GDI汽油发动机外特性的试验研究  

Experimental Research on the External Characteristics of GDI Gasoline Engine

作　　者：蓝翠汪 潘永亮 徐成思 郭晓宇 LAN Cuiwang;PAN Yongliang;XU Chengsi;GUO Xiaoyu(Dongfeng Liuzhou Automobile Co.,Ltd.,Liuzhou Guangxi 545005,China;School of Mechanical Engineering,Guangxi University,Nanning 530004,China)

机构地区：[1]东风柳州汽车有限公司,广西柳州545005 [2]广西大学机械工程学院,南宁530004

出　　处：《装备制造技术》2021年第8期5-7,27,共4页Equipment Manufacturing Technology

基　　金：广西科技重大专项(桂科AA19182002-2)。

摘　　要：为了进一步优化GDI发动机的性能,通过发动机台架试验研究了不同转速对GDI发动机的影响。结果表明:在全负荷工况下,随转速增加,GDI发动机的缸内压力峰值和功率增加,最大压力升高率降低;GDI发动机的有效热效率随转速增加先上升后下降,在中等转速(1 500 r/min~4 000 r/min)达到最大扭矩。In order to further deepen the understanding and research and development of the GDI engine. Therefore,in this study,a GDI gasoline engine is used to study the influence of different speeds under full load conditions. The results show that under full load conditions,as the speed increases,the peak of in-cylinder pressure,intake air flow and power of the GDI engine increase,but the maximum pressure increase rate decreases. At the same time,the brake thermal efficiency of the GDI engine first rises and then decreases with the increase of the speed. However,at the middle speed,the GDI gasoline engine has the maximum torque and does not change much with the speed.

关 键 词：GDI发动机 转速 外特性 缸内压力 有效燃油消耗率 

分 类 号：U464[机械工程—车辆工程]