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US 2021/0372338 A1Published application
Injection control device
AssigneeDenso Corporation
InventorsYohei SUGANUMA, Ryohei TAKAHASHI, Hiroyuki FUKUDA, Masashi INABA
Life of this patent
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Abstract
An injection control device includes: a conversion coefficient setter setting a conversion coefficient for each injection when a fuel injection valve is driven by an electric current to inject fuel from the fuel injection valve; and an area correction unit calculating an energization time correction amount by performing area correction using the conversion coefficient for each injection regardless of whether a drive current of the fuel injection valve has reached a target peak current or not.
Claims11
An injection control device comprising:
- a conversion coefficient setter setting a conversion coefficient for each injection when a fuel injection valve is driven by an electric current to inject fuel from the fuel injection valve;
- and
- an area correction unit calculating an energization time correction amount by performing area correction using the conversion coefficient for each injection regardless of whether a drive current of the fuel injection valve has reached a target peak current or not.
A device comprising:
- a processor;
- and
- a non-transitory computer-readable storage medium,
- wherein the device is configured to:
- (i) determine an energization instruction time for a fuel injector based at least partly on at least one of:
- an accelerator opening degree, an estimated temperature of the fuel injector, a fuel pressure, and an Air/Fuel mixture;
- (ii) estimate an area between a normal current profile and an actual current profile, wherein the area is associated with a difference between an integration of the ideal current profile during the energization instruction time and an integration of the actual current profile during the energization instruction time;
- (iii) determine an area correction coefficient based at least partly on at least one of:
- the energization instruction time, and the fuel pressure;
- (iv) calculate an energization time correction amount based at least partly on the area and based at least partly on the area correction coefficient;
- and
- (v) energize the fuel injector during a corrected energization instruction time, wherein the corrected energization instruction time includes the energization instruction time and the energization time correction amount.
9 more elements
Dependencies are inferred from the claim text.