Imad S Abdul-Khalek

US Patent:

6964158, Nov 15, 2005

Filed:

Feb 10, 2003

Appl. No.:

10/361278

Inventors:

Imad Said Abdul-Khalek - San Antonio TX, US

Assignee:

Southwest Research Institute - San Antonio TX

International Classification:

F02M025/06

US Classification:

60278, 60274, 60279, 60297

Abstract:

An exhaust gas recirculation system for reducing NOemissions from engines, comprising an exhaust recovery means for passing an exhaust gas stream in molecular contact with a clean air engine intake stream. A molecular diffusion means separates particulate matter in the exhaust stream by molecular diffusion by exposing the two streams to each other and allowing molecular transfer to occur between the two streams, until near gas phase equilibrium is achieved. Little or no particle transfer takes place between the two streams due to their slow diffusion relative to gas phase species so that some of the oxygen present in the intake air stream is replace with with COand HO molecules from the exhaust.

US Patent:

7739869, Jun 22, 2010

Filed:

Feb 28, 2007

Appl. No.:

11/680326

Inventors:

Magdi Kaiser Khair - San Antonio TX, US
Martin B. Treuhaft - San Antonio TX, US
Imad S. Abdul-Khalek - San Antonio TX, US

Assignee:

Southwest Research Institute - San Antonio TX

International Classification:

F01N 3/00

US Classification:

60297, 60274, 60275, 60312, 95 29, 96175, 96389

Abstract:

A method and system for improving the performance of diesel particulate filters. Before entering the filter, the exhaust gas is subjected to sonic waves to agglomerate the particles.

US Patent:

7741127, Jun 22, 2010

Filed:

Jun 20, 2007

Appl. No.:

11/765734

Inventors:

Gordon James Johnston Bartley - San Antonio TX, US
Cynthia Chaffin Webb - San Antonio TX, US
Imad Abdul-Khalek - San Antonio TX, US

Assignee:

Southwest Research Institute - San Antonio TX

International Classification:

G01N 1/22
G01N 31/10
G01M 19/00
F01N 3/023

US Classification:

436181, 60276, 73 2333, 7311469, 436 37, 436155, 436159, 436160

Abstract:

A method of using a burner-based system to produce diesel exhaust gas that contains particulate matter of a desired composition, to simulate the PM matter in exhaust produced by a production-type diesel internal combustion engine.

US Patent:

20040139785, Jul 22, 2004

Filed:

Jul 15, 2003

Appl. No.:

10/620063

Inventors:

Imad Abdul-Khalek - San Antonio TX, US

International Classification:

G01N037/00

US Classification:

073/028010

Abstract:

An apparatus for real-time measurement of mass, size and number of solid particles of particulate matter in engine exhaust has a catalytic stripper to remove at least about 90% of a volatile fraction of the particulate matter and pass at least about 95% of a solid fraction of the particulate matter, and a micro-dilution tunnel to cool the test medium after passing through the catalytic stripper and prior to passing through a particle sizer and counter system. A method embodying the present invention includes removing a volatile fraction of the particulate matter carried in a sample test stream and comparing the sample after removal of the volatile fraction with a second sample in which the volatile fraction has not been removed. The difference between the two samples represents liquid phase of the volatile fraction of the tested exhaust gas.

US Patent:

20130133308, May 30, 2013

Filed:

Nov 28, 2011

Appl. No.:

13/305540

Inventors:

Qiang WEI - San Antonio TX, US
Imad Said Abdul-Khalek - San Antonio TX, US

Assignee:

Southwest Research Institute - San Antonio TX

International Classification:

F01N 11/00

US Classification:

60274, 60276

Abstract:

The present disclosure provides apparatus and methods to determine real-time total carbon content, non-inclusive of carbon dioxide, and/or solid carbon content of engine exhaust. For a total carbon content determination, substantially all carbon dioxide is removed from the exhaust, and thereafter substantially all the remaining carbon of the exhaust is oxidized to provide a quantity of carbon dioxide which then may be used to determine total carbon content of the exhaust. For solid carbon content determination, in addition to substantially all carbon dioxide being removed from the exhaust, substantially all carbon-containing non-solid substances are also removed from the exhaust, and thereafter substantially all the remaining carbon of the exhaust is oxidized to provide a quantity of carbon dioxide which then may be used to determine solid carbon content of the exhaust.

US Patent:

20130133440, May 30, 2013

Filed:

Nov 29, 2011

Appl. No.:

13/305947

Inventors:

Qiang Wei - San Antonio TX, US
Imad Said Abdul-Khalek - San Antonio TX, US

Assignee:

SOUTHWEST RESEARCH INSTITUTE - San Antonio TX

International Classification:

G01N 1/22

US Classification:

7386303

Abstract:

A diluter for diluting a sample flow of a test gas to allow subsequent measurement of emissions in the test gas. During a calibration mode, a first flow control element receives and controls the dilution flow, a second flow control element receives and measures only the dilution flow, and a third flow control element is closed. Also during calibration, the second flow control element is calibrated to the first flow control element. During a measurement mode, the same dilution flow rate is maintained in the first and second flow control elements, the sample flow and dilution flow are mixed, and the mixed flow flows into both the second flow control element and the third flow control element. Also during measurement, the third flow control element controls sample flow, and the second flow control element delivers a portion of the mixed flow to the instrument.

US Patent:

20230097032, Mar 30, 2023

Filed:

Oct 13, 2022

Appl. No.:

17/965129

Inventors:

- San Antonio TX, US
Imad Said Abdul-Khalek - San Antonio TX, US

International Classification:

G01N 27/70

Abstract:

A sensor for detecting properties of a gas, gas mixture, or a gas or gas mixture containing particles, all collectively referred to as a “gas”. A flow tube contains a pair of electrodes arranged such that at least a portion of the gas flows between the electrodes. A controller applies voltage to the electrodes and measures response data from the electrodes representing the voltage-current relationship between the electrodes while the gas is between the electrodes. Based on the response data, the controller determines a concentration of particles within the gas.

US Patent:

20210208101, Jul 8, 2021

Filed:

Jan 3, 2020

Appl. No.:

16/733574

Inventors:

- San Antonio TX, US
Imad Said Abdul-Khalek - San Antonio TX, US

International Classification:

G01N 27/70

Abstract:

A sensor for detecting properties of a gas, gas mixture, or a gas or gas mixture containing particles, all collectively referred to as a “gas”. A flow tube contains a pair of electrodes arranged such that at least a portion of the gas flows between the electrodes. A controller applies voltage to the electrodes and measures response data from the electrodes representing the voltage-current relationship and voltage breakdown between the electrodes while the gas is between the electrodes. Based on the response data, the controller determine a concentration of the gas or a concentration of particles within the gas.