Six Stroke Engine

The most difficult challenges in engine technology to increase engine thermal efficiency. Therefore two more additional strokes are the fifth stroke, which called water injection stroke (second power stroke) while the last stroke is called exhaust stroke is include in engine. In this paper the six stroke engine is described. The rapid vaporization of the water during the fifth stroke is similar to the combustion of the gasoline. The combustion convert chemical energy into usable power, and likewise, the vaporization of water converts waste heat energy into sable power .The automotive industry may soon be revolutionized by a new six - stroke design which adds a second power stroke, resulting in much more efficiency with less amount of pollution Otto cycle engine have very low thermal efficiency due to high amount of energy is lost in exhaust and also cooling of the engine. It is estimated about 35% of fuel is lost in exhaust of engine and 30% in cooling of engine. Out of the remaining 35% of energy of the fuel about 50% of energy gets converted into the work. Two extra additional stroke have to be added for increase the thermal efficiency and from add of the two additional stroke engine.