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Effect of Piston Dynamic on the Working Processes of an Opposed-Piston Two-Stroke Folded-Cranktrain Engine
Technical Paper
2014-01-1628
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
An opposed-piston two-stroke folded-cranktrain diesel engine was studied in this paper. In order to achieve asymmetric scavenging, asymmetric angle between two crank throws were designed. However asymmetric crank-throw angle has direct effect on the piston dynamic, which affects engine performance. This paper investigated the characteristics of the piston dynamic on an opposed-piston two-stroke folded-cranktrain diesel engine; effects of the asymmetric angle on the piston displacement, velocity and acceleration were analyzed; further researches were done to studied the effect of piston dynamic on the gas exchange performance and in-cylinder performance. The results show that, larger asymmetric angle is positive for the scavenging efficiency but negative for combustion. The 8.5° CA asymmetric angle showed better fuel economical and IMEP due to better mix and combustion at 2200 r/min, while the 6° CA asymmetric angle showed better fuel economical and IMEP due to better scavenging efficiency at 1000 r/min.
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Zhang, Z., Zhao, C., Wu, D., Zhang, F. et al., "Effect of Piston Dynamic on the Working Processes of an Opposed-Piston Two-Stroke Folded-Cranktrain Engine," SAE Technical Paper 2014-01-1628, 2014, https://doi.org/10.4271/2014-01-1628.Also In
References
- Pirault , J.-P. and Flint , M. Opposed Piston Engines: Evolution, Use, and Future Applications SAE International Warrendale, PA 978-0-7680-1800-4 2009 10.4271/R-378
- Hofbauer , P. Opposed Piston Opposed Cylinder (opoc) Engine for Military Ground Vehicles SAE Technical Paper 2005-01-1548 2005 10.4271/2005-01-1548
- Franke , M. , Huang , H. , Liu , J. , Geistert , A. et al. Opposed Piston Opposed Cylinder (opoc™) 450 hp Engine: Performance Development by CAE Simulations and Testing SAE Technical Paper 2006-01-0277 2006 10.4271/2006-01-0277
- han-jun Xu , jin-ou Song , chun-de Yao et al. Simulation on In-Cylinder Flow on Mixture Formation and Combustion in OPOC Engine Transactions of CSICE 2009 27 395 400
- Xu S , Wang Y , Zhu T et al. Numerical analysis of two-stroke free piston engine operating on HCCI combustion Applied Energy 2011 88 3712 3725
- McGough , M. and Fanick , E. Experimental Investigation of the Scavenging Performance of a Two-Stroke Opposed-Piston Diesel Tank Engine SAE Technical Paper 2004-01-1591 2004 10.4271/2004-01-1591