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US 12,662,974 B2Granted
Methods and systems for individual cylinder fuel-air ratio adaptation
AssigneeFord Global Technologies, LLC
InventorsRani Kiwan, Michael Uhrich, Chris Paul Glugla, Kenneth John Behr
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Abstract
Systems and methods for determining normalized fuel-air ratio error for a cylinder of an engine an engine are disclosed. In one example, the engine is operated in a four-cylinder mode to generate a first normalized fuel-air ratio error for a first cylinder and operated in an eight-cylinder mode to generate a second normalized fuel-air ratio error for a second cylinder.
Claims10
A method for operating an engine, comprising:
- operating the engine in a four-cylinder mode and generating a first normalized fuel-air ratio error for a first cylinder via a first feedback correction value generated from an oxygen sensor output produced while operating the engine in the four-cylinder mode;
- operating the engine in an eight-cylinder mode and generating a second normalized fuel-air ratio error for a second cylinder via the first normalized fuel-air ratio error and a second feedback correction value generated from the oxygen sensor output produced while operating the engine the eight-cylinder mode;
- and
- adjusting output of one or more fuel injectors in response to the first normalized fuel-air ratio error or the second normalized fuel-air ratio error.
1 more element
Dependencies are inferred from the claim text.