Patent ID: 9534543
Date: 2017-01-03
CPC Classifications: F02D,F02M

Claim:
1. A system comprising: a deceleration fuel cut-off (DFCO) module configured to operate in a DFCO mode to deactivate fuel to a cylinder of an engine; a first flow rate module configured to determine a reaction gas flow rate; an offset module configured to determine a temperature offset value based on the reaction gas flow rate; a first temperature module configured to estimate a first temperature of a catalyst of an exhaust system of the engine; a summer configured to sum the temperature offset value and the first temperature to generate a summation value; a second temperature module configured to estimate a second temperature of the catalyst based on the summation value; and a comparison module configured to (i) perform a first comparison between the second temperature and a threshold, and (ii) generate an inhibit signal to inhibit operation in the DFCO mode based on the first comparison, wherein the DFCO module is configured to temporarily deactivate the DFCO mode based on the inhibit signal.