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Steven R. Falta patents

Recent bibliographic sampling of Steven R. Falta patents listed/published in the public domain by the USPTO (USPTO Patent Application #,Title):



11/13/14 - 20140335432 - Systems and methods for estimating fuel cell states
Apparatus, methods, and systems for estimating hydrogen concentration and/or pressure in an anode compartment of a fuel cell stack in a fuel cell vehicle. In some implementations, the estimates are based on a correlation between a transient dip in voltage in response to an anode to cathode bleed event and...
Inventors: Manish Sinha, Matthew A. Lang, Daniel C. Di Fiore, Steven R. Falta (Gm Global Technology Operations Llc)

08/07/14 - 20140220468 - System and method for cooling a fuel cell-powered vehicle
A fuel cell system, including a plurality of bipolar plate assemblies, each assembly including a first plate and a second plate with an internal coolant flow path disposed therebetween, a flow path for a first reactant gas on a side of the first plate opposite the internal coolant flow path,...
Inventors: Matthew A. Lang, Steven R. Falta (Gm Global Technology Operations Llc)

06/12/14 - 20140162171 - Anode leak location detection
A system and method for quantifying an anode leak location in a fuel cell system. The system and method include determining there is a leak in an anode sub-system of a fuel cell stack and estimating a first effective leak area using a first leak flow value and first operating...
Inventors: Daniel C. Di Fiore, Manish Sinha, Steven R. Falta, Matthew A. Lang (Gm Global Technology Operations Llc)

06/12/14 - 20140162159 - Method for running a fuel cell system with a failed stack health monitor
A system and method for selectively operating a fuel cell stack in response to loss of a voltage signal from one or more fuel cells in the stack. If the voltage signal from the one or more fuel cells is lost, the method performs one or more remedial actions to...
Inventors: Derek R. Lebzelter, Steven R. Falta (Gm Global Technology Operations Llc)

05/01/14 - 20140120440 - Coolant flow pulsing in a fuel cell system
Systems and methods to control the delivery of coolant to a coolant loop within a vehicular fuel cell system. During periods of low power output from one or more fuel cell stacks, operation of a pump used to circulate coolant through the loop is intermittent, thereby reducing pump usage during...
Inventors: John P. Nolan, Steven R. Falta, Derek R. Lebzelter, Seth E. Lerner (Gm Global Technology Operations Llc)

02/06/14 - 20140033801 - Diagnosing injector failure via stack voltage response analysis
A system and method for determining whether an anode injector that injects hydrogen gas into an anode side of a fuel cell stack has failed. The method includes monitoring a voltage of the fuel cell stack and performing spectral analysis of the stack voltage to identify amplitude peaks in the...
Inventors: Manish Sinha, Daniel C. Di Fiore, John C. Fagley, Steven R. Falta (Gm Global Technology Operations Llc)

01/30/14 - 20140026633 - Extremum seeking algorithm in a variable time interval to detect anode pressure sensor stuck failure in a fuel cell system
A system and method for detecting an anode pressure sensor failure in a fuel cell system. The system and method include a controller that sets an initial minimum anode pressure sensor value and an initial maximum anode pressure sensor value. The controller determines a desired time interval for sampling anode...
Inventors: Jun Cai, Daniel C. Di Fiore, Steven R. Falta, Sergio E. Garcia, Carol A. Galskoy (Gm Global Technology Operations Llc)

05/16/13 - 20130122389 - Fuel cell bipolar plate exit for improved flow distribution and freeze compatibility
A fuel cell assembly is disclosed that utilizes a water transport structure extending from fuel cell plates of the assembly into fuel cell assembly manifolds, wherein the water transport structure facilitates the transport of liquid water from the fuel cell plates thereby minimizing the accumulation of liquid water and ice...
Inventors: Jon P. Owejan, Thomas W. Tighe, Jeffrey A. Rock, Thomas A. Trabold, Steven R. Falta (Gm Global Technology Operations Llc)

05/09/13 - 20130115540 - Fuel cell operation with a failed open injector
A system and method for controlling hydrogen gas flow to an anode side of a fuel cell stack using a pressure regulator in the event that an injector that normally injects the hydrogen gas into the fuel cell stack has failed in a stuck open position. During normal operation, the...
Inventors: Steven R. Falta, Rainer Pechtold, Daniel C. Di Fiore, Donald H. Keskula, Matthew A. Lang, Michael Leykauf, Joseph N. Lovria, Oliver Maier (Gm Global Technology Operatins Llc)

