增压直喷汽油机非点火工况机械损失测定与研究  

Measurement and Research on Mechanical Loss of Tur-bocharged DI Gasoline Engine under Non-ignition Mode

作　　者：卢维伟 汪洋 李承运 孙建军 方会咏 吴海甫 LU Weiwei;WANG Yang;LI Chengyun;SUN Jianjun;FANG Huiyong;WU Haifu(Ningbo Geely Royal Engine Components Co.,Ltd.,Ningbo,Zhejiang,315336,China;Zhejiang Fangyuan Test Group,Co.,Ltd.)

机构地区：[1]宁波吉利罗佑发动机零部件有限公司,浙江宁波315336 [2]浙江方圆检测集团股份有限公司机械轻工部

出　　处：《小型内燃机与车辆技术》2023年第4期15-18,共4页Small Internal Combustion Engine and Vehicle Technique

摘　　要：通过试验,研究了一台增压直喷汽油发动机非点火工况的总机械损失,分析了非点火工况发动机机械损失的构成,得出了机械损失的影响因素,提出了降低机械损失的有效手段。分析结果表明,在发动机非点火工况,泵气损失、散热损失和摩擦损失是构成机械损失的3个主要因素。其中,泵气损失与节气门的节流作用有显著相关性,散热损失主要与节气门开度即进气量强相关,摩擦损失与发动机转速的相关性最显著。Through experiments,the total mechanical loss of a turbocharged direct-injection engine under non-ignition conditions is studied,the composition of the mechanical loss of the engine under non-ignition conditions is analyzed,the influencing factors of the mechanical loss are obtained,and the effective means to reduce the mechanical loss are put forward.The results show that the pump loss,heat dissipation loss and friction loss are the three main factors of mechanical loss in non-ignition engine.Among them,the pump air loss has a significant correlation with the throttling effect of the throttle valve.The heat loss is mainly related to the throttle opening,that is,the inlet volume.The friction loss has the most significant correlation with engine speed.

关 键 词：非点火工况 机械损失 泵气损失 散热损失 摩擦损失 

分 类 号：TK412[动力工程及工程热物理—动力机械及工程]