Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2009-01-23
2009-12-01
Cronin, Stephen K (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S490000
Reexamination Certificate
active
07624721
ABSTRACT:
The invention relates to a drive circuit for an injector arrangement comprising a first fuel injector in parallel with a capacitive component. The drive circuit comprises: a selector means and diagnostic means. The selector means is operable to select the first fuel injector and/or the capacitive component into the drive circuit and to deselect the first fuel injector and/or the capacitive component from the drive circuit. When the capacitive component is selected and the first fuel injector is deselected, the diagnostic means is operable to sense a current through the first fuel injector. When the sensed current is at variance from a first threshold current the diagnostic means is operable to provide a first signal on detection of a stack terminal short circuit fault associated with the first fuel injector. The capacitive component may be a second fuel injector.
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Perryman Louisa J.
Sykes Martin A. P.
Cronin Stephen K
Delphi Technologies Inc.
Hoang Johnny H
Twomey Thomas N.
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