Patent ID: 7364214

Claim:
A control apparatus for opening and closing a tailgate, comprising: a sensor for detecting an open angle of said tailgate from a vehicle body; an Electronic Control Unit that receives a detected open angle from said sensor and outputs a pressure regulating control signal; and a gas lifter that regulates pressure in a cylinder according to the pressure regulating control signal of said Electronic Control Unit, wherein said gas lifter comprises: a hinge part pivotably installed at a connecting portion of a trunk body; a piston rod pivotably installed at a connecting portion of said tailgate and including a piston that moves back and forth while said tailgate is opened and closed; a cylinder formed with first and second chambers packed with gas that is compressed by said piston; a motor disposed opposite to said piston rod in said cylinder and operating in response to the pressure regulating control signal of said Electronic Control Unit; and a pressure regulating plate connected to said motor and changed in position according to the operation of said motor to vary pressure of said first and second chambers in said cylinder.