某GDI发动机燃油湿壁问题优化的研究  

The Optimization Study on Wall Wetting of a GDI Engine

作　　者：杨俊超[1,2] 尹亿光 赵景广 冀晓栋[1,2] 苏正杲[1,2] 周武明[1,2] 

机构地区：[1]长城汽车股份有限公司技术中心,河北保定071000 [2]河北省汽车工程技术研究中心

出　　处：《小型内燃机与车辆技术》2016年第1期37-42,共6页Small Internal Combustion Engine and Vehicle Technique

摘　　要：直喷发动机的湿壁问题会导致机油稀释,从而导致机油更换周期缩短,摩擦副严重磨损,部分功能件失效等问题。本文主要通过对某缸内直喷汽油发动机3 200 r/min时导致燃油湿壁的原因进行分析,特别通过仿真软件从喷油时刻及喷油角度两方面进行分析论证,确定导致发动机燃油湿壁的根本原因,并制定优化措施。Spray impingement on piston and cylinder walls in gasoline direct injection（GDI）engine results in lubricant dilution, which can lead problems such as shorten the engine oil change cycle,wear down friction pair seriously, lose efficacy for some function parts, etc. This article mainlyanalyse the caused reason of oil wall wetting in gasoline direct injection engine at 3200 rpm,especially make analysis and verification on injection timing and injection angle through simulation software to find out the key reason causing engine oil wall wetting problem,deciding the refine strategy.

关 键 词：GDI喷雾 燃油湿壁 仿真分析 

分 类 号：TK411.9[动力工程及工程热物理—动力机械及工程]