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The two stroke engine was developed to obtain a greater output from the same size of engine. The engine mechanism eliminates the valve arrangement making it mechanically simpler. Theoretically a two stroke engine develops twice the power of a comparable four stroke engine, thus making it more compact. Getting air into an engine is the key to making power and there are many ways to increase the air flow into the engine. There are such forced induction, nitrous system, better port and valve shapes to improve flow. But for this study the technique that has been selected were the better port size. The claims that this where the harnessing the inertia of the airs velocity to better fill the cylinders. Modification in intake port is made. Also use of different fuel metering jets is used for different A/F mixtures. At various throttle positions and with torque and speed as input, performance parameters of engine are calculated. Based on the results various performance curves are plotted. The objective of the project is to determine how much power improvement with the modification in intake system in compared to the original intake system. Modification to the engine without additional system attach to the engine operation were the best solution to have an optimum engine operation in term of torque and horsepower. To optimize the power and intake port flow produce by the engine modification were through a very limited value. The value is limited due to the restricted area of the engine production by the manufacturer. Hence modification must be planned carefully as over modification of the inlet port can end up with a device slower than its stock counterpart. Keywords: A/F mixtures, power improvement, intake port, engine modification
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The drastic depletion of petroleum fuel from the crust of earth will lead to energy crisis in future. Improving the efficiency of all the systems using petroleum products is a way to manage this scenario until an effective alternative is found. The application of thermocouple modules in automobiles is the result of recent significant development in material sciences. In this paper, an attempt has been made to experimentally investigate the performance parameters such as brake specific fuel consumption, total fuel consumption, brake thermal efficiency, mechanical efficiency, indicated thermal efficiency by preheating the intake air using a thermocouple module on a single cylinder four stroke spark ignition engine. The brake specific fuel consumption and total fuel consumption is found to decrease when the air is preheated indicating the reduction in the fuel consumption. The mechanical efficiency is observed to increase at all loads. The mechanical efficiency, brake thermal efficiency, indicated thermal efficiency have shown an increased value for the preheated intake than the stock intake.
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