Exhaust pipe structure for vehicle
US6182447A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1998 |
| Grant date | Feb 6, 2001 |
| Priority date | — |
| Expiry date | Dec 28, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K13/04
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A front exhaust pipe is connected to a front engine block, and a rear exhaust pipe is connected to a rear engine block. The front exhaust pipe extends from the front engine block downward, and curves and extends rearward. The rear exhaust pipe includes an upstream portion extending downward from a rear portion of the engine and a downstream portion extending forward from a lower end of the upstream portion and curving rearward. Rear ends of the front and rear exhaust pipes are joined together and connected to a main exhaust pipe. The rear and front exhaust pipe have substantially the same length. Therefore, vibration due to a difference between natural frequencies of front and rear exhaust pipes is reduced, and sound vibration performance is enhanced. Further, a declination of output due to disorder of exhaust pulsation in the confluence portion of the front and rear exhaust pipes is avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.