A Matching Model of the Diesel Engine and the Turbo Charger in the Whole Engine Speed Range

A model describing the ratio of the boosting pressure ratios of the maximum engine speed and that of the low engine speed was developed.By solving the model numerically,a ratio map changing with the engine speed and the maximum pressure ratio was gotten.Comparison between the model and the experimental data showed that the model can give the relationship of the boosting pressure ratios correctly.The model can also give the turbo equivalent area relationship between two engine speeds when the same boosting pressure ratio was required.