公开(公告)号：US11085848B2

公开(公告)日：2021-08-10

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 H. 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.

公开(公告)号：US11092096B1

公开(公告)日：2021-08-17

申请号：US17009824

申请日：2020-09-02

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Min Sun ,  Jonathan M. Davis ,  Andrew M. Fedewa ,  Scott H. Wittkopp ,  Brandon Bishop

IPC: F02D41/14 ,  F02D41/02

Abstract: An engine system for a vehicle includes an internal combustion engine having an exhaust gas outlet, an exhaust system having a three-way catalyst and a switch-type post oxygen sensor, and an engine control module that controls the engine system. The engine control module includes a first control logic for estimating a three-way catalyst oxygen storage capacity based on a plurality of measured inputs, a second control logic for estimating aging effects of the switch-type post oxygen sensor, and a third control logic that calculates a filtered estimated three-way catalyst oxygen storage capacity for the three-way catalyst.

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.