Process and device for driving a capacitive actuator

Details Process and device for driving a capacitive actuator Process and device for driving a capacitive actuator

H - Electricity

01

L

H01L 41/04 (2006.01) F02D 41/20 (2006.01)

Patent

CA 2263304

A process and device are disclosed for driving at least one capacitive actuator (P), in particular a piezoelectrically driven fuel injection valve of an internal combustion engine, by means of a microprocessor-controlled control circuit (ST) with a charging capacitor (C) which can be recharged by an energy source (V), which charges the at least one actuator through switches (X1 to X4) controlled by the control circuit, and into which said actuator is again discharged.

L'invention concerne un procédé et un dispositif pour la commande d'au moins un actionneur capacitif (P), en particulier une soupape d'injection de carburant de moteur à combustion interne, actionnée piézoélectriquement, au moyen d'un circuit de commande (ST) commandé par microprocesseur, comprenant un condensateur de charge (C) rechargeable par une source d'énergie (V), lequel charge le ou les actionneurs par l'intermédiaire de commutateurs (X1 à X4) commandés par le circuit de commande, et dans lequel ledit actionneur se décharge de nouveau.

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