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US 2020/0291883 A1Published application
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 determining fuel delay in a fuel injected engine with cylinders that may be deactivated are presented. 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 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.
Claims21
An engine control method, comprising:
- injecting a fuel to an engine via a controller in response to a fuel injection delay produced via a past fuel injection delay of a past engine cycle and a present fuel injection delay of a present engine cycle, the fuel injection delay beginning at a time when the fuel is injected to a cylinder and ending when byproducts of the fuel are sensed via an oxygen sensor.
8-14. (canceled)
An engine system, comprising:
- an engine including one or more cylinder deactivating mechanisms;
- a controller including executable instructions stored in non-transitory memory that when executed enable the controller to:
- inject an amount of fuel to a cylinder of the engine in response to a fuel injection delay, where the fuel injection delay is based on a cylinder firing schedule array when the cylinder firing schedule array is available, and the fuel injection delay of a past engine cycle, and the fuel injection delay of a present engine cycle when the cylinder firing schedule array is not available, the fuel injection delay beginning at a time when a fuel is injected to the cylinder and ending when byproducts of the fuel are sensed via an oxygen sensor.
A system, comprising:
- an engine comprising a plurality of cylinders and a plurality of cylinder deactivating mechanisms;
- and
- a controller with computer-readable instructions stored on non-transitory memory thereof that when executed enable the controller to:
- inject fuel to a cylinder of the plurality of cylinders in response to a fuel injection delay produced based on a combination of a past fuel injection delay of a past engine cycle and a present fuel injection delay of a present engine cycle, wherein the fuel inject delay is generated via multiplying the present fuel injection delay and a value of one minus a weighting factor and multiplying the past fuel injection delay and the weighting factor.
1 more element
Dependencies are inferred from the claim text.