Experimental validation of a virtual engine-out NOx sensor for diesel emission control

Motivated by automotive emission legislations, a Virtual N O x sensor is developed. This virtual sensor consists of a real-time, phenomenological model that computes engine-out N O x by using the measured in-cylinder pressure signal from a single cylinder as its main input. The implementation is made on a Field Programmable Gate Array–Central Processing Unit architecture to ensure the N O x computation is ready at the end of the combustion cycle. The Virtual N O x sensor is tested and validated on an EURO-VI Heavy-Duty Diesel engine platform. The Virtual N O x sensor is proven to meet the accuracy of a production N O x sensor for steady-state conditions and has better frequency response compared to the production N O x sensor.

[1]  Marco Sorrentino,et al.  Real-Time Estimation of Engine NOx Emissions via Recurrent Neural Networks , 2010 .

[2]  Bengt Johansson,et al.  Validation of a Novel Self Tuning Gross Heat Release Algorithm , 2008 .

[3]  Xlj Xander Seykens.  Development and validation of a phenomenological diesel engine combustion model , 2004 .

[4]  Thomas Körfer,et al.  Verschärfte Anforderungen an die Luftpfadregelung bei Nutzfahrzeugmotoren , 2008 .

[5]  J. Heywood,et al.  Experimental and Theoretical Study of Nitric Oxide Formation in Internal Combustion Engines , 1970 .

[6]  Konstantinos Boulouchos,et al.  Virtuelle Sensoren für Dieselmotoren , 2018 .

[7]  Paul Mentink,et al.  Development and Application of a Virtual NOx Sensor for Robust Heavy Duty Diesel Engine Emission Control , 2017 .

[8]  Thomas A. Brewbaker,et al.  Limitations of Real-Time Engine-Out NOx Estimation in Diesel Engines , 2017 .

[9]  Per Tunestål,et al.  Estimation of the In-Cylinder Air/Fuel Ratio of an Internal Combustion Engine by the Use of Pressure Sensors , 2001 .

[10]  Xlj Xander Seykens,et al.  Automated Model Fit Method for Diesel Engine Control Development , 2014 .

[11]  Jon Rigelsford,et al.  Embedded Robotics: Mobile Robot Design and Applications with Embedded Systems , 2004 .

[12]  Jose J. Lopez,et al.  Semiempirical in-cylinder pressure based model for NOX prediction oriented to control applications , 2011 .

[13]  Dejan Kihas,et al.  Engine-Out NOx Models for on-ECU Implementation: A Brief Overview , 2015 .

[14]  Steven W. Smith,et al.  The Scientist and Engineer's Guide to Digital Signal Processing , 1997 .