Patents Represented by Attorney Kathryn A. Marra
  • Patent number: 7141216
    Abstract: A device for producing hydrogen includes a container housing a water-based solution and a metal constituent. A generator ultrasonically irradiates the water-based solution in the presence of the metal constituent to produce hydrogen gas.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: November 28, 2006
    Assignee: General Motors Corporation
    Inventor: Robert D Stephens
  • Patent number: 7142972
    Abstract: A method and system for detection of continuous single cylinder misfire, by more completely analyzing an estimated periodic sequence of reference period signals, and comparing the periodic sequence with a sample corresponding to an immediately prior revolution, is offered. Data occurring periodically, with a period of one revolution, are eliminated, whereas signals associated with a period of one engine cycle are enhanced. This comprises measuring a sequence of engine reference periods corresponding to a single engine revolution. Transient noise is removed. A first difference is calculated, and a disturbance sequence is estimated, correlatable to a single engine cycle. A difference is calculated and compared to a threshold. The threshold comprises an array of calibrated values, determined based upon engine operating speed and engine load.
    Type: Grant
    Filed: June 13, 2005
    Date of Patent: November 28, 2006
    Assignee: GM Global Technology Operations, Inc.
    Inventor: Sanjeev M. Naik
  • Patent number: 7140081
    Abstract: A releasable fastener system comprises a loop portion and a hook portion. The loop portion includes a support and a loop material disposed on one side thereof whereas the hook portion includes a support and a plurality of closely spaced upstanding hook elements extending from one side thereof. When the hook portion and loop portion are pressed together they interlock to form a releasable engagement. The resulting joint created by the engagement is relatively resistant to shear and pull forces and weak in peel strength forces. The hook elements are formed of a material or have configurations that provide a shape changing capability and/or change in flexural modulus property to the hook elements. In this manner, the shape and/or flexural modulus of the hook elements can be remotely changed to provide a reduction in the shear and/or pull forces.
    Type: Grant
    Filed: February 5, 2003
    Date of Patent: November 28, 2006
    Assignee: General Motors Corporation
    Inventors: Alan Lampe Browne, Nancy L. Johnson
  • Patent number: 7138066
    Abstract: A method of surface treating heat treated members to remove oxide scale. The heat treated members are subjected to a staged series of discrete chemical and physical cleaning steps yielding a substantially scale-free surface readily adaptable for subsequent application of protective coatings.
    Type: Grant
    Filed: July 13, 2005
    Date of Patent: November 21, 2006
    Assignee: GM Global Technology Operations, Inc.
    Inventors: Leonid C. Lev, Michael J. Lukitsch, Yang-Tse Cheng, Anita M. Weiner, Robert F. Paluch
  • Patent number: 7138598
    Abstract: A method of joining a pair of overlapping workpieces, the method includes: inserting a filler material between the pair of overlapping workpieces; applying a pressure to at least one of the workpieces so that the filler material is crushed; and joining the two workpieces together in a region defined by the filler material. A welded joint includes: a pair of overlapping workpieces; and a filler material that is made from a material whose comparability has been established by the American Welding Society, and the filler material is a porous material.
    Type: Grant
    Filed: December 1, 2003
    Date of Patent: November 21, 2006
    Assignee: General Motors Corporation
    Inventors: Robin Stevenson, Pei-Chung Wang
  • Patent number: 7136729
    Abstract: A supervisory diagnostics system and related method for providing vehicle diagnostics for an integrated vehicle stability system that monitors the state of health of sensors, actuators, vehicle sub-system and communication sub-systems that are used in the stability control system. The diagnostics system employs an algorithm to determine whether the various sensors, actuators and sub-systems are operating properly. The algorithm determines whether the components and sub-systems are outputting valid signals at a component level. The algorithm also determines whether a bias of the sensors is below a predetermined limit. The algorithm further determines whether a comparison between the outputs of redundant sensors is below a predetermined threshold for a predetermined period of time. The system also performs a state of health analytical comparison of all the system signals. The system will go in to a fail-safe mode if a fault is detected.
