Patents by Inventor Aniket Kothari
Aniket Kothari 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).
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Publication number: 20180345973Abstract: A vehicle and method is provided. The vehicle includes systems and method for limiting the slip of the wheels. In an embodiment, the system holds the brakes based on an acceleration characteristic measured by a sensor. In another embodiment, the system includes a transmission controller that applies an adjustment to limit an amount of clutch slip as the clutch temperature to change in clutch performance to reduce wheel slip. In another embodiment, the system monitors wheel slip signal from a sensor and compares the wheel slip to a target slip value and controls clutch slip of the transmission clutch based to maintain engine output torque during acceleration. In another embodiment, in response to an anticipated vehicle launch event, a drive motor applies a first torque to the input shaft to adjust a gear lash of the differential unit.Type: ApplicationFiled: September 9, 2016Publication date: December 6, 2018Inventors: Eric E. Krueger, Alexander J. MacDonald, Michael G. Petrucci, Anthony J. Rifici, Ryan Z. Goode, Aniket Kothari, Jonathan P. Kish
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Patent number: 9731605Abstract: An electrified powertrain system for a vehicle includes an electric machine coupled to a driveline. An inverter controller communicates directly with an auxiliary power module. An ignition module indicates either a key-on state or a key-off state. When the ignition module is in a key-off state, a low-power DC/DC converter generates an output voltage originating on the high-voltage DC bus having a magnitude sufficient to activate the inverter controller. The inverter controller detects a key-off uncontrolled generator (UCG) mode. The inverter controller directly communicates detection of the key-off UCG mode to the auxiliary power module. The inverter controller controls the inverter. The auxiliary power module supplies electric power to operate low-voltage electrically-powered powertrain actuators.Type: GrantFiled: February 27, 2015Date of Patent: August 15, 2017Assignee: GM Global Technology Operations LLCInventors: Konking (Michael) Wang, Aniket Kothari, William T. Ivan, Steven V. Wybo, Ying Tan, Michael M. Gandham
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Patent number: 9527495Abstract: A vehicle system includes an electric motor, an internal combustion engine, and a heating system configured to transfer heat from the internal combustion engine to a passenger compartment of the vehicle. The system includes a controller configured to operate the electric motor and the internal combustion engine according to one of a plurality of drive cycle profiles. The controller selects the drive cycle profile based on an ambient temperature. The drive cycle profiles include a first drive cycle profile that commands power from the electric motor until the battery system reaches a predetermined state of charge and subsequently commands power from the internal combustion engine and a second drive cycle profile that commands power from the internal combustion engine and subsequently commands power from the electric motor.Type: GrantFiled: December 11, 2014Date of Patent: December 27, 2016Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Andrew M. Zettel, Norman J. Weigert, Mark A. Manickaraj, Anthony H. Heap, Richard A. Marsh, Aniket Kothari, Michael R. Colville
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Publication number: 20160250927Abstract: An electrified powertrain system for a vehicle includes an electric machine coupled to a driveline. An inverter controller communicates directly with an auxiliary power module. An ignition module indicates either a key-on state or a key-off state. When the ignition module is in a key-off state, a low-power DC/DC converter generates an output voltage originating on the high-voltage DC bus having a magnitude sufficient to activate the inverter controller. The inverter controller detects a key-off uncontrolled generator (UCG) mode. The inverter controller directly communicates detection of the key-off UCG mode to the auxiliary power module. The inverter controller controls the inverter. The auxiliary power module supplies electric power to operate low-voltage electrically-powered powertrain actuators.Type: ApplicationFiled: February 27, 2015Publication date: September 1, 2016Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Konking (Michael) Wang, Aniket Kothari, William T. Ivan, Steven V. Wybo, Ying Tan, Michael M. Gandham
