公开(公告)号：US09650981B1

公开(公告)日：2017-05-16

申请号：US14980079

申请日：2015-12-28

Applicant: GM Global Technology Operations LLC

Inventor： Thomas J. Large ,  Grant J. Ovist ,  Sharianne Ziola ,  Timothy Wendling ,  J. Michael Gwidt

IPC: F01N3/00 ,  F02D41/24 ,  F01N11/00 ,  F01N13/00 ,  F02D41/02 ,  F02D41/00 ,  F02M35/10 ,  G01M15/10

CPC classification number: F02M35/1038 ,  F01N11/007 ,  F01N2550/02 ,  F01N2560/025 ,  F01N2560/14 ,  F01N2900/0416 ,  F01N2900/1624 ,  F02D41/0087 ,  F02D41/0295 ,  F02D41/1441 ,  F02D41/1456 ,  F02D2200/0814 ,  F02D2200/0816 ,  F02M35/10386 ,  Y02T10/47

Abstract: A vehicle system includes an upstream oxygen monitoring module that monitors an upstream exhaust oxygen sensor and determines an upstream transition period based on a time at which the upstream exhaust oxygen sensor detects a rich-to-lean fueling transition. A delay determining module determines a delay period associated with the upstream exhaust oxygen sensor's detection of the fueling transition. An upstream correcting module determines a corrected upstream transition period based on the upstream transition period and the delay period. A downstream oxygen monitoring module monitors a downstream exhaust oxygen sensor and determines a downstream transition period based on the response of the downstream exhaust oxygen sensor to the fueling transition. An oxygen storage capacity (OSC) determining module determines an OSC period based on the corrected upstream transition period and the downstream transition period. A catalyst fault detection module selectively adjusts operating parameters of the engine based on the OSC period.