为满足国六排放法规，国内载货汽车用大排量柴油机一般使用电控高压共轨+增压中冷+高效SCR+DOC+DPF+进气热管理（IAT）或排气热管理（ETV）的技术路线，IAT控制与ETV控制的目的是精确控制排气温度，实现排放与燃油经济性的平衡。不同的热管理控制策略对发动机及整车性能会产生不同影响。以一款采用ETV技术路线并伴随异常噪声的车辆为研究对象，对比研究了不同ETV热管理方案对发动机排放、整车排放及整车噪声的影响。同时研究了ETV控制结合整车进气系统优化对车辆噪声的改善效果，从而确定降低整车噪声、提高车辆舒适性的方案。

To meet the requirements of China Ⅵ emission regulations, the large displacement diesel engines for current domestic trucks generally use the technical route of electronically controlled high pressure common rail+pressurized intercooling+efficient SCR+DOC+DPF+intake thermal management control (IAT) or exhaust thermal management control (ETV). The purpose of IAT and ETV control is to accurately control the exhaust temperature, and therefore balance emissions and fuel economy. Different thermal management control strategies will have different impacts on engine and vehicle performance. Taking a vehicle with ETV technology route and abnormal noise as the research object, the effects of different ETV thermal management schemes on engine emissions, vehicle emissions and vehicle noise were studied. And the improvement of vehicle noise by ETV control combined with vehicle intake system optimization was studied, so as to find a scheme to reduce vehicle noise and improve vehicle comfort.