(19)
(11) EP 1 400 677 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
22.03.2006 Bulletin 2006/12

(43) Date of publication A2:
24.03.2004 Bulletin 2004/13

(21) Application number: 03255969.2

(22) Date of filing: 23.09.2003
(51) International Patent Classification (IPC): 
F02D 41/20(2006.01)
 H01L 41/04(2006.01)
(84) Designated Contracting States:
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
Designated Extension States:
AL LT LV MK

(30) Priority: 23.09.2002 US 252237
31.03.2003 US 403713

(71) Applicant: Delphi Technologies, Inc.
Troy, MI 48007 (US)

(72) Inventors:
  • Baker, Nigel
    Canterbury, Kent CT2 0LT (GB)
  • Martin, Steven
    Canterbury, Kent CT2 0NJ (GB)
  • Griffin, Peter
    Maidstone, Kent ME14 2EU (GB)

(74) Representative: Cummings, Sean Patrick et al
David Keltie Associates Fleet Place House 2 Fleet Place
London EC4M 7ET
London EC4M 7ET (GB)

   


(54) Injector system


(57) An injector system includes at least first and second injectors (22a, 22b), preferably of the piezoelectric type, and an injector drive control circuit. The drive control circuit (24) comprises select switch means (S1, S2) for controlling independent selection of the first or second injector (22a, 22b) to permit a discharging current to be supplied to the selected injector during a discharging mode so as to initiate an injection event, and charge/discharge switch means (Q1, Q2) for controlling whether the discharging current is supplied to the selected injector (22a, 22b) or whether a charging current is supplied to the selected injector during a charging mode so as to terminate the injection event. The first and second injectors (22a, 22b) are arranged electrically in parallel and operatively connected to the select and charge/discharge switch means (S1, S2, Q1, Q2) so that activation of the charge/discharge switch means to terminate the injection event results in respective voltages across the first and second injectors tending to equalise.







Search report