Efficient internal combustion engine valve actuator
US6722349B2 · kind B2 · utility
18Cited by
49References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 4, 2002 |
| Grant date | Apr 20, 2004 |
| Priority date | — |
| Expiry date | May 10, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An engine with an efficient valve actuator is disclosed. The engine employs a first force to hold a valve of the engine open during a normal valve event and a second force to hold the exhaust valve open during an exhaust gas recirculation event. The valve actuator may be operated using pressurized fluid adapted to extend an actuator plunger through a cylinder. The first force may be derived by a mechanically driven actuator, while the second force may be derived from a high pressure rail of the engine. A control valve may be employed to direct either low pressure or high pressure oil to the valve actuator cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.