摘要
本文建立了汽油机工作过程的准维预测模型,其中包括热力学子模型、紊流火焰传播子模型,燃烧室几何子模型及排放子模型等.为了验证模型的计算准确性,本文实测EQ6100发动机在外特性工况下的各种性能参数,并与计算值进行对比,结果表明它们有较高的吻合性.在此基础上对该发动机进行改变压缩比、转速等8个变参数预测计算,获得了各参数的变化对发动机性能指标的影响趋势大小。
In this paper,a two-zone quasi-dimension model which is based on Benson' s description has been established for combustion process in S. I. engine . The model includes the thermodynamic submodel , turbulence flame propagation submodel, combustion chamber geometric submodel and mission submodel. In the turbulence flame propagation submodel the flame speed rate(FSR) is defined and the turbulent flame speed calculated by experiential formula based on the measured pressure - time diagram . The combustion chamber geometric submodel is adopted according to EQ6100 gasoline engines separately.
To examine the accuracy of the model, some of the parameters of two engines under the full load conditions have been measured. The resuits from the tests have shown high concidence with those from the calculations. therefore ,this simulation model is valuable both for the practical purpose and further deveioping. On base of above research the EQ6100 gosoline Engine is predicted by means of changing compression ratio,rpm etc 8 different parameters ,and the influence tendency of those parameters on Engine performance is obtained.
出处
《湖北汽车工业学院学报》
1990年第1期32-41,共10页
Journal of Hubei University Of Automotive Technology
关键词
紊流燃烧速度
汽油机
层流燃烧速度
turbulent combustion velocity, laminar combustion velocity, Flame front,Flame velocity, indicator diagram.
