Fuel injection device for an internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorYasushi Ito
Life of this patent
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Abstract
A fuel injection device for an internal combustion engine having a fuel injector connected to a discharge port of a fuel supply pump, via a fuel passage, wherein a fuel pressure drop detecting unit detects a drop in the fuel pressure in the fuel passage caused by a plurality of fuel injections, while a fuel supply unit has stopped the supply of fuel from the fuel supply pump to the fuel passage, and a correction unit corrects an amount of fuel to be injected, to thereby make an actual total amount of fuel injection, determined on the basis of the fuel pressure drop, identical to a total of a target amount of fuel to be injected.
Claims21
A fuel injection device for an internal combustion engine having a fuel injector connected to a discharge port of a fuel supply pump, via a fuel passage, said device comprising:
- a calculating means for calculating a target amount of fuel to be injected, based on an engine speed and an engine load;
- a fuel pressure detecting means for detecting a fuel pressure in the fuel passage;
- a fuel supply stopping means for stopping a supply of fuel from the fuel supply pump to the fuel passage;
- a fuel pressure drop detecting means for detecting a drop in the fuel pressure in the fuel passage caused by a plurality of a fuel injection, on the basis of an output of said fuel pressure detecting means, while a supply of fuel by said fuel supply stopping means is stopped;
- an actual total amount of a fuel injection determining means for determining an actual total amount of fuel to be injected, based on the fuel pressure drop detected by said fuel pressure drop detecting means;
- a correction means for correcting an amount of fuel to be injected to make said actual total amount of fuel injection identical to a total of said target amount of fuel to be injected, based on a result of a determination of said actual total amount of a fuel injection by said determining means;
- and
- a fuel supply starting means for starting a supply of fuel from the fuel supply pump to the fuel passage when said fuel pressure drop detecting means detects a drop in the fuel pressure.
Dependencies are inferred from the claim text.