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AssigneeFord Global Technologies, LLC
InventorsKen John Behr, Has R. Patel, Michael Igor Kluzner, Bob Roy Jentz
Estimating the term…
Air/fuel imbalance monitoring systems and methods for monitoring air/fuel ratio imbalance of an internal combustion engine having a plurality of engine cylinders are provided herein. An example of the method may include routing exhaust gas from a first group of cylinders to an exhaust gas oxygen sensor, and during selected operating conditions, indicating that air/fuel of at least one cylinder in the first group is imbalanced based on a response of the exhaust gas oxygen sensor at frequencies at or above firing frequency of the cylinders in the first group. An example of the system may include an exhaust gas oxygen sensor positioned in such a way that exhaust gas from the group of engine cylinders are routed to the exhaust gas oxygen sensor, and a controller configured to during selected operating conditions, indicate that air/fuel of at least one cylinder in the group is imbalanced based on a response of the exhaust gas oxygen sensor at frequencies at or above firing frequency of the cylinders in the group.
A method for monitoring air/fuel imbalance of an internal combustion engine, comprising:
A system for monitoring air/fuel ratio imbalance of an internal combustion engine having a first group of engine cylinders and a second group of engine cylinders, comprising
A method for monitoring air/fuel imbalance of an internal combustion engine having one or more of engine cylinder banks, each of the plurality of engine cylinder banks including a plurality of engine cylinders and a proportional oxygen sensor positioned at or downstream of a confluent point of an exhaust manifold of the internal combustion engine where various sub-branches of the exhaust manifold leading from individual engine cylinders of the plurality of engine cylinders gather but upstream of a confluent point where branches of the exhaust manifold leading from individual engine cylinder banks gather, the method comprising:
Dependencies are inferred from the claim text.