Patents by Inventor Mark Steven Yamazaki

Mark Steven Yamazaki 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: 10486689
    Abstract: A method includes automatically operating an electrified vehicle in a noise reduction mode, via a control system of the electrified vehicle, if, based at least on noise restriction information and driver history information received by the control system, a current time and a current location of the electrified vehicle are appropriate for invoking the noise reduction mode.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: November 26, 2019
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: David Farrell, Mark Steven Yamazaki, Ming Cheng, Tony Tae-Jin Pak, Nagarjuna Muvva
  • Patent number: 10486678
    Abstract: A table of engine torque correction factors is used to compensate for noise factors. In a hybrid vehicle, the motor is used to measure engine torque during periods of constant transmission input shaft torque. By comparing the measured input torque to the requested engine torque, a controller can update the table of correction factors to compensate for changes in the noise factors. A service procedure may be implemented that systematically provides the controller an opportunity to update many values in the table.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: November 26, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Chen Zhang, Mark Steven Yamazaki, Yanan Zhao, Ming Lang Kuang
  • Publication number: 20190322316
    Abstract: A vehicle includes motors each configured to drive a front wheel of the vehicle, an electronic limited slip differential (eLSD) between rear wheels of the vehicle, and a controller to, responsive to vehicle turning and a power of each of the motors being less than a maximum value, alter operation of the motors to increase a difference between the powers. Otherwise, the controller operates the eLSD to bias torque toward one of the rear wheels.
    Type: Application
    Filed: April 20, 2018
    Publication date: October 24, 2019
    Inventors: Girish Gokul Chennupalli, Mark Steven Yamazaki
  • Patent number: 10414392
    Abstract: Systems and methods for operating a driveline of a hybrid vehicle are disclosed. In one example, powertrain output is limited or constrained so that powertrain output variation is limited to a desired level at different altitudes. The powertrain output may be constrained based on a ratio of a threshold electric machine torque to a threshold engine torque.
    Type: Grant
    Filed: January 3, 2017
    Date of Patent: September 17, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Chen Zhang, Mark Steven Yamazaki
  • Publication number: 20190248361
    Abstract: A method includes automatically operating an electrified vehicle in a noise reduction mode, via a control system of the electrified vehicle, if, based at least on noise restriction information and driver history information received by the control system, a current time and a current location of the electrified vehicle are appropriate for invoking the noise reduction mode.
    Type: Application
    Filed: February 13, 2018
    Publication date: August 15, 2019
    Inventors: David FARRELL, Mark Steven YAMAZAKI, Ming CHENG, Tony Tae-Jin PAK, Nagarjuna MUVVA
  • 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
  • Patent number: 10336315
    Abstract: A controller and a control strategy minimizes shift shock in a hybrid electric vehicle during a downshift conducted while the vehicle is in a regenerative braking mode by maintaining total powertrain torque at a desired target during the downshift. The controller has three preferable modes including modulating just engine torque, modulating just electric motor torque or simultaneously modulating both motor and engine torque.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: July 2, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Barney D Nefcy, Francis Thomas Connolly, Dan Colvin, Walt Joseph Ortmann, Marvin Paul Kraska, Dale Scott Crombez, Mark Steven Yamazaki
  • Patent number: 10322711
    Abstract: A vehicle includes an electric machine, a starter-generator, and a controller. The electric machine is coupled to a traction battery via an inverter. The starter-generator is mechanically coupled with an engine and electrically coupled with a low-voltage battery. And, the controller charges the low-voltage battery with power from the traction battery, and in response to a torque demand of the electric machine falling below a threshold defined by losses of the inverter, transitions to the starter-generator to charge the low-voltage battery.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: June 18, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Mark Steven Yamazaki, Christopher Alan Lear, Scott James Thompson, Rajit Johri, Fazal Urrahman Syed
  • Patent number: 10315644
    Abstract: Systems and methods for transitioning a torque source between speed control and torque control modes during a vehicle creep mode are disclosed. In one example, torque of an electric machine is adjusted in response to a torque converter model. The torque converter model provides for a locked or unlocked torque converter clutch.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: June 11, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Rajit Johri, Francis Thomas Connolly, Wei Liang, Bernard D. Nefcy, Xiaoyong Wang, Mark Steven Yamazaki, Ming Lang Kuang, Jeffrey Allen Doering
  • Publication number: 20190168765
    Abstract: A vehicle includes a step-ratio automatic transmission having clutches engageable to provide forward and reverse gears, an electric machine selectively coupled to the transmission, a main pump powered by the electric machine and supplying oil to actuate selected transmission clutches, a gear selector configured for selecting a transmission gear, and a controller configured to stop the electric machine when the gear selector selects park or neutral, to operate the electric machine in a speed control mode using a higher controller gain in response to the gear selector selecting forward or reverse while the electric machine is stopped until the electric machine and the main pump reach a first speed threshold to reduce engagement delay of at least one of the transmission clutches, and to operate the electric machine using a lower controller gain when the electric machine and the main pump exceed the first speed threshold.
