Compressed Air Engine

hariprasad92
Member • Dec 9, 2011

Compressed Air Engine

hi friends.. am doing prefinal year BE in mechanical stream.. i've planned to construct an compressed air engine which can able to propel a two wheeler.. i strucked with the ideas.. is it possible to increase the torque of engine by using light weight metals like aluminium..?? if so how much bar of compressed air can i use..?? i wil be grateful if ur ideas helps me to go forward with my project..!! please help me..!!

thank you all... i wil be looking forward for ur valuable ideas..

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Ramani Aswath

Member • Dec 11, 2011

There are any number of pneumatic tools and one car (Airpod) rubnning on compressed air. It is rumoured that TATA is going to make the car for India.
A compressed air engine can be reciprocating (rather like a compressor in reverse) or a turbine. If you are looking only at an end of term project, consider modifying an existing small compressor to work in reverse as a motor.

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hariprasad92

Member • Dec 13, 2011

thanks for ur suggestion sir..!! i ll take tat in account.. i've started working by modifying a splendor engine. i ll update my status regarding my project..
thank you..!!

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Kaustubh Katdare

Administrator • Dec 13, 2011

hariprasad92
thanks for ur suggestion sir..!! i ll take tat in account.. i've started working by modifying a splendor engine. i ll update my status regarding my project..
thank you..!!
...and upload photos as well. It would make everything more interesting 😀

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Nitesh_Verma

Member • Dec 15, 2011

hi.. i am nitesh verma final year mechanical student.. i am going to make a air compressed engine in my final year project.. i want to know that where i should start it ? and what's its requirements and process?

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rohith_shankar

Member • Dec 17, 2011

how do you plan to store the compressed air??

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Gurjap

Member • Dec 17, 2011

I would suggest using a two-stroke engine, if you need to run a reciprocating machine on compressed air. Those are optimal for this kind of application.

In a four-stroke engine, you'd have to fiddle with valves and their timing and what-not, whereas a two-stroke engine would have no valves (and hence no valve timing mechanisms) and it'll be more compact and lightweight.

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hariprasad92

Member • Dec 22, 2011

guys... what if i use some electro-mechanical systems as an alternatives for conventional cam system in a four stroke engine.. we've planned to remove the entire system and use solenoid valves as an alternative..??

thanks in advance for ur valuable critics...!!

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Gurjap

Member • Dec 22, 2011

your engine is now essentially gonna be two-stroke; the first is when you open (the formerly) inlet valve and the compressed air fills the cylinder. After BDC, you open the other valve and the "blowdown" will occur (if I may use that term when there is no burned gas 😛). This will cause the used air to rush out the exhaust pipe (if you are using that). This will be start of the second stroke. I have to stress that you open the outlet valve immediately after the piston reached BDC, or it will start needlessly re-compressing the air.

About what you've said about the timing system, you will need to modify that if your engine is four stroke, as is obvious from the above paragraph. If the one you have is mechanical, removing it in favor of a solenoid one is not a bad idea; if you know how to control that one.

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hariprasad92

Member • Dec 23, 2011

Gurjap
your engine is now essentially gonna be two-stroke; the first is when you open (the formerly) inlet valve and the compressed air fills the cylinder. After BDC, you open the other valve and the "blowdown" will occur (if I may use that term when there is no burned gas 😛). This will cause the used air to rush out the exhaust pipe (if you are using that). This will be start of the second stroke. I have to stress that you open the outlet valve immediately after the piston reached BDC, or it will start needlessly re-compressing the air.

About what you've said about the timing system, you will need to modify that if your engine is four stroke, as is obvious from the above paragraph. If the one you have is mechanical, removing it in favor of a solenoid one is not a bad idea; if you know how to control that one.
thanks for ur reply mate..!! now am in great confusion tat wil it be possible to give accurate timing for opening and closing of valves at the exact positions( TDC & BDC ).. but i gonna give it a try..!!

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