New design of the five-stroke SI engine

• Autorzy: Noga M. , Sendyka B.
• Języki publikacji: EN

Abstrakty

EN

The paper describes design of the five-stroke engine developed in the Chair of Combustion Engines at Cracow University of Technology. The idea of five-stroke engine, in which the expansion ratio is significantly greater than the compression ratio has been presented by the Belgian engineer Gerhard Schmitz. The prototype of such an engine was made by Ilmor Engineering. Engine developers have released results of preliminary research, but there is no detailed information on the toxic exhaust emissions. For this reason, at Cracow University of Technology the research was undertaken to determine the impact of implementing the five-stroke cycle into the engine with spark ignition to reduce toxic emissions and increase total efficiency. To achieve this goal, the test engine was built, which is based on a concept similar to the idea of Gerhard Schmitz, with the difference that it has not been designed from the ground up, and it is based on an existing four-cylinder four-stroke engine. In comparison with the original solution, the engine built in Cracow has a completely different design of timing system, four valves per cylinder and petrol direct injection. This paper presents a detailed description of the engine design and the results of its preliminary research. The results of the tests of the five-stroke engine confirm an increase of specific torque and power (related to unit of engine displacement) and improve of total efficiency within a certain range of the engine map.

Słowa kluczowe

EN

five-stroke engine; spark ignition; additional expansion; increase of total efficiency

• 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: 2013
• Tom: Vol. 20, No. 1
• Strony: 239--246
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Noga M.

• Cracow University of Technology, Institute of Automobiles and Internal Combustion Engines Jana Pawła II Av. 37, 31-864 Kraków, Poland tel.:[phone], fax: [phone]

autor

Sendyka B.

• Cracow University of Technology, Institute of Automobiles and Internal Combustion Engines Jana Pawła II Av. 37, 31-864 Kraków, Poland tel.:[phone], fax: [phone]

Bibliografia

• [1] Alten, H., Illen, M., Schmitz, G., Thermodynamische Untersuchung eines 4-Taktmotors mit nachexpansion, Ilmor Engineering Report TD-103, 1999.
• [2] Basshuysen, R. van, Schaefer, F., Internal Combustion Engine. Handbook, Basics, Components, Systems and Perspectives, SAE International, Warrendale 2004.
• [3] Fröhn, U., et. al, Boost to the Max, Turbo News 01/2011, BorgWarner Turbo Systems Worldwide Headquarters GmbH, Kirchheimbolanden 2011.
• [4] Postrzednik, S., Żmudka, Z., Termodynamiczne oraz ekologiczne uwarunkowania eksploatacji tłokowych silników spalinowych, Wydawnictwo Politechniki Śląskiej, Gliwice 2007.
• [5] Randal, M., Audi A4 Owners Workshop Manual. Jan 2005 to Feb 2008, ISBN 978 1 84425 885 7, Haynes Publishing, Sparkford 2010.
• [6] Rychter, T., Teodorczyk, A., Teoria silników tłokowych, Wydawnictwa Komunikacji i Łączności, Warszawa 2006.
• [7] Schmitz, G., Five-stroke internal combustion engine, United States Patent No. 6553977B2, 2003.
• [8] www.motortrivia.com/section-innovation/0012-ilmor/ilmor.html - accessed on 20.0