Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników
2008 | 15 | 2 |

Tytuł artykułu

Determination of location of Top Dead Centre and compression ratio value on the basis of ship engine indicator diagram


Warianty tytułu

Języki publikacji



In the polytropic model of compression process, exponent of polytropic compression curve was replaced with a power polynomial in which the piston travel was used as its argument. It was shown that 3rd order polynomial is optimum one. In the model were taken into account the following: design parameters of cylinder, influence of cylinder wear andgas blow-by on compression process, error in determining the piston’s Top Dead Centre (TDC) location, measurement error due to indicator diagram’s truncation. The presented solution of the non-linear model is based on its partial linearization, use of the least squares method as well as on application of the optimum determination methods known in the theory of experiment. The model makes it possible to determine TDC location on indicator diagram dealing with combustion, determination of total compresion ratio, pressure value of indicator diagram truncation, as well as determination of maximum values of compression pressure on the diagrams in which self-ignition occurs before reaching the TDC

Słowa kluczowe








Opis fizyczny



  • Mechanic-Electric Faculty, Polish Naval University, Smidowicza 69, 81-103 Gdynia, Poland


  • 1. Baehr H.D.: Thermodynamik. Eine Einführung in die Grundlagen und ihre technischen Anwendungen. Springer, 1973 (edition in Russian, 1977)
  • 2. Benson R.S., Whitehouse N. D.: Internal combustion engines. Pergamon Press, 1979
  • 3. Cichy M.: Calculation of compression and decompression processes by means of the finite difference method (in Polish). Scientific Bulletin of Gdańsk University of Technology (Zeszyty Naukowe Politechniki Gdańskiej), Mechanics (Mechanika), no. 73, Gdańsk 1996
  • 4. Hartman K., Lezki E., Shäfer W.: Statistische Versuchplanung und-auswertung in der Stoffwirtschaft. VEB, Leipzig, 1974 (edition in Russian,1977)
  • 5. Polanowski S.: Errors arising from relating the piston TDC to zero points of derivatives of ship engine cylinder pressure function (in Polish, abstract in English). Proceedings of KONES Conference 2000, (saved in Warsaw Institute of Aeronautics)
  • 6. Polanowski S.: Main sources of measurement errors of mean indicated pressure of ship engines in service conditions (in Polish, abstract in English). Journal of KONES, 1995, (saved in Warsaw Institute of Aeronautics) Polanowski S., Errors in Toking MIP Measurements by Means of Microcomputer Combustion Pressure Analyzer, Journal of Polish CIMAC, Warsaw, 1992..
  • 7. Polanowski S.: Gaining diagnostic information from indicator diagrams of ship engines by using advanced methods of data processing (in Polish, abstract in English). Scientific Bulletin of Polish Naval University, no. 162 K/2, Gdynia 2005
  • 8. Polanowski S.: A study of analysis methods of indicator diagrams in the aspect of diagnostics of ship engines (in Polish). Scientific Bulletin of Polish Naval University, no. 169 A, Gdynia 2007
  • 9. Polanowski S.: TDC determination on combustion indicator diagram. Journal of KONES, 1999, Vol. 6, No 1-2, (saved in Warsaw Institute of Aeronautics)
  • 10. Polanowski S.: Wieloparametrowy model przebiegu ciśnienia sprężania w cylindrze silnika okrętowego. Scientific booklet Akademii Marynarki Wojennej, 1 (160), Gdynia 2005 (abstract in English)
  • 11. Polanowski S.: Wyznaczanie wykładników politropy sprężania dla pozyskania informacji diagnostycznej z wykresu indykatorowego silnika okrętowego. Conference materials KONES 2001.

Typ dokumentu



Identyfikator YADDA

JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.