Robert Bosch

Matthias Beckert

Udo Schulz

Johannes-J&ouml;rg Rueger

Carsten Hermann

Michael Eichler

Lothar Jakobi

A transmission element having at least one input and at least one output is described, the transmission element delivering a functional relationship (t=F(R)) between the input quantity (R) applied to the input and the output quantity (t) that may be picked up at the output and the functional relationship (t=F(R)) being stored in a characteristics map, wherein the characteristics map comprises at least one segment having a lower limit (N(b)) and an upper limit (N(b()), a function value (t_(i)=F(N(b_i))) being assigned to the lower limit (N(b)) and a function value (t(i+)=F(N(b())) being assigned to the upper limit (N(b)), and the output quantity (t) being interpolated between the lower limit and the upper limit.

Transmission element having a segmented characteristics map

The invention describes a method and apparatus for operating a fuel injection system having a piezoelectric element ( or ) for controlling the amount of fuel injected into a combustion engine, characterized in that the piezoelectric element ( or ) is controlled based upon the charge it is carrying.

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Reutlingen, Germany

Matthias Beckert