A new and efficient mechanism for spark ignition engines

M.S. Shadloo (1) , R. Poultangari (2) , M.Y. Abdollahzadeh Jamalabadi (3) , M.M. Rashidi (4, 5)

1 LHEEA - Laboratoire de recherche en Hydrodynamique, Énergétique et Environnement Atmosphérique
2 WTIAU - West Tehran Islamic Azad University [Tehran]
3 Gyeongsang National University
4 Shanghai Key Lab of Vehicle Aerodynamics and Vehicle Thermal Management Systems
5 ENN-Tongji Clean Energy Institute of Advanced Studies

In this paper a new symmetrical crank and slider mechanism is proposed and a zero dimensional model is utilized to study its combustion performance enhancement in a four-stroke spark ignition (SI) engine. The main features of this new mechanism are superior thermodynamic efficiency, lower internal frictions, and lower pollutants. Comparison is made between its performance and that of the conventional four-stroke SI engines. Presented mechanism is designed to provide better fuel consumption of internal combustion engines. These advantages over standard engine are achieved through synthesis of new mechanism. Numerical calculation have been performed for several cases of different mechanism parameters, compression ratio and engine speed. A comprehensive comparison between their thermodynamic processes as well as vibration and internal forces has been done. Calculated efficiency and power diagrams are plotted and compared with performance of a conventional SI engine. Advantages and disadvantages of the proposed mechanism are discussed in details.

Mots clés: Crank and slider mechanism; Thermodynamics; Frictional performance; Internal friction; Spark ignition (SI) engine; Internal combustion engine

Domaines: Mécanique des fluides [physics.class-ph]

M.S. Shadloo, R. Poultangari, M.Y. Abdollahzadeh Jamalabadi, M.M. Rashidi. A new and efficient mechanism for spark ignition engines. Energy Conversion and Management, 2015, 96, http://dx.doi.org/10.1016/j.enconman.2015.03.017. ⟨10.1016/j.enconman.2015.03.017⟩. ⟨hal-01161691⟩