采用快速混合燃烧过程提高柴油机功率密度  

Improvement of the engine power density by application of fast mixing combustion process

作　　者：徐元利[1] 焦志勇[1] 孙苗钟[1] 周玉存[1] 谈炳发[1] 

机构地区：[1]天津科技大学机械工程学院,天津300222

出　　处：《机械设计》2013年第5期85-88,共4页Journal of Machine Design

基　　金：天津大学内燃机燃烧学国家重点实验室开放基金资助项目(K2013-6)

摘　　要：在原有单缸机的基础上,采用较小柱塞直径、较大行程P型喷油泵,提高进气涡流转速和排气道流通系数,配合供油提前角和进气压力的合理匹配,实现快速混合燃烧过程,使单缸机的功率密度提高20%左右。燃烧过程的测量结果表明,较小柱塞直径喷油泵的采用抑制了速燃期放热速度,从而获得较小的工作粗暴度和最高燃烧压力;提高进气涡流转速,保证了快速混合燃烧过程的实现,从而获得较高热效率。Based on the baseline single-cylinder engine, a fast mixing combustion process was realized to improve the engine power density of about 20 percent by the application of P-type injection pump with smaller diameter and larger stroke plunger, increase of swirl revolution and discharge coefficient of exhaust port, and rea- sonable match of injection timing and inlet air parameters. The re- suits indicate that an utilization of injection pump with small diame- ter plunger reduces heat release rate during the fast combustion pe- riod and obtains lower combustion roughness and maximum combus- tion pressure, and that an increase of swirl revolution ensures fast mixing combustion process to occur and obtained high thermal effi- ciency.

关 键 词：快速混合燃烧过程 最高燃烧压力 工作粗暴度 功率密度 

分 类 号：TK427[动力工程及工程热物理—动力机械及工程]