Muffler for vehicle

A muffler for a vehicle, the muffler comprising:

• a muffler shell;
• a baffle disposed within the muffler shell, and having a first opening and a second opening, which allow an exhaust gas to pass therethrough;
• and
• a variable valve mounted on the baffle,
• wherein:
• the variable valve includes:
• a valve plate rotatably mounted to open and close the first opening of the baffle,
• a valve arm connected to the valve plate, and
• a valve actuator configured to move the valve arm by variations in pressure of the exhaust gas,
• the valve plate is configured to rotate in a plane parallel to a plane of the baffle, and
• the valve plate is rotatably mounted on the baffle through a shaft to maintain a contact with a surface of the baffle, and
• wherein:
• the valve actuator includes an actuator housing having a receiving space which receives the exhaust gas through the second opening,
• the receiving space of the actuator housing directly communicates with the second opening of the baffle,
• edges of the actuator housing are coupled to the baffle by welding all around,
• the valve plate has a lug extending from an outer peripheral edge thereof, and
• the lug is rotatably mounted on the baffle through the shaft,
• the lug has a guide projection protruding in a direction away from the baffle,
• the valve arm has a guide recess by which a movement of the guide projection is guided, and
• as the valve arm moves, the guide projection of the lug is guided along the guide recess of the valve arm so that the valve plate rotates.