超多喷孔油嘴喷油规律试验研究  

Experimental Investigation on Fuel Injection Rate of UMH Nozzle

作　　者：缪雪龙[1] 王先勇[1] 俞建达[1] 洪建海[1] 郑金保[1] 房志红[1] 黄震[2] 乔信起[2] 

机构地区：[1]无锡油泵油嘴研究所,江苏无锡214063 [2]上海交通大学动力机械及工程教育部重点实验室,上海200030

出　　处：《内燃机学报》2008年第4期307-312,共6页Transactions of Csice

基　　金：国家重点基础研究计划资助项目(2007CB21007)

摘　　要：试验研究了一种具有上下两层喷孔、喷孔总流通面积比传统油嘴大得多的超多喷孔喷油嘴,为了探索其是否有利于在柴油机上组织预混合燃烧,在EFS喷油泵综合性试验台上对其进行了喷油规律的测试,并与传统油嘴的喷油规律进行了对比。发现在循环喷油量较小时,超多喷孔油嘴与传统油嘴相比喷油速率变化不显著,但随着循环喷油量的增加、喷射压力的提高,超多喷孔油嘴与传统油嘴相比具有较高的喷油速率、较大的累积喷油量、较短的喷射持续期,这些特性非常有利于在柴油机上组织预混合燃烧。In this paper, an ultra-multi-hole （UMH） injection nozzle that has the upper layer and the below layer holes was investigated. In order to validate the feasibility of the UMH nozzle for the premixed combustion in diesel engines, the fuel injection rate of this UMH nozzle was measured and compared with that of conventional nozzle in the EFS test bench. The results showed that little influence on fuel injection rate over conventional injection nozzle at the smaller amount of fuel injection with the UMH nozzle. However UMH nozzle has the higher injection rate, the larger accumulated fuel injection amount and the shorter injection duration with the increase of fuel injection amount and injection pressure. These advantages are favorable to the premixed combustion in diesel engines.

关 键 词：超多喷孔油嘴 喷油速率 预混合燃烧 

分 类 号：TK427[动力工程及工程热物理—动力机械及工程]