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In-Cylinder Thermodynamic Analysis for Performance Engine Development
Technical Paper
2012-01-1170
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This research describes several data processing and analysis techniques that can be used to quantify indicated torque losses associated with in-cylinder thermodynamic events. The detailed thermodynamic techniques are intended to aid the development of performance engines under high-load conditions. This study investigates potential IMEP gains that could be made to an engine based on evaluating cylinder and manifold pressure data collected during wide-open-throttle operation. Examination of the data can guide engine design changes by exposing inefficiencies that may have otherwise gone unnoticed. Examples of calibration adjustments and physical intake and exhaust manifold design changes are also presented to validate the data analysis techniques presented. The research data sets were recorded using a 5.3L V8 engine in conjunction with a highly-controlled transient dynamometer. Fast-response pressure transducers were used to measure crank angle resolved cylinder and manifold pressure over continuous engine speed sweeps. Data evaluation software was developed and used to analyze the data after they were collected. Through the evaluation of many engine parameters including: indicated torque, intake and exhaust manifold tuning, gas exchange, turbulence intensity, combustion phasing, etc. many sources of inefficiency were identified from the baseline engine configuration. The techniques described provide insight that enables both calibration and design changes which increase the engine torque output.
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Anderson, D., Callies, J., Xiao, B., and Prucka, R., "In-Cylinder Thermodynamic Analysis for Performance Engine Development," SAE Technical Paper 2012-01-1170, 2012, https://doi.org/10.4271/2012-01-1170.Also In
References
- Randolph, A. “Methods of Processing Cylinder-Pressure Transducer Signals to Maximize Data Accuracy,” SAE Technical Paper 900170 1990 10.4271/900170
- Patterson, G. Davis, R. “Geometric and Topological Considerations to Maximize Remotely Mounted Cylinder Pressure Transducer Data Quality,” SAE Int. J. Engines 2 1 414 420 2009 10.4271/2009-01-0644
- Randolph, A. “Cylinder-Pressure-Transducer Mounting Techniques to Maximize Data Accuracy,” SAE Technical Paper 900171 1990 10.4271/900171
- Soltis, D. “Evaluation of Cylinder Pressure Transducer Accuracy based upon Mounting Style, Heat Shields, and Watercooling,” SAE Technical Paper 2005-01-3750 2005 10.4271/2005-01-3750
- Davis, R. Patterson, G. “Cylinder Pressure Data Quality Checks and Procedures to Maximize Data Accuracy,” SAE Technical Paper 2006-01-1346 2006 10.4271/2006-01-1346
- Randolph, A. “Cylinder-Pressure-Based Combustion Analysis in Race Engines,” SAE Technical Paper 942487 1994 10.4271/942487
- Asmus, T. “Valve Events and Engine Operation,” SAE Technical Paper 820749 1982 10.4271/820749
- Asmus, T. “Perspectives on Applications of Variable Valve Timing,” SAE Technical Paper 910445 1991 10.4271/910445
- Stein, R. Galietti, K. Leone, T. “Dual Equal VCT - A Variable Camshaft Timing Strategy for Improved Fuel Economy and Emissions,” SAE Technical Paper 950975 1995 10.4271/950975
- Leone, T. Christenson, E. Stein, R. “Comparison of Variable Camshaft Timing Strategies at Part Load,” SAE Technical Paper 960584 1996 10.4271/960584
- Prucka, R. Filipi, Z. Assanis, D. Kramer, D. et al. “An Evaluation of Residual Gas Fraction Measurement Techniques in a High Degree of Freedom Spark Ignition Engine,” SAE Int. J. Engines 1 1 71 84 2009 10.4271/2008-01-0094
- Patterson, G. “A Technique for Processing Cylinder Pressure and Test Bed Data Sets for Engine Speed-Sweep Tests to Allow Reduced Testing Time with Enhanced Interpretation of Results,” SAE Technical Paper 2008-01-3006 2008 10.4271/2008-01-3006
- Krieger, R. Borman, G. “The Computation of Apparent Heat Release for Internal Combustion Engines,” American Society of Mechanical Engineers 66WA/DGP4 1966
- Rassweiler, G. Withrow, L. “Motion Pictures of Engine Flames Correlated with Pressure Cards,” SAE Technical Paper 380139 1938 10.4271/380139
- Abraham, J. Williams, F. Bracco, F. “A Discussion of Turbulent Flame Structure in Premixed Charges,” SAE Technical Paper 850345 1985 10.4271/850345
- Prucka, R. Lee, T. Filipi, Z. Assanis, D. “Turbulence Intensity Calculation from Cylinder Pressure Data in a High Degree of Freedom Spark-Ignition Engine,” SAE Technical Paper 2010-01-0175 2010 10.4271/2010-01-0175
- Prucka, R. Lee, T. Filipi, Z. Assanis, D. “Turbulence Intensity Calculation from Cylinder Pressure Data in a High Degree of Freedom Spark-Ignition Engine,” SAE Technical Paper 2010-01-0175 2010 10.4271/2010-01-0175
- Li, L. Tao, J. Wang, Y. Su, Y. et al. “Effects of Intake Valve Closing Timing on Gasoline Engine Performance and Emissions,” SAE Technical Paper 2001-01-3564 2001 10.4271/2001-01-3564
- Boretti, A. Villa, F. “Design of the Fiat Auto Corse ITC 96 Racing Engine - Part I: Valve Lift Profiles and Timings,” SAE Technical Paper 980124 1998 10.4271/980124
- Kohany, T. Sher, E. “Using the 2nd Law of Thermodynamics to Optimize Variable Valve Timing for Maximizing Torque in a Throttled SI Engine,” SAE Technical Paper 1999-01-0328 1999 10.4271/1999-01-0328
- Randolph, A. L. 2008 April 2008 Indication Experts Symposium
- Sammut, G. Alkidas, A. “Relative Contributions of Intake and Exhaust Tuning on SI Engine Breathing - A Computational Study,” SAE Technical Paper 2007-01-0492 2007 10.4271/2007-01-0492
- Brennan, S. Kee, R. Kenny, R. Fleck, R. et al. “A Theoretical and Experimental Study of Resonance in a High Performance Engine Intake System: Part I,” SAE Technical Paper 2006-01-3653 2006 10.4271/2006-01-3653
- Boretti, A. Secchi, D. “Design of the Fiat Auto Corse ITC 96 Racing Engine - Part II: Pipe Lengths and Diameters,” SAE Technical Paper 980125 1998 10.4271/980125
- Winterbone, D.E. Pearson, R.J. “Design Techniques for Engine Manifolds: Wave Action Methods for IC Engines,” Professional Engineering Publishing Limited London 1999