公开(公告)号：US20210063270A1

公开(公告)日：2021-03-04

申请号：US16560361

申请日：2019-09-04

Applicant: GM Global Technology Operations LLC

Inventor： Min Sun ,  Jonathan M. Davis ,  Andrew M. Fedewa ,  Scott MI Wittkopp ,  Gionata Cimini

IPC: G01M3/26 ,  F01N3/10

Abstract: A method of estimating the oxygen storage capacity of a catalyst includes providing an engine system having an internal combustion engine and an exhaust system having a catalyst and an oxygen sensor, providing a three-way catalyst observer model having a Kalman filter and a three-way catalyst kinetic model, estimating a three-way catalyst next time step state and a modeling error, linearizing the three-way catalyst observer model, filtering the estimated three-way catalyst next time step state, and calculating a covariance.