Nonlinear observer designs for diesel engine selective catalytic reduction (SCR) ammonia coverage ratio estimation
作者： Ming Feng Hsieh , Junmin Wang
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摘要: This paper presents several nonlinear observer designs to estimate diesel engine selective catalytic reduction (SCR) ammonia coverage ratio, which significantly affects the SCR NO x conversion and NH 3 slip, but is not directly measurable by onboard sensors. Sliding mode (SMO) technique was employed for of different ratio observers based on selections sensor measurements. The robustness with respect measurement uncertainties were theoretical analyzed. A full-vehicle model FTP75 test cycle simulation results show estimation accuracies in presence errors/uncertainties.
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