Muffler for an exhaust system of an internal combustion engine
US11143070B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 30, 2019 |
| Grant date | Oct 12, 2021 |
| Priority date | — |
| Expiry date | Jun 8, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2490/18
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A muffler for an exhaust system of an internal combustion engine includes a housing, a through pipe that conducts exhaust gas during operation of the muffler and is guided through the housing, and a branch pipe fluidically branching off from the through pipe within the housing. The branch pipe has an upstream end at the through pipe and ends freely and open at an end face with a downstream end within the housing. The branch pipe has a length from the upstream to the downstream end or up to a lateral recess which has a cross-sectional area which is greater than half a pipe cross-section of the branch pipe. The branch pipe has downstream perforations in a section from ⅜ of the length as measured from the upstream end A total area of the downstream perforations is smaller than half the pipe cross-section of the branch pipe, and no perforations or upstream perforations have a total area of at most 10% of the pipe cross-section of the branch pipe being present in a section before ⅜ of the length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.