公开(公告)号：US11085390B2

公开(公告)日：2021-08-10

申请号：US16696134

申请日：2019-11-26

Applicant: GM Global Technology Operations LLC

Inventor： Robert Gallon ,  Michael A. Smith ,  Matt Pedigo

IPC: F02D41/12 ,  F02D41/14 ,  F02D13/02 ,  F02D9/02

Abstract: A control system for a fuel cutoff system of a motor vehicle includes a fuel cutoff module that generates a fuel cutoff signal for disabling a supply of fuel to an engine, in response to the fuel cutoff module detecting a deceleration fuel cutoff (DFCO) event. The control system further includes an oxygen storage module determining an amount of oxygen accumulated in a catalyst and comparing this amount to an oxygen storage capacity (OSC) of the catalyst, in response to the fuel cutoff module determining the DFCO event. The control system further includes an intake valve timing module generating a phasing signal to actuate a plurality of cam phasers to reduce a flow rate of oxygen to the catalyst, in response to the fuel cutoff module determining the DFCO event and the oxygen storage module determining that the amount of oxygen stored in the catalyst is less than the OSC.

公开(公告)号：US20210156324A1

公开(公告)日：2021-05-27

申请号：US16696134

申请日：2019-11-26

Applicant: GM Global Technology Operations LLC

Inventor： Robert Gallon ,  Michael A. Smith ,  Matt Pedigo

IPC: F02D41/12 ,  F02D41/14 ,  F02D13/02 ,  F02D9/02

Abstract: A control system for a fuel cutoff system of a motor vehicle includes a fuel cutoff module that generates a fuel cutoff signal for disabling a supply of fuel to an engine, in response to the fuel cutoff module detecting a deceleration fuel cutoff (DFCO) event. The control system further includes an oxygen storage module determining an amount of oxygen accumulated in a catalyst and comparing this amount to an oxygen storage capacity (OSC) of the catalyst, in response to the fuel cutoff module determining the DFCO event. The control system further includes an intake valve timing module generating a phasing signal to actuate a plurality of cam phasers to reduce a flow rate of oxygen to the catalyst, in response to the fuel cutoff module determining the DFCO event and the oxygen storage module determining that the amount of oxygen stored in the catalyst is less than the OSC.