关于NO减少柴油发动机的实验研究通过EGR与SCR相结合
Size Zhang1, Xuexuan Nie1, Yuhua Bi1
1Yunnan Key Laboratory of Internal Combustion Engine, Kunming University of Science and Technology, Kunming 650500, China.
ACS omega
|February 26, 2024
概括
使用AdBlue平衡废气循环 (EGR) 和选择性催化减排 (SCR) 是减少柴油发动机的氧化 (NOx) 排放的关键,同时管理燃料成本. 协调控制可以最大限度地减少排放和总体发动机成本.
科学领域:
- 内部燃烧发动机 内部燃烧发动机
- 环境工程 环境工程
- 汽车工程 汽车工程
背景情况:
- 柴油发动机面临严格的氧化物 (NOx) 排放法规.
- 废气循环 (EGR) 和选择性催化减排 (SCR) 是主要的排放控制技术.
- EGR可以增加燃油消耗,而SCR则需要AdBlue,从而影响发动机的整体经济性.
研究的目的:
- 评估NOx排放控制和柴油发动机中的流体成本之间的权衡.
- 分析EGR和SCR (AdBlue剂量) 对发动机性能和经济性的联合影响.
- 确定最佳的控制策略,以平衡减排和运营费用.
主要方法:
- 发动机测试是在各种负载 (25-100%) 的 1600 和 2100 转/分钟进行的.
- 后处理系统包括柴油氧化催化剂 (DOC),柴油颗粒过器 (DPF),SCR和滑催化剂 (ASC).
- 排气回流 (EGR) 的打开和AdBlue的剂量被系统地改变.
主要成果:
- 增加EGR开口减少了NOx排放,但增加了制动特定燃油消耗 (BSFC) 和排气温度.
- 更高的AdBlue剂量提高了NOx转化效率,接近接近零排放.
- 流体成本 (柴油+AdBlue) 随着NOx排放量下降而增加,受AdBlue/柴油价格比率的影响.
结论:
- 对EGR和AdBlue的协调控制对于实现低NOx排放和减轻总流体成本至关重要.
- 较低的AdBlue与柴油价格比率减少了EGR对流体成本的经济影响.
- 这项研究为优化柴油发动机中的EGR和尿素注入策略提供了指导.
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