可变几何涡轮增压器液控执行机构的建模与仿真

摘要

简要介绍可变几何涡轮增压器的结构组成和工作原理,分析作为涡轮增压器核心部件的液控执行机构对涡轮增压器性能的影响.基于液控执行机构工作原理建立该液控执行机构的数学模型,利用Simulink仿真平台对该液压控制系统进行数字仿真,得出该液控系统的时域指标,并分析各结构参数对液控执行机构性能的影响.%A brief introduction of the structure and working principle of the variable geometry turbocharger (VGT) was given,and the influence on performance of VGT by hydraulic-control system as a core part of VGT was analyzed.A mathematical model of the hydraulic-control system was built based on its working principle.The hydraulic-control system was simulated by Simulink.The timedomain indexes of the hydraulic system were obtained.The influence of every structure parameter on performance of the system was given.