Main Category :Energy Sub Category :Protection of the environment Leelananda Jayasuriya A typical construction of this internal combustion engine consists two banks of cylindersworking barrels arranged side by side of an oscillating shaft. The pistons are connected with straight piston rods, having a pin on its' sterm to engage inside a groove provided at mechanical linkage. The mechanical linkage is a rigid rod in which the central point is fixed to oscillating shaft. The drive force of the piston is transmitted from piston rod to oscillating shaft through mechanical linkage. I.C. Engine with oscillating shaft is claiming high performance, typically minimizing internal resistance. It features higher efficiency, higher power, lighter weight, least starting effort, fuel saving in idle running, and miniature starting power source.