Patents by Inventor Sanjeev M. Naik

Sanjeev M. Naik 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: 11890954
    Abstract: A multi-function onboard charging module (OBCM) operable for charging a battery pack using a wide variety of offboard charging systems, such as to enable the OBCM to charge a battery pack using electrical power provided from different types of direct current (DC), single-phase alternating current (AC), and/or three-phase AC offboard charging systems.
    Type: Grant
    Filed: September 21, 2022
    Date of Patent: February 6, 2024
    Assignee: GM Global Technology Operations LLC
    Inventors: Minh-Khai Nguyen, Sanjeev M. Naik
  • Publication number: 20240022161
    Abstract: A variable current gate driver for a transistor includes a first current control device having a first controllable output current. The first current control device is electrically connected between a first bus and an activator of the transistor, and a second current control device having a second controllable output current. The second current control device is electrically connected between the activator of the transistor and a second bus. A controller is operatively connected to the first and second current control devices to control the first and second controllable output currents to control the first and second current control devices to control activation of the transistor via the activator. The controller is operative to control the first and second current control devices to control a slew rate of the transistor.
    Type: Application
    Filed: July 15, 2022
    Publication date: January 18, 2024
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Hong Nguyen, Michael Z. Pieszala, Yilun Luo, Khorshed Mohammed Alam, Sanjeev M. Naik, Benjamin S. Ngu
  • Patent number: 10087815
    Abstract: A system includes a temperature estimation module and a pump control module. The temperature estimation module estimates a temperature of coolant flowing through an engine. The temperature estimation module estimates a temperature of a cylinder wall in the engine based on the estimated coolant temperature and a measured coolant temperature. The pump control module controls a coolant pump to adjust an actual rate of coolant flow through the engine based on the estimated cylinder wall temperature.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: October 2, 2018
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Sanjeev M. Naik, Yue-Ming Chen, Irina N. Dmitrieva
  • Patent number: 9863332
    Abstract: A system according to the principles of the present disclosure includes a switching period module and at least one of a valve lift control module and a start-stop control module. The switching period module determines a switching period that elapses as a valve lift actuator of an engine switches between a first valve lift position and a second valve lift position that is different than the first lift position. The switching period begins when a measured position of the valve lift actuator corresponds to the first lift position and the switching period ends when the measured position of the valve lift actuator corresponds to the second lift position. The valve lift control module controls the valve lift actuator based on the switching period. The start-stop control module determines whether to automatically stop the engine based on the switching period.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: January 9, 2018
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Jason T. Davis, Melvin R. Terechenok, Jr., Scott McLane, Sanjeev M. Naik, Kurt Alfred Wellenkotter, Douglas R. Verner, Joseph J. Moon, Kevin Andrew Gady
  • Patent number: 9840962
    Abstract: A system including a target module determining a target temperature of coolant at an input of an engine for a maximum amount of fuel efficiency. A mode module disables closed loop control based on temperatures of coolant entering the engine and at an output of a radiator. An open loop module determines first and second temperatures of coolant at inputs of a coolant control valve that receive coolant from the radiator and a channel that bypasses the radiator. A ratio module determines a ratio based on the first and second temperatures and the temperatures of the coolant entering the engine and at the radiator output. A closed loop module generates a correction value based on the target temperature and the temperature of the coolant entering the engine. A position module adjusts the coolant control valve based on the ratio, the correction value and whether closed loop control is disabled.
    Type: Grant
    Filed: October 7, 2015
    Date of Patent: December 12, 2017
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Eugene V. Gonze, Yue-Ming Chen, Vijay Ramappan, Sanjeev M. Naik
  • Patent number: 9803573
    Abstract: An engine control system for a vehicle includes a target torque module that determines a target torque output of an engine based on at least one driver input. A target air per cylinder (APC) module determines a target APC for the engine based on the target torque. A target mass airflow (MAF) module determines a target MAF through a throttle valve of the engine based on the target APC, a number of activated cylinders of the engine, and a total number of cylinders of the engine. A throttle control module determines a target throttle opening based on the target MAF and controls opening of the throttle valve based on the target throttle opening.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: October 31, 2017
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Sanjeev M. Naik, Kevin Andrew Gady
  • Patent number: 9745889
    Abstract: A system according to the principles of the present disclosure includes a heat transfer rate module, a desired flow rate module, a flow rate adjustment module, and a pump control module. The heat transfer rate module determines a rate of heat transfer from an engine to coolant flowing through the engine based on a cylinder wall temperature and a measured coolant temperature. The desired flow rate module determines a desired rate of coolant flow through the engine based on the heat transfer rate. The flow rate adjustment module determines a coolant flow rate adjustment based on a desired coolant temperature and the measured coolant temperature. The pump control module controls a coolant pump to adjust an actual rate of coolant flow through the engine based on the desired coolant flow rate and the coolant flow rate adjustment.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: August 29, 2017
