FIELD: fuel injection control for internal-combustion engines. SUBSTANCE: device has microprocessor-regulated control system S for at least one capacitive final-control element P such as fuel-injection valve of internal-combustion engine actuated by piezoelectric device, and charging capacitor C trickle-charged from power supply V and used to charge final-control element through switches X1-X4 controlled by circuit ST and to discharge it again. EFFECT: reduced loss, simplified design. 5 cl, 4 dwg
