Phillip Anthony Weber

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:

8522536, Sep 3, 2013

Filed:

May 21, 2009

Appl. No.:

12/470156

Inventors:

Rijing Zhan - San Antonio TX, US
Phillip A. Weber - San Antonio TX, US

Assignee:

Southwest Research Institute - San Antonio TX

International Classification:

F01N 3/00

US Classification:

60301, 60299, 60311

Abstract:

An exhaust gas emissions aftertreatment system for spark-ignition engines, which simultaneously reduces the particulate matter, HC, CO, and NOx content of the exhaust. Various embodiments of the system have both a closely-coupled TWC device, and an under-floor treatment device. The under-floor device has either TWC or NOx reduction functionality, depending on whether the engine is run under stiochiometric or lean burn operating conditions.

US Patent:

20100287915, Nov 18, 2010

Filed:

May 13, 2009

Appl. No.:

12/464996

Inventors:

Rijing Zhan - San Antonio TX, US
Phillip A. Weber - San Antonio TX, US

Assignee:

Southwest Research Institute - San Antonio TX

International Classification:

F01N 3/035
F01N 3/10
F01N 3/02

US Classification:

60297, 60299, 60311

Abstract:

A wall-flow exhaust gas emissions aftertreatment device for simultaneously reducing the particulate matter and NOx content of the exhaust. The device comprises a number of longitudinal inlet channels and outlet channels, the inlet channels being plugged at the exit face, and the outlet channels being plugged at the entry face. The interiors of the inlet channels are coated with a particulate matter catalyst coating, and the interiors of the outlet channels are coated with a selective catalyst reduction catalyst coating.

US Patent:

20130327019, Dec 12, 2013

Filed:

Jun 8, 2012

Appl. No.:

13/491758

Inventors:

Rijing Zhan - San Antonio TX, US
Phillip A. Weber - Fair Oaks Ranch TX, US
Michael A. Chadwell - San Antonio TX, US

Assignee:

SOUTHWEST RESEARCH INSTITUTE - San Antonio TX

International Classification:

F01N 11/00
F01N 3/20

US Classification:

60274, 60277, 60286

Abstract:

A method and system for treating exhaust emitted via an exhaust line from a diesel engine. A POC system is installed on the exhaust line, and has at least one diesel oxidation catalyst (DOC), a set of two or more particulate oxidation catalyst (POC) elements, a first differential pressure sensor (ΔP1) to measure the pressure difference across the first and all but the last POC elements, and a second differential pressure sensor (ΔP2) to measure pressure differences across the last POC element. During operation of the engine, ΔP1 is monitored to determine whether its POC elements require active regeneration, and ΔP2 is separately monitored to determine whether its (the last) POC element requires active regeneration.

US Patent:

20180334943, Nov 22, 2018

Filed:

May 16, 2017

Appl. No.:

15/596000

Inventors:

- San Antonio TX, US
Cary Henry - Helotes TX, US
Phillip Weber - Fair Oaks Ranch TX, US

International Classification:

F01N 9/00
F01N 3/20
F01N 3/28
F01N 11/00

Abstract:

A method of detecting urea-derived deposits in the exhaust line of an internal combustion engine having an SCR (selective catalyst reduction) aftertreatment system. A radio frequency (RF) transmitter is placed upstream of the SCR system's urea injector, and an RF receiver is placed downstream of the mixer. The transmitter and receiver are used to acquire baseline RF data representing a clean condition exhaust line without deposits. During subsequent operation of the engine, the transmitter and receiver are used to acquire subsequent RF data, which is compared to the baseline data after being corrected for temperature differences. If the comparison indicates the presence of one or more deposits, an alert signal is generated.