Internal Combustion Engine
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Transcript of Internal Combustion Engine
INTERNAL COMBUSTION
ENGINE
Nicholas DiPreta
Alex Leondis
Basic Premise
Conversion of PE from propellant to a desired motion
Propellant and engine create motion
Where it Came From
Internal combustion engine is derived from the military cannons of old.
Internal Combustion
~ Ignited small amount of fuel in compressed space creates expanding gas-> Otto Cycle
Compression of gas and air ignites and explodes!
+
=
Otto Cycle
Nikolaus Otto, 1867 Four Step Process Intake, Compression, Combustion, Exhaust
Step 1~ Intake Stroke
Intake valve opens, allowing propellant air mixture into cylinder- like putting hairspray in our gun.
Piston begins to move downwards
Step 2~Compression Stroke Piston moves back up to increase pressure of gas air
mixture. Like pushing the potato further into the chamber via ramrod.
Step 3~Ignition/Combustion
Spark plug ignites fuel, driving piston and down
Like igniting the barbeque igniter
Step 4~ Exhaust Stroke
Exhaust valve opens, allowing exhaust out Similarly, exhaust is emitted from the potato gun
The Cycle
The Internal Combustion Engine undergoes a repetitive cycle that differentiates it from a simple explosion powered gun
http://auto.howstuffworks.com/engine1.htm
Intake
CompressionIgnition/Combustion
Exhaust
Engine Arrangements
Inline, V, or Flat
Physics Applications Impulse
Work/KE relation
Fdcos(ᶱ)= ∆KE is transferred into potential and back throughout trajectory
Trying to optimize results by adhering to formulae
Alex’s stuff