Exhaust gas idle relief system for an outboard motor
US9376195B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2014 |
| Grant date | Jun 28, 2016 |
| Priority date | — |
| Expiry date | Dec 14, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2590/021
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An outboard motor comprises an engine having an exhaust gas discharge opening, a midsection housing coupled below and supporting the engine, and an exhaust pipe having an exhaust inlet in fluid communication with the exhaust gas discharge opening. The exhaust pipe extends downwardly to a primary exhaust outlet. An idle relief port in the exhaust pipe is located in a fluid path between the exhaust inlet and the primary exhaust outlet. A sound-attenuating plenum chamber has an interior that is in fluid communication with an interior of the exhaust pipe by way of the idle relief port. The plenum chamber is a separate component that is exterior to the midsection housing, and exhaust gas flows from the interior of the exhaust pipe to the interior of the plenum chamber without first flowing through the midsection housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.