Carl Freudenberg Kg

Eagle Actuator Components Gmbh & Co. Kg

Trelleborgvibracoustic Gmbh

Christopher Klatt

Ralf Heinrich

Torsten Gerlich

Christof Klesen

Juergen Guenther

Thomas Stoesser

Heinz Reinhardt

Jürgen Berg

A method of providing error correction to flow velocity readings of a fluid flowing through a filter arrangement for monitoring the service life of the filter, wherein a filter arrangement, comprising a filter and a sensor device is arranged downstream of the filter, the sensor device including at least one measuring sensor for detecting the flow velocity of the fluid which flows through the filter, and a further measuring sensor for measuring the air humidity of the fluid which flows through the filter. A reading of said second sensor element provides an error correction to the first sensor element.

Filter arrangement

A system for the metered feeding of volatile fuel components, in particular into the intake manifold of an internal combustion engine of a motor vehicle, includes an electromagnetic canister-purge valve which is actuatable in proportional pulse-width modulation, and a closed-loop control circuit with which, for the purpose of compensating for external interferences, the coil current of the canister-purge valve is adjustable. The system is characterized in that at least one device provided for detecting a variable parameter that includes at least one of a mass flow through the valve, a volume flow through the valve, a distance between the valve seat and the sealing element of the valve, and a CHportion in the volume flow. The coil current is adjustable as a function of the parameter.

System for the metered feeding of volatile fuel components

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Heidelberg, Germany

Christopher Klatt