Impact of Extended Expansion Stroke on Spark Ignition Engine Operation Indicators with Multiple Linkage System (SAE Paper 2020-01-2011)

2020-01-2011

09/15/2020

Features
Event
SAE Powertrains, Fuels & Lubricants Meeting
Authors Abstract
Content
Increasing the efficiency of an internal combustion engine is possible thanks to the use of an extended expansion stroke relative to the suction stroke. This solution was first patented by James Atkinson in the construction of an internal combustion engine in the XIX century. The article presents a solution using the principle of extended expansion stroke. In the design of Szymkowiak's proprietary engine, a conceptual crank-piston system was used with additional elements enabling the Atkinson cycle to be obtained. A 3D model was created based on which forces acting in the system were tested. The generated piston path profile allowed to characterize its movement. A mobile mesh of the combustion chamber was created, thanks to this a detailed CFD simulation was performed in the AVL Fire software. An important criterion was the assumption of adiabatic characteristics of processes during the combustion. This made it possible to isolate the system from the ambient and, as a consequence, thermal losses were avoided. The Extended Coherent Flame Model (ECFM) combustion model was used, which is characterized by high flexibility of usage in this type of numerical combustion simulations. The fuel used was gasoline. The equivalence ratio has been set to 1. The obtained thermodynamic indices of the combustion process in the spark ignition engine were analyzed and referred to the indices obtained from the conventional engine.
Meta TagsDetails
DOI
https://doi.org/10.4271/2020-01-2011
Pages
10
Citation
Daszkiewicz, P., Urbański, P., Bajerlein, M., Ziolkowski, A. et al., "Impact of Extended Expansion Stroke on Spark Ignition Engine Operation Indicators with Multiple Linkage System (SAE Paper 2020-01-2011)," SAE Technical Paper 2020-01-2011, 2020, https://doi.org/10.4271/2020-01-2011.
Additional Details
Publisher
Published
Sep 15, 2020
Product Code
2020-01-2011
Content Type
Technical Paper
Language
English