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Publication number: 20160167640Abstract: A vehicle system includes an electric motor, an internal combustion engine, and a heating system configured to transfer heat from the internal combustion engine to a passenger compartment of the vehicle. The system includes a controller configured to operate the electric motor and the internal combustion engine according to one of a plurality of drive cycle profiles. The controller selects the drive cycle profile based on an ambient temperature. The drive cycle profiles include a first drive cycle profile that commands power from the electric motor until the battery system reaches a predetermined state of charge and subsequently commands power from the internal combustion engine and a second drive cycle profile that commands power from the internal combustion engine and subsequently commands power from the electric motor.Type: ApplicationFiled: December 11, 2014Publication date: June 16, 2016Inventors: ANDREW M. ZETTEL, NORMAN J. WEIGERT, MARK A. MANICKARAJ, ANTHONY H. HEAP, RICHARD A. MARSH, ANIKET KOTHARI, MICHAEL R. COLVILLE
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Patent number: 8918240Abstract: A method and system used to identify an optimal hybrid vehicle operating mode based on a variety of potential factors, and then recommend the optimal operating mode to the driver so that they can make an informed decision regarding their operating mode selection. In one embodiment, the method uses geographic-, vehicle- and/or environmental-related factors to establish one or more operating zones, monitors the location of the hybrid vehicle and determines when it is within one of the operating zones, and then determines an operating mode that is optimal for that particular operating zone.Type: GrantFiled: March 15, 2013Date of Patent: December 23, 2014Assignee: GM Global Technology Operations LLCInventors: Mark A. Manickaraj, Aniket Kothari, Richard A. Marsh, Lawrence P. Ziehr, Norman J. Weigert, Rick W. Szymczyk, Andrew M. Zettel, Danielle A. Cory
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Publication number: 20140277878Abstract: A method and system used to identify an optimal hybrid vehicle operating mode based on a variety of potential factors, and then recommend the optimal operating mode to the driver so that they can make an informed decision regarding their operating mode selection. In one embodiment, the method uses geographic-, vehicle- and/or environmental-related factors to establish one or more operating zones, monitors the location of the hybrid vehicle and determines when it is within one of the operating zones, and then determines an operating mode that is optimal for that particular operating zone.Type: ApplicationFiled: March 15, 2013Publication date: September 18, 2014Applicant: GM Global Technology Operations LLCInventors: Mark A. Manickaraj, Aniket Kothari, Richard A. Marsh, Lawrence P. Ziehr, Norman J. Weigert, Rick W. Szymczyk, Andrew M. Zettel, Danielle A. Cory
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Patent number: 8626367Abstract: An exemplary method for operating a hybrid vehicle in the event that there is a problem with an auxiliary power source, such as an internal combustion engine or a fuel cell. According to one embodiment, the method provides a power management scheme for a variety of situations where an auxiliary power source experiences a problem; this may include situations where an internal combustion engine runs out of fuel, where there is a mechanical or electrical malfunction, or any other instance where the auxiliary power source is unable to generate and/or provide electrical energy for the hybrid vehicle. The power management scheme conserves the vehicle's primary power source, which is typically a battery, in order to provide the hybrid vehicle with an extended driving range.Type: GrantFiled: February 24, 2010Date of Patent: January 7, 2014Assignee: GM Global Technology Operations LLCInventors: Eric E. Krueger, Christopher A. Kinser, William R. Cawthorne, Aniket Kothari
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Patent number: 8600605Abstract: A distributed on-board diagnostic (OBD) architecture for a control system of a vehicle includes a plurality of control modules that are in communication with one another and a designated master OBD control module that is one of the plurality of control modules. The master OBD control module performs functions that a remainder of the plurality of control modules are incapable of performing including at least one of arbitrating a malfunction indicator lamp (MIL) state, arbitrating and storing OBD freeze frame data and determining OBD status flags of the remainder of the plurality of control modules.Type: GrantFiled: September 13, 2006Date of Patent: December 3, 2013Assignees: Electronic Data Systems CorporationInventors: Daniel P. Grenn, Marek L. Wilmanowicz, Aniket Kothari, Leonard G. Wozniak, Rick H. Schroeder, Andrew M. Zettel, Peter E. Wu, Wei D. Wang, Michael J. Taljonick, Jayanthi Padmanabhan
