F - Mech Eng,Light,Heat,Weapons – 02 – D
Patent
F - Mech Eng,Light,Heat,Weapons
02
D
F02D 41/20 (2006.01) F04B 17/04 (2006.01) H01F 7/18 (2006.01)
Patent
CA 2217532
A process is disclosed for driving the exciting coil of an electromagnetically driven reciprocating piston pump used as a fuel injection device. The exciting coil is excited by high frequency pulses generated by a current regulating circuit and each pulse causes an abrupt move of the armature driven by the exciting coil. The current regulating circuit regulates the exciting current that flows through the exciting coil depending on a current set value curve. Each pulse of the current set value curve has a progressively rising flank to which corresponds a progressively rising flank of the exciting current pulse in the exciting coil. The current set value curve is controlled in such a way that the exciting current does not change faster than the mutual inductance- limited, maximum current variation possible at the minimum voltage available at the exciting coil.
L'invention concerne un procédé de pilotage de la bobine d'excitation d'une pompe à piston alternatif et à commande électromagnétique utilisée comme injecteur de carburant. La bobine d'excitation est excitée par des impulsions de haute fréquence générées par un circuit de commande du courant et chaque impulsion fait se déplacer de manière saccadée un induit entraîné par la bobine d'excitation. Le circuit de commande de courant commande le courant d'excitation qui s'écoule à travers la bobine d'excitation en fonction d'une courbe de valeurs nominales de courant. Chaque impulsion de la courbe de valeurs nominales de courant comprend un flanc progressivement ascendant auquel correspond un flanc progressivement ascendant de l'impulsion de courant d'excitation dans la bobine d'excitation. La courbe de valeurs nominales de courant est réglée de sorte que le courant d'excitation ne se modifie pas plus rapidement que la plus grande variation de courant possible lié à la tension minimale disponible au niveau de la bobine d'excitation, cette plus grande variation de courant possible étant limitée par l'induction mutuelle.
Bartsch Knut
Heimberg Wolfgang
Dennison Associates
Ficht Gmbh & Co. Kg
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