Dual-pressure hydraulic valve-actuation system
US6067946A · kind A · utility
70Cited by
21References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1996 |
| Grant date | May 30, 2000 |
| Priority date | — |
| Expiry date | Dec 16, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0318
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A system and a method for hydraulic actuation of poppet valves. The poppet valve is opened by application of hydraulic pressure to a piston, and is closed by action of a mechanical spring. Hydraulic pressure comes from either a high pressure source of a low pressure source, the low pressure source being higher than ambient pressure. Application of hydraulic pressure is made by a pressure control device based upon signals received from an electronic controller. Hydraulic pressure is applied in a way that minimizes the power required to actuate the valve by making use of valve inertia.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.