Method and systems for engine fuel injection control
AssigneeGeneral Electric Company
InventorsPaul Gerard Nistler, Luke Henry, Jeffrey David Willis
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Abstract
Various methods and systems are provided for indexing an injector map and subsequently controlling fuel injection to an engine. In one embodiment, a non-transitory computer readable storage medium with memory comprises fuel injector activation data indexed in the memory according to an input parameter, instructions for determining a modified pressure value based on a determined pressure and a modified pressure function, and instructions for generating a fuel injector activation output by interpolating among the indexed fuel injector activation data with the modified pressure value as the input parameter.
Claims20
A non-transitory computer readable storage medium with memory, comprising:
- fuel injector activation data indexed in the memory according to an input parameter;
- instructions for determining a modified pressure value based on a determined pressure and a modified pressure function;
- and
- instructions for generating a fuel injector activation output by interpolating among the indexed fuel injector activation data with the modified pressure value as the input parameter.
A method for controlling a system having an engine, the method comprising:
- indexing fuel injector activation data in a computer memory as a function of a modified pressure function;
- linearly interpolating among the indexed injector activation data to determine an injector activation time at a determined fuel rail pressure based on the modified pressure function;
- and
- adjusting fuel injection of the engine based on the injector activation time.
A fuel rail system, comprising:
- a common fuel rail;
- a plurality of fuel injectors operable to inject fuel from the common fuel rail to cylinders of an engine;
- a non-transitory computer readable storage medium with memory, wherein an injector table is stored within the memory, and wherein the injector table comprises injector data indexed according to a modified pressure function;
- and
- a controller operable to control the fuel injectors based on a fuel injector activation time, wherein the controller is configured to determine the fuel injector activation time by interpolating the indexed injector data based on a determined fuel rail pressure and a quantity of fuel injected by a single fuel injector stroke.
Dependencies are inferred from the claim text.