bottom dead centre การใช้

This also serves to cushion the piston as it approaches bottom dead centre ( BDC ), thereby removing some load from the bearings.
In a piston engine, this is the volume that is swept as the pistons are moved from top dead centre to bottom dead centre.
Starting at 1, the piston is at bottom dead centre and both valves are closed at the start of the compression stroke; the cylinder contains air at atmospheric pressure.
When the crank is driven by the connecting rod, a problem arises when the crank is at top dead centre ( 0?) or bottom dead centre ( 180?).
FCW cranks are used on engines to save space as the piston has to clear the counter weight at bottom dead centre, SCW although only 25-33 % larger to obtain the required couple would make the engine taller and the crankcase wider.