Control of a turbocharged Diesel engine fitted with high pressure and low pressure exhaust gas recirculation systems

Exhaust gas recirculation is an effective way for reducing nitric oxides emissions in Diesel engine achieving low temperature combustion (LTC). Two strategies can be applied to recirculate burnt gas in a turbocharged Diesel engine using the high pressure loop or the low pressure loop. This paper describes a generic model based control structure for Diesel engines with dual-loop exhaust gas recirculation (EGR) and variable geometry turbocharger. An observer is designed to estimate the exhaust gas flow coming from the high pressure loop or from the low pressure loop. These estimates are used for the intake burnt gas fraction control. This approach avoids direct measurement or implementation of additional sensors. In addition, a generic model based control based on motion planning is adapted to the low pressure EGR system. The main advantage of the approach is that turbocharger and exhaust gas recirculation systems controllers have a limited number of calibration parameters. The observer and controller results are presented and validated on a LTC-Diesel engine with a dual-loop EGR system.

[1]  Elbert Hendricks,et al.  Compact and Accurate Turbocharger Modelling for Engine Control , 2005 .

[2]  Pierre Rouchon,et al.  Motion planning for experimental airpath control of a diesel homogeneous charge-compression ignition engine , 2008 .

[3]  Philippe Moulin,et al.  Analysis and control of the air system of a turbocharged gasoline engine , 2008, 2008 47th IEEE Conference on Decision and Control.

[4]  Junmin Wang,et al.  Air fraction estimation for multiple combustion mode diesel engines with dual-loop EGR systems , 2007, 2007 46th IEEE Conference on Decision and Control.

[5]  Martin Müller,et al.  Dynamic EGR Estimation for Production Engine Control , 2001 .

[6]  P. Rouchon,et al.  Air Path Estimation on Diesel HCCI Engine , 2006 .

[7]  Mrdjan J. Jankovic,et al.  EGR-VGT control schemes: experimental comparison for a high-speed diesel engine , 2000 .

[8]  Keith Glover,et al.  COMPARISON OF UNCERTAINTY PARAMETERISATIONS FOR H ∞ ROBUST CONTROL OF TURBOCHARGED DIESEL ENGINES , 2005 .

[9]  Keith Glover,et al.  Comparison of Uncertainty Parameterisations for H∞ Robust Control of Turbo charged Diesel Engines , 2003 .

[10]  Jonathan Chauvin,et al.  Torque-oriented control of an homogeneous charge compression ignition vehicle , 2008, 2008 47th IEEE Conference on Decision and Control.

[11]  Yiqun Huang,et al.  New Diesel Emission Control Strategy to Meet US Tier 2 Emissions Regulations , 2005 .

[12]  A. H. Glattfelder,et al.  Model-based control of the VGT and EGR in a turbocharged common-rail diesel engine: Theory and passenger car implementation , 2003 .

[13]  Philippe Moulin,et al.  Global Airpath Control for a Turbocharged Diesel HCCI Engine , 2008 .

[14]  Philippe Moulin,et al.  Model Based Control of Turbochargers: Application to a Diesel HCCI Engine , 2007, 2007 IEEE International Conference on Control Applications.

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

[16]  Ilya V. Kolmanovsky,et al.  Control of variable geometry turbocharged diesel engines for reduced emissions , 2000, IEEE Trans. Control. Syst. Technol..

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

[18]  Ilya Kolmanovsky,et al.  Turbocharger Modeling for Automotive Control Applications , 1999 .

[19]  Ilya Kolmanovsky,et al.  Application of input estimation techniques to charge estimation and control in automotive engines , 2002 .