Biodiesel Engine Explanation- Post #6

The Piston transfer force from expanding gas in the cylinder via a piston and/or connecting rod.             
The Spark plug ignites compressed fuels by means of an electric spark.
The Valve guides the plug portion by sliding through the valve guide.
The connecting rod connects the piston to the crank.
The Crankshaft powers the machine.
Exhaust Crankshaft take all the extra exhaust.
Intake Crankshaft takes in the intake.