TO STUDY PERFORMANCE OF TWO STROKE ENGINE WITH MODIFIED INTAKE SYSTEM

Abstract

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