    Type: Grant
    Filed: July 26, 2004
    Date of Patent: November 14, 2006
    Assignee: General Motors Corporation
    Inventors: Mutasim A. Salman, Mark N. Howell
  • Patent number: 7135784
    Abstract: A belted-alternator starter system that continuously provides pre-flux when the vehicle ignition is on and the engine is off to provide a faster torque response when the engine is turned on. The alternator/starter device operates as an alternator for providing electrical energy to vehicle electrical devices and the battery when the ignition is on and the engine is running, and operates as a starter for providing engine torque to start the engine when the engine is off and the ignition is on. The system further includes an inverter/rectifier circuit to provide AC current to the armature coils when the alternator/starter device is operating as a starter. The system provides an operating field current to the field coil when the ignition and the engine are on and provides a pre-flux field current to the field coil when the vehicle ignition is on and the engine is off.
    Type: Grant
    Filed: July 26, 2004
    Date of Patent: November 14, 2006
    Assignee: General Motors Corporation
    Inventors: Balarama V. Murty, Chandra S. Namuduri
  • Patent number: 7132090
    Abstract: A process for selectively removing carbon dioxide from a gaseous stream by converting the carbon dioxide to a solid, stable form is provided. In a sequestration process, carbon dioxide enriched air is passed through a gas diffusion membrane to transfer the carbon dioxide to a fluid medium. The carbon dioxide rich fluid is then passed through a matrix containing a catalyst specific for carbon dioxide, which accelerates the conversion of the carbon dioxide to carbonic acid. In the final step, a mineral ion is added to the reaction so that a precipitate of carbonate salt is formed. This solid mineral precipitate can be safely stored for extended periods of time, such as by burying the precipitate in the ground or depositing the precipitate into storage sites either on land or into a body of water. An apparatus for removing carbon dioxide from a gaseous stream is also provided.
    Type: Grant
    Filed: May 2, 2003
    Date of Patent: November 7, 2006
    Assignee: General Motors Corporation
    Inventors: Daniel Dziedzic, Kenneth B Gross, Robert A Gorski, John T Johnson
  • Patent number: 7133755
    Abstract: A system and method for providing state of health monitoring and fault diagnostics for a vehicle stability system. The system includes at least one primary sensor and at least one secondary sensor for sensing the operation of at least one vehicle characteristic. The system calculates an estimated output of the primary sensor using at least one estimate model, and generates at least one residual as the difference between a measured output of the primary sensor and the estimated output of the estimate model. The system uses a residual pattern to determine if the primary sensor is faulty. The system compares the measured output of the primary sensor to a measured output of the secondary sensor if the residual is less than a threshold, and determines that the secondary sensor is faulty if the comparison between the measured outputs of the primary and secondary sensors is greater than a predetermined threshold.
    Type: Grant
    Filed: July 26, 2004
    Date of Patent: November 7, 2006
    Assignee: General Motors Corporation
    Inventors: Mutasim A. Salman, Mark N. Howell
  • Patent number: 7128047
    Abstract: Part load operating point for a controlled auto-ignition four-stroke internal combustion engine is reduced without compromising combustion stability through negative valve overlap control operative to retain and compress combusted gases within the combustion chamber into which fuel is introduced. Combustion chamber pressures and temperatures are increased as engine load decreases. Various split-injection fuel controls are implemented during low and intermediate part load operation whereas a single-injection fuel control is implemented during high part load operation. Split-injections are characterized by lean fuel/air ratios and single-injections are characterized by either lean or stoichiometric fuel/air ratios. Controlled autoignition is thereby enabled through an extended range of engine loads while maintaining acceptable combustion stability and emissions.
