Single Cylinder Four Stroke Spark Ignition Engine- Thermodynamic Simulation Model

Abstract:- The performance of an engine whose basic design parameters are known can be predicted with the assistance of simulation programs. A thermodynamic model for the simulation of a single cylinder spark ignition engine running on Iso-octane fuel is presented. The simulation consists of compression, combustion and expansion processes. The model is based on the classical two-zone approach, wherein parameters like heat transfer from the cylinder, blow-by energy loss and heat release rate are also considered. The general fuel is specified by way of its C-H-O-N values. Curve-fit coefficients are then employed to simulate air and fuel data along with fuel-air composition and practical chemical equilibrium routines. The calculated data is then used to plot the various thermodynamic parameters with respect to crank angle. Simulation program is usable to set for varies compression ratios, engine speed, and engine sizes. Key words: Spark Ignition (SI) engine, Simulation model, Thermodynamic Modeling of Engines. I