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Title: Catalyst temperature maintenance systems and methods

Abstract

A catalyst temperature control system of a vehicle includes a fuel control module configured to control fuel injection based on a target air/fuel ratio that is fuel lean relative to a stoichiometric air/fuel ratio and a target fuel injection start timing. An exhaust gas recirculation (EGR) control module is configured to control an EGR valve based on a target EGR opening. An adjustment module is configured to, when a temperature of a catalyst in an exhaust system is less than a sum of a predetermined light-out temperature of the catalyst and a predetermined temperature and the target air/fuel ratio is fuel lean relative to the stoichiometric air/fuel ratio, based on a comparison of an engine speed and a predetermined engine speed, selectively adjust at least one of: a target throttle opening, a target spark timing, the target fuel injection start timing, the target air/fuel ratio, and the target EGR opening.

Inventors:
; ; ;
Issue Date:
Research Org.:
GM Global Technology Operations LLC, Detroit, MI (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1600444
Patent Number(s):
10519883
Application Number:
15/995,579
Assignee:
GM Global Technology Operations LLC (Detroit, MI)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES
DOE Contract Number:  
EE0006853
Resource Type:
Patent
Resource Relation:
Patent File Date: 06/01/2018
Country of Publication:
United States
Language:
English

Citation Formats

Solomon, Arun S., Narayanaswamy, Kushal, Szekely, Jr., Gerald A., and Sczomak, David P.. Catalyst temperature maintenance systems and methods. United States: N. p., 2019. Web.
Solomon, Arun S., Narayanaswamy, Kushal, Szekely, Jr., Gerald A., & Sczomak, David P.. Catalyst temperature maintenance systems and methods. United States.
Solomon, Arun S., Narayanaswamy, Kushal, Szekely, Jr., Gerald A., and Sczomak, David P.. Tue . "Catalyst temperature maintenance systems and methods". United States. https://www.osti.gov/servlets/purl/1600444.
@article{osti_1600444,
title = {Catalyst temperature maintenance systems and methods},
author = {Solomon, Arun S. and Narayanaswamy, Kushal and Szekely, Jr., Gerald A. and Sczomak, David P.},
abstractNote = {A catalyst temperature control system of a vehicle includes a fuel control module configured to control fuel injection based on a target air/fuel ratio that is fuel lean relative to a stoichiometric air/fuel ratio and a target fuel injection start timing. An exhaust gas recirculation (EGR) control module is configured to control an EGR valve based on a target EGR opening. An adjustment module is configured to, when a temperature of a catalyst in an exhaust system is less than a sum of a predetermined light-out temperature of the catalyst and a predetermined temperature and the target air/fuel ratio is fuel lean relative to the stoichiometric air/fuel ratio, based on a comparison of an engine speed and a predetermined engine speed, selectively adjust at least one of: a target throttle opening, a target spark timing, the target fuel injection start timing, the target air/fuel ratio, and the target EGR opening.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {12}
}

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