In this project paper, we modified the air intake into the cylinder in a single cylinder, two stroke air
cooled engine (two-wheeler TVS-50XL 50 cc bike) to increase the fuel efficiency. At normal condition, the vehicle
which is taken for our project, gives 45 to 50 Km, per liter of petrol. The fuel economy can be achieved up to 50 to 65
Km per liter by pre-heating of air to a particular temperature causes an increase of 10 Km per liter of petrol. The preheating
of intake air is achieved by introducing an air pre-heater in the exhaust pipe of the vehicle. The air inlet to the
engine is fed through the air pre-heater in counter action for effective heat transfer. So for this type of system has not
been introduced in two wheelers, this may be very useful to two wheelers without any complication and maintenance.
But the pre-heater design depends on the exhaust pipe fitted to the particular two-wheeler. The design is simple, cheap
and does not give any trouble to the engine.