EXHAUST MUFFLER DEVICE FOR COMBUSTION ENGINE

摘要

An exhaust muffler device for an combustion engine includes: a first expansion chamber into which exhaust gas from a combustion engine flows; a second expansion chamber disposed downstream of the first expansion chamber; a resonance chamber that is disposed adjacent to the first expansion chamber and communicates with an exhaust passage; a discharge passage through which the exhaust gas that flows into the resonance chamber is discharged to the outside; and an exhaust valve disposed in a second partition wall between the first expansion chamber and the resonance chamber. The exhaust valve opens when pressure in the first expansion chamber attains a value greater than a predetermined value.

主权项

1. An exhaust muffler device comprising an expansion chamber into which exhaust gas from a combustion engine flows, the exhaust muffler device comprising:
an exhaust passage configured to discharge the exhaust gas through the expansion chamber to an outside of the exhaust muffler device; a muffler chamber disposed adjacent to the expansion chamber; a discharge passage configured to discharge the exhaust gas from the muffler chamber to the outside of the exhaust muffler device; and an exhaust valve disposed in a partition wall between the expansion chamber and the muffler chamber, and configured to open when pressure in the expansion chamber attains a value greater than a predetermined value.