Valve deactivation with an electro-hydraulic actuator
US6666178B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2002 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | Aug 8, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2305/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An electro-hydraulic actuator assembly having a plurality of hydraulic pressure operated pistons controlled by a single solenoid operated shut-off and vent valve. Eaton hydraulic piston has an exteriorly extending arm attached thereto for contacting a release latch on the engine valve gear for disablement or deactivation of the valves in selected engine combustion chambers. The actuator assembly is disposed with the shut-off and vent valve vent port vertically above the hydraulic piston bores; and, a bleed orifice is provided for bleed flow from the hydraulic piston bores to the valving chamber in the shut-off and vent valve for permitting bleed flow and air purge. Gravity flow from the vent port may also provide lubrication for the engine cam surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.