Valve actuating mechanism
US6354255B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2000 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Nov 28, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2820/01
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A valve actuating mechanism is disclosed which comprises a valve (12), a camshaft having a cam (22) of fixed profile associated with the valve (12), a valve lifting rocking cam (24) pivotable about a fixed axis and having a contoured surface that acts to open and close the valve (12) as the rocking cam (24) pivots about said fixed axis, and a cam following rocker (26) comprising a cam follower (46) in contact with the fixed profile cam (22) on the camshaft and coupled to the rocking cam (24) in order to cause the rocking cam (24) to pivot about the fixed pivot axis with rotation of the camshaft. The rocker (26) is pivotable about a second axis that is movable relative to the fixed pivot axis of the rocking cam (24) in such a manner as to allow the valve lift, phase and duration of the valve event to be varied in dependence upon the position of the pivot axis of the rocker (26). In accordance with the invention, the rocking cam (24) and rocker (26) are pivotable about a cranked shaft that is rotatable about the same axis as the rocking cam (24), the rocker (26) being mounted on an offset crank of the cranked shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.