JPH023009U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram of a muffler for an internal combustion engine as an embodiment of the present invention, Fig. 2 is a schematic sectional view of an on-off valve of this embodiment, and Fig. 3 is a schematic diagram of an on-off valve as another embodiment. The sectional view and FIG. 4 are schematic diagrams of a muffler for an internal combustion engine according to the second embodiment, and FIGS. 5 to 7 are schematic diagrams of a conventional muffler for an internal combustion engine. 2... Front end wall, 4... Rear end wall, 6... Cylindrical body, 8... First partition wall, 10... Second partition wall, 12... First expansion chamber, 1
4...Second expansion chamber, 18...Inlet pipe, 20
...Outlet pipe, 30, 50...Opening/closing valve.

Claims (1)

[Claims for Utility Model Registration] An interior combustion engine consisting of a cylindrical body whose front and rear ends are closed by end walls, having a plurality of chambers partitioned by partition walls, and communicating with an exhaust pipe of an internal combustion engine. Exhaust air from the let pipe is introduced into a first expansion chamber among the plurality of chambers of the cylindrical body, and a second expansion chamber among the plurality of chambers communicated with the first expansion chamber is communicated with the outside. In a muffler for an internal combustion engine that discharges exhaust gas to the outside from an outlet pipe, the valve opens when the pressure in the first expansion chamber exceeds a predetermined pressure, and the first expansion chamber and the second expansion chamber are separated. A muffler for an internal combustion engine characterized by being provided with a communicating on-off valve.