Delphi Technologies, Inc.

Joseph A Engel

Joel Franklin Downey

Gordon D Cheever, Jr

Steven J Martin

Nigel P Baker

James J Blagrave

Edwin H Marx

Marvin G Hau

Germano D Nascimento

Laurence Chirez

Francois Herbin

An electrical drive arrangement of a fuel injection system comprising a power supply operatively connected to an injector driver stage which, in turn, is operatively connected to at least one fuel injector. The electrical drive arrangement includes a voltage regulation device operatively connected between the power supply and the injector driver stage, wherein the voltage regulation device is arranged to regulate the voltage supply from the power supply to the injector driver stage.

Electrical drive arrangement for a fuel injection system

A drive circuit is provided in a full H-bridge and half H-bridge configuration for controlling one or more piezoelectric fuel injectors. The drive circuit includes a voltage input for receiving a voltage signal, an energy storage device coupled to the voltage input for storing an electrical charge, a bidirectional current path coupled to one or more piezoelectric injectors, an inductor coupled in series with the piezoelectric injector(s) in the bidirectional current path, and switching circuitry for controlling current flow through the piezoelectric injector(s) and the inductor to open and close the piezoelectric injector(s). The switching circuitry is controlled to provide a recirculation current to recover energy stored in the piezoelectric injector(s) for storage in the energy storage device.

Piezoelectric injector drive circuit

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Obercorn, Luxembourg

Joseph A Engel