Method, computer program, and open- and/or closed-loop control unit for operating an internal combustion engine, and internal combustion engine

US7016780B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Marco Graf · Tamm, DE
• Andreas Huber · Holzgerlingen, DE
• Marco Gangi · Eßlingen, DE
• Andreas-Juergen Rohatschek · Wernau, DE
• Udo Schulz · Gießen, DE
• Jens-Holger Barth · Fellbach, DE

Key dates

• Filing date: May 28, 2003
• Grant date: Mar 21, 2006
• Expiry date: May 28, 2023

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D41/2477
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

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.