Fuel and Combustion

Fuel and Combustion

A New Thermodynamic Model for Determination of Cylinder Volume Deformation and TDC Position

Authors
Rahim Ebrahimi
Shadi Saboji
Faculty of Agriculture, Department of Agricultural Machinery Mechanics, Shahrekord University, Shahrekord, Iran
Abstract
Thermodynamic models based on measured cylinder pressure versus crank angle are used to analyze the combustion characteristics in the internal combustion engine. The results of the thermodynamic models are inevitably error-prone. Therefore, in this paper, a new thermodynamic model under motoring conditions is developed for determination of parameters such as TDC position, offset in measured cylinder pressure, cylinder volume deformation and clearance volume. The model is validated using TDC position and offset in measured cylinder pressure obtained from experimental data. Accordingly, a satisfactory agreement is yielded between the results.
Keywords
Internal combustion engine
Cylinder pressure
Polytropic model
Measurement errors
1.     M. Vareshkian, H. Talati, F. Ghasemi and A. Sohrabi, “Multidimensional Combustion Simulation and Analytical Solution of Wall Heat Condition in DI Diesel Engine,” Applied Science, 8, No. 21, pp. 3806-3816, 2008.
2.     R. Ebrahimi, “Predition of Auto-Ignition delay in HCCI Engine,” Fuel and Combustion, 1, No. 1, pp. 41-51, 2008, (In Farsi).
3.     R. Ebrahimi and S. Besharati, “An Experimental Compression of Spark Ignition Engine with Gasoline and Natural Gas Fuels,” Fuel and Combustion, 3, No. 1, pp. 75-85, 2010, (In Farsi).
4.     J. B. Heywood, Internal Combustion Engine Fundamentals, McGraw-Hill, 1982.
5.     C. A. Amann, “Cylinder-Pressure Measurement and Its Use in Engine Research,” SAE Paper 852067, 1985.
6.     F. Payri, S. Molina, J. Martın and O. Armas, “Influence of Measurement Errors and Estimated Parameters on Combustion Diagnosis,” Applied Thermal Engineering, 26, No. 2-3, pp. 226-236, 2006.
7.     M. Lapuerta, O. Armas and V. Bermudez, “Sensitivity of Diesel Engine Thermodynamic Cycle Calculation to Measurement and Estimated Parameters,” Applied Thermal Engineering, 20, No. 9, pp. 843-861, 1999.
8.     E. Pipitone, A. Beccari and S. Beccari, “The Experimental Validation of a New Thermodynamic Method for TDC Determination,” SAE Paper 2007-24-0052, 2007.
9.     M. J. Stas, “Thermodynamic Determination of TDC in Piston Combustion Engines,” SAE paper 960610, 1996.
10.  M. Tazerout, O. Le Corre and S. Rousseux, “TDC Determination in IC Engines Based on the Thermodynamic Analysis of the Temperature-Entropy Diagram,” SAE paper 1999-01-1489, 1999.
11.  M. Tazerout, O. Le Corre and P. Stouffs, “Compression Ratio and TDC Calibrations using Temperature-Entropy Diagram,” SAE paper 1999-01-3509, 1999.
12.  M. J. Stas, “A Universally Applicable Thermodynamic Method for TDC Determination,” SAE paper 2000-01-0561, 2000.
13.  H. Chang, Y. Zhang and L. Chen, “An Applied Thermodynamic Method for Correction of TDC in the Indicator Diagram and its Experimental Confirmation,” Applied Thermal Engineering, 25, No. 5-6, pp.759-768, 2005.
14.  M. Klein, L. Eriksson and J. A. Slund, “Compression Ratio Estimation Based on Cylinder Pressure Data,” Control Engineering Practice, 14, No. 3, pp.197-211, 2006.
15.  G. Van Wylen, R. Sonntag and C. Borgnakke, Fundamentals of classical thermodynamics, 4th Edition, John Wiley & Sons, 1994.
16.  P. Tunestal, “Estimation of the In Cylinder Air/Fuel Ratio of an Internal Combustion Engine by the Use of Pressure Sensors,” PhD Thesis, Department of Heat and Power Engineering, Lund Institute of Technology, Sweden, 2001.
17.  S. Saboji, “Estimation of Parameters and Calculation of Errors Created with Heat Release Model in Internal Combustion Engine,” Ms Thesis, Department of Mechanic Machinery Agricultural Engineering, Shahrekord University, Iran, (In Farsi).
18.  A. Kolchin and V. Demidov, Design of automotive engines, MIR Publisher Moscow, 1984.
19.  W. F. Stoecker, Design of Thermal Systems, 2nd Edition, Kogakusha, McGraw-Hill, 1980.
20.  B. R. Brown, “Combustion Data Acquisition and Analysis,” PhD Thesis, Department of Aeronautical and Automotive Engineering, Loughborpugh University, 2001.