    Assignee: GM Global Technology Operations LLC
    Inventors: Sanjeev M. Naik, Yue-Ming Chen, Irina N. Dmitrieva
  • Patent number: 9719439
    Abstract: A system according to the principles of the present disclosure includes a cylinder activation module and a spark timing module. The cylinder activation module selectively deactivates and reactivates a cylinder of an engine based on a driver torque request. When the cylinder is deactivated, the spark timing module selectively increases an amount by which spark timing of at least one active cylinder of the engine is retarded based on noise and vibration generated by the engine when the cylinder is deactivated.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: August 1, 2017
    Assignee: GM Global Technology Operations LLC
    Inventors: Daniel G. Brennan, Sanjeev M. Naik
  • Patent number: 9669755
    Abstract: An active vision system includes an image capture device for capturing images in a region exterior of a vehicle and a headlamp control unit for controlling a vehicle headlamp beam for illuminating an environment exterior of a vehicle. The headlamp control unit is configured to selectively illuminate between making a path of travel of a road visible to a driver of the vehicle and making the region exterior of the vehicle visible for capturing images by the image capture device. The headlamp control unit utilizes a duty cycle for controlling a first cycle time that the headlamp beam illuminates the path of travel for making the road visible to the driver and for controlling a second cycle time that the headlamp beam makes the captured region visible for capturing images by the image capture device.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: June 6, 2017
    Assignee: GM Global Technology Operations LLC
    Inventors: Sanjeev M. Naik, Wende Zhang, Shuqing Zeng
  • Patent number: 9657670
    Abstract: A control system for an engine of a vehicle includes an adder module that determines a temperature sum based on a sum of a plurality of temperatures determined based on (i) a plurality of operating parameters of the vehicle and (ii) a plurality of predetermined values calibrated for determining an estimated temperature at a location within an exhaust system of the vehicle. A temperature difference module determines a temperature difference based on the temperature sum and a previous value of the temperature difference. An estimating module determines the estimated temperature at the location within the exhaust system based on the temperature difference and a reference temperature. An actuator control module selectively adjusts at least one engine actuator based on the estimated temperature.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: May 23, 2017
    Assignee: GM Global Technology Operations LLC
    Inventors: Zhijian James Wu, Sanjeev M. Naik, Joshua D. Cowgill, Martino Casetti
  • Patent number: 9652980
    Abstract: A method for detecting a clear path of travel for a vehicle utilizing analysis of a plurality of images generated by a camera device located upon the vehicle includes monitoring the images. The images are analyzed including determining a clear path upon which a potential road surface can be estimated from other portions of the images that do not indicate a potential road surface, and determining an image of a traffic infrastructure indication. The method further includes determining the content of the traffic infrastructure indication, modifying the clear path based upon the content of the traffic infrastructure indication, and utilizing the modified clear path in navigation of the vehicle.
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: May 16, 2017
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Wende Zhang, Sanjeev M. Naik
  • Patent number: 9644548
    Abstract: A control system for an engine of a vehicle includes an adder module that determines a pressure sum based on a sum of a plurality of pressures determined based on (i) a plurality of operating parameters of the vehicle and (ii) a plurality of predetermined values calibrated for determining an estimated pressure at a location within an exhaust system of the vehicle. An estimating module determines the estimated pressure at the location within the exhaust system based on the pressure sum and a reference pressure. An actuator control module selectively adjusts at least one engine actuator based on the estimated pressure.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: May 9, 2017
    Assignee: GM Global Technology Operations LLC
    Inventors: Zhijian James Wu, Sanjeev M. Naik, Joshua D. Cowgill, Martino Casetti
  • Publication number: 20170096957
    Abstract: A control system for an engine of a vehicle includes an adder module that determines a temperature sum based on a sum of a plurality of temperatures determined based on (i) a plurality of operating parameters of the vehicle and (ii) a plurality of predetermined values calibrated for determining an estimated temperature at a location within an exhaust system of the vehicle. A temperature difference module determines a temperature difference based on the temperature sum and a previous value of the temperature difference. An estimating module determines the estimated temperature at the location within the exhaust system based on the temperature difference and a reference temperature. An actuator control module selectively adjusts at least one engine actuator based on the estimated temperature.
    Type: Application
    Filed: October 2, 2015
    Publication date: April 6, 2017
    Inventors: Zhijian James WU, Sanjeev M. NAIK, Joshua D. COWGILL, Martino CASETTI
  • Publication number: 20170096950
    Abstract: A control system for an engine of a vehicle includes an adder module that determines a pressure sum based on a sum of a plurality of pressures determined based on (i) a plurality of operating parameters of the vehicle and (ii) a plurality of predetermined values calibrated for determining an estimated pressure at a location within an exhaust system of the vehicle. An estimating module determines the estimated pressure at the location within the exhaust system based on the pressure sum and a reference pressure. An actuator control module selectively adjusts at least one engine actuator based on the estimated pressure.
