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.