Engine having concentric camshaft with differential valve lift
US8235019B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 11, 2009 |
| Grant date | Aug 7, 2012 |
| Priority date | — |
| Expiry date | Nov 26, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2003/25
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A camshaft assembly may include a first shaft, a second shaft, a first lobe and a second lobe. The second shaft may be coaxial with and rotatable relative to the first shaft. The first lobe may be fixed for rotation with the first shaft and adapted to open a first valve in communication with an engine combustion chamber. The first lobe may define a first valve opening region having a first angular extent. The second lobe may be fixed for rotation with the second shaft and adapted to open a second valve in communication with the engine combustion chamber. The second lobe may define a second valve opening region having a second angular extent greater than the first angular extent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.