    Type: Application
    Filed: October 2, 2015
    Publication date: April 6, 2017
    Inventors: Zhijian James WU, Sanjeev M. NAIK, Joshua D. COWGILL, Martino CASETTI
  • Publication number: 20170002721
    Abstract: A system includes a temperature estimation module and a pump control module. The temperature estimation module estimates a temperature of coolant flowing through an engine. The temperature estimation module estimates a temperature of a cylinder wall in the engine based on the estimated coolant temperature and a measured coolant temperature. The pump control module controls a coolant pump to adjust an actual rate of coolant flow through the engine based on the estimated cylinder wall temperature.
    Type: Application
    Filed: July 2, 2015
    Publication date: January 5, 2017
    Inventors: Sanjeev M. NAIK, Yue-Ming CHEN, Irina N. DMITRIEVA
  • Publication number: 20170002720
    Abstract: A system according to the principles of the present disclosure includes a heat transfer rate module, a desired flow rate module, a flow rate adjustment module, and a pump control module. The heat transfer rate module determines a rate of heat transfer from an engine to coolant flowing through the engine based on a cylinder wall temperature and a measured coolant temperature. The desired flow rate module determines a desired rate of coolant flow through the engine based on the heat transfer rate. The flow rate adjustment module determines a coolant flow rate adjustment based on a desired coolant temperature and the measured coolant temperature. The pump control module controls a coolant pump to adjust an actual rate of coolant flow through the engine based on the desired coolant flow rate and the coolant flow rate adjustment.
    Type: Application
    Filed: July 2, 2015
    Publication date: January 5, 2017
    Inventors: Sanjeev M. NAIK, Yue-Ming CHEN, Irina N. DMITRIEVA
  • Publication number: 20160376978
    Abstract: A system including a target module determining a target temperature of coolant at an input of an engine for a maximum amount of fuel efficiency. A mode module disables closed loop control based on temperatures of coolant entering the engine and at an output of a radiator. An open loop module determines first and second temperatures of coolant at inputs of a coolant control valve that receive coolant from the radiator and a channel that bypasses the radiator. A ratio module determines a ratio based on the first and second temperatures and the temperatures of the coolant entering the engine and at the radiator output. A closed loop module generates a correction value based on the target temperature and the temperature of the coolant entering the engine. A position module adjusts the coolant control valve based on the ratio, the correction value and whether closed loop control is disabled.
    Type: Application
    Filed: October 7, 2015
    Publication date: December 29, 2016
    Inventors: Eugene V. GONZE, Yue-Ming CHEN, Vijay RAMAPPAN, Sanjeev M. NAIK
  • Publication number: 20160333803
    Abstract: A system according to the principles of the present disclosure includes a switching period module and at least one of a valve lift control module and a start-stop control module. The switching period module determines a switching period that elapses as a valve lift actuator of an engine switches between a first valve lift position and a second valve lift position that is different than the first lift position. The switching period begins when a measured position of the valve lift actuator corresponds to the first lift position and the switching period ends when the measured position of the valve lift actuator corresponds to the second lift position. The valve lift control module controls the valve lift actuator based on the switching period. The start-stop control module determines whether to automatically stop the engine based on the switching period.
    Type: Application
    Filed: May 12, 2015
    Publication date: November 17, 2016
    Inventors: Jason T. DAVIS, Melvin R. TERECHENOK, JR., Scott MCLANE, Sanjeev M. NAIK, Kurt Alfred WELLENKOTTER, Douglas R. VERNER, Joseph J. MOON, Kevin Andrew GADY
  • Patent number: 9458778
    Abstract: A ranking module determines N ranking values for N predetermined cylinder activation/deactivation sequences of an engine, respectively. N is an integer greater than or equal to two. A cylinder control module, based on the N ranking values, selects one of the N predetermined cylinder activation/deactivation sequences as a desired cylinder activation/deactivation sequence for cylinders of the engine. The cylinder control module also: activates opening of intake and exhaust valves of first ones of the cylinders that are to be activated based on the desired cylinder activation/deactivation sequence; and deactivates opening of intake and exhaust valves of second ones of the cylinders that are to be deactivated based on the desired cylinder activation/deactivation sequence. A fuel control module provides fuel to the first ones of the cylinders and disables fueling to the second ones of the cylinders.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: October 4, 2016
    Assignee: GM Global Technology Operations LLC
    Inventors: Allen B. Rayl, Randall S. Beikmann, Sanjeev M. Naik
  • Patent number: 9404397
    Abstract: A vehicle system includes a position sensor, a current supply module, and a mode indicator module. The position sensor includes: an electromagnet (EM) that generates a magnetic field proximate to one of an intake valve and an exhaust valve of an engine; and a Hall-effect sensor that generates a position signal indicating a position of the one of the intake valve and the exhaust valve based on the magnetic field. The current supply module supplies current to the EM. The mode indicator module indicates whether the one of the intake valve and the exhaust valve is being actuated in a low lift mode or a high lift mode based on the position signal.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: August 2, 2016
    Assignee: GM Global Technology Operations LLC
    Inventors: Douglas R. Verner, Sanjeev M. Naik, Donovan L. Dibble