Motorcycle
US6425451B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2001 |
| Grant date | Jul 30, 2002 |
| Priority date | — |
| Expiry date | Feb 23, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An engine of a motorcycle includes a cylinder block and a cylinder head inclined forward on an upper front portion of a crankcase of the engine in an engine installed state. The crankcase comprises a plurality of vertical case sections comprising an upper case section, a middle case section and a lower case section, and the crankshaft is pivotally supported at a mating portion between the upper case section and the middle case section and a transmission shaft is pivotally supported at a mating portion between the middle case section and the lower case section. The upper case section is integrally formed with a lower portion of the cylinder block, and a breather cover manufactured independently is provided in a forward inclined manner so as to cover an upper surface of the middle case section at the rear portion of the uppercase section so as to define a breather chamber inside the breather cover and a breather hose extends substantially perpendicularly upward from a rear upper portion of the breather cover and is connected to the air cleaner at a bottom portion thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.