天然气发动机可变喷嘴涡轮增压器匹配研究  

Study of Variable Nozzle Turbocharger Matching on the Natural Gas Engine

作　　者：郝利君[1] 葛蕴珊[1] 黄英[1] 张付军[1] 朱辉 

机构地区：[1]北京理工大学机械与车辆工程学院,北京100081 [2]北京益麦斯(EMS)科技有限公司,北京102209

出　　处：《内燃机工程》2010年第1期47-50,共4页Chinese Internal Combustion Engine Engineering

基　　金：国防科工委基金资助项目(C172002C002)

摘　　要：针对488天然气发动机匹配了可变喷嘴涡轮增压器(VNT),设计了电子控制系统,并通过发动机试验研究了VNT匹配规律。天然气发动机VNT调节规律不仅与节气门开度(负荷)有关,也与发动机的转速有关。匹配试验结果表明:采用VNT增压技术后天然气发动机的功率和转矩显著提高,最大功率从58 kW提高到73 kW,最大转矩从156 N.m提高到212 N.m,且最大转矩点转速降低,大幅度改善了天然气发动机的动力性与经济性。A variable nozzle turbocharger（VNT） was applied on the 488 natural gas engine, the VNT electronically controlled system was designed, and the VNT matching regulation was studied based on the engine tests. The experimental results show that the VNT regulating discipline for the CNG engine is related to the throttle valve opening and the engine revolution speed. The power and torgue of the CNG engine increase remarkably by using VNT, the maximum power rises from 58 kW to 73 kW,the maximum torque increases from 156 N.m to 212 N.m,and the revolution speed at the maximum torque decreases, the economy and power performance of the CNG engine are improved greatly.

关 键 词：内燃机 天然气发动机 可变喷嘴涡轮增压器 匹配 特性试验 

分 类 号：TK464[动力工程及工程热物理—动力机械及工程]