涡轮增压柴油机EGR系统设计

Design of EGR System for Turbocharged Diesel Engine

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 Recircula-tion)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。

Abstract: In order to reduce NOx 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 ℃ or below.