The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 21, 2006
Filed:
May. 28, 2003
Marco Graf, Stuttgart, DE;
Andreas Huber, Steinheim, DE;
Marco Gangi, Esslingen, DE;
Andreas Juergen Rohatschek, Wernau/Necker, DE;
Udo Schulz, Vaihingen/Enz, DE;
Jens-holger Barth, Fellbach, DE;
Marco Graf, Stuttgart, DE;
Andreas Huber, Steinheim, DE;
Marco Gangi, Esslingen, DE;
Andreas Juergen Rohatschek, Wernau/Necker, DE;
Udo Schulz, Vaihingen/Enz, DE;
Jens-Holger Barth, Fellbach, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
In an internal combustion engine, fuel is injected directly into a combustion chamber by an injector that has a piezoactuator. An electrical charge conveyed to and/or removed from the piezoactuator is ascertained by a method that is calibrated at least once during an operating time span of the internal combustion engine. To allow the calibration to be carried out or performed as often as possible, the method for ascertaining the electrical charge transferred to and/or removed from the piezoactuator may be calibrated during at least one triggering off-time (dtK) of the piezoactuator while the internal combustion engine is operating.