04/11/13 - 20130089797 - Anode purge and drain valve strategy for fuel cell system
A combined water drain and diluent gas purge valve routes fluid from the anode side of a fuel cell to the cathode inlet. When a purge of diluent gas is requested, the valve opens, draining any liquid present in the sump of a water separation device, for example. After the...
Inventors: Steven R. Falta, Matthew A. Lang, Daniel C. Di Fiore (Gm Global Technology Operations Llc)

12/20/12 - 20120321979 - Control strategy to prevent unexpected hydrogen flow to the cathode due to a failed pressure sensor while catalytic heating
A method for determining a flow of a gas through an injector and a flow of a gas through a valve in a fuel cell system. The method includes determining an injector flow estimation for the gas flowing through the injector and determining a valve flow estimation for the gas...
Inventors: Seth E. Lerner, Steven R. Falta (Gm Global Technology Operations Llc)

12/06/12 - 20120308904 - Fuel cell system having a fluid flow distribution feature
A fuel cell system includes a water vapor transfer unit and a fluid flow distribution feature, the water vapor transfer unit including a first plate having a plurality of first flow channels for receiving a flow of a first fluid therein, and a second plate having a plurality of second...
Inventors: Yan Zhang, Steven R. Falta, Steven D. Burch, Glenn W. Skala (Gm Global Technology Operations Llc)

10/25/12 - 20120270118 - Anode water separator for a fuel cell system
An anode reactant recycling system for a fuel cell is disclosed, the system including a hollow main body, a bleed conduit, an injector, a water separator, and a hydrophilic porous media. The anode reactant recycling system for a fuel cell is configured to minimize a required number of components, eliminate...
Inventors: Steven G. Goebel, Steven R. Falta, Jon P. Owejan (Gm Global Technology Operations Llc.)

10/11/12 - 20120255366 - Method to detect gross loss in coolant based on current feedback from the high temperature pump
A system and method for determining a loss of cooling fluid from a thermal sub-system in a fuel cell system. The method includes monitoring current feedback from a high temperature pump that pumps the cooling fluid through a coolant loop. A measured current from the pump is compared to an...
Inventors: Jun Cai, Seth E. Lerner, Loren Devries, Steven R. Falta (Gm Global Technology Operations Llc)

07/12/12 - 20120178010 - Fuel cell stack with asymmetric diffusion media on anode and cathode
The present invention provides a fuel cell having a membrane electrode assembly disposed between a first diffusion media that has a first set of material characteristics and a second diffusion media that has a second set of material characteristics. The membrane electrode assembly and the first and second diffusion media...
Inventors: Chunxin Ji, Steven R. Falta, Jeanette E. Owejan (Gm Global Technology Operations Llc)

03/01/12 - 20120052408 - Membrane permeation adjustment in pem fuel cell
A system and method for correcting an estimation of nitrogen in an anode side of a fuel cell stack. The system includes a fuel cell stack and a pressure sensor for measuring pressure in an anode sub-system. The system also includes a controller configured to control the estimation of nitrogen...
Inventors: Matthew A. Lang, Daniel C. Di Fiore, William H. Pettit, Steven R. Falta, John C. Fagley (Gm Global Technology Operations, Inc.)

06/30/11 - 20110159404 - Polyolefin support to prevent dielectric breakdown in pems
A fuel cell includes a first catalyst layer and a second catalyst layer. An ion conducting membrane is interposed between the first and second catalyst layers. The ion conducting layer includes a polyolefin support structure and an ion conducting polymer at least partially penetrating the polyolefin support structure. A set...
Inventors: Timothy J. Fuller, Steven R. Falta, Michael R. Schoeneweiss, Sean M. Mackinnon (Gm Global Technology Operations, Inc.)

06/16/11 - 20110138883 - Injector flow measurement for fuel cell applications
A method for determining the amount of fuel flow from a high pressure gas tank to the anode side of a fuel cell stack through pulsed injector. The anode sub-system pressure is measured just before the injector pulse and just after injector pulse and a difference between the pressures is...
Inventors: Steven R. Falta, Steven G. Goebel, Daniel C. Di Fiore, Ralf Senner (Gm Global Technology Operations, Inc.)

09/09/10 - 20100227230 - Anode water separator for a fuel cell system
An anode reactant recycling system for a fuel cell is disclosed, the system including a hollow main body, a bleed conduit, an injector, a water separator, and a hydrophilic porous media. The anode reactant recycling system for a fuel cell is adapted to minimize a required number of components, eliminate...
Inventors: Steven G. Goebel, Steven R. Falta, Jon P. Owejan (Gb Global Technology Operations, Nic.)

07/29/10 - 20100190078 - Shutdown strategy for enhanced water management
A system and method for providing a fuel cell stack purge to remove excess water during system shut-down. A compressor is operated at a shut-down speed to force water out of the cathode flow channels and draw water through the membrane from the anode flow channels so that a desired...
Inventors: Pinkhas A. Rapaport, Steven R. Falta, Derek R. Lebzelter, Eric J. Connor (Gm Global Technology Operations, Inc.)