    Type: Grant
    Filed: July 26, 2004
    Date of Patent: October 31, 2006
    Assignee: General Motors Corporation
    Inventors: Tang-Wei Kuo, Barry L. Brown, Paul M. Najt, Thompson Milton Sloane, Hardo Barths
  • Patent number: 7128062
    Abstract: A method is disclosed for expanding the mid load range of a four-stroke gasoline direct-injection controlled auto-ignition combustion engine. The engine includes at least one cylinder containing a piston reciprocably connected with a crank and defining a variable volume combustion chamber including an intake valve controlling communication with an air intake and an exhaust valve controlling communication with an exhaust outlet. A system is employed for variably actuating the intake and exhaust valves. The valve actuating system is employable to operate the intake and exhaust valves with an exhaust re-compression or an exhaust re-breathing valve strategy. A reservoir chamber in communication with the combustion chamber is provided for temporary holding of residual burned gas. Residual burned gas in the combustion chamber and the exhaust outlet enters into the reservoir chamber and then loses thermal energy while in the reservoir chamber before being drawn back into the combustion chamber.
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: October 31, 2006
    Assignees: General Motors Corporation, University of Michigan
    Inventors: Tang-Wei Kuo, Paul M. Najt, James A. Eng, Junseok Chang, Zoran S. Filipi, Dionissios N. Assanis, Orgun A. Guralp
  • Patent number: 7128063
    Abstract: An exemplary method of controlling a gasoline engine operating unthrottled with homogeneous charge compression ignition (HCCI) combustion includes operating the engine with predetermined values of external EGR and internal EGR settings, and burned gas fraction set points for intake and exhaust gases. Repeated adjustments are made to the external EGR and internal EGR settings to move the exhaust and intake gases burned gas fractions toward their state set points. Effects of disturbances in actual operating conditions are thereby minimized.
    Type: Grant
    Filed: July 6, 2005
    Date of Patent: October 31, 2006
    Assignee: GM Global Technology Operations, Inc.
    Inventor: Jun-Mo Kang
  • Patent number: 7128684
    Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least eight forward torque ratios and one reverse speed ratio. The transmission family members include three planetary gear sets having seven torque-transmitting mechanisms, and two interconnecting members, one of which is grounded. The powertrain includes an engine that is selectively connectable to at least one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The seven torque-transmitting mechanisms provide interconnections between various gear members, the input shaft and the transmission housing, and are operated in combinations of three to establish at least eight forward torque ratios and at least one reverse speed ratio.
    Type: Grant
    Filed: November 1, 2004
    Date of Patent: October 31, 2006
    Assignee: General Motors Corporation
    Inventors: Madhusudan Raghavan, Norman K. Bucknor, Patrick B. Usoro
  • Patent number: 7130858
    Abstract: A system and method for electronically managing privileged and non-privileged documents in two independent schemas. One schema is a privileged schema for storing privileged documents and the other schema is a non-privileged schema for storing non-privileged documents. The two schemas are separate and distinct so that privileged and non-privileged documents are not commingled. Access to the privileged schema is restricted to privileged users while non-privileged users have access only to the non-privileged schema. As a result, privileged documents are protected against the inadvertent waiver of privilege.
    Type: Grant
    Filed: July 2, 2004
    Date of Patent: October 31, 2006
    Assignee: General Motors Corporation
    Inventors: Barbara L. Ciaramitaro, Michael A. Gruskin, Edward C. Wolfe
  • Patent number: 7130729
    Abstract: An active rear-wheel vehicle steering control system that employs both open-loop and closed-loop control, where the open-loop and closed-loop control include adaptive compensation sub-systems that compensate for changes in vehicle dynamic parameters. The control system includes a dynamic parameter estimation sub-system that provides an estimated front-wheel cornering compliance and rear-wheel cornering compliance based on a front-wheel steering angle signal, a rear-wheel steering angle signal, a vehicle lateral acceleration signal, a vehicle yaw rate signal and a vehicle speed signal. The closed-loop control includes active gain for each of vehicle yaw rate, vehicle yaw rate acceleration, side-slip velocity and side-slip velocity rate, all based on the vehicle speed and vehicle dynamic parameter changes.
