Method for controlling a piezo-actuated fuel-injection valve

US7040297B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Dirk Baranowski · Regensburg, DE
• Lorand D'Ouvenou · Regensburg, DE
• Hellmut Freudenberg · Bad Abbach, DE
• Christian Hoffmann · Leonberg, DE
• Wolfgang Lingl · Kulmain, DE
• Richard Pirkl · Regensburg, DE

Key dates

• Filing date: Mar 5, 2004
• Grant date: May 9, 2006
• Expiry date: Jun 29, 2024

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M51/0603
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The current guided to the piezo actuator and the voltage which is consequently established thereon is used for calculating with the help of a non-linear actuator model, the characteristics of the longitudinal variations (s) and the force (F) exerted by the actuator (F), and variables therefrom or the derived variables (dF/dt) therefrom determine the beginning of the opening (tA) of a servovalve and the duration of injection (D).