Engine silencer

JPWO2025069327A1Pending Publication Date: 2025-04-03
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Filing Date
2023-09-28
Publication Date
2025-04-03
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Claims

1. A chamber connected to the engine, The chamber comprises a tube arranged in the chamber, The tube has multiple holes, the opening at its end is closed, and a space is formed that communicates with the chamber through the multiple holes. An engine silencer wherein the projected area of ​​at least one of the openings with respect to a plane perpendicular to the axial direction of the pipe is greater than the cross-sectional area of ​​the pipe perpendicular to the axial direction at the location where the hole is provided.

2. The engine silencing device according to claim 1, wherein the plurality of holes are provided closer to the end of the pipe than to the central portion in the axial direction.

3. The engine silencing device according to claim 1 or 2, wherein a first group of the plurality of holes is provided at a first position of the pipe, and a second group of the plurality of holes is provided at a second position located axially away from the first position of the pipe.

4. The aforementioned chamber is divided into multiple sections, The pipe extends across the first section and the second section adjacent to the first section. The engine silencing device according to any one of claims 1 to 3, wherein the pipe is provided with a first group of multiple holes communicating with the first section and a second group of multiple holes communicating with the second section.

5. The opening of the aforementioned pipe is closed by a closing member. The engine silencing device according to any one of claims 1 to 4, wherein at least one of the plurality of occluding members is provided with the hole through which the space communicates with the chamber.

6. (delete)

7. The pipe comprises a first side member and a second side member disposed inside or outside the first side member. The engine silencing device according to any one of claims 1 to 5, wherein at least two of the openings of one side member and the other side member, and the openings of one side member and the other side member, are closed so that the first side member and the second side member communicate with the chamber through a plurality of holes.