李云清;庹化金

北京航空航天大学汽车工程系

     摘要：改进进气系统,提高充量系数是改善汽油机动力性能的一个重要措施。利用Boost软件建立循环模拟计算模型,研究进气管长度和直径对发动机充气效率以及性能的影响规律,确定利用循环模模拟技术设计可变长度进气管的工作流程。对某四缸汽油机计算结果表明,采用可变长度进气管结构,比原机有更高的充量系数,改善了发动机的动力性能。

     关键词： 汽油机;;可变长度进气管;;循环模拟

        Abstract: Intake system optimization to increase the volumetric efficiency is an important approach to the improvement of the gasoline power.Establish a cycle simulation model by the simulation software Boost,and investigate the influence of the length and diameter of intake on volumetric efficiency and engine performance,then decide the work process that design the variable geometric intake.It is shown by calculation that the gasoline engine with variable geometric intake system has higher volumetric efficiency.The dynamic performances of the engine are improved.

        Keywords: Gasoline Engine;Variable Geometric Intake;Cycle Simulation

参考文献：

[1]马南,刘耀武,张所金等.进气管长度可变系统的研究.车用发动机,2003(4):22-24.

[2]许思传,陆玉佩,陆渊等.电喷汽油机可变进气和配气系统的设计.内燃机与动力装置,2006(3):1-6.

[3]AVL Boost User Guide V4.0.4 2004.

[4]倪计民,杜丽玫,高征等.电喷汽油机可变进气系统的优化设计.汽车技术,2005(2):16-19.