Patents by Inventor Jeffrey M. DAVID

Jeffrey M. DAVID 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: 11884161
    Abstract: Methods and systems are provided for an electric drive train of a vehicle. In one example, a method may include operating a first motor of a set of motors in a torque control mode at a first speed while operating a second motor of the set of motors in a speed control mode at a second speed. The second speed may be determined based on the first speed and torque may be summed at an output node of a planetary gear set coupled to each of the set of motors.
    Type: Grant
    Filed: May 7, 2021
    Date of Patent: January 30, 2024
    Assignee: DANA HEAVY VEHICLE SYSTEMS GROUP, LLC
    Inventors: Jeffrey M. David, Travis J. Miller, Mark A. Davis
  • Patent number: 11850946
    Abstract: Methods and systems for an electric drive assembly are provided herein. In one example, a method for operation of an electric drive system is provided that includes coordinating operation of a first electric drive unit and a second electric drive unit based on a first power request. In the system, each of the first and second electric drive units include a planetary gear reduction that delivers power from a pair of motors to a set of axle shafts, and the planetary gear reductions have asymmetric gear ratios.
    Type: Grant
    Filed: April 9, 2021
    Date of Patent: December 26, 2023
    Assignee: DANA HEAVY VEHICLE SYSTEMS GROUP, LLC
    Inventors: Jeffrey M. David, Mark A. Davis, Darren J. Ziskovsky, Aaron D. Gries, Jordan M. Houser
  • Patent number: 11668374
    Abstract: A traction device including a ring member, a carrier, and a sun member and an electric motor, wherein the electric motor is coupled to at least one of the ring member, the carrier, and the sun member.
    Type: Grant
    Filed: February 18, 2022
    Date of Patent: June 6, 2023
    Assignee: Dana Limited
    Inventors: Jeffrey M. David, Daniel J. Dawe, Charles B. Lohr, III, Gordon M. McIndoe, Travis J. Miller, Sebastian J. Peters, Patrick R. Sexton
  • Publication number: 20230099191
    Abstract: A method and system for shifting a transmission that includes one or more mechanical clutches without clutch plates is described. In one example, a torque output of an electric machine is adjusted in response to a request to shift a transmission so that forces that hold the mechanical clutch in an engaged position may be reduced.
    Type: Application
    Filed: September 12, 2022
    Publication date: March 30, 2023
    Inventors: James ALLEN, Jordan M. HOUSER, Jared REICHERT, Darren J. ZISKOVSKY, Jeffrey M. DAVID
  • Publication number: 20230070859
    Abstract: Methods and systems for an electric drive assembly are provided herein. In one example, an electric drive system is provided that includes two multi-motor drive units with associated planetary gear reductions that have asymmetric gear ratios. The planetary gear reduction in each drive unit includes a ring gear and a sun gear that are rotationally coupled to a pair of motors and a carrier rotationally coupled to an output gear that interfaces with a gear reduction of an axle assembly.
    Type: Application
    Filed: November 14, 2022
    Publication date: March 9, 2023
    Inventors: Jeffrey M. DAVID, Mark A. DAVIS, Darren J. ZISKOVSKY, Aaron D. GRIES, Jordan M. HOUSER
  • Publication number: 20230054823
    Abstract: Methods and systems for operating a driveline that includes two electric machines are described. In one example, one electric machine is operated in a generator mode and the other electric machine is operated in a motor mode so that electric power that is generated by the electric machine that is operated in the generator mode is consumed by the electric machine that is operated in the motor mode.
    Type: Application
    Filed: August 20, 2021
    Publication date: February 23, 2023
    Inventor: Jeffrey M. DAVID
  • Publication number: 20230014139
    Abstract: A method of controlling a continuously variable electric drivetrain (CVED) including a high ratio traction drive transmission and at least one of a first motor-generator and a second motor-generator is disclosed. The method includes the steps of receiving an output speed, determining a kinematic output speed, and determining a slip state of the high ratio traction drive transmission based on a comparison of the output speed to the kinematic output speed.
