Patents by Inventor Rajit Johri

Rajit Johri 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).

  • Publication number: 20200108816
    Abstract: A vehicle includes an electric machine and a controller. The controller is programmed to responsive to a threshold difference, indicative of wheel slip, between average wheel speed and a vehicle speed that is based on a difference between wheel acceleration and measured vehicle acceleration, command a speed to the electric machine to reduce the wheel slip.
    Type: Application
    Filed: October 9, 2018
    Publication date: April 9, 2020
    Inventors: Jose VELAZQUEZ ALCANTAR, Joseph Jay TORRES, Peter James BARRETTE, Richard David BRUNS, Corwin STOUT, Rajit JOHRI
  • Publication number: 20200079373
    Abstract: Methods and systems for operating a driveline that includes one or more electric machine providing torque to one or more axles are described. In one example, a requested vehicle speed is adjusted responsive to at least one of vehicle yaw, vehicle roll, and vehicle pitch so that vehicle speed may be maintained at a requested value.
    Type: Application
    Filed: September 11, 2018
    Publication date: March 12, 2020
    Inventors: Walter Joseph Ortmann, Rajit Johri, Kevin Ray Ruybal, Jose Velazquez Alcantar
  • Publication number: 20200079353
    Abstract: Methods and systems are provided for improving engine restart operations occurring during a transmission shift in a hybrid vehicle. Engine speed is controller during cranking and run-up to approach a transmission input shaft speed that is based on the future gear of the transmission shift. Engine speed is controlled via adjustments to spark, throttle, and/or fuel, to expedite engine speed reaching the synchronous speed.
    Type: Application
    Filed: November 11, 2019
    Publication date: March 12, 2020
    Inventors: Mark Steven Yamazaki, Jeffrey Allen Doering, Wei Liang, Rajit Johri, Xiaoyong Wang, Ming Lang Kuang, Scott Thompson, David Oshinsky, Dennis Reed, Adam Banker
  • Publication number: 20200070809
    Abstract: One axle of a hybrid vehicle is powered by an electric motor while a second axle of the vehicle is powered by a powertrain that includes an internal combustion engine. The electrically driven axle can be controlled in a speed control mode or in a torque control mode based on a driver demanded torque. The speed control mode is used when slip is detected at the electrically driven axle. The torque control mode is used when the electrically driven axle has traction. During a transition between these modes, the rate of change of torque is controlled to a predetermined level to mitigate noise, vibration, and harshness.
    Type: Application
    Filed: August 30, 2018
    Publication date: March 5, 2020
    Inventors: Jose Velazquez Alcantar, Joe Jay Torres, Peter James Barrette, Richard David Bruns, Corwin Stout, Rajit Johri
  • Patent number: 10569758
    Abstract: A method of controlling a hybrid vehicle includes commanding a first electric machine to provide a compensating torque. The compensating torque is based on a calculated cylinder pressure. The calculated cylinder pressure is calculated using a dynamic model. The model has an initializing input of engine crank position and real-time inputs of measured speed of the first electric machine and measured speed of the second electric machine.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: February 25, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Jose Velazquez Alcantar, Rajit Johri, Ming Lang Kuang
  • Patent number: 10543832
    Abstract: Methods and systems are provided for improving engine restart operations occurring during a transmission shift in a hybrid vehicle. Engine speed is controller during cranking and run-up to approach a transmission input shaft speed that is based on the future gear of the transmission shift. Engine speed is controlled via adjustments to spark, throttle, and/or fuel, to expedite engine speed reaching the synchronous speed.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: January 28, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Mark Steven Yamazaki, Jeffrey Allen Doering, Wei Liang, Rajit Johri, Xiaoyong Wang, Ming Lang Kuang, Scott Thompson, David Oshinsky, Dennis Reed, Adam Banker
  • Patent number: 10518775
    Abstract: A vehicle includes primary and secondary axles including primary and secondary electric machines, respectively. A vehicle controller is programmed to, responsive to a braking torque request, command regenerative torques, that are a proportion of the braking torque request, to the electric machines such that the proportion commanded to the secondary electric machine decreases responsive to lateral acceleration of the vehicle increasing.
