EP 1400676 A2 20040324 - Injector system
Title (en)
Injector system
Title (de)
Treiberschaltung für eine Kraftstoff-Einspritzdüse
Title (fr)
Circuit de commande pour injecteur de carburant
Publication
Application
Priority
- US 25223702 A 20020923
- US 40371303 A 20030331
Abstract (en)
A drive circuit (20a,20b,20c) is provided in a full H-bridge and half H-bridge configuration for controlling one or more fuel injectors (12;12a,12b). The drive circuit (20a,20b,20c) includes a voltage input (22) for receiving a voltage signal, at least one energy storage device (C1;C11,C12;C21;C22) coupled to the voltage input (22) for storing an electrical charge, a bidirectional current path (26) coupled to the injector (12;12a,12b), at least one inductor (L1;L11;L21,L22) coupled to the injector, and switching means for controlling current flow through the injector and the inductor to open and close the injector. The switching means is controlled to provide a recirculation current to recover energy stored in the injector for storage in the energy storage device. A method of operating a drive circuit to control at least one fuel injector to reduce voltage ringing in the circuit is also described.
IPC 1-7
IPC 8 full level
F02D 41/20 (2006.01); H01L 41/04 (2006.01)
CPC (source: EP)
F02D 41/2096 (2013.01); F02D 2041/2051 (2013.01); F02D 2041/2058 (2013.01); F02D 2041/2072 (2013.01); F02D 2041/2082 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1400677 A2 20040324; EP 1400677 A3 20060322; EP 1400677 B1 20091118; EP 1400676 A2 20040324; EP 1400676 A3 20060322; EP 1400676 B1 20091216
DOCDB simple family (application)
EP 03255969 A 20030923; EP 03255966 A 20030923