Patents by Inventor Asim Tewari

Asim Tewari has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9186963
    Abstract: A method of reducing glare may include sensing a first light source with a second vehicle, and sensing a second light source with a first vehicle and oscillating a first light source ICF between a substantially opaque state and a substantially clear state on a first schedule. A second windscreen ICF may be oscillating between the substantially opaque state and the substantially clear state on a second schedule different from the first schedule. A position of the light source may be sensed and an eye position of the occupant estimated. An intersecting region of the selectively-darkenable ICF, which is located substantially along a line from the position of the light source to the eye position, is calculated. The intersecting region of the ICF is darkened, such that a reduced amount of light from the light source passes through the intersecting region.
    Type: Grant
    Filed: January 13, 2014
    Date of Patent: November 17, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Asim Tewari, Rohit Gupta, Chandra S. Namuduri
  • Publication number: 20140153076
    Abstract: A method of reducing glare may include sensing a first light source with a second vehicle, and sensing a second light source with a first vehicle and oscillating a first light source ICF between a substantially opaque state and a substantially clear state on a first schedule. A second windscreen ICF may be oscillating between the substantially opaque state and the substantially clear state on a second schedule different from the first schedule. A position of the light source may be sensed and an eye position of the occupant estimated. An intersecting region of the selectively-darkenable ICF, which is located substantially along a line from the position of the light source to the eye position, is calculated. The intersecting region of the ICF is darkened, such that a reduced amount of light from the light source passes through the intersecting region.
    Type: Application
    Filed: January 13, 2014
    Publication date: June 5, 2014
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Asim Tewari, Rohit Gupta, Chandra S. Namuduri
  • Patent number: 8645419
    Abstract: A method is provided for enhancing service diagnostics for root cause analysis of an identified problem in a vehicle. Service repair data of previously serviced vehicles is obtained from a memory storage device. The service data is compiled based on a service repair history for each vehicle. Each vehicle within the compiled service data having at least two service repairs performed within a predetermined period of time is identified. Combinations of parts serviced during each service repair are identified. A count is determined that indicates the number of times each combination appears in the compiled service data. The combinations having counts greater than a predetermined threshold are identified. A determination is made whether any of the combinations having counts greater than the predetermined threshold are present in the structural taxonomy database.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: February 4, 2014
    Assignee: GM Global Technology-Operations LLC
    Inventors: Asim Tewari, Vineet R Khare, Sugato Chakrabarty
  • Patent number: 8591674
    Abstract: A method of enhancing the ductility of magnesium alloy sheets containing 85% or more by weight of magnesium is described. An annealed, substantially strain free, sheet of generally uniform grain size is locally deformed in local regions to develop strained ‘islands’ of a predetermined strain embedded in a substantially strain-free matrix and then annealed. The deformed regions undergo recrystallization and grain growth while the remainder of the sheet suffers only minor change in grain size, leading to sheet with grains having a bimodal size distribution. The ductility of alloys processed in this way is significantly greater than the ductility of the unprocessed, uniform grain size alloy without compromise to the tensile strength of the alloy.
    Type: Grant
    Filed: November 11, 2011
    Date of Patent: November 26, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Sushil Kumar Mishra, Shashank Tiwari, Asim Tewari, Jon T. Carter, Deepika Sachdeva
  • Patent number: 8466696
    Abstract: A system may be used to detect corrosion between a first metal and a second metal, where the second metal is positioned adjacent to the first metal. The system may include a processor electrically coupled to each of the first and the second metals and configured to monitor a complex impedance between the first metal and the second metal, where the complex impedance may include a real component and an imaginary component. The processor may compare the real component of the complex impedance to a first threshold, compare the imaginary component of the complex impedance to a second threshold, and indicate a likelihood of corrosion if at least one of the real and imaginary components are below their respective threshold.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: June 18, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Asim Tewari, Deepika Sachdeva, Kiran Deshpande, Arun M. Kumar, Pulak Bandyopadhyay, Jon T. Carter
  • Publication number: 20130118657
    Abstract: A method of enhancing the ductility of magnesium alloy sheets containing 85% or more by weight of magnesium is described. An annealed, substantially strain free, sheet of generally uniform grain size is locally deformed in local regions to develop strained ‘islands’ of a predetermined strain embedded in a substantially strain-free matrix and then annealed. The deformed regions undergo recrystallization and grain growth while the remainder of the sheet suffers only minor change in grain size, leading to sheet with grains having a bimodal size distribution. The ductility of alloys processed in this way is significantly greater than the ductility of the unprocessed, uniform grain size alloy without compromise to the tensile strength of the alloy.
