Oil system for active fuel management on four valve engines
US7942118B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 19, 2008 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Aug 19, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L13/0005
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An oil system for selectively deactivating valves for specified cylinders of an internal combustion engine includes a cylinder head having a lash adjuster oil passage and a cylinder deactivation oil passage. Plugs are coupled to the cylinder head separating the cylinder deactivation oil passage into separate portions. A clearance between a portion of each plug and the head allows a controlled flow of oil to pass from the lash adjuster oil passage to the cylinder deactivation oil passage to purge air from the cylinder deactivation oil passage. A valve is operable to selectively supply pressurized oil to the cylinder deactivation oil passage to deactivate the specified cylinders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.