Patents by Inventor Nadirsh Patel
Nadirsh Patel 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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Patent number: 11912135Abstract: A control system for an electrified powertrain of a battery electric vehicle (BEV) includes an accelerator pedal and a controller configured to determine maximum and minimum values for driver pedal position based on a first position of the accelerator pedal indicative of a first driver pedal position, determine whether the accelerator pedal position remains constant relative to the first position, when the accelerator pedal position does not remain constant and moves to a second position indicative of a second driver pedal position, detect that driver pedal position is increasing when the second driver pedal position is greater than the first minimum value and setting the first maximum value to the second driver pedal position and detect decreasing driver pedal position when the second driver pedal position is less than the first maximum value and setting the minimum value to the second driver pedal position.Type: GrantFiled: March 24, 2021Date of Patent: February 27, 2024Assignee: FCA US LLCInventors: Ashay Sharma, Nadirsh Patel, Achyut Venkataramu
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Publication number: 20240025407Abstract: Speed control techniques include, based on a set of target speed inputs indicative a target speed for an electric motor, determining a set of profiling inputs including (i) the target speed and (ii) a set of desired acceleration calibrations, performing jerk-based profiling based on the set of profiling inputs to determine at least one of an open-loop acceleration command and a profiled target speed, determining a closed-loop torque adjustment based on the profiled target speed and a measured speed of the electric motor, determining an electric motor torque command based on the open-loop acceleration command and the closed-loop torque adjustment, and controlling the electric motor based on the respective electric motor torque command to improve vehicle responsiveness in reaching the target speed.Type: ApplicationFiled: July 20, 2022Publication date: January 25, 2024Inventors: Zachary L. Tuller, Nadirsh Patel, Allwyn D. Bhakare, Naresh Sathyamoorthy, Andy M. Lee
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INTERNAL COMBUSTION ENGINE TORQUE OPTIMIZATION SUBJECT TO CONSTRAINTS IN HYBRID-ELECTRIC POWERTRAINS
Publication number: 20230150477Abstract: Hybrid-electric powertrain control systems and methods include a set of sensors configured to measure a set of operating parameters of a set of components of the hybrid-electric powertrain that are each a constraint on minimum/maximum motor torque limits for the electric motors thereby collectively forming a set of constraints and a controller configured to perform a linear optimization to find the best engine torque values that are attainable subject to a set of constraint inequalities as defined by current vehicle state and as monitored by the set of sensors, and control the hybrid-electric powertrain based on the best engine torque values to avoid excessive torque commands that could damage physical components of the hybrid-electric powertrain and/or could cause undesirable noise/vibration/harshness (NVH) characteristics.Type: ApplicationFiled: November 15, 2021Publication date: May 18, 2023Inventors: McKenzie T Walsh, Szabolcs Sovenyi, Nadirsh Patel -
Publication number: 20220305920Abstract: A control system for an electrified powertrain of a battery electric vehicle (BEV) includes an accelerator pedal and a controller configured to determine maximum and minimum values for driver pedal position based on a first position of the accelerator pedal indicative of a first driver pedal position, determine whether the accelerator pedal position remains constant relative to the first position, when the accelerator pedal position does not remain constant and moves to a second position indicative of a second driver pedal position, detect that driver pedal position is increasing when the second driver pedal position is greater than the first minimum value and setting the first maximum value to the second driver pedal position and detect decreasing driver pedal position when the second driver pedal position is less than the first maximum value and setting the minimum value to the second driver pedal position.Type: ApplicationFiled: March 24, 2021Publication date: September 29, 2022Inventors: Ashay Sharma, Nadirsh Patel, Achyut Venkataramu
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Patent number: 11447017Abstract: An electrical regeneration and vehicle deceleration control method includes operating an electrified powertrain in normal or maximum regeneration modes associated with lesser and greater electrical regeneration and vehicle deceleration rates, respectively, receiving an input from a driver of the vehicle indicative of a request to enable the maximum regeneration mode, detecting a status indicative of an availability of the maximum regeneration mode, and in response to receiving the request and based on the status of the maximum regeneration mode and a current vehicle deceleration rate: (i) operating the electrified powertrain in either the maximum regeneration mode or a normal regeneration mode, (ii) selectively outputting a message to the driver indicative of the status of the maximum regeneration mode, and (iii) selectively commanding a hydraulic brake system of the vehicle to generate brake force based on a driver-expected vehicle deceleration rate associated with the operative regeneration mode.Type: GrantFiled: January 30, 2020Date of Patent: September 20, 2022Assignee: FCA US LLCInventors: Nadirsh Patel, James R Hollowell, Divya E Gorecki, Chandan Lakshmanaiah, Zachary C Rogalski, Richard Roy
