TY - JOUR
T1 - Control of aged automotive selective catalytic reduction systems for consistent performances
AU - Ma, Yao
AU - Wang, Junmin
N1 - Publisher Copyright:
© 2017 The Franklin Institute
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2017/12
Y1 - 2017/12
N2 - This paper develops a consistent emission control method for automotive selective catalytic reduction (SCR) systems against variant aging conditions. SCR systems have been widely adopted on Diesel vehicles to reduce tailpipe NOx emissions thanks to their superior performance compared with other aftertreatment technology. While fresh SCRs have a high NOx removal efficiency, their NOx reduction performances will be significantly impaired as they get aged. To maintain the consistent emission performance of a SCR system over its entire duty life, it is necessary to design a robust and adaptive control method of SCR against the aging effects and ensure the consistent NOx reduction capability especially when SCR runs towards its end of life cycle. A control strategy that includes an ammonia coverage ratio tracking controller and a reference generator is derived and validated in simulation environment to account for various SCR aging conditions. The simulation results of US06 test cycle show that the proposed control strategy is able to maintain a consistent emission reduction performance under different aging conditions without generating excessive ammonia slip.
AB - This paper develops a consistent emission control method for automotive selective catalytic reduction (SCR) systems against variant aging conditions. SCR systems have been widely adopted on Diesel vehicles to reduce tailpipe NOx emissions thanks to their superior performance compared with other aftertreatment technology. While fresh SCRs have a high NOx removal efficiency, their NOx reduction performances will be significantly impaired as they get aged. To maintain the consistent emission performance of a SCR system over its entire duty life, it is necessary to design a robust and adaptive control method of SCR against the aging effects and ensure the consistent NOx reduction capability especially when SCR runs towards its end of life cycle. A control strategy that includes an ammonia coverage ratio tracking controller and a reference generator is derived and validated in simulation environment to account for various SCR aging conditions. The simulation results of US06 test cycle show that the proposed control strategy is able to maintain a consistent emission reduction performance under different aging conditions without generating excessive ammonia slip.
UR - http://www.scopus.com/inward/record.url?scp=85033710594&partnerID=8YFLogxK
U2 - 10.1016/j.jfranklin.2017.10.003
DO - 10.1016/j.jfranklin.2017.10.003
M3 - Article
AN - SCOPUS:85033710594
VL - 354
SP - 8094
EP - 8116
JO - Journal of the Franklin Institute
JF - Journal of the Franklin Institute
SN - 0016-0032
IS - 18
ER -