| 摘要 |
PURPOSE: A door damper for a vehicle is provided to prevent damage of a door and a vehicle body due to sudden opening and closing by changing a damping coefficient according to speed of the door in opening and closing. CONSTITUTION: A door damper for a vehicle comprises a sensing unit(30), a control unit, and an operating unit(50). The sensing unit senses temporary acceleration of a door. The control unit has a microcomputer to compare and control an output value inputted from the sensing unit. The operating unit decelerates moving speed of the door by the control unit. The sensing unit comprises an electromagnet installed to one side of a body bracket(11) and a magnet core installed to a door bracket(12) to generate change of magnetic force of the electromagnet. The operating unit comprises a damper case(51), a hinged pin(53) and fluid(52) for damping. The damper case is fixed to one side of the body bracket in negative pole. The hinged pin penetrates the damper case, and the hinged pin is moved with the door bracket integrally. Fluid for damping fills the damper case and coefficient of viscous is changed by electric current. Therein, coefficient of viscous for fluid is increased when door is opened and closed rapidly.
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