Variable valve performance apparatus for engine
US5924397A · kind A · utility
18Cited by
3References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1997 |
| Grant date | Jul 20, 1999 |
| Priority date | — |
| Expiry date | Nov 18, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L13/0042
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An apparatus for controlling valve performance in an engine is disclosed. A first detection blade helically extends on a camshaft. A pair of second detection blades are located on the camshaft and extend axially on the camshaft. An electromagnetic pickup is arranged to face the camshaft. The pickup produces a pulse in response to one of the blades passing by the pickup when the camshaft rotates. ECU computes the axial position of the camshaft based on the change in the time period from the pulse corresponding to the second blade to the pulse corresponding to the first blade.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.