Jong N Lee

US Patent:

7790127, Sep 7, 2010

Filed:

Mar 2, 2009

Appl. No.:

12/395988

Inventors:

Jong H. Lee - Rochester Hills MI, US
Byong Kwon Cho - Rochester Hills MI, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

B01D 53/94
F01N 3/10
F01N 3/18
G05D 7/00

US Classification:

4232132, 4232137, 4232391, 4232453, 423247, 422105, 422108, 422111, 422168, 422169, 422170, 422172, 422177, 422180, 60299, 60301, 60306

Abstract:

A method of reducing NOin a lean burn engine exhaust stream from a hydrocarbon burning engine may be first passing the exhaust stream over a thrifted diesel oxidation catalyst that substantially completes the oxidation of carbon monoxide to carbon dioxide and the oxidation of hydrocarbons (HC) to carbon dioxide and water. Next, separate additions of ozone and ammonia or urea may be introduced to the exhaust gas stream upstream of the catalytic reduction reactor at temperatures below 250 degrees Celsius. The additions of ozone and ammonia or urea modify the exhaust gas composition to improve the performance of NOreduction catalysts in the catalytic reduction reactor. At temperatures above 250 degrees, the ozone addition may be reduced or eliminated, while the ammonia addition can be controlled as a function of the amount of NOx in the exhaust stream and the temperature of the catalytic reduction reactor.

US Patent:

8186151, May 29, 2012

Filed:

Jun 9, 2009

Appl. No.:

12/480932

Inventors:

Michael B. Viola - Macomb Township MI, US
Steven J. Schmieg - Troy MI, US
Thompson M. Sloane - Oxford MI, US
David L. Hilden - Shelby Township MI, US
Patricia A. Mulawa - Clinton Township MI, US
Jong H. Lee - Rochester Hills MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

F01N 3/00

US Classification:

60295, 60274, 60285, 60286, 60301

Abstract:

A method for initiating a regeneration mode in selective catalytic reduction device utilizing hydrocarbons as a reductant includes monitoring a temperature within the aftertreatment system, monitoring a fuel dosing rate to the selective catalytic reduction device, monitoring an initial conversion efficiency, selecting a determined equation to estimate changes in a conversion efficiency of the selective catalytic reduction device based upon the monitored temperature and the monitored fuel dosing rate, estimating changes in the conversion efficiency based upon the determined equation and the initial conversion efficiency, and initiating a regeneration mode for the selective catalytic reduction device based upon the estimated changes in conversion efficiency.

US Patent:

8225599, Jul 24, 2012

Filed:

Feb 26, 2010

Appl. No.:

12/713353

Inventors:

Kevin L. Perry - Fraser MI, US
Thompson M. Sloane - Kewadin MI, US
Jong H. Lee - Rochester Hills MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

F01N 3/36

US Classification:

60286, 60274, 60295, 60301

Abstract:

A method for supplying reductant into an exhaust gas feedstream for an internal combustion engine includes storing a fuel/reductant blend in the fuel storage and delivery system, separating the reductant from the fuel/reductant blend, storing the reductant in a reductant storage tank, and injecting the reductant into the exhaust gas feedstream upstream of the aftertreatment device.

US Patent:

8291695, Oct 23, 2012

Filed:

Dec 5, 2008

Appl. No.:

12/329162

Inventors:

Kevin L. Perry - Fraser MI, US
Thompson M. Sloane - Oxford MI, US
Jong H. Lee - Rochester Hills MI, US
Kushal Narayanaswamy - Sterling Heights MI, US
Wei Li - Troy MI, US
Paul M. Najt - Bloomfield Hills MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

F01N 3/00

US Classification:

60286, 60299

Abstract:

Exhaust emissions from a spark-ignition direct-injection engine connected to an oxidation catalytic device and a selective catalyst reduction device having a capacity to store ammonia reductant are controlled. The engine operates in a first combustion mode to generate ammonia reductant, stored on the second aftertreatment device. The engine operates lean of stoichiometry and nitrides of oxygen in the exhaust gas feedstream are reduced on the second aftertreatment device.

US Patent:

8635855, Jan 28, 2014

Filed:

Jun 17, 2009

Appl. No.:

12/485984

Inventors:

Rahul Mital - Rochester Hills MI, US
David B. Brown - Brighton MI, US
Yongsheng He - Sterling Heights MI, US
Jong H. Lee - Rochester Hills MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

F01N 3/00

US Classification:

60295, 60274, 60299, 60301

Abstract:

An exhaust gas treatment system for a diesel engine is disclosed. The exhaust gas treatment system includes a lean NOtrap (LNT) in fluid communication with a diesel engine to receive an exhaust gas flow therefrom. The system also includes a two-way catalyst in fluid communication with the LNT to receive the exhaust gas flow therefrom, the two-way catalyst comprising a urea selective catalytic reduction catalyst and a diesel particulate filter (DPF).

US Patent:

8046146, Oct 25, 2011

Filed:

Feb 3, 2006

Appl. No.:

11/346773

Inventors:

Douglas Charles Osborn - Royal Oak MI, US
James Andrew Techentin - Hartland MI, US
Jong Wook Lee - Ann Arbor MI, US

Assignee:

Kelsey-Hayes Company - Livonia MI

International Classification:

G08G 1/16

US Classification:

701 71, 701 70, 701 78, 701300, 701301, 701302, 30312201, 303139, 340435, 340436, 342107

Abstract:

A method is provided for adaptively determining an anti-lock braking strategy that includes monitoring a distance differential of at least one target in proximity to a driven vehicle. An anti-lock braking strategy is determined as a function of the distance differential. The anti-locking braking strategy is applied as a function of the distance differential.

US Patent:

20100050616, Mar 4, 2010

Filed:

Sep 3, 2008

Appl. No.:

12/203573

Inventors:

Jong H. Lee - Rochester Hills MI, US
David B. Brown - Brighton MI, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS, INC. - Detroit MI

International Classification:

F01N 3/10

US Classification:

60299, 60303

Abstract:

An apparatus for treating an exhaust gas feedstream from an internal combustion engine operating lean of stoichiometry comprises a particulate filter device comprising a porous substrate element having a hydrocarbon-selective catalytically reactive washcoat. The hydrocarbon-selective catalytically reactive washcoat comprises a silver-oxide catalytic material on an alumina-based washcoat. An injection device is operative to inject a hydrocarbon reductant upstream of the particulate filter device.

US Patent:

20100098612, Apr 22, 2010

Filed:

Oct 21, 2008

Appl. No.:

12/255069

Inventors:

JONG H. LEE - Rochester Hills MI, US
DAVID B. BROWN - Brighton MI, US
YONGSHENG HE - Sterling Heights MI, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS, INC. - Detroit MI

International Classification:

B01D 53/56
B01D 53/86
G01N 25/00
B01J 19/00

US Classification:

4232391, 422171, 422 83, 422 8212

Abstract:

An exemplary method and associated architecture for reducing NOand particulate matter emissions in an exhaust stream may include passing the exhaust stream through a catalytic oxidation reactor; passing the exhaust stream through a two-way selective reduction catalyst particulate filter located downstream of the catalytic oxidation reactor, wherein the two-way selective reduction catalyst particulate filter may include a wall flow filter substrate having internal walls coated with a first selective catalytic reduction catalyst; and passing the exhaust stream through a catalytic reduction reactor located downstream of the two-way selective reduction catalyst particulate filter, wherein the catalytic reduction reactor may include a second selective catalytic reduction catalyst.