Exhaust device for motorcycle engine
US7828114B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2008 |
| Grant date | Nov 9, 2010 |
| Priority date | — |
| Expiry date | May 8, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2590/04
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A muffler for efficiently reducing noise. Front side exhaust pipes and rear side exhaust pipes extend from front cylinders and rear cylinders, respectively, of a V-type water-cooled 4-cylinder engine and are operatively connected to a catalyst chamber disposed below a crankcase. The catalyst chamber is connected to an exhaust chamber located to the rear thereof in which exhaust gas is expanded. An outlet pipe laterally projects from a lateral surface of a rear end portion of the exhaust chamber and is connected to a front pipe projecting from the lateral surface of the front portion of a muffler. The front pipe is transversely inserted into the muffler to increase a cross-section ratio, thereby efficiently reducing noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.