涡轮增压柴油机EGR系统设计

摘要

为了降低涡轮增压柴油机NOx的排放量,设计了一套涡轮增压柴油机的EGR(Exhaust Gas Recirculation)系统,对该系统的主要部件文丘里管、EGR冷却器、EGR阀和旁通阀等进行设计,并对系统进行计算.结果表明:该EGR系统在全工况范围内的最大EGR率达40％以上,EGR温度冷却到了130℃以下.%In order to reduce NO* emissions of Turbo-charged diesel engine, a EGR (Exhaust Gas Recirculation) system for turbo-charged diesel engine is designed. In this paper, the main components of the EGR system such as Venturi tube, EGR-cooler, EGR valve and bypass valve are designed as well. The calculating result of EGR system shows that the maximum EGR rate can reach 40% or more and the cooling temperature of EGR system can be reduced to 130 t or below.