Experimental Analysis of Jacket Cooling of S I Engine and Study of Operating Parameters and Emissions

About 17-26% of input energy to the spark ignition engine is lost as heat energy though the engine. This heat energy is removed by means of jacket cooling water. The temperature of the engine is required to be maintained within an optimum range for proper operation of the engine. Very high temperature of the engine leads to increase in the emissions and friction power (losses). Low engine temperature leads to improper vaporization of the fuel and thus starting problems. So the engine temperature needs to be maintained at an optimum value. The effects on various operating parameters and emission characteristics have been studied with the variation in the Engine Temperature maintained by varying the temperature of cooling water. Operating parameters like Friction Power, Mechanical Efficiency, Brake Thermal Efficiency, Brake Specific Fuel Consumption, Brake Mean Effective Pressure, and Emission characteristics like NOx, CO, HC's and Exhaust Gas Temperatures were observed and graphically represented. In this study it was attempted to deduce the temperature range of proper operation of the 3-cylinder Spark Ignited engine.