07/29/10 - 20100190076 - Two stage, hfr-free freeze preparation shutdown strategy
A system and method for providing a fuel cell stack purge at fuel cell system shut-down. The method provides a two-stage purge process where the first stage purge uses humidified cathode air to get the fuel cell stack to a known stack hydration level from an unknown stack hydration level...
Inventors: John C. Fagley, Steven R. Falta (Gm Global Technology Operations, Inc.)

07/23/09 - 20090186253 - Bipolar plate design for passive low load stability
A fuel cell that includes a flow field plate having flow channels, where the flow channels include one enlarged stability flow channel for each set of a predetermined number of smaller flow channels. The stability channel provides a higher volume of flow therethrough, which prevents the accumulation of water at...
Inventors: Thomas A. Trabold, Steven R. Falta (Gm Global Technology Operations, Inc.)

06/04/09 - 20090142632 - Fuel cell stack features for improved water management
An electric insulator for a fuel cell stack with a plurality of fuel cell plates is provided. The electric insulator includes an insulation layer having a water management feature adapted to militate against liquid water contacting the fuel cell plates. Fuel cell stacks having the water management feature are also...
Inventors: Jon P. Owejan, Steven R. Falta, Thomas W. Tighe

05/07/09 - 20090117443 - Bipolar plate hydrophilic treatment for stable fuel cell stack operation at low power
A flow field plate or bipolar plate for a fuel cell that includes a hydrophilic coating formed on flow field channels extending through a tunnel region between a cell active area and the inlet and outlet manifolds. The flow field plates are an assembly of a cathode side unipolar plate...
Inventors: Thomas A. Trabold, Steven R. Falta, Pinkhas A. Rapaport, Reena L. Datta, Gayatri Vyas Dadheech (Gm Global Technology Operations, Inc.)

05/07/09 - 20090117432 - Water removal features for pemfc stack manifolds
A bipolar plate includes angled facets oriented to form V-shaped projections on the plate edge. Liquid leaving the reactant channels is drawn back into the V-shaped grooves of the projections, leaving no liquid to obstruct the channel exit openings. The bipolar plate includes one portion of the bipolar plate offset...
Inventors: Lee C. Whitehead, Steven R. Falta, Thomas A. Trabold, Jon P. Owejan, Thomas W. Tighe (Gm Global Technology Operations, Inc.)

04/23/09 - 20090104476 - Fuel cell stack with asymmetric diffusion media on anode and cathode
The present invention provides a fuel cell having a first diffusion and a second diffusion media having a membrane electrode assembly disposed therebetween. The first diffusion media includes a first set of material characteristics and the second diffusion media includes a second set of material characteristics. The first set of...
Inventors: Chunxin Ji, Steven R. Falta, Jeanette E. Owejan (Gm Global Technology Operations, Inc.)

03/12/09 - 20090068535 - Fuel cell bipolar plate exit for improved flow distribution and freeze compatibility
A fuel cell assembly is disclosed that utilizes a water transport structure extending from fuel cell plates of the assembly into fuel cell assembly manifolds, wherein the water transport structure facilitates the transport of liquid water from the fuel cell plates thereby minimizing the accumulation of liquid water and ice...
Inventors: Jon P. Owejan, Thomas W. Tighe, Jeffrey A. Rock, Thomas A. Trabold, Steven R. Falta

Gm Global Technology Operations Llc, Gm Global Technology Operatins Llc, Gm Global Technology Operations Llc., Gm Global Technology Operations, Inc., Gb Global Technology Operations, Nic.

Archived*
(*May have duplicates - we are upgrading our archive.)

20120321979 - Control strategy to prevent unexpected hydrogen flow to the cathode due to a failed pressure sensor while catalytic heating


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The bibliographic references displayed about Steven R. Falta's patents are for a recent sample of Steven R. Falta's publicly published patent applications. The inventor/author may have additional bibliographic citations listed at the USPTO.gov. FreshPatents.com is not associated or affiliated in any way with the author/inventor or the United States Patent/Trademark Office but is providing this non-comprehensive sample listing for educational and research purposes using public bibliographic data published and disseminated from the United States Patent/Trademark Office public datafeed. This information is also available for free on the USPTO.gov website. If Steven R. Falta filed recent patent applications under another name, spelling or location then those applications could be listed on an alternate page. If no bibliographic references are listed here, it is possible there are no recent filings or there is a technical issue with the listing--in that case, we recommend doing a search on the USPTO.gov website.

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