- Intake Stroke – The inlet valve is opened and the fuel/air mixture is drawn in as the piston travels down.
- Compression Stroke – The inlet valve is closed and the piston travels back up the cylinder compressing the fuel/air mixture. Just before piston reaches the top of its compression stroke a spark plug emits a spark to combust the fuel/air mixture. The number of degrees before the top its stroke is the ignition advance.
- Combustion Stroke – The piston is now forced down by the pressure wave of the combustion of the fuel air mixture. The engines power is derived from this stroke.
- Exhaust Stroke – The exhaust valve is opened and the piston travels back up expelling the exhaust gases through the exhaust valve. At the top of this stroke the exhaust valve is closed.
- Left Mouse Button – rotation in 3D space
- Right Mouse Button – move objects
- Mouse scroll wheel – zoom
- Click on parts of objects – get more information
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