David H Monroe

US Patent:

6938412, Sep 6, 2005

Filed:

Aug 7, 2003

Appl. No.:

10/636676

Inventors:

Wei Li - Troy MI, US
David R. Monroe - Bloomfield Hills MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F01N003/10

US Classification:

60300, 60274, 60285, 60298, 123198 F, 422169, 422177

Abstract:

An apparatus and a method for removing NOx from an exhaust stream of a lean-burn engine during an engine cold start are provided. The apparatus includes a close-coupled LNT coupled to a main LNT by a hollow conduit. NOx from the cold exhaust is initially stored on the close-coupled LNT. As the engine exhaust warms up, the close-coupled LNT reaches its operating temperature and reduces the stored NOx to N. When the temperature of the close-coupled LNT reaches approximately 350 C. , NOx is released from the close-coupled LNT, is absorbed on the main LNT, and is converted to Nduring fuel-rich conditions, The close-coupled LNT can be regenerated after the engine is turned off by providing heat. The released NOx during the regeneration of the closed-coupled LNT is absorbed by the main LNT. The stored NOx on the main LNT can be reduced to Nduring the next vehicle operation.

US Patent:

20040265201, Dec 30, 2004

Filed:

Jun 25, 2003

Appl. No.:

10/606193

Inventors:

Norman Dale Brinkman - Troy MI, US
David Monroe - Bloomfield Hills MI, US
David Hilden - Shelby Township MI, US
Patrick Szymkowicz - Shelby Township MI, US

International Classification:

B01D053/56

US Classification:

423/239100, 422/171000, 422/177000, 422/172000

Abstract:

In accordance with one embodiment of the present invention, a NOremoval system is provided for removing nitrogen oxides from a nitrogen oxide containing exhaust. The NOremoval system comprises a NOtreatment section, a diverter, and a hydrogen generation section. The NOtreatment section is configured to remove nitrogen oxides from the exhaust. The diverter is configured to extract water from the exhaust and deliver extracted water to the hydrogen generation section. The hydrogen generation section is configured to deliver hydrogen to the NOtreatment section. The NOremoval system is configured such that the delivery of the hydrogen to the NOtreatment section is substantially isolated from delivery of the exhaust to the NOtreatment section. In accordance with 37 CFR 1.72(b), the purpose of this abstract is to enable the United States Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract will not be used for interpreting the scope of the claims.

US Patent:

45489114, Oct 22, 1985

Filed:

Oct 17, 1984

Appl. No.:

6/661945

Inventors:

Michael J. D'Aniello - Rochester MI
David R. Monroe - Bloomfield Hills MI
Martin H. Krueger - Roseville MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

B01J 2396

US Classification:

502 28

Abstract:

Regeneration of a phosphorus poisoned automotive exhaust catalyst is accomplished in a preferred embodiment by washing the catalyst or soaking it to the point of incipient wetness with an aqueous solution of an acid such as HCl, HNO. sub. 3 or oxalic acid and subsequent heating of the wetted catalyst in air or other oxygen-containing gas.

US Patent:

56035543, Feb 18, 1997

Filed:

Feb 21, 1996

Appl. No.:

8/604624

Inventors:

David A. Monroe - Bloomfield Hills MI
John G. Thomas - Troy MI

Assignee:

Chrysler Corporation - Auburn Hills MI

International Classification:

B60B 2702
B60B 3516

US Classification:

3011051

Abstract:

A rear axle assembly has a rotatable rear axle extending lengthwise within an elongated rear axle tube. A wheel hub is mounted on the axle for rotation as a unit therewith. A bearing supports the wheel hub for rotation. The inner race of the bearing is rigidly connected to the wheel hub. The outer race of the bearing is rigidly connected to the axle tube.