Abstract: A muffler, connected to an engine through an exhaust pipe, includes a shell serving as a muffler body, an inlet pipe configured to introduce exhaust gas from the engine into the shell, an outlet pipe configured to discharge the exhaust gas out of the shell, and a cap configured to be attached to a narrowed portion of the inlet pipe and control the direction in which the exhaust gas flows out. The cap is provided with an opening through which the exhaust gas passes and which regulates the direction in which the exhaust gas flows out.

Abstract: A muffler, connected to an engine through an exhaust pipe, includes a shell serving as a muffler body, an inlet pipe configured to introduce exhaust gas from the engine into the shell, an outlet pipe configured to discharge the exhaust gas out of the shell, and a cap configured to be attached to a narrowed portion of the inlet pipe and control the direction in which the exhaust gas flows out. The cap is provided with an opening through which the exhaust gas passes and which regulates the direction in which the exhaust gas flows out.

Abstract: In a muffler comprising a shell formed by joining a pair of shell halves each including a bottom wall and a side wall and defining an opening opposite to the bottom wall, the shell halves being joined to each other at the openings thereof, the muffler further comprising an inlet pipe for introducing exhaust gas into the shell and an outlet pipe for expelling exhaust gas from inside the shell, a depth of one of the shell halves is greater than a depth of the other shell half, and the inlet pipe and the outlet pipe are connected to the side wall of the one shell half so that the overall plane stiffness of the shell is well balanced and maximized. Therefore, without adding any reinforcement or increasing the wall thickness of the shell, the acoustic emission from the muffler can be minimized.

Abstract: In a muffler comprising a shell formed by joining a pair of shell halves each including a bottom wall and a side wall and defining an opening opposite to the bottom wall, the shell halves being joined to each other at the openings thereof, the muffler further comprising an inlet pipe for introducing exhaust gas into the shell and an outlet pipe for expelling exhaust gas from inside the shell, a depth of one of the shell halves is greater than a depth of the other shell half, and the inlet pipe and the outlet pipe are connected to the side wall of the one shell half so that the overall plane stiffness of the shell is well balanced and maximized. Therefore, without adding any reinforcement or increasing the wall thickness of the shell, the acoustic emission from the muffler can be minimized.