dead center position

dead center position

dead center positionclick for a larger image
Dead center positions with piston at top dead center on the left and at bottom dead center on the right.
The position of the piston in a reciprocating engine in which the wrist pin, the crank pin, and the center of the crankshaft are all in one line. The two dead center positions are top dead center (TDC) and bottom dead center (BDC). At either of the two positions, the piston stops moving and reverses the direction of its movement.
References in periodicals archive ?
It delays the firing of the magneto to more of a top dead center position and when the catch lets go, the built-up energy in the spring speeds up the rotation of the magneto.
Shortly after the piston in the power cylinder reaches its top dead center position, the gas is quickly transferred to the power cylinder and fired (or combusted) to produce the power stroke.
Shortly after the piston in the power cylinder reaches its top dead center position, the gas is transferred to the power cylinder and fired to produce the power stroke.