| 摘要 |
PURPOSE: A variable torque type crank shaft of an engine is provided to improve output of the engine by increasing torque without influencing rotary frequency of the engine in explosive stroke of a combustion chamber. CONSTITUTION: A variable torque type crank shaft of an engine includes a center gear(65) installed at the center position of rotation of the crank shaft between two crank arms, an eccentric planetary gear(66) installed at both sides of a connecting rod(55) to be eccentric around a crank pin(64), and rotating and revolving with being engaged with the center gear, wherein the center gear and the eccentric planetary gear are coupled to position the crank pin most far from the rotary centroid of the crank shaft in explosive stroke of a piston(50).
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