Apparatus and method for controlling position of electromagnetically operated engine valve of internal combustion engine
US6343577B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 19, 2001 |
| Grant date | Feb 5, 2002 |
| Priority date | — |
| Expiry date | Jan 19, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2041/001
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In electromagnetically operated engine valve position controlling apparatus and method, after such an initialization before an engine start as to hold the engine valve (for example, an intake valve) at a closure position (or at a full open position) and hold another engine valve (for example, an exhaust valve) at the full open position (or at the closure position) is carried out, such a correction for an error in an output value of a position sensor to detect a displaced position of an armature with respect to a pair of electromagnets in the electromagnetically operated valve unit due to an aging effect as to correct a relationship of the output value of the position sensor to a normally detected value of the position of the armature is carried out on the basis of; for example, the two different output signal values of the position sensor which corresponds to a closure position of the intake valve and corresponds to the full open position of the exhaust valve. Other embodiments on the correction of relationship of the output value of the position sensor to the detected value of the position of the armature are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.