Controlled Load and Speed Transitions in a Multicylinder Recompression HCCI Engine

A model-based control strategy to track combustion phasing during load and speed transitions in the homogeneous charge compression ignition (HCCI) operating region of a multimode combustion engine is presented in this paper. HCCI transitions can traverse regions of high cyclic variability (CV), even if the steady state transition end points are stable with low CV. A control-oriented HCCI model for both the stable, low CV region and the oscillatory, high CV, late phasing region is used to design a controller that uses valve and fuel injection timings to track combustion phasing. Novel aspects of the controller include nonlinear model-inversion-based feedforward and gain scheduled feedback based on unburned fuel that reduces transient CV. Transitions tested on a multicylinder HCCI engine include load transitions at fixed engine speeds, simultaneous load, and speed transitions, and select FTP75 drive-cycle transitions with high load slew rates. Good combustion phasing tracking performance is demonstrated, and misfires are prevented.

[1]  Mingfa Yao,et al.  Progress and recent trends in homogeneous charge compression ignition (HCCI) engines , 2009 .

[2]  J. Christian Gerdes,et al.  Controller-Observer Implementation for Cycle-by-Cycle Control of an HCCI Engine , 2007 .

[3]  Gregory M. Shaver,et al.  Physics-Based Modeling and Control of Residual-Affected HCCI , 2013 .

[4]  S. Turns.  An Introduction to Combustion: Concepts and Applications , 2000 .

[5]  Fuquan Zhao,et al.  Homogeneous charge compression ignition (HCCI) engines : key research and development issues , 2003 .

[6]  S. Turns.  Introduction to Combustion , 1995, Aerothermodynamics and Jet Propulsion.

[7]  Anna G. Stefanopoulou,et al.  Stability Analysis in Homogeneous Charge Compression Ignition (HCCI) Engines With High Dilution , 2007, IEEE Transactions on Control Systems Technology.

[8]  Mahdi Shahbakhti,et al.  HCCI Engine Combustion Phasing Prediction Using a Symbolic-Statistics Approach , 2010 .

[9]  J. Willand,et al.  The Knocking Syndrome - Its Cure and Its Potential , 1998 .

[10]  J. Gerdes,et al.  Physics-Based Modeling and Control of Residual-Affected HCCI Engines , 2009 .

[11]  Erik Hellström,et al.  Controlling combustion phasing variability with fuel injection timing in a multicylinder HCCI engine , 2013, 2013 American Control Conference.

[12]  Li Jiang,et al.  Quantifying Cyclic Variability in a Multicylinder HCCI Engine With High Residuals , 2012 .

[13]  Robert M. Wagner,et al.  On the Nature of Cyclic Dispersion in Spark Assisted HCCI Combustion , 2006 .

[14]  Li Jiang,et al.  ON THE INFLUENCE OF COMPOSITION ON THE THERMALLY-DOMINANT RECOMPRESSION HCCI COMBUSTION DYNAMICS , 2011 .

[15]  Erik Hellström,et al.  Modeling cyclic dispersion in autoignition combustion , 2011, IEEE Conference on Decision and Control and European Control Conference.

[16]  J. Christian Gerdes,et al.  Model-Based Control of HCCI Engines Using Exhaust Recompression , 2010, IEEE Transactions on Control Systems Technology.

[17]  J. Christian Gerdes,et al.  Control of recompression HCCI with a three region switching controller , 2013 .

[18]  J. Christian Gerdes,et al.  Multi-Cylinder HCCI Control With Cam Phaser Variable Valve Actuation Using Model Predictive Control , 2012 .

[19]  Rolf Johansson,et al.  CLOSED-LOOP CONTROL OF COMBUSTION PHASING IN AN HCCI ENGINE USING VVA AND VARIABLE EGR , 2007 .

[20]  Erik Hellström,et al.  Reducing Cyclic Variability While Regulating Combustion Phasing in a Four-Cylinder HCCI Engine , 2014, IEEE Transactions on Control Systems Technology.

[21]  D. Assanis,et al.  Bridging the Gap between HCCI and SI: Spark-Assisted Compression Ignition , 2011 .

[22]  Erik Hellström,et al.  Influence of transitions between SI and HCCI combustion on driving cycle fuel consumption , 2013, 2013 European Control Conference (ECC).

[23]  J. Christian Gerdes,et al.  Modeling and Control of an Exhaust Recompression HCCI Engine Using Split Injection , 2012 .

[24]  Alf Isaksson,et al.  Design and performance of mid-ranging controllers , 1998 .

[25]  Erik Hellström,et al.  Cyclic Variability and Dynamical Instabilities in Autoignition Engines With High Residuals , 2013, IEEE Transactions on Control Systems Technology.

[26]  Erik Hellström,et al.  Experiments and analysis of high cyclic variability at the operational limits of spark-assisted HCCI combustion , 2012, 2012 American Control Conference (ACC).

[27]  Erik Hellström,et al.  Enabling large load transitions on multicylinder recompression HCCI engines using fuel governors , 2013, 2013 American Control Conference.

[28]  Lucien Koopmans,et al.  Cycle to Cycle Variations: Their Influence on Cycle Resolved Gas Temperature and Unburned Hydrocarbons from a Camless Gasoline Compression Ignition Engine , 2002 .

[29]  J. Christian Gerdes,et al.  Mid-ranging control of a multi-cylinder HCCI engine using split fuel injection and valve timings* , 2010 .

[30]  T.-W. Kuo,et al.  A mean-value model for control of homogeneous charge compression ignition (HCCI) engines , 2005, Proceedings of the 2004 American Control Conference.

[31]  Erik Hellström,et al.  Reference Governor for Load Control in a Multicylinder Recompression HCCI Engine , 2014, IEEE Transactions on Control Systems Technology.

[32]  Rolf Johansson,et al.  Hybrid Model Predictive Control of Exhaust Recompression Hcci , 2014 .

[33]  J. Christian Gerdes,et al.  Model predictive control of HCCI using variable valve actuation and fuel injection , 2012 .

[34]  John E. Dec,et al.  An investigation into lowest acceptable combustion temperatures for hydrocarbon fuels in HCCI engines , 2005 .

[35]  Li Jiang,et al.  Understanding the Dynamic Evolution of Cyclic Variability at the Operating Limits of HCCI Engines with Negative Valve Overlap , 2012 .

[36]  Robert M. Wagner,et al.  Modeling Cyclic Variability in Spark-Assisted HCCI , 2007 .

[37]  Mrdjan Jankovic,et al.  Nonlinear Observer-Based Control of Load Transitions in Homogeneous Charge Compression Ignition Engines , 2007, IEEE Transactions on Control Systems Technology.