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US 10,947,923 B2Granted
Method and system for determining fuel injector variability
AssigneeFord Global Technologies, LLC
InventorsRoss Pursifull, Joseph Lyle Thomas, Michael Uhrich
Life of this patent
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Abstract
Methods and systems are disclosed for operating an engine that includes fuel injectors that supply fuel to cylinders of the engine. According to the methods and system, variation of individual fuel injection amounts injected by a sole fuel injector are determined so that it may be determined if individual fuel injector variation may be contributing to engine air-fuel ratio variation.
Claims11
An engine operating method, comprising:
- repeatedly commanding a fuel injector a same, fixed, amount to produce corresponding actual fuel injection amounts;
- binning the actual fuel injection amounts;
- and
- adjusting operation of the fuel injector during subsequent fuel injection operation to the repeated commanding based on a bimodal fuel injection distribution in the binned actual fuel injection amounts produced via the fuel injector.
1 more element
A system for operating an engine, comprising:
- an engine including a first fuel injector to inject fuel to an engine cylinder;
- and
- a controller including executable instructions stored in non-transitory memory to:
- repeatedly command the fuel injector a same, fixed, amount to produce corresponding actual fuel injection amounts, bin actual the fuel injection amounts;
- and adjust operation of the fuel injector during subsequent fuel injection operation to the repeated commanding in response to a bimodal fuel injection distribution in the binned actual fuel injection amounts produced via the fuel injector.
2 more elements
Dependencies are inferred from the claim text.