System and method for controlling fuel supplied to an engine
AssigneeFord Global Technologies, LLC
InventorsStephen William Magner, Mrdjan J. Jankovic
Life of this patent
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Abstract
Systems and methods for injecting fuel to an engine in response to a fuel injection delay are presented. The method includes determining fuel delay in a fuel injected engine with cylinders that may be deactivated. In one example, the fuel injection delay is determined via a cylinder firing schedule array when the cylinder firing schedule array is available. The fuel injection delay is determined via a weighted average of a fuel injection delay of a present engine cycle and a fuel injection delay of a past engine cycle when the cylinder firing schedule array is not available.
Claims7
An engine control method, comprising:
- injecting fuel to an engine via a controller in response to a fuel injection delay produced via adding a base cylinder fuel injection delay time and an extra fuel injection delay time, the base cylinder fuel injection delay time a first delay time for the engine when all cylinders of the engine are firing in a first cycle of the engine, the extra fuel injection delay time a second delay time for the engine when less than all cylinders of the engine are firing in a second cycle of the engine, the fuel injection delay beginning at a time when a fuel is injected to a cylinder and ending when byproducts of the fuel are sensed via an oxygen sensor.
Dependencies are inferred from the claim text.