Understanding the Dynamic Evolution of Cyclic Variability at the Operating Limits of HCCI Engines with Negative Valve Overlap

An experimental study is performed for homogeneous charge compression ignition (HCCI) combustion focusing on late phasing conditions with high cyclic variability (CV) approaching misfire. High CV limits the feasible operating range and the objective is to understand and quantify the dominating effects of the CV in order to enable controls for widening the operating range of HCCI. A combustion analysis method is developed for explaining the dynamic coupling in sequences of combustion cycles where important variables are residual gas temperature, combustion efficiency, heat release during re-compression, and unburned fuel mass. The results show that the unburned fuel mass carries over to the re-compression and to the next cycle creating a coupling between cycles, in addition to the well known temperature coupling, that is essential for understanding and predicting the HCCI behavior at lean conditions with high CV.

[1]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[2]  John B. Heywood,et al.  Internal combustion engine fundamentals , 1988 .

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

[4]  Lucien Koopmans,et al.  A Four Stroke Camless Engine, Operated in Homogeneous Charge Compression Ignition Mode with Commercial Gasoline , 2001 .

[5]  Gary Kirkpatrick,et al.  Controlled Combustion in an IC-Engine with a Fully Variable Valve Train , 2001 .

[6]  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 .

[7]  Scott B. Fiveland,et al.  Compression Ratio Influence on Maximum Load of a Natural Gas Fueled HCCI Engine , 2002 .

[8]  D. Assanis,et al.  Homogeneous Charge Compression Ignition (HCCI) Engines , 2003 .

[9]  Tomonori Urushihara,et al.  Expansion of HCCI Operating Region by the Combination of Direct Fuel Injection, Negative Valve Overlap and Internal Fuel Reformation , 2003 .

[10]  Ingemar Denbratt,et al.  Demonstrating a SI-HCCI-SI Mode Change on a Volvo 5-Cylinder Electronic Valve Control Engine , 2003 .

[11]  Lars Eriksson,et al.  CHEPP - A Chemical Equilibrium Program Package for Matlab , 2004 .

[12]  Zoran Filipi,et al.  New Heat Transfer Correlation for an HCCI Engine Derived from Measurements of Instantaneous Surface Heat Flux , 2004 .

[13]  Dennis N. Assanis,et al.  Comparing Enhanced Natural Thermal Stratification Against Retarded Combustion Phasing for Smoothing of HCCI Heat-Release Rates , 2004 .

[14]  Bengt Johansson,et al.  Cylinder-to-Cylinder and Cycle-to-Cycle Variations at HCCI Operation With Trapped Residuals , 2005 .

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

[16]  K. Glover,et al.  Residual Gas Fraction Measurement and Estimation on a Homogeneous Charge Compression Ignition Engine Utilizing the Negative Valve Overlap Strategy , 2006 .

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

[18]  Johney B. Green,et al.  Modeling Cyclic Variability in Spark-Assisted HCCI , 2007 .

[19]  Robert M. Wagner,et al.  Understanding the transition between conventional spark-ignited combustion and HCCI in a gasoline engine , 2007 .

[20]  Rolf Johansson,et al.  HCCI Engine Modeling and Control Using Conservation Principles , 2008 .

[21]  John E. Dec,et al.  Comparing late-cycle autoignition stability for single- and two-stage ignition fuels in HCCI engines , 2007 .

[22]  Huang Zhen,et al.  Experimental study on the cycle-by-cycle variations of homogeneous charge compression ignition combustion using primary reference fuels and their mixtures , 2007 .

[23]  M. Shahbakhti,et al.  Characterizing the cyclic variability of ignition timing in a homogeneous charge compression ignition engine fuelled with n-heptane/iso-octane blend fuels , 2008 .

[24]  Sungbae Park,et al.  Simulation of misfire and strategies for misfire recovery of gasoline HCCI , 2008, 2008 American Control Conference.

[25]  Y. Mo,et al.  HCCI heat release rate and combustion efficiency: A couple KIVA multi-zone modeling study , 2008 .

[26]  Dennis N. Assanis,et al.  Model-Based Assessment of Two Variable CAM Timing Strategies for HCCI Engines: Recompression vs. Rebreathing , 2009 .

[27]  N. Wermuth,et al.  Enhancing Light Load HCCI Combustion in a Direct Injection Gasoline Engine by Fuel Reforming During Recompression , 2009 .

[28]  C. Edwards,et al.  Experimental study of recompression reaction for low-load operation in direct-injection homogeneous charge compression ignition engines with n-heptane and i-octane fuels , 2009 .

[29]  Christopher G. Mayhew,et al.  Reduced-order modeling for studying and controlling misfire in four-stroke HCCI engines , 2009, Proceedings of the 48h IEEE Conference on Decision and Control (CDC) held jointly with 2009 28th Chinese Control Conference.

[30]  A. F. Jungkunz,et al.  Reducing combustion variation of late-phasing HCCI with cycle-to-cycle exhaust valve timing control , 2010 .

[31]  Junmo Kang.  Sensitivity Analysis of Auto-ignited Combustion in HCCI Engines , 2010 .

[32]  Ronald K. Hanson,et al.  Determination of Cycle Temperatures and Residual Gas Fraction for HCCI Negative Valve Overlap Operation , 2010 .

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

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

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

[36]  Samveg Saxena,et al.  Maximizing Power Output in an Automotive Scale Multi-Cylinder Homogeneous Charge Compression Ignition (HCCI) Engine , 2011 .

[37]  A. F. Jungkunz,et al.  Combustion Phasing Variation Reduction for Late-Phasing HCCI Through Cycle-to-Cycle Pilot Injection Timing Control , 2011 .

[38]  Jiri Vavra,et al.  Assessment of Residual Mass Estimation Methods for Cylinder Pressure Heat Release Analysis of HCCI Engines With Negative Valve Overlap , 2011 .