Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2011-02-22
2011-02-22
Cronin, Stephen K (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S465000
Reexamination Certificate
active
07891339
ABSTRACT:
A control apparatus is provided to control a fuel injection apparatus. The fuel injection apparatus includes an accumulator that accumulates high-pressure fuel, at least one injector that injects the high-pressure fuel accumulated in the accumulator into a cylinder of an internal combustion engine, and a pressure sensor that senses fuel pressure in the accumulator and outputs a signal indicative of the sensed fuel pressure. The control apparatus includes an estimator, a determiner, and a setter. The estimator estimates an actual injection duration of the injector. The determiner determines, during the actual injection duration estimated by the estimator, a value of the fuel pressure in the accumulator based on the signal output from the pressure sensor. The setter sets a manipulated variable for controlling fuel injection quantity of the injector based on the value of the fuel pressure determined by the determiner.
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Japanese Office Action dated Nov. 11, 2008 issued in corresponding Japanese Application No. 2007-088471 with English Translation.
Takahashi Hidekazu
Tsuiki Toyomori
Castro Arnold
Cronin Stephen K
Denso Corporation
Nixon & Vanderhye P.C.
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