Method of controlling a piezoelectric actuator
US7856964B2 · kind B2 · utility
3Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 21, 2007 |
| Grant date | Dec 28, 2010 |
| Priority date | — |
| Expiry date | Apr 3, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/0602
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for controlling the displacement of a stack of a piezoelectric actuator for use in a fuel injector comprises determining a desired amount of charge (ΔQ) to be added or removed from the stack. The method further comprises determining an operating parameter of the fuel system and selecting a drive current level (PO, SO) and a drive time (topen, tclose) in accordance with the desired amount of charge (ΔQ) and the operating parameter, and driving the drive current through the stack for the drive time (topen, tclose) in order to add or remove the desired amount of charge (ΔQ).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.