) intake manifold system are portable according to the principle of similarity when the criterion of gas dynamics similarity is satisfied To other engines with different displacements in the same cylinder, this kind of engine has the same inflation performance (inflation efficiency - speed characteristics), but also can directly use the experience and laws of parameter optimization, which can greatly reduce the new engine intake System development workload.