Variable duration camshaft
US6832586B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 9, 2003 |
| Grant date | Dec 21, 2004 |
| Priority date | — |
| Expiry date | Oct 9, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2820/035
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A variable timing duration camshaft has an outer shaft (1) and coaxial inner shaft (2) adapted so that the shafts (1, 2) are relatively slidable but not rotatable about each other. The outer shaft (1) has valve control lobes located on its outer surface and a valve control lobe modifying segments (4) is located on the inner shaft (2) and is slidingly fitted into a mating slot (5) in the outer shaft and in the valve control lobe whereby longitudinal axial movement of the inner shaft (2) relative to the outershaft by a control means (13, 14) causes the modifying segment (4) to move longitudinally and circumferentially relative to the valve control lobes thereby varying the duration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.