Cynthia C Webb

US Patent:

6615580, Sep 9, 2003

Filed:

Sep 24, 2001

Appl. No.:

09/961442

Inventors:

Magdi K. Khair - San Antonio TX
Cynthia C. Webb - San Antonio TX
Gordon J. Bartley - San Antonio TX
Christopher A. Sharp - San Antonio TX

Assignee:

Southwest Research Institute - San Antonio TX

International Classification:

F01N 300

US Classification:

60286, 60274, 60285, 60288, 60311

Abstract:

A method for controlling diesel engine emissions is disclosed. The diesel engines exhaust system has a diesel particulate filter (DPF) and a lean NO trap (LNT). The DPF is a filter and is monitored to determine the need for regeneration. The LNT is monitored to determine the need for regeneration or desulfurization. A fuel injector is used to inject fuel upstream of the LNT under certain conditions, and a bypass may be used to bypass exhaust around the DPF to provide richer or hotter exhaust to the LNT. The sensor outputs and controls for providing the appropriate heat or fuel mix for regeneration and desulfurization may be controlled with enhancements to existing engine control circuitry.

US Patent:

6718757, Apr 13, 2004

Filed:

Jan 21, 2003

Appl. No.:

10/347722

Inventors:

Magdi K. Khair - San Antonio TX
Cynthia C. Webb - San Antonio TX
Gordon J. Bartley - San Antonio TX
Christopher A. Sharp - San Antonio TX

Assignee:

Southwest Research Institute - San Antonio TX

International Classification:

F01N 300

US Classification:

60286, 60274, 60276, 60285, 60288, 60295, 60297

Abstract:

A method for controlling diesel engine emissions is disclosed. The diesel engines exhaust system has a NO oxidation catalyst, a diesel particulate filter (DPF), and a lean NO trap (LNT). The DPF is monitored to determine the need for regeneration. The LNT is monitored to determine the need for regeneration or desulfurization. A fuel injector is used to inject fuel upstream of the LNT under certain conditions, and a bypass may be used to bypass exhaust around the oxidation catalyst to provide richer or hotter exhaust to the LNT.

US Patent:

6742328, Jun 1, 2004

Filed:

Oct 11, 2002

Appl. No.:

10/268896

Inventors:

Cynthia Chaffin Webb - San Antonio TX
Phillip Anthony Weber - San Antonio TX
Magdi K. Khair - San Antonio TX

Assignee:

Southwest Research Institute - San Antonio TX

International Classification:

F01N 300

US Classification:

60285, 60274, 60288, 60295, 60297, 60300

Abstract:

Systems and methods for controlling diesel engine emissions, including, for example, oxides of nitrogen emissions, particulate matter emissions, and the like. The emission control system according to this invention is provided in the exhaust passageway of a diesel engine and includes a catalyst-based particulate filter; and first and second lean NO trap systems coupled to the catalyst-based particulate filter. The first and second lean NO trap systems are arranged in a parallel flow configuration with each other. Each of the first and second lean NO trap systems include a carbon monoxide generating catalyst device, a sulfur trap device, a lean NO device, a supplemental fuel injector device, and a plurality of flow diverter devices.

US Patent:

6983645, Jan 10, 2006

Filed:

May 15, 2003

Appl. No.:

10/439146

Inventors:

Cynthia C. Webb - San Antonio TX, US
Bruce B. Bykowski - San Antonio TX, US
Gordon J. Bartley - San Antonio TX, US

Assignee:

Southwest Research Institute - San Antonio TX

International Classification:

G01M 15/00

US Classification:

731181

Abstract:

A method for accelerated aging of an automotive catalytic converter under conditions incorporating cold start simulation.

US Patent:

7032376, Apr 25, 2006

Filed:

Oct 14, 2003

Appl. No.:

10/685553

Inventors:

Cynthia C. Webb - San Antonio TX, US
Jeffrey A. Mathis - San Antonio TX, US

Assignee:

Southwest Research Institute - San Antonio TX

International Classification:

F01N 3/00

US Classification:

60297, 60274, 60286, 60289, 60290, 60303, 55DIG 10, 55DIG 30

Abstract:

A burner for use in the emissions system of a lean burn internal combustion engine. The burner has a special burner head that enhances atomization of the burner fuel. Its combustion chamber is designed to be submersed in the engine exhaust line so that engine exhaust flows over the outer surface of the combustion chamber, thereby providing efficient heat transfer.

US Patent:

7140874, Nov 28, 2006

Filed:

Aug 6, 2002

Appl. No.:

10/213890

Inventors:

Gordon J. Bartley - San Antonio TX, US
Cynthia C. Webb - San Antonio TX, US

Assignee:

Southwest Research Institute - San Antonio TX

International Classification:

F23M 9/00

US Classification:

431185, 431181, 431350, 731181

Abstract:

The present application relates in general to an apparatus and to methods for testing the performance of an automotive catalytic converter under conditions simulating those which occur in motor vehicles over extended driving conditions. The application provides a novel swirl plate and a novel fuel injector which enable the burner to run stoichiometric for extended periods of time.

US Patent:

7175422, Feb 13, 2007

Filed:

Jun 10, 2003

Appl. No.:

10/458023

Inventors:

Cynthia C. Webb - San Antonio TX, US
Brent A. Shoffner - San Antonio TX, US
Gordon J. Bartley - San Antonio TX, US

Assignee:

Southwest Research Institute - San Antonio TX

International Classification:

F23M 9/00

US Classification:

431 2, 431 4, 431 7, 431170, 731181

Abstract:

A method and apparatus for accelerated aging of an automotive catalytic converter under conditions incorporating volatilized oil consumption.

US Patent:

7195006, Mar 27, 2007

Filed:

Nov 29, 2005

Appl. No.:

11/288891

Inventors:

Magdi K. Khair - San Antonio TX, US
Yiqun Huang - San Antonio TX, US
Christopher A. Sharp - San Antonio TX, US
Cynthia C. Webb - San Antonio TX, US

Assignee:

Southwest Research Institute - San Antonio TX

International Classification:

F02M 25/07
F02B 47/08
F02B 33/44
F28F 27/02

US Classification:

12356812, 606052

Abstract:

A method and system for controlling the temperature of recirculated exhaust gas in an exhaust gas recirculation (EGR) system, such as those used in connection with diesel engines. An EGR loop (which may be either a high pressure loop or a low pressure loop) has a dual-leg segment with an EGR cooler on one leg and an EGR heater on the other leg. By means of a valve, the EGR gas may be diverted to either one leg or the other, thereby providing either cooled or heated EGR gas to the engine.