    Type: Grant
    Filed: September 13, 2018
    Date of Patent: December 31, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Jose Velazquez Alcantar, Corwin Stout, Rajit Johri, Joseph Jay Torres
  • Publication number: 20190367007
    Abstract: A vehicle including an engine, an electric machine, a traction battery, and a controller is provided. The controller is programmed to, during acceleration or constant speed travel of the vehicle and responsive to state of charge of the battery falling below a first threshold, run the engine to charge the battery. The controller is further programmed to, during the running and responsive to first occurrence of the state of charge achieving a second threshold, accelerator pedal release, or braking of the vehicle, stop the engine. The controller may be further programmed to, during accelerator pedal release or braking of the vehicle and responsive to the state of charge falling below the first threshold, inhibit start of the engine. The controller may be further programmed to, during the inhibiting and responsive to acceleration or constant speed travel of the vehicle, run the engine to charge the battery.
    Type: Application
    Filed: June 4, 2018
    Publication date: December 5, 2019
    Applicant: Ford Global Technologies, LLC
    Inventors: Rajit Johri, Fazal Urrahman Syed, Minku Lee
  • Publication number: 20190367011
    Abstract: A hybrid vehicle includes an automated parking feature. A controller restarts the engine upon activation of the automated parking feature in situation where the normal engine starting control would have started the engine during the parking maneuver. As a result, engine starts during the parking maneuver are avoided.
    Type: Application
    Filed: June 4, 2018
    Publication date: December 5, 2019
    Inventors: Rajit Johri, Fazal Syed
  • Patent number: 10486687
    Abstract: A vehicle includes a powertrain and a controller. The powertrain has an engine and an electric machine. The controller is programmed to, for so long as a catalytic converter temperature is less than a threshold, maintain a steady state engine torque output and adjust an electric machine torque output to satisfy driver demand. The controller is further programmed to, responsive to the catalytic converter temperature exceeding the threshold, permit adjustments of the engine torque output to satisfy the driver demand.
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: November 26, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Rajit Johri, Fazal Urrahman Syed, Justin Panhans, Sassan Farahmand
  • Patent number: 10479349
    Abstract: Systems and methods for launching a hybrid vehicle that includes a motor/generator and an automatic transmission with a torque converter are described. The systems and methods may permit improved vehicle acceleration to enhance hybrid vehicle performance during specific vehicle launch conditions. The launch conditions may be established based on brake pedal position and accelerator pedal position.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: November 19, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Rajit Johri, Minku Lee, Justin Panhans
  • Patent number: 10471951
    Abstract: Propulsion for a vehicle is provided by a hybrid powertrain that includes a torque converter coupled to an electric machine and selectively coupled to an engine. The hybrid powertrain further includes a controller programmed to, responsive to a loss of speed feedback of the electric machine while the engine is disconnected from the torque converter and the torque converter is open, operate one or more of a gearbox, the electric machine, and the engine based on an impeller speed of the torque converter derived from a torque of the electric machine and a speed of the vehicle.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: November 12, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Rajit Johri, Fazal Urrahman Syed
  • Publication number: 20190338842
    Abstract: An electrified axle system includes a pair of wheels, a super positioning torque vectoring differential coupled between the wheels, and a controller. The super positioning torque vectoring differential includes a traction motor and a vectoring motor. The controller operates the vectoring motor in speed control mode to reduce a speed difference between the wheels responsive to the difference exceeding a threshold, and operates the vectoring motor in torque control mode responsive to the difference falling within a target range and an accelerator pedal position achieving a value that depends on lateral acceleration associated with the system.
