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US 12,669,098 B2Granted
Feedback fuel control for dual path exhaust system
AssigneeFord Global Technologies, LLC
InventorsRani Kiwan, Michiel J. Van Nieuwstadt, Chris Paul Glugla
Life of this patent
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Abstract
Systems and methods for controlling fuel that is supplied to cylinders of an internal combustion engine are described. In one example, the fuel is controlled in response to output of two different outer-loop fuel controllers. The fuel may be controlled according to the individual separate outputs of outer-loop controllers or the combined outputs of the two different fuel controllers.
Claims20
A fuel control method, comprising:
- in a first mode, adjusting a first inner-loop target value in response to a first outer-loop correction, and adjusting a second inner-loop target value in response to a second outer-loop correction;
- in a second mode, adjusting the first inner-loop target value in response to the second outer-loop correction, and adjusting the second inner-loop target value in response to the first outer-loop correction;
- and
- supplying fuel to an engine via a controller according to the first inner-loop target value and the second inner-loop target value,
- wherein switching between the first mode and the second mode is based on a change in an exhaust flow route from a direct exhaust flow path to a crossover exhaust flow path.
2 more elements
An engine system, comprising:
- an engine including a left cylinder bank and a right cylinder bank;
- a right cylinder bank exhaust system coupled to the right cylinder bank;
- a left cylinder bank exhaust system coupled to the left cylinder bank;
- a right to left crossover pipe coupling the right cylinder bank exhaust system to the left cylinder bank exhaust system;
- a left to right crossover pipe coupling the left cylinder bank exhaust system to the right cylinder bank exhaust system;
- a right valve positioned along the right cylinder bank exhaust system;
- a left valve positioned along the left cylinder bank exhaust system;
- a left upstream oxygen sensor;
- a right upstream oxygen sensor;
- a left downstream oxygen sensor;
- a right downstream oxygen sensor;
- and
- a controller including executable instructions stored in non-transitory memory that cause the controller to adjust a first inner-loop target value in response to outer-loop corrections generated via two different outer-loop controllers.
10 more elements
A fuel control method, comprising:
- adjusting an amount of fuel supplied to a cylinder bank of an internal combustion engine in response to a first outer-loop controller output from a first outer-loop controller and a second outer-loop controller output from a second outer-loop controller, wherein the first outer-loop controller output is based on a first downstream oxygen sensor positioned downstream of a first catalyst, wherein the second outer-loop controller output is based on a second downstream oxygen sensor positioned downstream of a second catalyst, wherein exhaust from the cylinder bank is routed to the first catalyst during a first set of conditions and the exhaust from the cylinder bank is routed to the second catalyst during a second set of different conditions.
Dependencies are inferred from the claim text.