    Type: Application
    Filed: September 21, 2022
    Publication date: January 19, 2023
    Inventors: Jeffrey M. DAVID, Travis J. MILLER
  • Patent number: 11529869
    Abstract: Methods and systems for an electric drive assembly are provided herein. In one example, an electric drive system is provided that includes two multi-motor drive units with associated planetary gear reductions that have asymmetric gear ratios. The planetary gear reduction in each drive unit includes a ring gear and a sun gear that are rotationally coupled to a pair of motors and a carrier rotationally coupled to an output gear that interfaces with a gear reduction of an axle assembly.
    Type: Grant
    Filed: April 9, 2021
    Date of Patent: December 20, 2022
    Assignee: Dana Heavy Vehicle Systems Group, LLC
    Inventors: Jeffrey M. David, Mark A. Davis, Darren J. Ziskovsky, Aaron D. Gries, Jordan M. Houser
  • Publication number: 20220379737
    Abstract: Methods and systems are provided for an electric drivetrain. In one example, the electric drivetrain system includes a first and a second electric motor-generator rotationally coupled to a planetary assembly that is rotationally coupled to a drive axle via an output gear. The system further includes a controller that is configured to, during a first operating condition, operate each of the first and second electric motor-generators in a motor mode or a generator mode and hold the output gear at a zero speed.
    Type: Application
    Filed: May 28, 2021
    Publication date: December 1, 2022
    Inventors: Jeffrey M. DAVID, Travis J. MILLER
  • Publication number: 20220355677
    Abstract: Methods and systems are provided for an electric drive train of a vehicle. In one example, a method may include operating a first motor of a set of motors in a torque control mode at a first speed while operating a second motor of the set of motors in a speed control mode at a second speed. The second speed may be determined based on the first speed and torque may be summed at an output node of a planetary gear set coupled to each of the set of motors.
    Type: Application
    Filed: May 7, 2021
    Publication date: November 10, 2022
    Inventors: Jeffrey M. DAVID, Travis J. MILLER, Mark A. DAVIS
  • Publication number: 20220355783
    Abstract: Methods and systems are provided for an electric drive train of a hybrid electric vehicle (HEV). In one example, the electric drive train may include a four-node planetary gear set with a first motor coupled to a first input node, a second motor coupled to a second input node and an engine coupled to a third input node of the planetary gear set. The third node is positioned between the first and second input nodes. Torque delivered to each input node is summed at an output node of the four-node planetary gear set.
    Type: Application
    Filed: May 20, 2022
    Publication date: November 10, 2022
    Inventors: Jeffrey M. DAVID, Travis J. MILLER, Mark A. DAVIS
  • Patent number: 11485346
    Abstract: A method of controlling a continuously variable electric drivetrain (CVED) including a high ratio traction drive transmission and at least one of a first motor-generator and a second motor-generator is disclosed. The method includes the steps of receiving a output speed, determining a kinematic output speed, and determining a slip state of the high ratio traction drive transmission based on a comparison of the output speed to the kinematic output speed.
    Type: Grant
    Filed: April 16, 2021
    Date of Patent: November 1, 2022
    Assignee: Dana Automotive Systems Group, LLC
    Inventors: Jeffrey M. David, Travis J. Miller
  • Publication number: 20220324333
    Abstract: Methods and systems for an electric drive assembly are provided herein. In one example, a method for operation of an electric drive system is provided that includes coordinating operation of a first electric drive unit and a second electric drive unit based on a first power request. In the system, each of the first and second electric drive units include a planetary gear reduction that delivers power from a pair of motors to a set of axle shafts, and the planetary gear reductions have asymmetric gear ratios.
