Hydraulically-assisted engine valve actuator
US6263842A · kind A · utility
33Cited by
32References
57Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2000 |
| Grant date | Jul 24, 2001 |
| Priority date | — |
| Expiry date | Mar 2, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2800/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hydraulically-assisted engine valve actuator for assisting in the actuation of an engine valve, includes a servo piston being operably coupled to the engine valve. A translatable pilot valve is in fluid communication with the servo piston and the main piston and is operably coupled to and controlled by a pilot valve positioning system. The pilot valve positioning system controls a translational stroke of the pilot valve to meter hydraulic fluid under pressure to and from the servo piston. A stroke magnifier magnifies a stroke of the pilot valve positioning system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.