Julie Anne Stuart

US Patent:

7386375, Jun 10, 2008

Filed:

Sep 7, 2004

Appl. No.:

10/935452

Inventors:

Martin M Hoch - Webster NY, US
Julie A Stuart - Farmington NY, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

G06F 17/00
B60L 9/00

US Classification:

701 22, 180 22

Abstract:

A reformer fuel feed stream in fuel cell power system is catalytically reacted into a reformate stream for a fuel cell stack by adjusting fuel supply throughput according to a predefined throughput ramp when a time derivative and the current demand for the fuel cell deviates from zero by more than an acceleration threshold value. The fuel cell power system is of special value when deployed on a vehicle where the load command is derived from the accelerator pedal of the vehicle.

US Patent:

20030226399, Dec 11, 2003

Filed:

Jun 6, 2002

Appl. No.:

10/164293

Inventors:

Bruce Clingerman - Palmyra NY, US
Donald Keskula - Webster NY, US
Julie Stuart - Rochester NY, US

International Classification:

G01M019/00

US Classification:

073/11900A

Abstract:

A diagnostic system and method identifies fuel injector failure in a fuel cell system including a fuel processor and a fuel source. A fuel injector supplies fuel from the fuel source to the fuel processor. A pressure sensor generates a pressure signal based on pressure between the fuel source and the fuel injector. A fuel injector diagnostic identifies fuel injector failure based on the pressure signal. The fuel injector diagnostic includes a moving window tracker that tracks the pressure signal over a moving window. The fuel injector diagnostic further includes a standard deviation or variance calculator that generates a standard deviation or variance based on the pressure signal in the moving window.