danielbooneamerica
New User
I have a couple questions that I am hoping can be answered by experts (and I mean that) that support these boards.
When my U302 comes up on compression when running, what is normal average cylinder pressure?
If it could be measured, after fuel ignites and pressure in cylinder reaches max, what is that average?
Now lastly, when a piston comes to bottom after power stroke it would have to have some small amount of pressure still in cylinder.
Last time it was at bottom it was filled with air and fuel at I am guessing normal atmospheric pressure.
All that is still there except burned and expanded so pressure would have to be higher than before burn.
Before exhaust valve opens what is happening at that bottom stroke?
In my mind, I would think one that used all expanded energy before exhaust valve opens would be most fuel efficient.
Lastly how does engineers designing engines view all this? It seems a trade on one area requires a change in another or it doesn't seem I know it would. Laws of physics works across all disciplines of science.
Thanks,
Daniel
Why do I want to know all this? No reason, I just do. I am a computer science/electrical engineer by trade but I have been fascinated with these questions in my head since growing up on a farm where my Dad had a 1966 Super Jet.
When my U302 comes up on compression when running, what is normal average cylinder pressure?
If it could be measured, after fuel ignites and pressure in cylinder reaches max, what is that average?
Now lastly, when a piston comes to bottom after power stroke it would have to have some small amount of pressure still in cylinder.
Last time it was at bottom it was filled with air and fuel at I am guessing normal atmospheric pressure.
All that is still there except burned and expanded so pressure would have to be higher than before burn.
Before exhaust valve opens what is happening at that bottom stroke?
In my mind, I would think one that used all expanded energy before exhaust valve opens would be most fuel efficient.
Lastly how does engineers designing engines view all this? It seems a trade on one area requires a change in another or it doesn't seem I know it would. Laws of physics works across all disciplines of science.
Thanks,
Daniel
Why do I want to know all this? No reason, I just do. I am a computer science/electrical engineer by trade but I have been fascinated with these questions in my head since growing up on a farm where my Dad had a 1966 Super Jet.