Performance and Emission Analysis of Two Stroke Four Spark Plug

This paper describes some results of the research in the area of multiple spark ignition engines In the single spark plug engine there is a high exhaust emission and low break thermal efficiency because of incomplete combustion .To overcome this problem new dual spark plug engine is developed. Dual spark ignition system has proved their potential in improving the performance of the engines and improved emissive characteristics as compared with the single spark plug ignition system. Recently a new type engine has been introduced which uses triple spark plugs at different location, controlled by an advanced electronic control unit. This advanced electronic control unit uses three different ignition timings with variable spark plug number. Experiments were conducted at different load conditions and different types of engines has proved that dual spark plug ignition engines are surely better than a single spark plug engine ,but triple spark ignition engines has proved their potential .It is experimentally investigated that in the single spark plug mode the centrally located spark plug is most effective and gives best performance. In the dual ,triple and four spark plug mode if the central location of the spark plug is not possible because of the design of the engine than spark plugs were considered to be located diametrically opposite to each other on cylinder head axis symmetrically. According to Dimensionless distance from the cylinder centre to spark plug location on cylinder head, rsd = rs/R, five locations (rsd = 0, 0.25, 0.50, 0.75, and 1.0) were considered. Inevitably rsd = 0 corresponds to the single spark arrangement that the plug is located at the centre. To comparison, single-spark plug configurations were also considered for other selected spark plug locations. Current paper investigate the effect of multi spark plug to the single spark plug on the basis of the performance of engine and emissive characteristics of engine. The result shown that the considerable improvement in the performance of engine output and considerable reduction in BSFC,HC and Co emission in multi spark plug mode.