Hydraulically-assisted engine valve actuator
US6044815A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 9, 1998 |
| Grant date | Apr 4, 2000 |
| Priority date | — |
| Expiry date | Sep 9, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L9/10
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hydraulically-assisted engine valve actuator and method for assisting in the actuation of an engine valve includes a translatable pilot valve that is operably coupled to and controlled by a pilot valve positioning system. A servo piston is in fluid communication with the pilot valve and is operably coupled to the engine valve. The pilot valve positioning system controls translation of the pilot valve to meter hydraulic fluid under pressure to and from the servo piston. The hydraulic fluid under pressure causes the servo piston to closely follow the translation of the pilot valve to effect a desired profile of translational opening and closing motion of the engine valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.