Knock combustion in dual fuel diesel engine

• Autorzy: Żółtowski A.

Identyfikatory

DOI

10.5604/12314005.1130523

• Języki publikacji: EN

Abstrakty

EN

This article presents the problem of the knock combustion in a dual fuel compression engine, in which additional fuel besides diesel oil was compressed natural gas (CNG). CNG was injected into the engine intake system and mixed with air supplying the engine. In this paper described the reasons of knock combustion, which occur with more intensity with the increase of methane content in engine fuel. The phenomenon of knock combustion in the dual fuel engine is difficult to eliminate, often impossible to avoid, and it forms a barrier limiting increase of methane share in the fuel. Also, this article contains the results of engine indicating and discussion on changes in the indicating diagrams caused by knock combustion. Carried out tests included engine indicating and numerical calculation of indicator diagrams with using spectral analysis and filtering cylinder pressure signals with high-pass filters. As a result of this calculation, several parameters describing intensity of knock combustion were determined. They allow to tell taking into account only cylinder pressure analysis if there is knock combustion inside engine combustion chamber or not. Knocking is an undesirable type of combustion in the engine, leading to excessive thermal and mechanical loading of the engine parts, causing premature wear of them. For this reason, this type of combustion should be eliminated from the engine operation and researchers of combustion processes must be provided with tools to detect and determine this kind of combustion.

Słowa kluczowe

EN

road transport; IC engines; alternative fuels; combustion process in engine

• 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. 4
• Strony: 547--553
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Żółtowski A.

• Motor Transport Institute Jagiellonska Street 80, 03-301 Warszawa, Poland tel.:[phone]

Bibliografia

• [1] Indicom Light version 1.6. Product Guide. October 2006, AT2237E.Rev.00
• [2] Pischinger, R., Engine indicating, AVL publishing, Graz 2002.
• [3] Selim, M., Sensitivity of dual fuel engine combustion and knocking limits to gaseous fuel composition. Energy Conversion and Management 45, 411-425, 2004.
• [4] Königsson, F., Advancing the Limits of Dual Fuel Combustion, Department of Machine Design, Royal Institute of Technology, Stockholm.
• [5] Nwafor, O., Knock characteristics of dual-fuel combustion in diesel engines using natural gas as primary fuel, Sadhana Vol. 27, 375-382, 2002.