Exhaust muffler for vehicle
View Patent ↗An exhaust muffler for a vehicle includes a muffler body coupled to an exhaust pipe and a tailpipe coupled to the muffler body. The muffler body has a plurality of expansion chambers, an exit communication pipe that discharges exhaust to the tailpipe from one of the plurality of expansion chambers positioned in a most downstream part of an exhaust flow path, and a spark arrester arranged in the exit communication pipe. An exhaust flow path narrowing portion is provided at an entrance portion of the exit communication pipe.
1. An exhaust muffler for a vehicle comprising:
a muffler body coupled to an exhaust pipe; and
a tailpipe coupled to the muffler body;
wherein the muffler body includes:
a plurality of expansion chambers;
an exit communication pipe that discharges exhaust to the tailpipe from one of the plurality of expansion chambers positioned in a most downstream part of an exhaust flow path;
an exhaust flow path narrowing portion at an upstream end of the exit communication pipe; and
a spark arrester body arranged at a downstream side of the exhaust flow path narrowing portion in the exit communication pipe.
2. The exhaust muffler for a vehicle according to claim 1 , wherein
the spark arrester body comprises a mesh-like member.
3. The exhaust muffler for a vehicle according to claim 1 , wherein
the exhaust flow path narrowing portion is comprises a lid member having a through hole, the lid member being provided at an upstream portion of the exit communication pipe.
4. The exhaust muffler for a vehicle according to claim 3 , wherein
an opening area of the through hole is substantially equal to a cross-sectional area of an exhaust flow path at an upstream end of the exhaust pipe.
5. The exhaust muffler for a vehicle according to claim 3 , wherein
a difference between a cross-sectional area perpendicular to an exhaust flow path of the exit communication pipe and a cross-sectional area perpendicular to an exhaust flow path of the spark arrester is substantially equal to an opening area of the through hole.
6. The exhaust muffler for a vehicle according to claim 1 , wherein
an upstream end of the spark arrester body is spaced apart from the exhaust flow path narrowing portion.