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Patent number: 8500598Abstract: A powertrain includes an electro-mechanical transmission mechanically-operatively coupled to an internal combustion engine and first and second electric machines adapted to selectively transmit mechanical power to an output member. An apparatus for controlling the powertrain includes the first and second electric machines, a first electric machine cooling circuit directing a cooling hydraulic flow to the first electric machine, a second electric machine cooling circuit directing a cooling hydraulic flow to the second electric machine, a hydraulic control system receiving a hydraulic flow and selectively channeling the hydraulic flow to the first and second electric machine cooling circuits, and an active electric machine cooling control system monitoring temperatures of the first and second electric machines, monitoring operation of the hydraulic control system, and selectively controlling the hydraulic control system.Type: GrantFiled: March 29, 2012Date of Patent: August 6, 2013Assignees: GM Global Technology Operations LLC, Daimler AG, Chrysler Group LLC, Bayerische Motoren Werke AktiengesellschaftInventors: Aniket Kothari, Jy-Jen F. Sah, Ali K. Naqvi, William Joseph Gourlay
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Patent number: 8446113Abstract: Methods and systems for operating an inverter having a plurality of high switches and a plurality of low switches coupled to an electric motor are provided. An event indicative of deceleration of the electric motor is detected. The inverter is alternated between a first mode of operation and a second mode of operation during the deceleration of the electric motor. In the first mode of operation, each of the plurality of high switches is activated and each of the plurality of low switches is deactivated or each of the plurality of low switches is activated and each of the plurality of high switches is deactivated. In the second mode of operation, each of the plurality of high switches is deactivated and each of the plurality of low switches is deactivated.Type: GrantFiled: June 17, 2010Date of Patent: May 21, 2013Assignee: GM Global Technology Operations LLCInventors: Brian A Welchko, Konstantin S. Majarov, Silva Hiti, Steven E. Schulz, Aniket Kothari, Nicholas Kokotovich
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Patent number: 8265821Abstract: A method for determining a voltage level across an electrical circuit of a powertrain includes measuring a plurality of voltage levels and utilizing a comparison test between at least two voltage levels of the plurality of voltage levels to determine the circuit voltage level.Type: GrantFiled: October 16, 2008Date of Patent: September 11, 2012Assignees: GM Global Technology Operations LLC, Daimler AG, Chrysler Group LLC, Bayerische Motoren Werke AktiengesellschaftInventors: Wei D. Wang, William R. Cawthorne, Aniket Kothari, Nicholas Kokotovich, Wei Ren, Bo Zhang
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Patent number: 8248023Abstract: A method of externally charging a powertrain includes monitoring a voltage level of a first battery, determining when the monitored voltage level is below a first voltage threshold, and when the monitored voltage level is below the first voltage threshold, charging the first battery by supplying power from an external power source and increasing voltage of the power supplied by the external power source within the powertrain.Type: GrantFiled: October 20, 2008Date of Patent: August 21, 2012Assignees: GM Global Technology Operations LLC, Daimler AG, Chrysler Group LLC, Bayerische Motoren Werke AktiengesellschaftInventors: R. Travis Schwenke, Nicholas Kokotovich, Aniket Kothari, Mario V. Maiorana, Jr., William R. Cawthorne
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Publication number: 20120191283Abstract: A powertrain includes an electro-mechanical transmission mechanically-operatively coupled to an internal combustion engine and first and second electric machines adapted to selectively transmit mechanical power to an output member. An apparatus for controlling the powertrain includes the first and second electric machines, a first electric machine cooling circuit directing a cooling hydraulic flow to the first electric machine, a second electric machine cooling circuit directing a cooling hydraulic flow to the second electric machine, a hydraulic control system receiving a hydraulic flow and selectively channeling the hydraulic flow to the first and second electric machine cooling circuits, and an active electric machine cooling control system monitoring temperatures of the first and second electric machines, monitoring operation of the hydraulic control system, and selectively controlling the hydraulic control system.Type: ApplicationFiled: March 29, 2012Publication date: July 26, 2012Applicants: GM GLOBAL TECHNOLOGY OPERATIONS LLC, Bayerische Motoren Werke Aktiengesellschaft, Chrysler LLC, Daimler AGInventors: Aniket Kothari, Jy-Jen F. Sah, Ali K. Naqvi, William Joseph Gourlay
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Patent number: 8214120Abstract: A powertrain includes an electromechanical transmission operative to transmit torque between an input member and an electric machine and an output member to transmit tractive torque. The electric machine is electrically connected to an inverter device which is electrically connected to an energy storage device. A method for operating the powertrain includes detecting a shutdown event, commanding the transmission to neutral, commanding the electric machine to cease operating in a torque generating mode, and electrically disconnecting the energy storage device from the inverter device.Type: GrantFiled: October 28, 2008Date of Patent: July 3, 2012Assignees: GM Global Technology Operations LLC, Daimler AG, Chrysler Group LLC, Bayerische Motoren Werke AktiengesellschaftInventors: Aniket Kothari, Nicholas Kokotovich, Stephen T. West, James E. Tarchinski, Sean E Gleason, William R. Cawthorne
