Method for diagnosis in a fuel injection device comprising a piezoactuator
US7467543B2 · kind B2 · utility
5Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2004 |
| Grant date | Dec 23, 2008 |
| Priority date | — |
| Expiry date | Oct 18, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M63/0225
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for diagnosing a fuel injection device which includes a piezoelectric actuator, with which a valve element is actuated. The fuel injection device is connected to a diagnostic device which applies a defined voltage to the piezoelectric actuator. The charge introduced into the piezoelectric actuator, and from that a capacitance of the piezoelectric actuator, are ascertained by means of the diagnostic device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.