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US 9,810,229 B2Granted
Methods and systems for detecting compressor recirculation valve faults
AssigneeFord Global Technologies, LLC
InventorsAdam Nathan Banker, Baitao Xiao, Hamid-Reza Ossareh
Life of this patent
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Abstract
Methods are provided for identifying degradation in components of a compressor recirculation valve (CRV). One method may include inferring degradation of the CRV based on adaptation of a compressor surge line outside an expected range.
Claims7
An engine operating method comprising:
- globally adapting a compressor surge line stored in non-transitory memory of an engine controller;
- via the engine controller,
- responsive to the global adaptation being a first global adaptation including the compressor surge line being advanced beyond an advance limit, indicating degradation of a compressor recirculation valve (CRV) the degradation of the CRV comprising a CRV opening being more than a desired CRV opening;
- and
- responsive to the global adaptation being a second global adaptation including the compressor surge line being retarded beyond a retard limit, indicating degradation of the CRV, the degradation of the CRV comprising a CRV opening being less open than the desired CRV opening.
2 more elements
An engine operating method, comprising:
- globally adapting a compressor surge line stored in memory of an engine controller;
- via the engine controller,
- responsive to the global adaptation being a first global adaptation including the compressor surge line being advanced beyond an advance limit, indicating degradation of a compressor recirculation valve (CRV) the degradation of the CRV comprising a CRV opening being more than a desired CRV opening;
- and
- responsive to the global adaptation being a second global adaptation including the compressor surge line being retarded beyond a retard limit indicating degradation of the CRV, the degradation of the CRV comprising the CRV opening being less open than the desired CRV opening,
- wherein globally adapting the surge line includes retarding the compressor surge line in response to a number of compressor surge events greater than a threshold number of compressor surge events, and advancing the compressor surge line in response to a number of tip-out events greater than a threshold number of tip-out events.
3 more elements
Dependencies are inferred from the claim text.