Timing device for check valve control

PURPOSE: A timing device for controlling a check valve is provided to prevent a check valve from being closed by carbon generated by the internal combustion of a pre-camber. CONSTITUTION: A timing device for controlling a check valve comprises a support base(100), a timing device body(200), a pressure unit(210), a roller(220), a roll guide unit(300), and a yoke portion(400). The support base is fixed to a body portion of the pre-chamber by an anchoring bolt. The timing device body is connected the support base by a shaft. The pressure unit is coupled with one end of the device body portion. The roller is coupled with the other end of the device body portion. The roll guide unit contacts the roller. The roll guide unit comprises a cam-shaped protrusion(310). The cam-shaped protrusion can push the roller. The yoke portion moves the cam portion up and down.