Method for controlling an injection valve, fuel injection system, and internal combustion engine

US8714140B2 · kind B2 · utility

Assignee

• CONTINENTAL AUTOMOTIVE GMBH · DE

Inventors

• Fredrik Borchsenius · Donaustauf, DE
• Hong Zhang · Schwieberdingen, DE

Key dates

• Filing date: Mar 23, 2009
• Grant date: May 6, 2014
• Expiry date: May 17, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method and system for controlling an injection valve has the following steps: recording a voltage curve of a voltage present at a piezoelectric actuator of the injection valve and a time characteristic curve of an electric charge which is shifted in a circuit with the piezoelectric actuator during a reference injection, computationally determining a force curve of a force applied by the piezoelectric actuator to a moving closing element of the injection valve during the reference injection from the voltage curve and the time characteristic curve of the electric charge, determining a location of a maximum of the force curve,—specifying an activation time instant and/or an activation duration and/or an activation pulse intensity for at least one subsequent injection as a function of a time offset between an activation time instant selected for the reference injection and the maximum of the force curve.