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US 11,708,800 B2Granted
System and method for controlling fuel supplied to an engine
AssigneeFord Global Technologies, LLC
InventorsStephen William Magner, Mrdjan J. Jankovic
Life of this patent
Estimating the term…
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.
Claims18
An engine control method, comprising:
- injecting a fuel to an engine via a controller responsive to a fuel injection delay produced via a calculation including 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;
- and
- compensating for the fuel injection delay via a fuel controller included in the controller,
- where the present fuel injection delay of the present engine cycle is based on a value of a counter that is incremented in response to an absence of injecting fuel to the cylinder of an engine bank during a prescribed crankshaft angular interval of the present engine cycle.
1 more element
An engine system, comprising:
- an engine including one or more cylinder deactivating mechanisms;
- and
- a controller including executable instructions stored in non-transitory memory that when executed enable the controller to:
- determine if a cylinder firing schedule is available, and
- 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 the cylinder firing schedule array during a first condition, where the first condition is a condition when the cylinder firing schedule array is available,
- where the fuel injection delay is based on the fuel injection delay of a past engine cycle and the fuel injection delay of a present engine cycle during a second condition, where the second condition is a condition when the cylinder firing schedule array is not available, and
- where the fuel injection delay begins at a time when a fuel is injected to the cylinder and ending when byproducts of the fuel are sensed via an oxygen sensor.
5 more elements
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 calculation of 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 injection 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, 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.
1 more element
Dependencies are inferred from the claim text.