摘要
本文研究了两种主流的尿素喷射系统(即非空气辅助式尿素喷射系统与空气辅助式尿素喷射系统)对柴油机的排放的影响,得出如下结论:在同一台样机上进行气助式和非气助式的ESC循环和ETC循环排放试验时,当电控数据标定相同时,气助式喷射系统的实际尿素喷射量较非气助式喷射系统低4%左右,且NOx排放结果较非气助式喷射系统略高;当实际尿素喷射量相同时,气助式喷射系统和非气助式喷射系统的NOx排放结果一致,即两种喷射系统对NOx的转化效率基本相同,但气助式喷射系统的尿素溢出量略高,尿素在SCR中结晶的风险较低,可以有效降低市场结晶故障风险。
This paper studies the influence of two main urea injection systems(namely non-air-assisted urea injection system and air-assisted urea injection system)on diesel engine emissions,and draws the following conclusions:When the air-assisted and non-air-assisted ESC cycle and ETC cycle emission tests were carried out on the same prototype,the actual urea emission of the air-assisted injection system was about 4%lower than that of the non-air-assisted injection system,and the NOx emission result was slightly higher than that of the non-air-assisted injection system.When the actual amount of urea injection is the same,the NOx emission results of the air-assisted injection system and the non-air-assisted injection system are consistent,that is,the conversion efficiency of the two injection systems is basically the same,but the urea overflow of the air-assisted injection system is slightly higher,and the risk of urea crystallization in SCR is low,which can effectively reduce the risk of crystallization failure in the market.
作者
朱莉莉
石魁
房瑞雪
Zhu Li-li;Shi Kui;Fang Rui-xue(Weichai Power Co.,Ltd.,Shandong Weifang 261061)
出处
《内燃机与配件》
2024年第19期45-47,共3页
Internal Combustion Engine & Parts
关键词
尿素
气助式
喷射系统
Urea
Air-assisted
Injection system
