台阶型和斜锥型燃烧室对高强化柴油机燃烧过程影响的试验研究  

Effects of Step and Tilted Lip Combustion Chamber on Combusion of Highly Intensified Diesel Engine

作　　者：臧建淋 马强 陈实 张伟民 ZANG Jianlin;MA Qiang;CHEN Shi;ZHANG Weimin(Military Representative Office in Datong,Military Representative Bureau in Beijing,Land Force Equipment Department,Datong 037036,China)

机构地区：[1]陆军装备部驻北京地区军事代表局驻大同地区军事代表室,山西大同037036

出　　处：《车用发动机》2024年第4期24-30,共7页Vehicle Engine

摘　　要：为了提高高强化单缸柴油机燃烧室内空气利用率、优化油气混合过程,设计了台阶型和斜锥型缩口燃烧室,通过试验方法得到喉口直径对燃烧过程的影响规律。口径为72 mm的台阶型缩口燃烧室能够在过量空气系数1.5~1.7条件下达到平均有效压力(BMEP)为2.6 MPa的目标,并具有较低的油耗、排温和烟度,燃烧持续期短;在相同BMEP(2.6 MPa)下,斜锥型缩口燃烧室比台阶型缩口燃烧室具有更低的油耗、排温和最高燃烧压力,放热速率更快、燃烧持续期更短。To optimize the fuel and air mixing process and improve the utilization rate of air in highly-intensified single-cylinder diesel engine,the re-entrant combustion chambers with step-typed lip and tilted lip were designed,and the influence law of throat diameter on combustion process was acquired by the experiment.By using the step-typed lip combustion chamber with a thoat diameter of 72 mm,the target of 2.6 MPa BMEP could be achieved under the excess air coefficient of 1.5~1.7,which had the characteristics of low fuel consumption,exhaust temperature and smoke and short combustion duration.The re-entrant combustion chamber with tilted lip presented lower fuel consumption,exhaust temperature and peak combustion pressure,faster heat release rate and shorter comustion duration than the counterpart with step lip under the same BMEP.

关 键 词：高强化柴油机 燃烧过程 燃烧室 结构设计 

分 类 号：TK423.2[动力工程及工程热物理—动力机械及工程]