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US 2015/0090227 A1Published application
High pressure fuel pump control for idle tick reduction
AssigneeFord Global Technologies, LLC
InventorsRoss Dykstra Pursifull, Paul Zeng
Life of this patent
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Abstract
A method for operating a solenoid valve coupled to the inlet valve of a fuel injection pump comprises adjusting a pull-in electrical energy of the solenoid valve based on a fuel injection pump volumetric efficiency.
Claims20
A method for operating a solenoid valve coupled to an inlet valve of a fuel injection pump, comprising:
- adjusting a pull-in electrical energy of the solenoid valve based on a fuel injection pump volumetric efficiency.
A method of controlling fuel injection in a direct injection fuel system, comprising:
- determining a pump volumetric efficiency of a fuel injection pump coupled to a fuel volume regulator, and in response to the determined pump volumetric efficiency, adjusting a valve pull-in current profile applied to the fuel volume regulator.
A vehicle system, comprising:
- an engine;
- a fuel system including a solenoid valve coupled to a fuel pump, the fuel system directly injecting fuel into the engine;
- and
- a controller, including instructions executable to:
- adjust a ramp rate of a valve pull-in current of the solenoid valve based on an efficiency of the fuel pump, wherein the adjusting is performed only in response to the fuel pump volumetric efficiency being less than a threshold pump volumetric efficiency.
2 more elements
Dependencies are inferred from the claim text.