About AIR MOTOR...

I've seen articles that they're building air cars in India. I think the motors use French technology. Presumably there are patents involved, and you should be able to find them. If you can read French. Or Indian.

Use <Google.com> and <Dogpile.com> search engines to search for: "Vane Type Air Motors," "Reciprocating Air Engines," and similar terms.

Plan for automatic tank refilling of Air Tank on Trolley. Controls to start, stop, off-load items and pick up new items.

Look for more on this thread: "Nitrogen powered vehicles Re: air motors."

If you are an engineer, you could of course calculate the output of an air engine.

If you are still being trained to become an engineer you could go from the principle that an air engine uses a volumetric machine in which the detent (with pressure decrease) is the stroke that allows work to be transmitted to a crankshaft. Compressed air engines are two stroke engines, as there is no need to compress fresh air/fuel mixture as in a combustion engine. Rotary air engines exist as well, Quasiturbine for example.

The compressed air engine is an engine that uses a tank of pressurized air as the source of energy. The tank is usually filled with a compressor when the car is not running. The principle of the engine is to let the air expand while giving pressure on a piston, just as in a combustion engine happens. The engine has had interest for decades in places where conditions are particular such as :

• Where combustion and heat can be dangerous (areas with highly inflamable matters)
• Where exhaust gases are difficult to evacuate and pollution is not desired (mines, inside airplanes)
• Where electric motors can also be difficult to implement (deep see operations)

Thus there have been quite a lot of these engines on mining equipment where the engines run deep underground.

The principle can of course also be used outside under normal conditions. When electricity is used for charging the tank the concept can be interesting because it is relatively cheap to charge. It can also be done at night when electricity is cheap.

Remind that the compressed air is an alternative to the EV's battery as an energy storage device. The exhaust gases are clean as well, just as on an EV.

A compressed air tank can be considered a "cheap" or low technology alternative that truely has its merits. I am not surprised to see TATA entering the market with compressed air vehicles in a market like India. Compressed air also is quick in recharging when compared to charging batteries and allows this with low cost material. (Fast recharge of batteries is much more expensive in electronics - cost/MW is high) The advantage with compressed air recharging is that there can be an important buffer of energy storage just before the recharging station. This would be very expensive with electricity.

A french company called Moteur Développement International (MDI), led by engineer Guy Nègre has developped a compressed air engine and the vehicle that uses it.

His compressed air engine and vehicle is mainly intended for applications where pollution is a problem. Municipalities of air polluted urban areas like Mexico City have shown big interest in this concept.

Another company that is working on compressed air as an energy source for an engine is Energine from Corea. Energine uses it in an electric-pneumatic hybrid powertrain configuration.

In the 2001 Busan Motorshow Energine showed a comparison between a compressed air engine and a combustion engine. You can see this on the following photograph:

Efficiency of compressed air engines has always been quite low. That is why there are so few applications in places where combustion engines and electric motors can be used. For some very specific conditions as mentioned before it can however be a perfect alternative.

Here follow a few links of interest to compressed air engines :

La voiture à air (in french)

Books on Air Powered Engines

EngineAir - The Di Pietro rotary compressed air engine

Electro-Air Bike

Air Car Access

Lee Rogers Air Powered Engine

Lee Rogers Air Powered Engine

There are also some other people with with less resources that try to make something out of compressed air propulsion. Here is one of those people : Armando Regusci from Uruguay.

Of course a Wankel engine could run on compressed air as well.

With camshaft timing it is easy to obtain high torque output with high air consumption but also small torque output with low air consumption just like in a combustion engine with VVT simulating the Atkinson cycle.

Best regards

Randolph TOOM
www.heat2power.net
www.randolph-automotive.com

Your can find information about air motors at:-

www.gastltd.com

Look up product information and you will find an Air Motors Handbook that should be helpful.

Hi,

Any pneumatic cylinder supplier should point you in the right direction. We use Pneumatic motor for de-reelers in our manufacturing site. They are supplied by FESTO (have a google) and they will gladly supply you with specs. Note: Pneumatic motors are extremely inefficient.

http://www.psiautomation.com/ has air motors, so does http://www.rotair.co.uk/ and http://www.tonson-motor.com/ http://www.atlascopco-airmotors.com/ http://www.irtools.com/products/airmotors/

Don't sound very practical to me. Air motors use a lot of air. Storage capacity for even a short run would be great. Most of the work being done would be moving the storage tank. Docking the tank for refills would hinder production. If you must use air to power the motor. Get rid of the tank. Place the trolley on a closed loop rail. Use a swivel joint to allow an air line to be pulled along with the trolley. Use a flex line to make up any variations to a true circle the rail may have.

No stopping to refill weight reduction on trolley so smaller motor can be used.

Good Luck

try the US patent office. They have detailed patent descriptions with illustrations included and you can print them for free

haiii

i have a working model of ur miniproject and pdf about air motor