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- W1567604244 abstract "Based on our error budget analysis, the urea SCR aftertreatment system is uncontrollable under EPA 2007emission level without an effective closed-loop control strategy. The objective of the closed-loop control is to improve transient response as well as reduce the steady state control error. But the inherent large dead time in the urea SCR aftertreatment system makes the closed-loop control a challenge. In this paper, an innovative closedloop control architecture is introduced, which combines model-based feedforward control with variable gainscheduling feedback control. Transient response is improved with the inverse-dynamic feedforward control and the variable-gain closed-loop control. The steady-state response is improved with the closed-loop control. Based on this new strategy, a controller is designed and validated under the simulation and test cell environment. Comparison with the baseline open-loop controller is also conducted. Finally, some conclusions are presented." @default.
- W1567604244 created "2016-06-24" @default.
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- W1567604244 date "2002-03-04" @default.
- W1567604244 modified "2023-10-14" @default.
- W1567604244 title "Model-based Closed-loop Control of Urea SCR Exhaust Aftertreatment System for Diesel Engine" @default.
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- W1567604244 doi "https://doi.org/10.4271/2002-01-0287" @default.
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