Is it possible to make a car run with compressed air by using a pneumatic drill instead of the engine?

Question

to replace engine with a pneumatic drill which runs on compressed air.and the air stored in a cylinder at high pressure

Answer 1

Many large diesel engines have pneumatic starters. They create a great deal of torque for a very short amount of time and use a lot of compressed air doing it - so much so that once the diesel engine is fired up, the driver often has to wait for the air pressure to build back up before he can drive (the brakes are also pneumatic).
Air compressors are typically very inefficient and pneumatic motors add even more inefficiency to the whole package. A great deal of pressure would be needed to produce the torque required to power a vehicle and this pressure would have to be available in large quantities (CFM per minute). This would require a large, multi-stage compressor - probably larger than the typical engine it would replace - and that doesn't even include another engine necessary to power the compressor!
That being said - your premise is correct, it is indeed possible to power a car with compressed air - just not practical.

Answer 2

You could do it, but it would be brutally inefficient. A chemical reaction, or an electrical battery has much higher energy density than compressed air.

Also, the compressed air is much more dangerous as it has a much higner kinetic energy in the event of an accident.

Air drills typically operate at a certain number of cubic feet per minute at a certain speed. If you take the volume of air in the cylinder, you can actually calculate how much air you would use. You would likely find that a typical tank of air would probably run the vehicle for no more than a few minutes as drills use quite a bit of air. If you would like to see how much, take a look in an automotive shop and note how often the compressor runs.

Also, these drills don't have a great deal of torque, so the vehicle would not be able to operate at very fast speeds.

It's a nice thought, but really not efficient at all. Sorry.

Answer 3

Sure, it's possible, but the car won't run very fast or very far on a cylinder of high pressure air. How are you going to maintain air pressure or refill the tank? Air compressors generate a great deal of wast heat, which goes directly to increasing global warming, and is not dependent of CO2 generation, although that, to occurs in the power generating station while you are running your compressor.

Answer 4

It would be better to make a car run using hydraulic power, with an air over oil type of accumulator to pressurize the oil.

The accumulator is then a big spring that is "wound" by pressurizing it. You could have a closed system which is charged by towing the car backwards (pumping oil into the accumulator, pressurizing the air, and charging the accumulator), then you drive by just letting the car go.

You could use a needle valve or other regulator to be both your brakes and your accelerator in this set-up.

Answer 5

a reliable invention could be to apply an air compressor as a brake. That capability ought to then be used to assist interior the subsequent uphill in basic terms be working compressor backwards. that's with reference to the decrease of compressed air's usefulness. be happy to apply this invention as I even have maximum of others that i'm no longer able to be arising this. The Compressed Air (CA) has different interesting makes use of besides.