David C Vanburen from Mattapan, MA, age 35

Oxidation Catalyst Burn Threshold Adjustment To Avoid Quenching
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US Patent:

20120222399, Sep 6, 2012
Filed:

Mar 3, 2011
Appl. No.:

13/039351
Inventors:

David Michael VanBuren - Livonia MI, US
Thomas LaRose, JR. - Redford MI, US
Kari Jackson - Redford MI, US
Michael V. Taylor - Wolverine Lake MI, US
Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI
International Classification:

F01N 3/00
US Classification:

60274
Abstract:

A method of controlling an exhaust gas treatment system for an engine includes relating the usage of an oxidation catalyst to a temperature offset value, and increasing a current burn threshold temperature by the temperature offset value to define an adjusted burn threshold temperature. Hydrocarbons may be injected into a flow of exhaust gas when the temperature of the oxidation catalyst is equal to or greater than the adjusted burn threshold temperature. The temperature at which the hydrocarbons are injected into the exhaust gas is thereby increased to accommodate performance degradation in the oxidation catalyst, which extends the life of the oxidation catalyst.

Method Of Operating An Exhaust Gas Treatment System To Prevent Quenching During Regeneration
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US Patent:

20120240552, Sep 27, 2012
Filed:

Mar 21, 2011
Appl. No.:

13/052341
Inventors:

THOMAS LAROSE, JR. - Redford MI, US
DAVID MICHAEL VANBUREN - Livonia MI, US
PATRICK BARASA - Ann Arbor MI, US
MICHAEL V. TAYLOR - Wolverine Lake MI, US
KARI JACKSON - Redford MI, US
Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI
International Classification:

F01N 3/10
US Classification:

60274
Abstract:

A method of controlling an exhaust gas treatment system of a vehicle includes detecting a request to regenerate a particulate filter, and injecting hydrocarbons at an injection rate into a flow of exhaust gas upstream of an oxidation catalyst to heat the oxidation catalyst. The injection rate is increased at a current acceleration rate, and the current acceleration rate is reduced to define a reduced acceleration rate when the oxidation catalyst is quenched.

Method Of Determining If An Oxidation Catalyst Is Quenched Or Is Not Quenched
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US Patent:

20120240553, Sep 27, 2012
Filed:

Mar 21, 2011
Appl. No.:

13/052355
Inventors:

Thomas LaRose, JR. - Redford MI, US
David Michael VanBuren - Livonia MI, US
Kari Jackson - Redford MI, US
Patrick Barasa - Ann Arbor MI, US
Michael V. Taylor - Wolverine Lake MI, US
Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI
International Classification:

F01N 3/023
US Classification:

60274
Abstract:

A temperature of exhaust gas downstream of an oxidation catalyst is compared to a temperature of the exhaust gas upstream of the oxidation catalyst to determine if the downstream temperature is increasing over time or decreasing over time as hydrocarbons are injected into the flow of exhaust gas to regenerate a particulate filter. The oxidation catalyst is determined to be quenched when the temperature of the exhaust gas downstream of the oxidation catalyst remains constant or decreases over time as the rate at which the hydrocarbons are injected into the exhaust gas increases. The oxidation catalyst is determined to not be quenched when the temperature of the exhaust gas downstream of the oxidation catalyst increases over time as the rate at which the hydrocarbons are injected into the exhaust gas increases.

Oxidation Catalyst Monitoring
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US Patent:

20130283767, Oct 31, 2013
Filed:

Apr 30, 2012
Appl. No.:

13/459394
Inventors:

Kari Jackson - Redford MI, US
Thomas Larose, JR. - Howell MI, US
Sarah Funk - Canton MI, US
Michael V. Taylor - Wolverine Lake MI, US
David Michael VanBuren - Livonia MI, US
Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI
International Classification:

F01N 11/00
US Classification:

60274, 60286, 60277
Abstract:

A control method for monitoring an oxidation catalyst of an exhaust system is provided. The control method includes determining an open loop factor based on an aging factor and an efficiency curve; controlling an injection of hydrocarbons into an exhaust stream based on the open loop factor; and monitoring the oxidation catalyst based on the injection of hydrocarbons.