高速汽油机进气歧管结构参数的回归优化  

Regression Optimization of Intake Manifold’s Structure of High Speed Engine

作　　者：韦思航 张袁元 WEI Si-hang;ZHANG Yuan-yuan(School of Automobile and Transit,Nanjing Institute of Technology,Jiangsu Nanjing 211167,China)

机构地区：[1]南京工程学院汽车与轨道交通学院,江苏南京211167

出　　处：《机械设计与制造》2022年第2期120-125,共6页Machinery Design & Manufacture

基　　金：国家自然科学基金(51405221);江苏省重点研发计划(产业前瞻与共性关键技术)重点项目(BE2017008-3)。

摘　　要：合理设计进气系统,利用气体的动态效应可以有效提高发动机充气效率,改善发动机的性能。以某款高速汽油发动机为原型重新设计进气歧管,建立了一维性能仿真模型进行标定,利用析因实验确定优化的方向,建立相应的回归模型,采用遗传优化算法设计外特性时不同工况时对应的最佳进气歧管长度。优化结果表明:采用发动机可变长度进气歧管后,充气效率和转矩在外特性、全工况下,最大改善效果超过15%。为进气歧管的结构优化设计提供方向理论依据和基础,减少实验工作量,提高开发效率。Reasonable design of the intake system,using the dynamic effects of the gas can effectively improve the engine volumetric efficiency and improve the performance of the engine. Redesigning the intake manifold based on a high-speed gasoline engine,establishing a one-dimensional performance simulation model for calibration,using the factorial experiment to determine the direction of optimization,establishing a corresponding regression model,and using genetic optimization algorithms to solve the the optimum intake manifold length corresponding to different engine speed. The optimization results show that the maximum optimization rate of the volumetric efficiency and torque under the full working condition is more than 15% after the engine adopting the variable length intake manifold. It provides theoretical basis for structural optimization design of intake manifold,reducing experimental workload and improves development efficiency.

关 键 词：汽油机 进气歧管 回归分析 析因实验 优化设计 遗传优化 

分 类 号：TH16[机械工程—机械制造及自动化]