摘要
汽油机循环模拟以建立汽油机一个完整循环过程的数学模型为基础，它可用来研究流动、传热和燃烧等过程的细节及发动机整机性能。本模拟把运行模式、运行工况、气道状态、传热、湍流参数及发动机设计等参数作为输入，输出不同曲轴转角下的气缸压力、温度、传热率和通过进、排气门的工质质量流量、流速及燃烧阶段卷吸燃烧质量百分数。循环结束后，给出积分结果，如容积效率、热效率、指示压力、平均有效压力、热损失、平均排气温度及油耗等。文中还通过对ＭＴ１００四冲程机的实例计算，证明了模拟的实用性。
Based on founding the mathematical model of a total cycle process,spark-ignition engine cycle simulation can be used to research the details of flow,heat-transfer,combustion and engine performance etc.This Simulation takes operating mode,operating conditions,manifold conditions,heat transfer,turbulent parameters and basic engine design parameters etc.as input parameters.It outputs cylinder pressure,temperature,heat transfer rate,mass flows & velocity during intake and exhaust processes,the mass fractions entrained and burned during combustion vs.specified crank angle.Once the cycle is over,a summary result by integrating some of the governing equations including volumetric and thermal efficiencies,gross indicated and mean effective pressures,total heat loss,mean exhaust temperature and fuel consumptions etc.is given.Through example calculation of a MT100 engine,the practicability of the simulation is certified.
