Back to results
US 7,503,427 B2Granted
Muffler
AssigneeCalsonic Kansei Corporation
InventorYouhei Toyoshima
Life of this patent
Estimating the term…
Abstract
A muffler is capable of sufficiently reducing flow noise, discharge noise, vehicle noise, and cabin noise, preventing a pressure loss, and improving output power. The muffler has a muffler body, an upstream pipe that opens in the muffler body, and a downstream pipe that opens in the muffler body. An opening is formed in a side wall of the downstream pipe in the muffler body. The opening consists of many small holes arranged in an elongated area extending in an axial direction of the downstream pipe.
Claims12
A muffler comprising:
- a muffler body defining an expansion room;
- an upstream pipe, an end portion thereof is opened in the expansion room;
- a downstream pipe having a first straight pipe portion opened in the expansion room, a second straight pipe portion opened outside of the expansion room, and the first straight pipe portion and the second straight pipe portion being joined together by a curved pipe portion;
- and
- an opening formed in a side face of the second straight pipe portion of the downstream pipe in the expansion room, the opening being formed in an elongated area extending substantially along a main axis of the downstream pipe,
- wherein the end portion of the upstream pipe and an end portion of the first straight pipe portion of the downstream pipe are opened towards the same direction,
- wherein the opening in the downstream pipe is positioned in an axial direction only between the end portion of the upstream pipe and the end portion of the first straight pipe portion of the downstream pipe, and
- wherein the elongated area is directionally stretched in a circumferential direction of the downstream pipe and is evenly distributed in a substantial main axis direction of the downstream pipe.
5 more elements
Dependencies are inferred from the claim text.