    Type: Application
    Filed: May 3, 2018
    Publication date: November 7, 2019
    Inventors: Jose Velazquez Alcantar, Joseph Jay Torres, Peter James Barrette, Rajit Johri, Ming Lang Kuang, Corwin Stout, Jonathan Craig Sullivan
  • Patent number: 10399557
    Abstract: A vehicle includes a motor between an engine and transmission and a controller configured to control motor and engine torque during an upshift to generate a reserve torque during a preparatory phase applied to the transmission during a torque phase. The controller increases engine torque for the reserve torque, and decreases motor torque such that combined engine and motor torque satisfy driver demanded torque without retarding spark when available motor torque is insufficient to provide the reserve torque. A method for controlling a vehicle having a motor connected between an engine and a transmission includes increasing engine torque for reserve torque to be applied during a torque phase of an upshift responsive to available motor torque being insufficient to satisfy the reserve torque, and reducing engine torque by retarding spark only if combined engine torque and motor torque exceeds driver demand torque after reducing motor torque to a minimum threshold.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: September 3, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Rajit Johri, Christopher John Teslak, Fazal Urrahman Syed
  • Patent number: 10393259
    Abstract: A hybrid vehicle includes an engine, an electric machine selectively coupled to the engine, a transmission having a torque converter impeller coupled to the electric machine and a torque converter clutch configured to selectively couple the impeller to a turbine, and a controller configured to control pressure of the torque converter clutch responsive to estimated clutch capacity, which is adjusted by the controller to equal impeller torque responsive to impeller speed exceeding turbine speed during clutch disengagement. A model of estimated torque converter clutch capacity may be stored in memory and adapted to actual clutch capacity by applying a gain or offset determined during opening of the clutch.
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: August 27, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Jason Meyer, Jeffrey Allen Doering, Bernard D. Nefcy, Rajit Johri
  • Patent number: 10377369
    Abstract: Systems and methods for operating a hybrid powertrain that includes an engine and a motor/generator are described. The systems and methods provide a way of estimating driveline disconnect clutch torque so that driveline torque disturbances may be reduced. In one example, driveline disconnect clutch torque capacity and engine torque may be a basis for estimating driveline disconnect clutch torque.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: August 13, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Jason Meyer, Rajit Johri
  • Publication number: 20190241171
    Abstract: A vehicle includes an engine, an electric machine, a battery, and at least one controller. The vehicle may further comprise a port for supplying power to a load external to the vehicle. The controller is programmed to operate the engine at a power level based on a difference between a battery voltage and a reference voltage such that a power output by the electric machine reduces the difference. The power level may define an engine operating point that minimizes fuel consumption. The operating point may be an engine torque and an engine speed. The power level may be further based on a state of charge of the battery. The electric machine may be operated to cause the engine to rotate at an engine speed corresponding to the selected power level. The difference may be caused by varying power drawn by a load external to the vehicle.
    Type: Application
    Filed: April 16, 2019
    Publication date: August 8, 2019
    Inventors: Wei LIANG, Mark Steven YAMAZAKI, Xiaoyong WANG, Rajit JOHRI, Ryan Abraham McGEE, Ming Lang KUANG
  • Patent number: 10370000
    Abstract: According to one embodiment of this disclosure, a vehicle having an electric machine and at least one controller is described. The electric machine may be configured to generate creep torque to move the vehicle. The controller may be programmed to decrease a target speed of a torque converter impeller to create a desired brake torque and partially cancel the creep torque without application of friction brakes in response to a brake pedal being pressed while an accelerator pedal is not being pressed.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: August 6, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Rajit Johri, Francis Thomas Connolly, Fazal Urrahman Syed, Minku Lee, Mark Steven Yamazaki
  • Patent number: 10358125
    Abstract: A vehicle includes an engine and an electric machine coupled to a gearbox. A controller is programmed to predict, at an onset of a shift, a supplemental torque profile to fill a torque hole expected during the shift and an available electric machine torque during the shift. The controller is further programmed to, in response to the supplemental torque profile exceeding the available electric machine torque during the shift, operate the engine from the onset to achieve a torque reserve in anticipation of increasing the engine torque.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: July 23, 2019
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Mark Steven Yamazaki, Christopher John Teslak, Bernard D. Nefcy, Rajit Johri, Justin Panhans
  • Publication number: 20190219163
    Abstract: A hybrid vehicle includes an engine, an electric machine selectively coupled to the engine, a transmission having a torque converter impeller coupled to the electric machine and a torque converter clutch configured to selectively couple the impeller to a turbine, and a controller configured to control pressure of the torque converter clutch responsive to estimated clutch capacity, which is adjusted by the controller to equal impeller torque responsive to impeller speed exceeding turbine speed during clutch disengagement. A model of estimated torque converter clutch capacity may be stored in memory and adapted to actual clutch capacity by applying a gain or offset determined during opening of the clutch.
    Type: Application
    Filed: January 15, 2018
    Publication date: July 18, 2019
    Inventors: Jason Meyer, Jeffrey Allen Doering, Bernard D. Nefcy, Rajit Johri