This document summarizes a seminar presentation on pneumatic bikes. It describes the objectives of replacing conventional motorcycle engines with a pneumatic system to reduce pollution. The basic construction includes an air compressor, electric motor, torque sensor, and pneumatic cylinders. It explains the working methodology of using compressed air and cylinder reciprocation to power the bike. Speed and braking are controlled through air flow regulation. The pneumatic bike provides benefits of zero emissions but has limitations in speed and requires more maintenance compared to gasoline engines.

1. Presented By
HARI PRASAD.C.N
Mechanical Engg.
Guide By : Asst.Prof.RAGHAVENDRA.A
Dept. of Mechanical Engg.
SEMINAR
ON

2. CONTENTS
What Is Pneumatic Bike
Objectives
Construction
Working Methodology
Speed and Braking
Advantage
Dis-Advantage
Conclusion

3. A bike which use pressurize air as a fuel is
known as pneumatic bikes.
I.C. power engines are replaced by fluid power.
The power system in the vehicle is not by
combustion of fuel but by means of pressurized
fluid power (air).
If we arrange the whole system in a particular
manner then we can achieve it.
WHAT IS PNEUMATIC BIKE

4. OBJECTIVES
To replace the conventional two wheeler power
source by fluid power source.
To save the non-renewable source of energy.
To bring zero pollution factor.

5. CONSTRUCTION
Basic set up consist of four parts
 COMPRESSOR
• The compressor has a motor whose supply is
fed from a rechargeable battery.
• The air compressor increases the pressure of
gas by reducing the volume of gas as described
by the perfect gas laws.

6.  ELECTRIC MOTOR :
Electric motor is a rotary actuator which is
used initially to drive the vehicle to overcome the
initial torque required to drive the vehicle with
load.
Once the vehicle gains the initial momentum
and the running torque and a stipulated speed say
(20 km/hr), the power system is switched over to
the pneumatic system from the electrical.

7. TORQUE SENSOR:-
Torque sensor is a transducer which converts
the torque acting on the wheel into analog signal.
The signal is then send to the relays and thereby
playing an immigrant part in switching over the
power from motor to cylinder.
 The cylinders which now start reciprocating
become the drive source.

8. PNEUMATIC CYLINDER :-
Pneumatic cylinder is made to reciprocating
continuously.
They are of high precision and resolution
thereby giving approximately 450 strokes/min.
The pneumatic cylinder is prime actuator once
the power system transfers to pneumatic system.

9. Pneumatic Cylinder

10. WORKING METHODOLOGY
The principle of generation of power in a two
wheeler is by means of fluid power and there by
replacing the power system of conventional
engine.
This is achieved by the continuous
reciprocation of pneumatic cylinder where its
rod ends are linked to the crank of an engine.

11. The linear reciprocation of cylinder is
converted into a rotary motion.
The vehicle runs on the power produced by the
air.
Power stroke obtained is directly proportional
to the pressure at which the air is sent.

12. Pneumatic Bikes

13. SPEED AND BRAKING
Speed is regulated by means of metering valve
which meters the flow of the air inside the
cylinder.
The valve can be used to regulate the flow to
increase and as well as decrease.
The regulation would give the speed variation
or the vehicle.
Braking is achieved to stop the vehicle at the
instantaneous hindrances.

14. This is achieved by metering the valve which
completely stops the air flow.
Note once the torque increase the motor is
employed so in order to stop this, the hand brake
is applied which act as switch between the supply
and the motor, eventually cutting of the supply.

15. ADVANTAGES:-
As air is used as a fuel it produces zero pollution
these bikes are ecofriendly.
Silent in operation, thus reduces noise
pollution.
These bikes are light in weight.
It reduces the consumption of natural fuels like
petrol, diesel etc.

16. DISADVANTAGES:-
Less speed (up to 60-70 km/h).
Frequent maintenance is required.
It has a high cost.

17. CONCLUSION:-
Even through the vehicle is in its early stage of
development.
Thus if we replace conventional I.C. power
system by fluid power system then it is always
beneficial to us.

18. REFERENCES
http://www.twowheelers.com
http://www.automobiles.comlpneu-engine.htm
http://ourworld.compuserve/v-4engines.htm

19. THANK YOU