Electromagnetic valve actuators
US6619246B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Nov 4, 2002 |
| Grant date | Sep 16, 2003 |
| Priority date | — |
| Expiry date | Nov 4, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A device for actuating a gas exchange valve of an internal combustion engine or gas generator comprises an armature which is operatively connected to the valve stem of a valve member and which is disposed in a chamber between opposed pole faces of a valve closing electromagnet and a valve opening electromagnet. A gas pressure source is connected by a supply line to the chamber. When the electromagnet is energized, it is effective to act on the armature to move the valve member to the closed position. The arrangement is such that reduction of the electromagnetic force exerted on the armature by the electromagnet is effective to enable the gas pressure from the source to move the valve member to the open position. This opening movement of the valve member may be assisted by energizing the opening electromagnet. Movement of the valve member from the open to the closed position may be assisted by a return spring. The valve actuator minimizes the electric power consumption for the electromagnets. In an alternative embodiment, the opening electromagnet is dispensed with and valve movement is achieved by the electromagnet in the closing direction and gas pressure in the opening direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.