Increasing the accuracy of the mean indicated pressure determination by appointment of the TDC cylinder position

• Autorzy: Pawletko R.

Identyfikatory

DOI

10.5604/12314005.1133901

• Języki publikacji: EN

Abstrakty

EN

The paper describes the problems of mean indicated pressure determination and the piston TDC (Top Dead Centre) position impact on this parameter in marine diesel engines. Mean indicated pressure Pi is one of the most important diagnostic parameters of marine engines. On the basis of its parameter, the assessment of the technical condition of each cylinder as well as the regulation of injection equipment can be made. Most of the available electronic indicators enable automatic calculation of mean indicated pressure on the basis of progress indicator diagram. As the research shows the greatest impact on the accuracy of the designation mean indicated pressure has errors of piston TDC position. These errors can be significant and therefore this may lead to engine misdiagnosis. The actual piston TDC correction methods were discussed, and they justified the need of their use in marine engines, despite the wide use of methods of determining the angular position of the crankshaft. The original method of TDC correction based on the model of curve of the compression with the exponent of a polynomial was introduced. The proposed method of TDC correction has been verified for a different types of marine engines.

Słowa kluczowe

EN

Top Dead Centre determination; Mean Indicated Pressure accuracy; indicator diagram analysis

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2014
• Tom: Vol. 21, No. 2
• Strony: 251--258
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Pawletko R.

• Gdynia Maritime University, Faculty of Marine Engineering Morska Street 83, 81-225 Gdynia, Poland

Bibliografia

• [1] Polanowski, S., Determination of location of Top Dead Centre and compression ratio value on the basis of ship engine indicator diagram, Polish Maritime Research, No. 2(56), Vol. 15, 2008.
• [2] Polanowski, S., Studium metod analizy wykresow indykatorowych w aspekcie diagnostyki silników okrętowych, Akademia Marynarki Wojennej, Zeszyty Naukowe, Nr 169 A, Gdynia 2007.
• [3] Polanowski, S., Pawletko, R., Research of the influence of marine diesel engine Sulzer AL 25/30 load on the TDC position on the indication graph, Journal of KONES Powertrain and Transport, Vol. 17, No. 3, Warsaw 2010.
• [4] Software instructions for the electronic indicator PREMET, Release 07/2005, Lehmann & Michels GmbH, Rellingen 2005.
• [5] Staś, M. J., Thermodynamic Determination of T.D.C. In Piston Combustion Engines, SAE Paper No. 960610.
• [6] Tazerout, M., Le Corre, O., Rousseau S., TDC Determination in IC Engines Based on the Thermodynamic, SAE Paper No. 1999-01-1489.