METHOD AND SYSTEM FOR POSITIVE CRANKCASE VENTILATION (PCV) DIAGNOSTICS

Abstract: methods and systems are provided for implementing a diagnostic technique for a positive crankcase ventilation (pcv) assembly. in one example, the method includes generating an estimated crankcase pressure at the location of a crankcase pressure sensor based on a nominal model and a faulted model of a pcv system that is generated by a controller. the method further includes diagnosing a pcv system component based on a difference between the estimated crankcase pressure and an input from the crankcase pressure sensor; and responsive to the crankcase pressure sensor having a faulted diagnosis, triggering a sensor degradation indicator.

Inventor(s): Adam Krach, Michael Casedy, Jose Francisco Martinez Leyva, Katherine Jane Brewer, Erzabeth Holcombe, Hussein Saab

CPC Classification: F01M13/028 (by means of additional source of positive or negative pressure)

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