Affiliation:
1. Department of Mechanical Engineering, McMaster University, Hamilton, ON L8S 4L7, Canada e-mail:
Abstract
Urea-based selected catalytic reduction (SCR) systems are effective ways in diesel engine after-treatment systems to meet increasingly stringent emission regulations. To achieve high NOx reduction efficiency and low NH3 slip, the control of the SCR system becomes more challenging, especially in transient operating conditions with model uncertainties. To effectively address this issue, this paper proposed a compound control strategy with a switching mechanism between an active disturbance rejection (ADR) controller and a zero-input controller. The ADR controller estimates and rejects the total (internal and external) disturbances from the SCR system when the exhaust gas temperature is high and its variation is small. The zero-input controller is used to lower ammonia surface coverage ratio to avoid high ammonia slip when exhaust gas temperature suddenly rises. The proposed control strategy is validated through a high-fidelity GT-Power simulation for a light-duty diesel engine over steady states and federal test procedure (FTP-75) test cycle. Its effectiveness is demonstrated especially in rapidly transient conditions with model uncertainties.
Subject
Computer Science Applications,Mechanical Engineering,Instrumentation,Information Systems,Control and Systems Engineering
Reference28 articles.
1. Kinetic Considerations of H2 Assisted Hydrocarbon Selective Catalytic Reduction of NO over Ag/Al2O3: II. Kinetic Modeling;Appl. Catal.,2006
2. Hsieh, M.-F., and Wang, J., 2010, “An Extended Kalman Filter for Ammonia Coverage Ratio and Capacity Estimations in the Application of Diesel Engine SCR Control and Onboard Diagnosis,” Proceedings of American Control Conference, Baltimore, MD, June 30–July 2, pp. 5874–5879. 10.1109/ACC.2010.5530516
3. Review of Diesel Emissions and Control,2010
4. Experimental Demonstration of a New Model-Based SCR Control Strategy for Cleaner Heavy-Duty Diesel Engines;IEEE Trans. Control Syst. Technol.,2011
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