    Type: Application
    Filed: January 18, 2019
    Publication date: June 6, 2019
    Inventors: Xiaoyong WANG, Rajit JOHRI, Mark Steven YAMAZAKI, Jeffrey Allen DOERING, Ming Lang KUANG, Wei LIANG
  • Patent number: 10308233
    Abstract: Systems and methods for operating a hybrid powertrain that includes an engine and a motor/generator are described. The systems and methods align in time an estimated motor torque and an actual motor torque to provide an estimated driveline torque. The alignment compensates for communications delays between different controllers over a controller area network.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: June 4, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Rajit Johri, Jeffrey Allen Doering, Ming Lang Kuang, Xiaoyong Wang, Mark Steven Yamazaki, Jason Meyer
  • Patent number: 10293810
    Abstract: A vehicle includes an engine having a crankshaft, a transmission having an input, and a torque converter mechanically coupled to the input. The vehicle further includes an electric machine mechanically coupled to the torque converter, a clutch configured to mechanically couple the electric machine and crankshaft, and one or more controllers. The one or more controllers are programmed to, in response to the transmission being in a drive or reverse gear and a speed of the vehicle being less than a predetermined value in an absence of driver demand, control the electric machine to achieve a target speed to cause the torque converter to output torque such that the speed of the vehicle approaches a generally constant speed less than or equal to the predetermined value when the vehicle is on a generally flat grade.
    Type: Grant
    Filed: October 18, 2013
    Date of Patent: May 21, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Xiaoyong Wang, Mark Steven Yamazaki, Wei Liang, Rajit Johri, Ryan Abraham McGee, Ming Lang Kuang
  • Publication number: 20190143961
    Abstract: A vehicle includes an engine, a motor, and a controller. The engine and motor are each configured to deliver torque to a torque converter impeller. The controller is programmed to, responsive to a demanded impeller torque exceeding an upper motor torque threshold while the motor alone is delivering torque to the impeller, increase motor torque to a value that is less than the threshold and that depends on a torque converter bypass clutch torque capacity and a torque converter turbine speed.
    Type: Application
    Filed: November 10, 2017
    Publication date: May 16, 2019
    Inventors: Jason Meyer, Rajit Johri, Mark Steven Yamazaki
  • Patent number: 10272907
    Abstract: A controller is configured to respond to an engine start command, operate the engine to produce excess torque beyond a demand torque, and in response to engine speed achieving a threshold, operate the starter-generator to load the engine to consume the excess torque and drive the engine speed toward an electric machine speed, and engage a clutch to couple the engine and an electric machine.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: April 30, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Rajit Johri, Mark Steven Yamazaki, Fazal Urrahman Syed
  • Patent number: 10259443
    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: Grant
    Filed: October 18, 2013
    Date of Patent: April 16, 2019
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Wei Liang, Mark Steven Yamazaki, Xiaoyong Wang, Rajit Johri, Ryan Abraham McGee, Ming Lang Kuang
  • Publication number: 20190031173
    Abstract: A table of engine torque correction factors is used to compensate for noise factors. In a hybrid vehicle, the motor is used to measure engine torque during periods of constant transmission input shaft torque. By comparing the measured input torque to the requested engine torque, a controller can update the table of correction factors to compensate for changes in the noise factors. A service procedure may be implemented that systematically provides the controller an opportunity to update many values in the table.
    Type: Application
    Filed: July 28, 2017
    Publication date: January 31, 2019
    Inventors: Chen Zhang, Mark Steven Yamazaki, Yanan Zhao, Ming Lang Kuang
  • Patent number: 10189460
    Abstract: Systems and methods for operating a hybrid vehicle driveline that includes an engine and a motor are presented. In one example, the systems and methods include one or more speed control modes where torque output of a motor is adjusted responsive to different control parameters in the different control modes.
    Type: Grant
    Filed: February 12, 2015
    Date of Patent: January 29, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Rajit Johri, Wei Liang, Mark Steven Yamazaki, Xiaoyong Wang, Jeffrey Allen Doering, Ming Lang Kuang
  • Patent number: 10183674
    Abstract: A vehicle includes a step-ratio automatic transmission having clutches engageable to provide forward and reverse gears, an electric machine selectively coupled to the transmission, a main pump powered by the electric machine and supplying oil to actuate selected transmission clutches, a gear selector configured for selecting a transmission gear, and a controller configured to stop the electric machine when the gear selector selects park or neutral, to operate the electric machine in a speed control mode using a higher controller gain in response to the gear selector selecting forward or reverse while the electric machine is stopped until the electric machine and the main pump reach a first speed threshold to reduce engagement delay of at least one of the transmission clutches, and to operate the electric machine using a lower controller gain when the electric machine and the main pump exceed the first speed threshold.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: January 22, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Xiaoyong Wang, Rajit Johri, Mark Steven Yamazaki, Jeffrey Allen Doering, Ming Lang Kuang, Wei Liang