Inverse Model Allocation for Optimized Coordination of a Turbocharged SI Engine with Electric Supercharger

Electric boosting is a promising solution to improve the dynamic response of the air path system in downsized turbocharged engines. Unfortunately, typical electric supercharge controllers do not take into account the action of the wastegate actuator when generating the references for the e-compressor shaft speed, which can lead to overshoots and poor overall tracking performance. Leveraging on the presence of an existing feedback tracking controller for the wastegate and e-compressor, a plug-in module based on the inverse model allocation framework is design to coordinate the action of the two actuators. The module is tested using a model in the loop platform, based on a high-fidelity engine model in GT-Suite. Significant reduction of power losses are observed for a launch maneuver.

[1]  Yuxing Liu,et al.  Control of a two-stage turbocharged diesel engine air path system for mode transition via feedback linearization , 2016, 2016 American Control Conference (ACC).

[2]  A. Serrani,et al.  Output regulation for over-actuated linear systems via inverse model allocation , 2012, 2012 IEEE 51st IEEE Conference on Decision and Control (CDC).

[3]  Baitao Xiao,et al.  Dynamic Pressure Ratio Allocation for Electric Supercharger and Turbocharger Coordination , 2018, 2018 Annual American Control Conference (ACC).

[4]  Lars Eriksson,et al.  Modeling of a turbocharged SI engine , 2002, Annu. Rev. Control..

[5]  Tor Arne Johansen,et al.  Control allocation - A survey , 2013, Autom..

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

[7]  Ricardo Martinez-Botas,et al.  Experimental Efficiency Characterization of an Electrically Assisted Turbocharger , 2013 .

[8]  Baitao Xiao,et al.  Frequency Separation Control of Series Sequential Boosting System With Electric Supercharger and Turbocharger , 2017 .

[9]  Luca Zaccarian,et al.  Dynamic allocation for input redundant control systems , 2009, Autom..

[10]  Dheeraj Bobba,et al.  Overview of Electric Turbocharger and Supercharger for Downsized Internal Combustion Engines , 2017, IEEE Transactions on Transportation Electrification.

[11]  Richard Burke.  A Numerical Study of the Benefits of Electrically Assisted Boosting Systems , 2015 .

[12]  Elbert Hendricks,et al.  Modelling of the Intake Manifold Filling Dynamics , 1996 .

[13]  Andrea Serrani,et al.  Predictive inverse model allocation for constrained over-actuated linear systems , 2016, Autom..

[14]  Yuxing Liu,et al.  A Scalable Modeling Approach for the Simulation and Design Optimization of Automotive Turbochargers , 2015 .