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.
出处
《机械设计》
CSCD
北大核心
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)
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
fast mixing combustion process
max combustionpressure
combustion roughness
power density
