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US 12,540,583 B1Granted
Methods and systems for V8 engine fuel control
AssigneeFord Global Technologies, LLC
InventorsRani Kiwan, Stephen W. Magner, Michael Uhrich, Chris Paul Glugla, Michael Calvin McKinney, Stephen Lee Cooper
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, oxygen sensors are placed in an exhaust system of an engine such that each oxygen sensor may detect exhaust gas from a pair of engine cylinders. The oxygen sensors may then provide feedback to coupled and decoupled fuel controllers.
Claims20
A fuel control system, comprising:
- a first cylinder bank coupled to an exhaust system that includes a first oxygen sensor upstream of a first catalyst and a second oxygen sensor upstream of the first catalyst;
- a second cylinder bank coupled to the exhaust system that includes a third oxygen sensor upstream of a second catalyst and a fourth oxygen sensor upstream of the second catalyst;
- and
- a controller including executable instructions stored in non-transitory memory for a first fuel controller, a second fuel controller, a third fuel controller, and a fourth fuel controller.
1 more element
A method for operating an engine, comprising:
- supplying fuel to the engine via a first fuel controller, a second fuel controller, a third fuel controller, and a fourth fuel controller in response to a first lambda value determined via a first oxygen sensor, a second lambda value determined via a second oxygen sensor, a third lambda value determined via a third oxygen sensor, and a fourth lambda value determined via a fourth oxygen sensor.
A method for operating an engine, comprising:
- operating the engine with activated decoupled fuel controllers and deactivated coupled fuel controllers in a first mode;
- and
- operating the engine with deactivated decoupled fuel controllers and activated coupled fuel controllers in a second mode.
Dependencies are inferred from the claim text.