涡轮增压汽油机匹配计算及性能预测

摘要

应用GT-power软件建立了某1.5 VCT发动机一维仿真模型,并通过试验数据对模型进行了标定.根据涡轮增压发动机的设计要求估算了涡轮增压器的性能参数值,从而选择了一款涡轮增压器.建立了加装涡轮增压器之后的发动机模型,增加了放气阀装置,并分别进行了平原、高原环境下的发动机的匹配计算和性能预测.结果表明,在平原、高原环境下发动机匹配情况均良好.%A 1-D model of a 1.5 VCT engine was with GT-power software was built and calibrated with the test data. Performance parameters of the turbocharger was estimated according to design requirement of turbocharged engine, thus a turbocharger is selected. An engine model added with turbocharger is established, in which a relief valve is added, and engine match calculation and performance predication are made under plain and plateau environment. The results show that the engine match is quite good both in plain and plateau environment.