Injection control device
AssigneeDenso Corporation
InventorsYohei Suganuma, Masashi Inaba
Life of this patent
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Abstract
An injection control device of capable of correcting an energization time even in an S/N non-guaranteeable situation includes: an energization controller calculating an energization time correction amount based on an area correction performed by an energization time correction amount calculator regarding electric current flowing in a fuel injection valve when the fuel injection valve is electrically driven for injecting fuel; and an energization instruction time calculator correcting an energization instruction time for fuel injection in a next cycle and thereafter by using the energization instruction time correction amounts in or before a current cycle.
Claims4
An injection control device comprising:
- an area corrector calculating an energization time correction amount by performing area correction of electric current flowing through a fuel injection valve when the fuel injection valve is driven by electric current to inject fuel from the fuel injection valve;
- an energization instruction time calculator correcting an energization instruction time of a next injection based on:
- (i) a present energization time correction amount and
- (ii) previous energization time correction amounts;
- an air-fuel ratio (A/F) value obtainer capable of obtaining an A/F value using an A/F sensor;
- and
- an abnormality determiner determining abnormality based on a deviation of an obtained A/F value from a target A/F value, the obtained A/F value obtained by the A/F value obtainer which corresponds to the injection reflecting a correction with the energization time correction amount by the energization instruction time calculator.
A device comprising:
- a processor;
- and
- a non-transitory computer-readable storage medium,
- wherein the device is configured to:
- calculate a first area correction associated with a difference between an integrated ideal current profile and an integrated actual current profile for a first injection;
- determine that the first area correction is normal;
- determine that a steady operation is present;
- determine that a previous area correction was performed in a previous cycle;
- store a first energization time correction amount associated with the first injection;
- determine that energization time correction amounts have been stored a preset number of times;
- calculate and store an average energization time correction amount;
- and
- set a correction completion flag to ON.
Dependencies are inferred from the claim text.