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Patent number: 8167773Abstract: A method for controlling a powertrain including an transmission coupled to an engine and an electric machine and a hydraulic control system providing hydraulic flow to a cooling circuit of the electric machine, wherein the transmission is adapted to selectively transmit mechanical power to an output member, includes monitoring a temperature of the electric machine, determining a cooling flow requirement for the cooling circuit based upon the temperature of the electric machine, comparing the cooling flow requirement to a threshold cooling flow, and requesting active electric machine cooling of the electric machine based upon the comparing.Type: GrantFiled: October 15, 2008Date of Patent: May 1, 2012Assignees: GM Global Technology Operations LLC, Daimler AG, Chrysler LLC, Bayerische Motoren Werke AktiengesellschaftInventors: Aniket Kothari, Jy-Jen F. Sah, Ali K Naqvi, William Joseph Gourlay
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Patent number: 8098041Abstract: A method of charging a powertrain includes detecting an external power source in electrical communication with the powertrain, establishing a virtual network between charging control module, and transferring charge from the external power source to the powertrain.Type: GrantFiled: October 16, 2008Date of Patent: January 17, 2012Assignees: GM Global Technology Operations LLC, Daimler AG, Chrysler LLC, Bayerische Motoren Werke AktiengesellshaftInventors: Nicholas Kokotovich, Aniket Kothari, Michael Bolton
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Publication number: 20110309777Abstract: Methods and systems for operating an inverter having a plurality of high switches and a plurality of low switches coupled to an electric motor are provided. An event indicative of deceleration of the electric motor is detected. The inverter is alternated between a first mode of operation and a second mode of operation during the deceleration of the electric motor. In the first mode of operation, each of the plurality of high switches is activated and each of the plurality of low switches is deactivated or each of the plurality of low switches is activated and each of the plurality of high switches is deactivated. In the second mode of operation, each of the plurality of high switches is deactivated and each of the plurality of low switches is deactivated.Type: ApplicationFiled: June 17, 2010Publication date: December 22, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Brian A. Welchko, Konstantin S. Majarov, Silva Hiti, Steven E. Schulz, Aniket Kothari, Nicholas Kokotovich
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Publication number: 20110208378Abstract: An exemplary method for operating a hybrid vehicle in the event that there is a problem with an auxiliary power source, such as an internal combustion engine or a fuel cell. According to one embodiment, the method provides a power management scheme for a variety of situations where an auxiliary power source experiences a problem; this may include situations where an internal combustion engine runs out of fuel, where there is a mechanical or electrical malfunction, or any other instance where the auxiliary power source is unable to generate and/or provide electrical energy for the hybrid vehicle. The power management scheme conserves the vehicle's primary power source, which is typically a battery, in order to provide the hybrid vehicle with an extended driving range.Type: ApplicationFiled: February 24, 2010Publication date: August 25, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Eric E. Krueger, Christopher A. Kinser, William R. Cawthorne, Aniket Kothari
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Patent number: 7556578Abstract: A method and an apparatus for controlling an electro-mechanical transmission selectively operative in a plurality of fixed gear modes and continuously variable modes is provided. The exemplary transmission comprises first and second electrical machines and a hydraulic circuit comprising a plurality of pressure control devices and flow management valves. The method comprises monitoring an operating temperature of the electrical machines. A cooling flow rate in the hydraulic circuit effective to reduce the operating temperature of the electrical machines is determined. Availability of active cooling for each of the electrical machines is determined. Hydraulic flow in the hydraulic circuit is selectively controlled.Type: GrantFiled: October 26, 2006Date of Patent: July 7, 2009Assignee: GM Global Technology Operations, Inc.Inventors: Jy-Jen F. Sah, Aniket Kothari, Bryan R. Snyder, Michael D. Foster