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Publication number: 20210237582Abstract: An electrical regeneration and vehicle deceleration control method comprises operating an electrified powertrain in normal or maximum regeneration modes associated with lesser and greater electrical regeneration and vehicle deceleration rates, respectively, receiving an input from a driver of the vehicle indicative of a request to enable the maximum regeneration mode, detecting a status indicative of an availability of the maximum regeneration mode, and in response to receiving the request and based on the status of the maximum regeneration mode and a current vehicle deceleration rate: (i) operating the electrified powertrain in either the maximum regeneration mode or a normal regeneration mode, (ii) selectively outputting a message to the driver indicative of the status of the maximum regeneration mode, and (iii) selectively commanding a hydraulic brake system of the vehicle to generate brake force based on a driver-expected vehicle deceleration rate associated with the operative regeneration mode.Type: ApplicationFiled: January 30, 2020Publication date: August 5, 2021Inventors: Nadirsh Patel, James R. Hollowell, Divya E. Gorecki, Chandan Lakshmanaiah, Zachary C. Rogalski, Richard Roy
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Patent number: 10899351Abstract: A hybrid powertrain includes a torque provider, an automatic transmission without a torque converter, and a transfer case configured for providing four wheel drive low range. A controller receives a signal indicative of the transfer case being in low range and determines if brake pedal torque is indicative of a brake pedal being released and, if so, commands engagement of a launch clutch of the transmission up to maximum creep torque capacity at a predetermined maximum gradient. The controller determines when torque provider speed is synchronized with vehicle creep speed, and upon such determination, controls the launch clutch to fully engage to a lock up state to mimic behavior of engagement of a manual transmission gear when the hybrid powertrain is in low range to thereby substantially eliminate a time lag associated with automatic transmissions having a torque converter or a constantly slipping launch clutch.Type: GrantFiled: November 14, 2018Date of Patent: January 26, 2021Assignee: FCA US LLCInventors: Robert S Smyczynski, Nadirsh Patel, Stefan Senft
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Publication number: 20190152480Abstract: A hybrid powertrain includes a torque provider, an automatic transmission without a torque converter, and a transfer case configured for providing four wheel drive low range. A controller receives a signal indicative of the transfer case being in low range and determines if brake pedal torque is indicative of a brake pedal being released and, if so, commands engagement of a launch clutch of the transmission up to maximum creep torque capacity at a predetermined maximum gradient. The controller determines when torque provider speed is synchronized with vehicle creep speed, and upon such determination, controls the launch clutch to fully engage to a lock up state to mimic behavior of engagement of a manual transmission gear when the hybrid powertrain is in low range to thereby substantially eliminate a time lag associated with automatic transmissions having a torque converter or a constantly slipping launch clutch.Type: ApplicationFiled: November 14, 2018Publication date: May 23, 2019Inventors: Robert S. Smyczynski, Nadirsh Patel, Stefan Senft
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Patent number: 8972085Abstract: A mode selection control system and method for controlling an electrically variable transmission. The system and method calculate respective costs for operating the vehicle in a plurality of operating modes based on a battery discharge penalty and the costs associated with operating the electrical and mechanical portions of the transmission. The method selects an operating mode having the lowest calculated cost.Type: GrantFiled: June 25, 2012Date of Patent: March 3, 2015Assignee: Chrysler Group LLCInventors: Ashish Krupadanam, Nadirsh Patel, Goro Tamai
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Patent number: 8905167Abstract: A system and method of controlling first and second electric motors of a vehicle having an electrically variable transmission during an engine start/stop operation. The system and method determine an input speed profile and an input acceleration profile based on an optimum engine speed, determine a requested output torque based on a plurality of torque limits and a desired output torque, determine first and second feedforward motor torques based on a requested output torque and the input speed and input acceleration profiles, determine first and second feedback motor torques based on a difference between the input speed profile and an actual input speed, and using the feedforward and feedback first and second motor torques to control the operation of the first and second electric motors when an engine is being turned on or off.Type: GrantFiled: July 12, 2012Date of Patent: December 9, 2014Assignee: Chrysler Group LLCInventors: Jing Zhou, Goro Tamai, Feisel Weslati, Nadirsh Patel, Ashish Krupadanam
