基于模型的增压直喷汽油发动机涡轮前压力预测-《内燃机与动力装置》-电子报刊-山东内燃机学会

摘要：为了更准确的计算增压直喷汽油发动机控制系统中的充气效率及空气流量模型，本文利用德尔福系统增压汽油发动机涡轮前压力预测算法，结合压气机及涡轮的流量特性，对增压直喷发动机的涡轮前压力进行重新估算，并在发动机台架上进行稳态和瞬态试验验证，结果表明，排气预估模型预测结果与试验结果具有很好的一致性。

Abstract: In order to accurately caculate the volumetric efficiency and the model of air flow for turbo gasline direct injection engine, according to the pressure estimating algorithm before turbine supplied by Delphi on turbocharger gasline, combining with the mass-flow characteristics for compressor and turbine, re-estimated the pressure before turbine on turbo gasline direct injection engine, then validated the steady state and transient opertiong on engine test bed, the results show that there is good consistency between estimated results and test results.

Key words: direct injection; volumetric efficiency; compressor; pressure before turbine;

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