Device for charging and discharging at least one piezoactuator for an injection valve of an internal combustion engine
US7729848B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 29, 2006 |
| Grant date | Jun 1, 2010 |
| Priority date | — |
| Expiry date | Apr 6, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/221
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A device for controlling at least one piezoactuator for an injection valve of an internal combustion engine, including a microcontroller that controls an output stage which generates the load current for charging and discharging the piezoactuator. The microcontroller controls the output stage through an integrated circuit. A discharge circuit interacts with the integrated circuit to reliably discharge the piezoactuator in case of a failure of the output stage and/or of a safety path of the microcontroller. The load current during the discharge is controlled by a control circuit having a controller which is part of the integrated circuit. The discharge circuit has emergency discharge elements that are activated in case of a failure of the controller or of the integrated circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.