Variable pressure weatherstrip assembly

A variable pressure weatherstrip assembly comprising:

• a weatherstrip comprising a sealing portion having a closed cross-section therein and configured to seal a portion between a vehicle body and an opening/closing part of a vehicle, and a fixing portion integrated with the sealing portion and fixed to a panel of the vehicle;
• an air supply device configured to supply pressurized air to the sealing portion;
• an air line configured to allow the air supply device and the sealing portion to communicate with each other;
• one or more control valves installed in the air line, disposed between the sealing portion and the air supply device, configured to control the air to be supplied to the sealing portion from the air supply device;
• a control unit configured to control the air supply device and the one or more control valves according to a speed of the vehicle or whether the opening/closing part is opened or closed so that a pressure in the sealing portion is within a predetermined pressure range from a preset reference pressure,
• wherein the one or more control valves comprise:
• a first control valve configured to control introduction of air from the outside;
• a second control valve installed between the first control valve and the air supply device;
• a third control valve installed to be connected to the air line and configured to control and allow the air line and the atmosphere to communicate with each other;
• and
• a fourth control valve installed between the air supply device and the air line.