TATA Motors to introduce a car that runs on air

 The Air Car, called the MiniCAT could cost around Rs. 3,50,000 ($ 8177) in Indiaand would have a range of around 300 km between refuels.The cost of a refill would be about Rs. 85 ($ 2).

Here's some nifty bullet points for you.

• The Air Car runs a specially developed piston engine that uses a new thermo dynamic cycle offering exceptional energy efficiency.
• Compressed air is stored in carbon fibre tanks, at 300 bar (4,351 psi).
• The CAT engine operates on four cycles: intake and compression, combustion, expansion, and exhaust.
• Outside air is drawn into the compression chamber and compressed to 20 bar (290 psi). At the highest point of pressure (at ‘top dead centre’), this air reaches 400°C (centigrade), and, at that point, air from the storage tank is injected into the combustion chamber.
• Since the injected air is much colder than the compressed air in the chamber, the injected air is heated instantaneously, causing a sudden expansion, which pushes the piston down (in an expansion stroke)
• The air tanks fitted to the underside of the vehicle can hold 300 litres of compressed air, capable of driving the MiniCAT for up to 200km.
• Using a household electrical source, it takes about 4 hours for the vehicle to refill its own compressed air tanks (a rapid three minute recharge is possible using an external high-pressure air pump.
• The MiniCAT runs an electronically controlled continuously variable transmission (CVT)