公开(公告)号：US20240229692A1

公开(公告)日：2024-07-11

申请号：US18571854

申请日：2022-09-19

Applicant: DELPHI TECHNOLOGIES IP LIMITED

Inventor： Noureddine EL HOR ,  Davy DECORPS

IPC: F01M11/10

CPC classification number: F01M11/10 ,  F01M2250/60

Abstract: A method for positive crankcase ventilation diagnosis in an engine system with an engine, an intake duct connected to the engine, a PCV line connecting a crankcase of the engine with the intake duct and a sensor for determining an actual PCV pressure (pact) in the PCV line. The method comprises the steps of:



performing a diagnosis measurement by repeatedly determining at least one input parameter (pint, ne, patm, Q), which is linked to the operation of the engine system, and the actual PCV pressure (pact), to obtain a plurality of data samples for a plurality of sample times (ts);
using a prediction model (M) to determine a predicted PCV pressure (ppre); and
comparing the actual PCV pressure (pact) with the predicted PCV pressure (ppre) to diagnose the PCV line,
wherein a diagnosis of the PCV line is based on a model error (perr).