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What is another name for the 4-stroke cycle?
Otto cycle.
How many strokes complete one cycle?
Four.
How many crankshaft revolutions per cycle?
Two (720°).
What is the Name the of four strokes?
Intake, Compression, Power, Exhaust.
What happens during intake stroke?
Air-fuel enters cylinder.
What happens when intake valve closes?
Compression starts.
Why compress the mixture?
Better combustion.
What is TDC?
Top Dead Center.
What is BDC?
Bottom Dead Center.
What starts the power stroke?
Ignition
Max force during power stroke?
30,000 psi
What happens in exhaust stroke?
Burned gases exit.
What causes low pressure in exhaust?
Fast gas flow.
Why is it good for aircraft?
High performance
What pushes the piston down?
Expanding gases.
What does the exhaust port do?
Releases gases.
