초록 ▼

An exhaust system includes an exhaust pipe attached to the engine. Attached to the exhaust pipe is a muffler which has an exhaust gas inlet, a plurality of expansion chambers through which exhaust gas flows, and at least one wall between adjacent expansion chambers. There is an opening or orifice in

An exhaust system includes an exhaust pipe attached to the engine. Attached to the exhaust pipe is a muffler which has an exhaust gas inlet, a plurality of expansion chambers through which exhaust gas flows, and at least one wall between adjacent expansion chambers. There is an opening or orifice in the wall between adjacent expansion chambers. A flap which covers the orifice or the opening in the wall between adjacent expansion chambers. The flap opens in response to a pressurized surge of exhaust gas entering into the expansion chamber. The muffler also has an exhaust gas outlet for allowing exhaust gas to pass from the second chamber of the muffler. The exhaust system typically has a plurality of chambers attached to one another such that the exhaust gas travels along a tortuous path between the exhaust gas inlet and the exhaust gas outlet. The flap is pivotally attached to the wall between adjacent expansion chambers. The flap is also positioned so that it closes due to gravitational forces. The wall between adjacent expansion chambers is positioned on a plane that cuts the plane in which the exhaust gas inlet is positioned.

대표청구항 ▼

[ What is claimed is:] [1.] A muffler apparatus comprising:an exhaust gas inlet;a first expansion chamber;a second expansion chamber adjacent the first expansion chamber;a wall between the first and second expansion chamber, said wall having an orifice therein;a flap which covers the orifice in the

[ What is claimed is:] [1.] A muffler apparatus comprising:an exhaust gas inlet;a first expansion chamber;a second expansion chamber adjacent the first expansion chamber;a wall between the first and second expansion chamber, said wall having an orifice therein;a flap which covers the orifice in the wall, said flap opening in response to a surge of pressurized exhaust gas in the first expansion chamber; andan exhaust gas outlet for allowing exhaust gas to pass from the second chamber, wherein the exhaust gas inlet is in a first plane and the orifice between the first expansion chamber and the second expansion chamber is in a second plane, said first plane transverse to the second plane.