Method and apparatus for controlling an electromagnetically operated engine valve to initial condition before engine startup
US6374783B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 10, 2000 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | Aug 10, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L9/20
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An apparatus for controlling an electromagnetically operated engine valve to an initial condition before an engine startup is disclosed. The apparatus is adapted for determining a viscosity of an engine lubricating oil and executing either one of a resonant initialization, in which the engine valve is oscillated to be moved from a mid-open position to a closed or full open position and held therein by alternately energizing two electromagnets of an electromagnetic actuator, and a one-shot initialization, in which the engine valve is moved from the mid-open position to the closed or full open position and held therein with one stroke by onetime energizing one of the electromagnets, depending on the determined viscosity of an engine lubricating oil. A method for controlling the engine valve to the initial condition is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.