公开(公告)号：US10008049B2

公开(公告)日：2018-06-26

申请号：US15059452

申请日：2016-03-03

Applicant: GM Global Technology Operations LLC

Inventor： Wenbo Wang ,  Layne K. Wiggins ,  David R. Kosmalski

IPC: G07C5/08 ,  F01M13/00 ,  B60W10/00 ,  F02D41/22 ,  F01M11/10

CPC classification number: G07C5/0808 ,  B60W10/00 ,  F01M11/10 ,  F01M13/00 ,  F01M2013/0083 ,  F02D41/22 ,  F02D2200/025 ,  F02D2250/08 ,  G07C5/0816 ,  G07C5/0841 ,  Y02T10/40

Abstract: A fault diagnostic system of a vehicle includes a noise module that determines a noise value based on a plurality of differences between samples of a pressure signal generated by a pressure sensor located in a positive crankcase ventilation (PCV) system of an engine. A signal module determines a signal value based on the samples of the pressure signal generated by the pressure sensor located in the PCV system of the engine. A diagnostic value module determines a diagnostic value based on one of: (i) a product of the noise value and the signal value; and (ii) a sum based on the noise value and the signal value. A fault module selectively diagnoses a fault in the PCV system based on the diagnostic value and generates a malfunction indicator within a passenger cabin of the vehicle in response to the diagnosis of the fault in the PCV system.