某V型8缸双增压发动机进气管布置形式优化分析

杨栋^1,2，刘俊龙^1,2，闫利利^1,2，冯新刚^1,2，韩美莹^1,2

1.内燃机可靠性国家重点实验室，山东 潍坊  261061；2.潍柴动力股份有限公司，山东 潍坊  261061

摘要：为提高某V型8缸双增压柴油机的进气均匀性和充气效率，利用GT-Power软件建立匹配2台增压器的柴油机计算模型，仿真分析3种进气管布置方案的发动机各缸进气均匀性、一次加载率、增压器性能及发动机性能等参数。分析结果表明：布置方案C的整体性能、一次加载率、各缸进气均匀性较好且增压器无喘振风险；与方案A、B相比，方案C的整机燃油消耗率降低0.5~1.2 g/(kW·h)，充气效率提高1%~2%。该研究可为V型8缸发动机进气系统设计提供参考。

关键词：柴油机；进气管；各缸进气均匀性；一次加载率；性能

Optimization analysis on intake pipe layout of V-type diesel engine with 8 cylinders and 2 turbochargers

YANG Dong^1,2, LIU Junlong^1,2, YAN Lili^1,2, FENG Xin′gang^1,2, HAN Meiying^1,2

1.State Key Laboratory of Engine Reliability, Weifang 261061,China;

2.Weichai Power Co., Ltd., Weifang 26106,China

Abstract：In order to improve intake uniformity and volumetric efficiency of V-type diesel engine with 8 cylinders and 2 turbochargers, GT-Power software is used to model the diesel engine to analyze and investigate cylinder uniformity,single step load rate, turbocharger and engine performance. Three intake layouts are analyzed. The analysis results show that type C shows the best overall performance, single step load rate and cylinder uniformity,and the turbocharger has no surge risk. The fuel consumption of the engine is reduced by 0.5-1.2 g/（kW·h）and higher volumetric efficiency by 1%-2% with type C compared to type A and B.This study can provide reference for the design of intake system of V-type diesel engine with 8 cylinders

Keywords:diesel engine; intake pipe;intake uniformity of each cylinder; single step load rate; performance