In this paper, a novel approach for NOx generation modeling in heavy-duty (HD) Diesel engines is proposed. Only the indicated pressure and the speed measurements are used, standing on the assumption that all combustion phenomenona are reflected by the crank angle resolved pressure trajectory. A principal component analysis is performed to describe the information included in the pressure by means of a limited set of variables; this enables the use of simple identification techniques to derive a simple and reliable predictor, also suited for on-line estimation. The proposed strategy is implemented on a off-road HD Diesel engine and validated on a standard test cycle.
NOx virtual sensor design via in-cylinder pressure feature extraction
FORMENTIN, SIMONE;CORNO, MATTEO;SAVARESI, SERGIO MATTEO
2012-01-01
Abstract
In this paper, a novel approach for NOx generation modeling in heavy-duty (HD) Diesel engines is proposed. Only the indicated pressure and the speed measurements are used, standing on the assumption that all combustion phenomenona are reflected by the crank angle resolved pressure trajectory. A principal component analysis is performed to describe the information included in the pressure by means of a limited set of variables; this enables the use of simple identification techniques to derive a simple and reliable predictor, also suited for on-line estimation. The proposed strategy is implemented on a off-road HD Diesel engine and validated on a standard test cycle.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.