Effects of Particle Filters and Selective Catalytic Reduction on Heavy-Duty Diesel Drayage Truck Emissions at the Port of Oakland

2015 ◽  
Vol 49 (14) ◽  
pp. 8864-8871 ◽  
Author(s):  
Chelsea V. Preble ◽  
Timothy R. Dallmann ◽  
Nathan M. Kreisberg ◽  
Susanne V. Hering ◽  
Robert A. Harley ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
Particle Filters ◽  
Catalytic Reduction ◽  
Heavy Duty ◽  
Heavy Duty Diesel ◽  
Port Of Oakland

scholarly journals Selective catalytic reduction of NOx by NH3 for heavy-duty diesel vehicles

2014 ◽  
Vol 35 (9) ◽  
pp. 1438-1445 ◽  
Author(s):  
Fudong Liu ◽  
Wenpo Shan ◽  
Dawei Pan ◽  
Tengying Li ◽  
Hong He
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Heavy Duty ◽  
Diesel Vehicles ◽  
Reduction Of Nox ◽  
Heavy Duty Diesel

Urea injection control strategy in urea-selective catalytic reduction for heavy-duty diesel engine under transient process

2019 ◽  
pp. 146808741986063
Author(s):  
Binyang Wu ◽  
Longfei Deng ◽  
Yize Liu ◽  
Dezeng Sun ◽  
Wanhua Su
Keyword(s):  
Selective Catalytic Reduction ◽  
Transient Process ◽  
Catalytic Reduction ◽  
Heavy Duty ◽  
Ammonia Slip ◽  
Ammonia Storage ◽  
Heavy Duty Diesel Engine ◽  
Injection Control ◽  
Storage Area ◽  
Heavy Duty Diesel

A urea injection control strategy for urea-selective catalytic reduction under a transient process is investigated on a heavy-duty diesel engine test bench in this study. The aim is to improve NO x conversion efficiency and reduce ammonia slip. With the selective catalytic reduction system as the research object, an open thermodynamic conservation system is established. The conservation relationship in the process of urea injection, NO x reduction reaction, ammonia storage, and ammonia slip is investigated. The ideal target ammonia storage area and the ammonia storage characteristics during the transient process are studied. The ammonia storage area and boundary, which change with the transient temperature, are established. Correction of real-time ammonia injection is further deduced from the boundary of the area. The world harmonized transient cycle test cycle result showed that compared to feed-forward control, the NO x conversion efficiency increased by 16% and the NH3 slip decreased by 75% when using the proposed real-time ammonia storage-management control method.

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