| 摘要 |
In an exhaust muffler using a double communicating tube extending between expansion chambers, exhaust gas is prevented from flowing directly between intake and exhaust ports of the inner communicating tube and the outer communicating tube. On one end side of the double communicating tube (40) which faces into a second expansion chamber (32), a distal end opening (42c) of the inner communicating tube (42) functions as an intake port (48) of an inside passage (44). A closing member (45) which closes an axial end of an annular passage (43) is provided at a distal end opening (41) d of the outer communicating tube (41). An exhaust port (47) which opens the annular passage (43) radially outwardly is provided between the closing member (45) of the outer communicating tube (41) and a first partition wall (26). |
