Control of diesel engines using NOx-emission feedback

Variations of engine-out emissions due to ageing, component drift or production tolerances pose serious problems to meet legislative restrictions on exhaust tailpipe pollutant emissions. This paper addresses feedback of the raw emissions for improved control of diesel engines. A discussion of issues regarding the inclusion of raw-emission feedback into the engine control structure is provided, and a novel control structure for combined feedback control of the air-path variables boost pressure and exhaust gas recirculation rate and of the NOx emissions is presented. The proposed control structure basically consists of an optimal linear output feedback controller and a setpoint-adaption loop on the exhaust gas recirculation rate. With this approach, a simple control structure is available requiring a marginal calibration effort to meet desired NOx-emission values. Unfavourable injection timing in connection with NOx control is minimized by adapting the exhaust gas recirculation rate setpoint. The performance of the proposed approach is demonstrated by experimental results.

[1]  Konstantinos Boulouchos,et al.  Characterization of Diesel Particulate Emissions in Heavy-Duty DI-Diesel Engines with Common Rail Fuel Injection Influence of Injection Parameters and Fuel Composition , 2001 .

[2]  O. Salvat,et al.  Passenger Car Serial Application of a Particulate Filter System on a Common Rail Direct Injection Diesel Engine , 2000 .

[3]  Hua Zhao.  Advanced Direct Injection Combustion Engine Technologies and Development , 2010 .

[4]  I. Kolmanovsky,et al.  Issues in Modelling and Control of Intake Flow In Variable Geometry , 2009 .

[5]  Mrdjan Jankovic,et al.  Constructive Lyapunov control design for turbocharged diesel engines , 2000, IEEE Trans. Control. Syst. Technol..

[6]  Lino Guzzella,et al.  Real-time model for the prediction of the NOx emissions in DI diesel engines , 2006, 2006 IEEE Conference on Computer Aided Control System Design, 2006 IEEE International Conference on Control Applications, 2006 IEEE International Symposium on Intelligent Control.

[7]  Konstantinos Boulouchos,et al.  Soot Emission Measurements and Validation of a Mean Value Soot Model for Common-Rail Diesel Engines during Transient Operation , 2009 .

[8]  Timothy V. Johnson,et al.  Review of diesel emissions and control , 2009 .

[9]  Francesco Borrelli,et al.  A model predictive control framework for industrial turbodiesel engine control , 2008, 2008 47th IEEE Conference on Decision and Control.

[10]  Lars Eriksson,et al.  EGR-VGT Control and Tuning for Pumping Work Minimization and Emission Control , 2010, IEEE Transactions on Control Systems Technology.

[11]  M. Elsener,et al.  Urea-SCR: a promising technique to reduce NOx emissions from automotive diesel engines , 2000 .

[12]  Scott B. Fiveland,et al.  A Predictive Ignition Delay Correlation Under Steady-State and Transient Operation of a Direct Injection Diesel Engine , 2003 .

[13]  Ezio Alfieri,et al.  Emissions-controlled diesel engine , 2009 .

[14]  Elbert Hendricks,et al.  Mean Value Modeling of a Small Turbocharged Diesel Engine , 1991 .

[15]  Ian Postlethwaite,et al.  Multivariable Feedback Control: Analysis and Design , 1996 .

[16]  Manfred Morari,et al.  A unified framework for the study of anti-windup designs , 1994, Autom..

[17]  Rolf Johansson,et al.  Multiple-Input Multiple-Output Model Predictive Control of a Diesel Engine , 2010 .

[18]  Lino Guzzella,et al.  Introduction to Modeling and Control of Internal Combustion Engine Systems , 2004 .

[19]  Huibert Kwakernaak,et al.  Linear Optimal Control Systems , 1972 .

[20]  Lars Eriksson,et al.  Modeling and Control of Turbocharged SI and DI Engines , 2007 .

[21]  Lino Guzzella,et al.  Control of diesel engines , 1998 .

[22]  Nicolas Jeuland,et al.  Performances and durability of DPF (diesel particulate filter) tested on a fleet of peugeot 607 taxis : Final results , 2004 .

[23]  Zoran Filipi,et al.  In-cylinder reduction of PM and NOx emissions from diesel combustion with advanced injection strategies , 2006 .

[24]  Lino Guzzella,et al.  Model-based detection and isolation of faults due to ageing in the air and fuel paths of common-rail direct injection diesel engines equipped with a λ and a nitrogen oxides sensor , 2008 .

[25]  L. del Re,et al.  Gain Scheduled $H_{\infty}$ Control for Air Path Systems of Diesel Engines Using LPV Techniques , 2007, IEEE Transactions on Control Systems Technology.