Robert Bosch

Roland Waschler

Johannes Georg Mueller

Edna Boos

The invention proposes a method for operating a metering system () with a plurality of metering valves () for an SCR catalyst system, in which opening times for the injection of reducing agent are calculated for the metering valves () based on a metering amount requirement. In the calculations of the opening times, a metering-valve-specific adaptation factor is used, w herein a deviation (&#x394;p) of a system pressure (p) in the metering system () from a target pressure (p) and a weighting factor are used for calculation of the metering-valve-specific adaptation factor. The weighting factor depends on a proportion (r, r) of the required metering amount ((formula (I)), (formula (II)) of the respective metering valve () in relation to a total metering amount ((formula (I)), (formula (II)) of all metering valves ().

Method for operating a system with a plurality of metering valves

A method for actuating a pump having a reciprocating piston or a diaphragm for pressure generation in a hydraulic system, the reciprocating piston or the diaphragm being moved by way of an actuator which is driven by a magnetic field of a magnet coil, and a system pressure in the hydraulic system being determined.

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Stuttgart, Germany

Roland Waschler