Study of Atkinson cycle in two-stroke diesel engine with opposed pistons

• Autorzy: Mitianiec Władysław

Identyfikatory

DOI

10.19206/CE-2019-321

• Języki publikacji: EN

Abstrakty

EN

The paper presents possibilities of change working parameters of two-stroke diesel engine with opposed pistons. Obtaining of higher engine efficiency is realized by applying of Atkinson cycle. Modification of scavenging process by changing pistons' position connecting with two crankshafts enables asymmetrical scavenge timing. Decreasing of shorter time of closing exhaust ports before compression process and longer expansion process give higher engine work and with high charging ratio increases engine power. These types of engines are recently recommended for power plant stations. The paper includes full analysis of engine work with scavenge and combustion processes for different timing phases based on geometry of the CI Leyland L60 engine by using of CFD modelling and own 0D model. Simulation tests indicate a high scavenge efficiency, good penetration of injected fuel and fast combustion process. The work contains figures of pressure, temperature traces and emission of main chemical species in exhaust gases with comparison of engine works for different timing phases. Atkinson cycle in two-cycle work of engine and full combustion process enables to achieve high total efficiency. The study is an input for realization of such processes in a future of power plant engines with different fuelling systems.

Słowa kluczowe

EN

transport; two-stroke opposite piston engine; Atkinson cycle; scavenging; timing phases

PL

transport; silnik o tłokach przeciwbieżnych; obieg Atkinsona; wymiana ładunku

• Wydawca: Polskie Towarzystwo Naukowe Silników Spalinowych
• Czasopismo: Combustion Engines
• Rocznik: 2019
• Tom: R. 58, nr 3
• Strony: 121--128
• Opis fizyczny: Bibliogr. 11 poz., 1 il. kolor., rys., wykr.

Twórcy

autor

Mitianiec Władysław

• Faculty of Mechanical Engineering, Cracow University of Technology

Bibliografia

• [1] AMSDEN, A.A. et al. KIVA: a comprehensive model for 2-D and 3-D engine simulations. SAE Paper 850554. 1985.
• [2] EBRAHIMI, R. Thermodynamic modeling of an Atkinson cycle with respect to relative air-fuel ratio, fuel mass flow rate and residual gases. Acta Physica Polonica A. 2013, 124. DOI:10.12693/APhysPolA.124.29
• [3] FLINT, M., PIRAULT, J.P. Opposed piston engines: evolution, use, and future applications. SAE International. Warrendale. 2009.
• [4] FOSTER, D., HEROLD, R., LEMKE, J. et al. Thermodynamic benefits of opposed-piston two-stroke engines. SAE Technical Paper 2011-01-2216. 2011, DOI:10.4271/2011-01-2216
• [5] FROMM, L., HEROLD, R., KOSZEWNIK, J., REGNER, G. Modernizing the opposed-piston engine for more efficient military ground vehicle application. 2012 NDIA Ground Vehicle Systems Engineering and Technology Symposium. Michigan, August 14-16, 2012.
• [6] HEYWOOD, J. Internal Combustion Engine Fundamentals. McGraw-Hill. New York, 1988.
• [7] http://en.wikipedia.org/wiki/Atkinson_cycle
• [8] MITIANIEC, W. Fundamentals of fuel injection and emission in two-stroke engines. Nova Science Publisher. New York 2018.
• [9] NOBUKI, K., KIYOSHI, N., TOSHIHIRO, K. Development of new 1.8-l engine for hybrid vehicles. SAE Technical Paper 2009-01-1061. 2009.
• [10] REGNER, G. et al. Modernizing the opposed piston two-stroke diesel engine for more efficient commercial vehicle applications. Achates Power, Inc. San Diego 2012.
• [11] SENDYKA, B., SOCHAN, A. Increase of the total efficiency using the Atkinson cycle in the spark ignition engine. Journal of KONES Powertrain and Transport. 2009, 16(2).

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).