谈海涛，左承基
（合肥工业大学 机械与汽车工程学院，安徽 合肥 230009）
摘要：进排气系统是内燃机的重要组成部分，进排气系统的性能直接影响进气和排放的质量。本文用MATLAB/SIMULINK软件对发动机进排气系统进行建模与仿真，通过改变管道直径、长度，研究进排气管结构参数对发动机进排气岐管的影响。并通过油门突变，得到排气岐管出口压力和温度的动态变化曲线，仿真结果对发动机进排气系统的设计具有一定的指导性作用。
关键词：进排气系统；MATLAB/SIMULINK；稳态仿真；排气背压
Abstract：Intake and exhaust systems are the important parts of the engine. Their
properties directly determine the quality of the gas and emission. In this
paper, using MATLAB/SIMULINK software we establishes the model and simulation
of intake and exhaust systems, studied the influence of the structure
parameters of the intake and exhaust systems on intake and exhaust manifold
pressure and temperature by changing diameter and length of pipes and gets get
the pressure and temperature curve of the exhaust manifold outlet in the
process of the throttle mutation. The simulation results provide a reference
for designing the engine intake and exhaust system.
Keywords: Intake System and Exhaust System; MATLAB/SIMULINK; Steady
Simulation; Exhaust Back Pressure
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