Method for controlling an injector with verification that...

Details Method for controlling an injector with verification that... Method for controlling an injector with verification that...

2006-10-24

2006-10-24

Kwon, John T. (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C123S478000, C361S152000

Reexamination Certificate

active

07124741

ABSTRACT:
A method for controlling an injector with verification that plunger movement has occurred; the method providing application of a time-variable voltage to the terminals of an injector drive circuit in order to cause a current wave to flow through said drive circuit; detection of a verification voltage between the terminals of the drive circuit once the current through the drive circuit has died away at the end of the injection phase, measurement of a verification time during which the verification voltage is greater than a first predetermined threshold value and diagnosis of the absence of plunger movement if the verification time is less than a second predetermined threshold value.

REFERENCES:
patent: 3777702 (1973-12-01), Fitzgerald
patent: 6138638 (2000-10-01), Morikawa
patent: 6981489 (2006-01-01), Petrone et al.
patent: 7055494 (2006-06-01), Nishimaki
patent: 2004/0065747 (2004-04-01), Petrone et al.
patent: 38 17 770 (1989-11-01), None
patent: 1 179 669 (2002-02-01), None
patent: 94/13991 (1994-06-01), None

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