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...e''' ('''TDC''') while the latter is known as '''bottom dead centre''' ('''BDC'''). Finding the volume of the cylinder using TDC and BDC and multiplying it by the number of cylinders will give the [[engine displa

where <math>p_0</math> is the cylinder pressure at bottom dead center (BDC) which is usually at 1 atm, <math>C_r</math> is the compression ratio, and ...s sealed at the bottom of the stroke ([[Dead centre|bottom dead centre]] - BDC), and that the volume compressed is the actual volume.

...ngine when one piston of a pair is at Top Dead Centre the other will be at BDC. In a boxer engine a pair of pistons will be on crank pins 180° apart so t

...McCollum type), the high wear points linked to poor lubrication in the TDC/BDC of piston course are suppressed, therefore rings and cylinders lasted much ...ication problems, as piston ring ridge wear at TDC and bottom dead center (BDC) does not occur. The Hercules overhaul time was rated at 3,000 hr at wide o

...en a valve is opened or closed with respect to the piston position (TDC or BDC). ''[[Valve lift|Lift]]'' refers to how much the valve is opened. '''Durati