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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 quasi-dimensional prediction model of gasoline engine working process is established, including the thermodynamic sub-model, turbulent flame propagation sub-model, combustor geometric sub-model and emission sub-model, etc. In order to verify the accuracy of the model calculation, this paper measured the EQ6100 engine external characteristics Various performance parameters under different operating conditions were compared with the calculated values and the results showed that they had a good match.On the basis of this, the engine was predicted and calculated by changing 8 parameters including compression ratio and rotational speed, Changes in the parameters of the engine performance indicators trend size.