Robert Boschgmbh

Alexander Hock

Udo Schulz

Patrick Mattes

Johannes-J&ouml;rg Rueger

Joerg Reineke

Johannes-Jörg Rueger

Jorg Reineke

Jörg Reineke

Johannes-Joerg Rueger

The invention describes an apparatus and a method for charging or discharging a piezoelectric element of a system, e.g., for a fuel injection system. The method and apparatus are characterized in that the current of a system is regulated as a function of a time characteristic and an event characteristic to achieve an effective low absolute average current.

Time- and event-controlled activation system for charging and discharging piezoelectric elements

The invention describes a method and an apparatus for charging a piezoelectric element of a fuel injection system for, for example, an internal combustion engine. The apparatus is characterized in that the piezoelectric element is activated by an activation voltage having a value set as a function of measured fuel pressure in the fuel injection system.

Method and apparatus for charging a piezoelectric element

Method and device for charging and discharging a piezoelectric element

A method and a device for charging and discharging a piezoelectric element. Both the charging and the discharging taking place, at least partially, via an element having an inductive effect on the charge and on the discharge current. The charge current and the discharge current, at least partially, are conducted via the same element having an inductive effect. It is therefore possible in a simple manner to carry out efficient charging and discharging of piezoelectric elements even in cramped conditions.

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Stuttgart, Germany

Alexander Hock