    Type: Grant
    Filed: July 26, 2004
    Date of Patent: October 31, 2006
    Assignee: General Motors Corporation
    Inventors: Kwang-Keun Shin, Shih-Ken Chen
  • Patent number: 7124729
    Abstract: An engine part that contacts oil during engine operation has a coating layer that provides one or more oil additives into the oil during a desired period of engine use. The coating layer includes one or more oil additives that are incorporated into the oil over the period of engine use as well as a coating matrix that releases the additive(s), e.g. by dissolution or diffusion of the additive(s), into the oil over the desired period of engine use. The additives replenish the oil to maintain or improve oil performance over the period of engine use.
    Type: Grant
    Filed: February 2, 2004
    Date of Patent: October 24, 2006
    Assignee: General Motors Corporation
    Inventor: Frank Caracciolo
  • Patent number: 7126077
    Abstract: The formation of spot welds in high strength steel workpieces is improved by using welding electrodes with annular, or donut shaped welding tips for the formation of the molten metal weld pool at the weld site. The annular poll solidifies to form an annular weld nugget. Preferably the donut shaped nugget has an internal diameter that is no more than three-quarters of the outside diameter. The method is applicable to carbon steel workpieces with allowing elements for strengthening, and to thick sheets of mild carbon steels.
    Type: Grant
    Filed: May 10, 2004
    Date of Patent: October 24, 2006
    Assignee: General Motors Corporation
    Inventor: Pei-Chung Wang
  • Patent number: 7122107
    Abstract: A process is disclosed for stabilizing certain colored anodized coating on aluminum articles against degradation by ultraviolet radiation. Anodized articles colored by an electrolytic or interference process can thereafter be stabilized by heat treating them at temperatures of the order of 350° F. for a period of an hour or so. The process is particularly useful for use on electrolytically colored, anodized vehicular external body panels made from suitably formable sheet metal aluminum alloys.
    Type: Grant
    Filed: August 28, 2003
    Date of Patent: October 17, 2006
    Assignee: General Motors Corporation
    Inventors: Sheila Farrokhalaee Kia, Hong-Hsiang Kuo, Yar-Ming Wang
  • Patent number: 7121603
    Abstract: A sliding load floor assembly for a motor vehicle comprises a sliding platform configured to receive a load floor and slidable along a support frame fixed to the vehicle. The support frame includes upper and lower flanges. An axle extends outward from the sliding platform, with a roller rotatably attached thereto and movable along the upper and lower flanges. The roller configuration elevates the sliding platform above a vehicle floor, while allowing the sliding platform the move between a stowed position and an extended position. A wedge is configured to exert a vertical force upon a portion of the sliding platform in the stowed position, thereby preventing vertical movement of the roller to reduce vibration. At least one detent member and at least one latch member are selectively engageable with one another to restrict movement of the sliding platform with respect to the support rail.
    Type: Grant
    Filed: December 10, 2004
    Date of Patent: October 17, 2006
    Assignee: General Motors Corporation
    Inventors: Robin Stevenson, Devadatta M. Kulkarni, Andrew L. Bartos, Teresa U. Holiness
  • Patent number: 7118508
    Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least eight forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets having seven torque-transmitting mechanisms and two interconnecting members. The powertrain includes an engine that is selectively connectable to at least one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The seven torque-transmitting mechanisms provide interconnections between various gear members, the input shaft and the transmission housing, and are operated in combinations of three to establish at least eight forward speed ratios and at least one reverse speed ratio.
    Type: Grant
    Filed: July 28, 2004
    Date of Patent: October 10, 2006
    Assignee: General Motors Corporation
    Inventors: Patrick B. Usoro, Madhusudan Raghavan, Norman K. Bucknor