Patent ID: 7525234

Claim:
A drive circuit for an injector arrangement having at least one injector, the drive circuit comprising: a first charge storage device configured and arranged for operative connection with one of the at least one injectors during a discharging phase so as to permit a discharge current to flow therethrough, thereby to initiate an injection event; a second charge storage device configured and arranged for operative connection with the at least one injector during a charging phase so as to cause a charge current to flow therethrough, thereby to terminate the injection event; a switch controller configured and arranged for controlling whether the first charge storage device is operably connected to the at least one injector or whether the second charge storage device is operably connected to the at least one injector; a first voltage rail at a first voltage level; a second voltage rail at a second voltage level higher than the first voltage level; a voltage supply; and a regeneration switch configured and arranged to be operable at the end of the charging phase to transfer charge from the voltage supply to at least the second charge storage device via an energy storage device, prior to a subsequent discharging phase.