    Type: Application
    Filed: April 9, 2021
    Publication date: October 13, 2022
    Inventors: Jeffrey M. DAVID, Mark A. DAVIS, Darren J. ZISKOVSKY, Aaron D. GRIES, Jordan M. HOUSER
  • Publication number: 20220324321
    Abstract: Methods and systems for an electric drive assembly are provided herein. In one example, an electric drive system is provided that includes two multi-motor drive units with associated planetary gear reductions that have asymmetric gear ratios. The planetary gear reduction in each drive unit includes a ring gear and a sun gear that are rotationally coupled to a pair of motors and a carrier rotationally coupled to an output gear that interfaces with a gear reduction of an axle assembly.
    Type: Application
    Filed: April 9, 2021
    Publication date: October 13, 2022
    Inventors: Jeffrey M. DAVID, Mark A. DAVIS, Darren J. ZISKOVSKY, Aaron D. GRIES, Jordan M. HOUSER
  • Patent number: 11420613
    Abstract: Methods and systems are provided for an electric drive train of a hybrid electric vehicle (HEV). In one example, the electric drive train may include a four-node planetary gear set with a first motor coupled to a first input node, a second motor coupled to a second input node and an engine coupled to a third input node of the planetary gear set. The third node is positioned between the first and second input nodes. Torque delivered to each input node is summed at an output node of the four-node planetary gear set.
    Type: Grant
    Filed: May 7, 2021
    Date of Patent: August 23, 2022
    Assignee: Dana Heavy Vehicle Systems Group, LLC
    Inventors: Jeffrey M. David, Travis J. Miller, Mark A. Davis
  • Publication number: 20220213949
    Abstract: A traction device including a ring member, a carrier, and a sun member and an electric motor, wherein the electric motor is coupled to at least one of the ring member, the carrier, and the sun member.
    Type: Application
    Filed: February 18, 2022
    Publication date: July 7, 2022
    Inventors: Jeffrey M. DAVID, Daniel J. DAWE, Charles B. LOHR, III, Gordon M. MCINDOE, Travis J. MILLER, Sebastian J. PETERS, Patrick R. SEXTON
  • Patent number: 11306802
    Abstract: A traction device including a ring member, a carrier, and a sun member and an electric motor, wherein the electric motor is coupled to at least one of the ring member, the carrier, and the sun member.
    Type: Grant
    Filed: April 2, 2019
    Date of Patent: April 19, 2022
    Assignee: Dana Limited
    Inventors: Jeffrey M. David, Daniel J. Dawe, Charles B. Lohr, III, Gordon M. McIndoe, Travis J. Miller, Sebastian J. Peters, Patrick R. Sexton
  • Publication number: 20210229653
    Abstract: A method of controlling a continuously variable electric drivetrain (CVED) including a high ratio traction drive transmission and at least one of a first motor-generator and a second motor-generator is disclosed. The method includes the steps of receiving a an output speed, determining a kinematic output speed, and determining a slip state of the high ratio traction drive transmission based on a comparison of the output speed to the kinematic output speed.
    Type: Application
    Filed: April 16, 2021
    Publication date: July 29, 2021
    Inventors: Jeffrey M. DAVID, Travis J. MILLER
  • Patent number: 11021144
    Abstract: A method of controlling a continuously variable electric drivetrain (CVED) including a high ratio traction drive transmission and at least one of a first motor-generator and a second motor-generator is disclosed. The method includes the steps of receiving a an output speed, determining a kinematic output speed, and determining a slip state of the high ratio traction drive transmission based on a comparison of the output speed to the kinematic output speed.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: June 1, 2021
    Assignee: Dana Automotive Systems Group, LLC
    Inventors: Jeffrey M. David, Travis J. Miller
  • Publication number: 20210095744
    Abstract: A traction device including a ring member, a carrier, and a sun member and an electric motor, wherein the electric motor is coupled to at least one of the ring member, the carrier, and the sun member.
    Type: Application
    Filed: April 2, 2019
    Publication date: April 1, 2021
    Inventors: Jeffrey M. DAVID, Daniel J. DAWE, Charles B. LOHR, III, Gordon M. MCINDOE, Travis J. MILLER, Sebastian J. PETERS, Patrick R. SEXTON