Fixation structure for valve system rotation shaft of internal combustion engine
US7966982B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2009 |
| Grant date | Jun 28, 2011 |
| Priority date | — |
| Expiry date | Dec 19, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2820/033
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fixation structure for a valve system rotation shaft of an internal combustion engine to support a camshaft with a cylinder head through the use of a lower cam holder and cam caps, which are formed separately from the cylinder head. The fixation structure eliminates the necessity of taking special vibration/noise control measures for a head cover thus preventing an increase in the cost, size, and weight of the head cover. A head external wall extends toward the head cover rather than toward a head middle surface in such a manner so as to cover the circumference of the lower cam holder fixed to a head middle surface. The connection to the holder fixation section is established with the base end of an external wall of the head cover abutted on the leading end of the head external wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.