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Patent number: 8897941Abstract: A motor operation control system and method for controlling first and second electric motors of an electrically variable transmission. The system and method determine a minimum battery power associated with a torque of the second electric motor, set the torque of the second electric motor based on the determined minimum battery power, and set a torque of the first electric motor based on the determined minimum battery power.Type: GrantFiled: July 10, 2012Date of Patent: November 25, 2014Assignee: Chrysler Group LLCInventors: Nadirsh Patel, Goro Tamai, Ashish Krupadanam
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Patent number: 8849489Abstract: A system and method of controlling first and second electric motors of a vehicle having an electrically variable transmission during an engine start/stop operation. The system and method determine a type of shift being performed, determine if a first clutch is being applied or released during the shift, determine if a second clutch is being applied or released during the shift, determine an acceleration limit based on the shift being performed and which clutch is being applied and/or released, determine acceleration and speed profiles based on the shift being performed, which clutch is being applied and/or released and the acceleration limit, determine a first electric motor torque and a second electric motor torque based on the acceleration and speed profiles, and set the torques of the first and second electric motors to the determined first and second electric motor torques.Type: GrantFiled: June 25, 2012Date of Patent: September 30, 2014Assignee: Chrysler Group LLCInventors: Nadirsh Patel, Ashish Krupadanam, Goro Tamai, Mengyang Zhang
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Publication number: 20130080038Abstract: A system and method of controlling first and second electric motors of a vehicle having an electrically variable transmission during an engine start/stop operation. The system and method determine an input speed profile and an input acceleration profile based on an optimum engine speed, determine a requested output torque based on a plurality of torque limits and a desired output torque, determine first and second feedforward motor torques based on a requested output torque and the input speed and input acceleration profiles, determine first and second feedback motor torques based on a difference between the input speed profile and an actual input speed, and using the feedforward and feedback first and second motor torques to control the operation of the first and second electric motors when an engine is being turned on or off.Type: ApplicationFiled: July 12, 2012Publication date: March 28, 2013Applicant: CHRYSLER GROUP LLCInventors: Jing Zhou, Goro Tamai, Feisel Weslati, Nadirsh Patel, Ashish Krupadanam
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Publication number: 20130030626Abstract: A system and method of controlling first and second electric motors of a vehicle having an electrically variable transmission during an engine start/stop operation. The system and method determine a type of shift being performed, determine if a first clutch is being applied or released during the shift, determine if a second clutch is being applied or released during the shift, determine an acceleration limit based on the shift being performed and which clutch is being applied and/or released, determine acceleration and speed profiles based on the shift being performed, which clutch is being applied and/or released and the acceleration limit, determine a first electric motor torque and a second electric motor torque based on the acceleration and speed profiles, and set the torques of the first and second electric motors to the determined first and second electric motor torques.Type: ApplicationFiled: June 25, 2012Publication date: January 31, 2013Applicant: CHRYSLER GROUP LLCInventors: Nadirsh Patel, Ashish Krupadanam, Goro Tamai, Mengyang Zhang
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Publication number: 20130030628Abstract: A motor operation control system and method for controlling first and second electric motors of an electrically variable transmission. The system and method determine a minimum battery power associated with a torque of the second electric motor, set the torque of the second electric motor based on the determined minimum battery power, and set a torque of the first electric motor based on the determined minimum battery power.Type: ApplicationFiled: July 10, 2012Publication date: January 31, 2013Applicant: CHRYSLER GROUP LLCInventors: Nadirsh Patel, Goro Tamai, Ashish Krupadanam
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Publication number: 20130030627Abstract: A mode selection control system and method for controlling an electrically variable transmission. The system and method calculate respective costs for operating the vehicle in a plurality of operating modes based on a battery discharge penalty and the costs associated with operating the electrical and mechanical portions of the transmission. The method selects an operating mode having the lowest calculated cost.Type: ApplicationFiled: June 25, 2012Publication date: January 31, 2013Applicant: Chrysler Group LLCInventors: Ashish Krupadanam, Nadirsh Patel, Goro Tamai