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Crankshafts are rotating shafts that are used to convert the reciprocating motion of pistons into rotational motion. Crankshafts are used in internal combustion engines and consist of a series of cranks to which the connecting rods are attached.

  • The output end of the crankshaft has the flywheel or drive plate attached to it. The front end has a gear or sprocket that drives the camshaft. vibration damper and the drive belt pulley 
  • A crankshaft sensor signals the passing of the notches to the computer in the EEC (electronic engine control) system, The computer then uses this information to calculate engine speed or crankshaft rpm and piston position
  • As the piston moves up and down, the rod journal moves in a circle and the crankshaft rotates. The connecting road swings to one side so its lower end follows the rod journal. After the piston reaches the bottom dead center and starts up the rod tilts to the other side. As the piston moves up and down the connecting rod tilts back and forth, This will allow the big eng of the connecting rod to follow the rod journal as it swings in a circle around the crankshaft. The action changes the reciprocating piston motion into the rotary motion of the crankshaft.