    Type: Application
    Filed: November 11, 2011
    Publication date: May 16, 2013
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Sushil Kumar Mishra, Shashank Tiwari, Asim Tewari, Jon T. Carter, Deepika Sachdeva
  • Patent number: 8387372
    Abstract: A device for filtering particulates from an exhaust gas feedstream of an internal combustion engine includes a filter substrate having a multiplicity of alternately closed parallel flow passages having porous walls oriented parallel to a flow axis of the exhaust gas between an inlet and an outlet thereof, wherein subsets of the flow passages are associated with respective ones of a plurality of zones, a flow control valve to control flow of exhaust gas to each of the plurality of zones, a multi-zone heating element including a plurality of individually activated heating elements each corresponding to one of the plurality of zones.
    Type: Grant
    Filed: March 11, 2010
    Date of Patent: March 5, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Asim Tewari, Garima Bhatia
  • Patent number: 8347612
    Abstract: A method for regenerating a particulate filter configured to treat engine exhaust gas in a vehicle equipped with an on-board navigation and an extra-vehicle communications system includes monitoring present operation of the vehicle, projecting vehicle operating conditions based upon information from the on-board navigation and the extra-vehicle communications system, monitoring a storage capacity of the particulate filter, executing a control scheme to regenerate the particulate filter when the storage capacity of the particulate filter exceeds an upper threshold, executing the control scheme to regenerate the particulate filter when the storage capacity of the particulate filter is less than the upper threshold and in response to an operator request to regenerate the particulate filter, and executing the engine control scheme to regenerate the particulate filter when the storage capacity of the particulate filter is less than the upper threshold and the projected vehicle operating conditions indicate an oppo
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: January 8, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Asim Tewari, Garima Bhatia
  • Patent number: 8350722
    Abstract: A method is disclosed for estimating the exposure of vehicle occupants to environmental conditions capable of inducing a least discomfort. The occupants are alerted to their proximity to a zone where environmentally-challenging conditions exist and, in a first embodiment, the details of the environmental condition and the estimated duration of any exposure is communicated to the occupants; in a second embodiment a suggested course of action by which the occupants may mitigate the effect of the environmental occurrence is communicated; and in a third embodiment the proposed course of action is automatically executed subject to override by the occupants.
    Type: Grant
    Filed: October 9, 2009
    Date of Patent: January 8, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Asim Tewari, Anil K. Sachdev
  • Publication number: 20120303662
    Abstract: A method is provided for enhancing service diagnostics for root cause analysis of an identified problem in a vehicle. Service repair data of previously serviced vehicles is obtained from a memory storage device. The service data is compiled based on a service repair history for each vehicle. Each vehicle within the compiled service data having at least two service repairs performed within a predetermined period of time is identified. Combinations of parts serviced during each service repair are identified. A count is determined that indicates the number of times each combination appears in the compiled service data. The combinations having counts greater than a predetermined threshold are identified. A determination is made whether any of the combinations having counts greater than the predetermined threshold are present in the structural taxonomy database.
    Type: Application
    Filed: May 24, 2011
    Publication date: November 29, 2012
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Asim Tewari, Vineet R. Khare, Sugato Chakrabarty
  • Publication number: 20120247975
    Abstract: A system may be used to detect corrosion between a first metal and a second metal, where the second metal is positioned adjacent to the first metal. The system may include a processor electrically coupled to each of the first and the second metals and configured to monitor a complex impedance between the first metal and the second metal, where the complex impedance may include a real component and an imaginary component. The processor may compare the real component of the complex impedance to a first threshold, compare the imaginary component of the complex impedance to a second threshold, and indicate a likelihood of corrosion if at least one of the real and imaginary components are below their respective threshold.
    Type: Application
    Filed: March 30, 2011
    Publication date: October 4, 2012
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Asim Tewari, Deepika Sachdeva, Kiran Deshpande, Arun M. Kumar, Pulak Bandyopadhyay, Jon T. Carter
  • Publication number: 20120126099
    Abstract: A method of reducing glare may include sensing a first light source with a second vehicle, and sensing a second light source with a first vehicle and oscillating a first light source ICF between a substantially opaque state and a substantially clear state on a first schedule. A second windscreen ICF may be oscillating between the substantially opaque state and the substantially clear state on a second schedule different from the first schedule. A position of the light source may be sensed and an eye position of the occupant estimated. An intersecting region of the selectively-darkenable ICF, which is located substantially along a line from the position of the light source to the eye position, is calculated. The intersecting region of the ICF is darkened, such that a reduced amount of light from the light source passes through the intersecting region.
