US 7,493,895 B2
System for the metered feeding of volatile fuel components
Christopher Klatt, Heidelberg (Germany); Torsten Gerlich, Bensheim (Germany); and Christof Klesen, Modautal (Germany)
Assigned to Carl Freudenberg KG, Weinheim (Germany)
Filed on Mar. 04, 2004, as Appl. No. 10/793,400.
Claims priority of application No. 103 10 109 (DE), filed on Mar. 06, 2003.
Prior Publication US 2004/0231646 A1, Nov. 25, 2004
Int. Cl. F02M 33/04 (2006.01); F02M 25/08 (2006.01); F02D 45/00 (2006.01)
U.S. Cl. 123—520  [137/554] 6 Claims
OG exemplary drawing
 
5. An electromagnetic canister purge-valve, comprising:
a valve seat;
a sealing element;
a plunger element attached to the sealing element, said plunger entirely formed of a ferrite such that said plunger element is a ferromagnetic element;
a coil at least partially adjacent to the plunger;
at least one detecting device configured to detect a position of the plunger element, the at least one detecting device including at least one electric conductor loop, wherein a magnetic flux through the at least one conductor loop generated by the ferromagnetic element changes as a function of a position change of the sealing element relative to the valve seat, and
a control unit connected within a closed-circuit control circuit, the closed-loop control circuit including a control algorithm configured to dynamically calibrate at least one of a fully open valve position and a fully closed valve position during a service life of the valve.