The Szymkowiak’s over-expanded cycle in the rocker engine with the variable compression ratio - kinematics

• Autorzy: Szwaja Stanisław , Szymkowiak Mirosław

Identyfikatory

DOI

10.19206/CE-143157

• Języki publikacji: EN

Abstrakty

EN

The article discusses the innovative concept of the over-expanded thermodynamic cycle, the author of which is the Polish engineer-designer Mirosław Szymkowiak. This cycle is realized on the basis of a new and innovative, previously unknown design, of a piston-crankshaft linkage mechanism with the aid of an additional element known as a rocker arm. Additionally, the proposed mechanism allows for a smooth change of the compression/expansion ratio of the engine during its operation. In the beginning, the earlier conceptions of the rocker engine developed by Szymkowiak were presented, and then the main construction assumptions and kinematic calculations were described. It was confirmed, that the developed linkage has big potential in improving the engine's thermal efficiency by approximately 12% relative. Additionally, it significantly reduces the exhaust gas pressure, when the exhaust valve is opened, therefore, contributes to the reduction of the noise emitted by the engine.

Słowa kluczowe

EN

rocker; engine; linkage; over-expanded cycle; variable expansion ratio; variable compression ratio

PL

wahacz; silnik; połączenie; zmienny stopień rozprężania; zmienny stopień sprężania

• Wydawca: Polskie Towarzystwo Naukowe Silników Spalinowych
• Czasopismo: Combustion Engines
• Rocznik: 2022
• Tom: R. 61, nr 2
• Strony: 68--72
• Opis fizyczny: Bibliogr. 7 poz., il. kolor., fot., rys., wykr.

Twórcy

autor

Szwaja Stanisław

• Mechanical Engineering and Computer Science Faculty, Czestochowa University of Technology

• https://orcid.org/0000-0003-2528-5404

autor

Szymkowiak Mirosław

• alumnus from AGH - University of Science and Technology

Bibliografia

• [1] PatOP: Single-crankshaft opposed-piston engine http://www.pattakon.com/patop/CommerTS.gif
• [2] HILLMAN CAR CLUB OF SOUTH AUSTRALIA INC. https://www.sa.hillman.org.au/TS3.htm
• [3] SZYMKOWIAK, M., SZWAJA, S. New concept of a rocker engine - kinematic analysis. Journal of Kones. 2012, 19, 443-449. https://doi.org/10.5604/12314005.1138160
• [4] RYCHTER, T.J., TEODORCZYK, A., STONE, C.R. A theoretical study of a variable compression ratio turbocharged diesel engine. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy. 1992, 206(4), 227-238. https://doi.org/10.1243/PIME_PROC_1992_206_039_02
• [5] RYCHTER, T.J., TEODORCZYK, A. VR/LE engine with variable R/L during a single cycle. SAE Technical Paper 850206. 1985. https://doi.org/10.4271/850206
• [6] KOZAK, W. Crank and rocker piston assembly. Combustion Engines. 2013, 152(1), 10-27. https://doi.org/10.19206/CE-117009
• [7] MAGRYTA, P., PIETRYKOWSKI, K., BIAŁY, M. et al. The influence of load distribution in kinematic constraints of connecting rod on the results of the stress simulation. Combustion Engines. 2017, 170(3), 84-87. https://doi.org/10.19206/CE-2017-313

Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).