Compressed air vehicle

COMPRESSED AIR ENGINEA REVOLUTION IN AUTOMOBILE

DONE BY PALLAV, SMEET, KULDEEP ,PANKAJ ANIL,ANKUSH. CONTEXTWhat is the Compressed Air Engine

Whats the worth.

Assembling of the various sections in the Air engine.

Conclusion

Compressed air Engine A compressed-air vehicle is powered by an air engine, using compressed air, which is stored in a tank. Instead of mixing fuel with air and burning it in the engine to drive pistons with hot expanding gases, compressed air vehicles (CAV) use the expansion of compressed air to drive their pistonsCONTD.The laws of physics dictate that uncontained gases will fill any given space. The easiest way to see this in action is to inflate a balloon. The elastic skin of the balloon holds the air tightly inside, but the moment you use a pin to create a hole in the balloon's surface, the air expands outward with so much energy that the balloon explodes. Compressing a gas into a small space is a way to store energy. When the gas expands again, that energy is released to do work. That's the basic principle behind what makes an air car go.WHY COMPRESSED AIR ENGINEHigh torque for minimum volume

Air on its own, is non-flammable

Compressed-air tanks can be disposed of or recycled with less pollution than batteries

The tank may be able to be refilled more often and in less time than batteries can be recharged.

Compressed air technology reduces the cost of vehicle production by about 20%, because there is no need to build a cooling system, fuel tank, Ignition Systems CONTD. . The mechanical design of the engine is simple and robust.

Compressed-air vehicles are unconstrained by the degradation problems

6PROJECT DESIGNComponents used1. Crank shaft 22. Connecting rod -23. Pneumatic cylender-24. Solenoid valve-45. Bearing-26. Bearing stand7. Tyre-38. Compressor9. Pneumatic pipe10. Connectors12. Body base13. Electric circuit

About our project construction

1. We arrange two crank shafts of two wheeler scooter

CONTD.

2. We adjoin both crank shafts with the distance angle of 90 degree for smooth turning

CONTD.3. We fix crank shaft on wooden frame

CONTD.4. We used Solenoid valve for transmit compressed air to the cylinder for 4 stroke rotation Normally in off condition Solenoid valve air inlet hole are B and D and outlet hole are E and C. due to this cylinder squeeze

CONTD5.In ON condition Solenoid valve air inlet hole are B and E and outlet hole are D and A. due to this cylinder expended

This expansion and squeezing help crank rotation

CONTD.6.Solenoid controlling rotation of crank shaft.

CONTD.8. Now we connect 4 solenoid coil with pneumatic cylinder for provide 4 stroke (every coil provide 90 degree rotation when current pass through them).

CONTD.7. We weld two crankshafts and connect pneumatic cylinder with them and fix them on body frame with the help of bearing. We weld one sprocket on the right side of crank shaft to transfer its rotation to gear box

CONTD.9.We connect 1:4 gear box with crankshaft for convert crank speed in to wheel torque motion, due to this our project is easily move on surface.

CONTD.10.The most important part is power transmission system. As we are using 4 solenoid coil and these coil are act as 4 stock transmission, we are using a simple technique to transmit the same power. We take one circular wooden piece and divide that circle in to four parts as shown below diagram, these for piece are metallic cutouts

CONTD.11.Now we take one special dc gear motor and fix it with circular disk and this motor transmit ac supply to coil.

CONTD. Working: our project is working on 220v ac current, we divide this current in to two part. Part-1 is the Solenoid coil, one wire of the each 4-valves (positive) is attach with disk and positive current is transmit by motor with its connecting shaft and negative terminal of valves is connected to negative of supply.

Part-2 is Dc motor regulating supply, second 220v ac supply is going to step down transformer through fan regulator for regulate supply. This transformer converts 220v ac to 12 ac supply. Now we fix one bridge rectifier to convert ac to dc 12v supply for motor. When we operate fan regulator, motor rotate slow and fast to transmit ac current to solenoid coil.

CONTD.12. Final look.

DIAGRAMATIC REPRESENTPictorial view representing source for storage of pressurized air which is then let to the piston through solenoid valve.

UNFAVOURINGWhen air expands, as it would in the engine, it cools dramatically and must be heated to ambient temperature using a heat exchanger .The heating is necessary in order to obtain a significant fraction of the theoretical energy output.Tanks get very hot when filled rapidly. Some tanks are sometimes immersed in water to cool them down when they are being filled. That would not be possible with tanks in a car and thus it would either take a long time to fill the tanks, or they would have to take less than a full charge, since heat drives up the pressure

CONCLUSION The model designed by us is a small scale working model of the compressed air engine. When scaled to higher level it can be used for driving automobiles independently or combined (hybrid) with other engines like I.C. engines. Main advantages of Compressed Air Engine (C.A.E.) are: 1. Zero emission. 2. Use of renewable fuel. 3. Zero fuel cost (the cost is involved only in the compression of air).