    Type: Application
    Filed: November 22, 2010
    Publication date: May 24, 2012
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Asim Tewari, Rohit Gupta, Chandra S. Namuduri
  • Patent number: 8176884
    Abstract: Systems and methods of operation for internal combustion engines which employ molecular sieve technology to provide enhanced oxygen content in the air-fuel mixture during operation.
    Type: Grant
    Filed: May 16, 2008
    Date of Patent: May 15, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Asim Tewari, Karthik Ramanathan, Anil K. Sachdev
  • Publication number: 20110225949
    Abstract: A method for regenerating a particulate filter configured to treat engine exhaust gas in a vehicle equipped with an on-board navigation and an extra-vehicle communications system includes monitoring present operation of the vehicle, projecting vehicle operating conditions based upon information from the on-board navigation and the extra-vehicle communications system, monitoring a storage capacity of the particulate filter, executing a control scheme to regenerate the particulate filter when the storage capacity of the particulate filter exceeds an upper threshold, executing the control scheme to regenerate the particulate filter when the storage capacity of the particulate filter is less than the upper threshold and in response to an operator request to regenerate the particulate filter, and executing the engine control scheme to regenerate the particulate filter when the storage capacity of the particulate filter is less than the upper threshold and the projected vehicle operating conditions indicate an oppo
    Type: Application
    Filed: March 19, 2010
    Publication date: September 22, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Asim Tewari, Garima Bhatia
  • Publication number: 20110219753
    Abstract: A device for filtering particulates from an exhaust gas feedstream of an internal combustion engine includes a filter substrate having a multiplicity of alternately closed parallel flow passages having porous walls oriented parallel to a flow axis of the exhaust gas between an inlet and an outlet thereof, wherein subsets of the flow passages are associated with respective ones of a plurality of zones, a flow control valve to control flow of exhaust gas to each of the plurality of zones, a multi-zone heating element including a plurality of individually activated heating elements each corresponding to one of the plurality of zones.
    Type: Application
    Filed: March 11, 2010
    Publication date: September 15, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Asim Tewari, Garima Bhatia
  • Publication number: 20110084824
    Abstract: A method is disclosed for estimating the exposure of vehicle occupants to environmental conditions capable of inducing a least discomfort. The occupants are alerted to their proximity to a zone where environmentally-challenging conditions exist and, in a first embodiment, the details of the environmental condition and the estimated duration of any exposure is communicated to the occupants; in a second embodiment a suggested course of action by which the occupants may mitigate the effect of the environmental occurrence is communicated; and in a third embodiment the proposed course of action is automatically executed subject to override by the occupants.
    Type: Application
    Filed: October 9, 2009
    Publication date: April 14, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Asim Tewari, Anil K. Sachdev
  • Patent number: 7834751
    Abstract: A method for controlling the brake lights of a vehicle includes determining vehicle deceleration potential and modulating brake light activation based upon the vehicle deceleration potential, the modulating comprising changing at least one of brake light intensity and flashing of the brake lights.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: November 16, 2010
    Assignee: GM Global Technology Operations, Inc.
    Inventor: Asim Tewari
  • Patent number: 7774925
    Abstract: A method is provided for filling a hollow structure with metal foam. A mixture is made of a metal powder and a foaming agent. An electric resistance heating wire is provided and the mixture is consolidated into a solid preformed charge with the wire embedded in the charge and extending from the ends thereof. The preformed charge is placed into the hollow structure and electric current is applied to the resistance heating wire so that the metal powder is melted and the foaming agent foams the melted metal to fill the hollow structure.
    Type: Grant
    Filed: October 19, 2006
    Date of Patent: August 17, 2010
    Assignee: GM Global Technology Operations, Inc.
    Inventors: Asim Tewari, Anil K. Sachdev, Srinivas Subbarao
  • Publication number: 20090283059
    Abstract: Systems and methods of operation for internal combustion engines which employ molecular sieve technology to provide enhanced oxygen content in the air-fuel mixture during operation.
    Type: Application
    Filed: May 16, 2008
    Publication date: November 19, 2009
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Asim Tewari, Karthik Ramanathan, Anil K. Sachdev
  • Publication number: 20080238648
    Abstract: A method for controlling the brake lights of a vehicle includes determining vehicle deceleration potential and modulating brake light activation based upon the vehicle deceleration potential, the modulating comprising changing at least one of brake light intensity and flashing of the brake lights.
    Type: Application
    Filed: March 19, 2008
    Publication date: October 2, 2008
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventor: Asim Tewari