Patents by Inventor Charles F. Long

Charles F. Long 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: 11420609
    Abstract: Systems and methods are provided for controlling a transmission. An engine stop-start event may be allowed or denied based on one or more characteristics of the vehicle including the transmission.
    Type: Grant
    Filed: December 14, 2020
    Date of Patent: August 23, 2022
    Assignee: Allison Transmission, Inc.
    Inventors: Claire Etchason, Jacob Hoeschen, Charles F. Long
  • Publication number: 20220185260
    Abstract: Systems and methods are provided for controlling a transmission. An engine stop-start event may be allowed or denied based on one or more characteristics of the vehicle including the transmission.
    Type: Application
    Filed: December 14, 2020
    Publication date: June 16, 2022
    Inventors: Claire Etchason, Jacob Hoeschen, Charles F. Long
  • Publication number: 20210293330
    Abstract: An electro-hydraulic control system for a multispeed transmission having a plurality of torque-transmitting mechanisms includes a controller for operably controlling the transmission, a fluid source for supplying hydraulic fluid, and a plurality of torque-transmitting mechanisms being operably selected between an applied and an unapplied state to achieve a plurality of ranges including at least one reverse, a neutral, and a plurality of forward ranges. The system includes a plurality of trim systems having pressure control solenoids and trim valves. The system may also include one or more shift valves disposed in fluid communication with the fluid source and being capable of moving between stroked and de-stroked positions. In any given range, only two of the plurality of torque-transmitting mechanisms may be applied. Moreover, three of the plurality of pressure control solenoids are normally high solenoids, and the remaining solenoids are normally low solenoids.
    Type: Application
    Filed: June 10, 2021
    Publication date: September 23, 2021
    Inventors: Eric Tryon, Charles F. Long, Bryan Hagelskamp
  • Patent number: 11047474
    Abstract: An electro-hydraulic control system for a multispeed transmission having a plurality of torque-transmitting mechanisms includes a controller for operably controlling the transmission, a fluid source for supplying hydraulic fluid, and a plurality of torque-transmitting mechanisms being operably selected between an applied and an unapplied state to achieve a plurality of ranges including at least one reverse, a neutral, and a plurality of forward ranges. The system includes a plurality of trim systems having pressure control solenoids and trim valves. The system may also include one or more shift valves disposed in fluid communication with the fluid source and being capable of moving between stroked and de-stroked positions. In any given range, only two of the plurality of torque-transmitting mechanisms may be applied. Moreover, three of the plurality of pressure control solenoids are normally high solenoids, and the remaining solenoids are normally low solenoids.
    Type: Grant
    Filed: June 20, 2018
    Date of Patent: June 29, 2021
    Assignee: ALLISON TRANSMISSION, INC.
    Inventors: Eric Tryon, Charles F. Long, Bryan Hagelskamp
  • Patent number: 10975960
    Abstract: A transmission system includes a fluid-coupling device, an electro-hydraulic control system, and a clutch. The fluid-coupling device includes an input coupled to an impeller, an output coupled to a turbine, and a stator disposed between the impeller and the turbine. The electro-hydraulic control system includes a flow valve disposed in fluid communication with the input and the output of the fluid-coupling device that is movable between at least a first position and a second position, at least one trim valve system fluidly coupled to the flow valve, and a solenoid disposed in fluid communication with the flow valve that is electrically controllable between an energized state and a de-energized state. The clutch is disposable in fluid communication with the flow valve and controllable between an applied position and an unapplied position.
    Type: Grant
    Filed: April 23, 2019
    Date of Patent: April 13, 2021
    Assignee: ALLISON TRANSMISSION, INC.
    Inventors: Michael Rietdorf, Charles F. Long
  • Publication number: 20210054927
    Abstract: A hydraulic system of a transmission having a controller and a variable displacement pump. The pump includes an inlet and outlet and is adapted to be driven by a torque-generating mechanism. The system also includes a lube circuit fluidly coupled to the pump. A lube regulator valve is disposed in the lube circuit, such that the lube regulator valve is configured to move between at least a regulated position and an unregulated position. The regulated position corresponds to a regulated pressure in the lube circuit. A pressure switch is fluidly coupled to the lube regulator valve and configured to move between a first position and a second position, where the switch is disposed in electrical communication with the controller. A solenoid is disposed in electrical communication with the controller and is controllably coupled to the pump to alter the displacement of the pump.
    Type: Application
    Filed: November 6, 2020
    Publication date: February 25, 2021
    Inventors: Charles F. Long, Charles T. Taylor
  • Patent number: 10920875
    Abstract: An electro-hydraulic control system for a multispeed transmission having a plurality of torque-transmitting mechanisms includes a controller for operably controlling the transmission, a fluid source for supplying hydraulic fluid, and a plurality of torque-transmitting mechanisms being operably selected between an applied and an unapplied state to achieve a plurality of ranges including at least one reverse, a neutral, and a plurality of forward ranges. The system includes a plurality of trim systems having pressure control solenoids and trim valves. The system may also include one or more shift valves disposed in fluid communication with the fluid source and being capable of moving between stroked and de-stroked positions. In any given range, only two of the plurality of torque-transmitting mechanisms may be applied. Moreover, three of the plurality of pressure control solenoids are normally high solenoids, and the remaining solenoids are normally low solenoids.
    Type: Grant
    Filed: June 20, 2018
    Date of Patent: February 16, 2021
    Assignee: ALLISON TRANSMISSION, INC.
    Inventors: Eric Tryon, Charles F. Long, Bryan Hagelskamp
  • Patent number: 10844951
    Abstract: An apparatus and method of controlling a torque transmitting apparatus having multiple selectively engageable couplers is provided. The multiple couplers may be selectively engaged and disengaged to provide a mechanical, friction or fluid coupling between portions of the torque transmitting apparatus and other components of a vehicle powertrain during various operational stages. The control apparatus includes a fluid pressure control device and a fluid flow control device.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: November 24, 2020
    Assignee: Allison Transmission, Inc.
    Inventors: Charles F. Long, David C. Ames
  • Patent number: 10830341
    Abstract: An electro-hydraulic control system for a multispeed transmission having a plurality of torque-transmitting mechanisms includes a controller for operably controlling the transmission, a fluid source for supplying hydraulic fluid, and a plurality of torque-transmitting mechanisms being operably selected between an applied and an unapplied state to achieve a plurality of ranges including at least one reverse, a neutral, and a plurality of forward ranges. The system includes a plurality of trim systems having pressure control solenoids and trim valves. The system may also include one or more shift valves disposed in fluid communication with the fluid source and being capable of moving between stroked and de-stroked positions. In any given range, only two of the plurality of torque-transmitting mechanisms may be applied. Moreover, three of the plurality of pressure control solenoids are normally high solenoids, and the remaining solenoids are normally low solenoids.
    Type: Grant
    Filed: June 20, 2018
    Date of Patent: November 10, 2020
    Assignee: ALLISON TRANSMISSION, INC.
    Inventors: Eric Tryon, Charles F. Long, Bryan Hagelskamp
  • Patent number: 10830343
    Abstract: A hydraulic system of a transmission having a controller and a variable displacement pump. The pump includes an inlet and outlet and is adapted to be driven by a torque-generating mechanism. The system also includes a lube circuit fluidly coupled to the pump. A lube regulator valve is disposed in the lube circuit, such that the lube regulator valve is configured to move between at least a regulated position and an unregulated position. The regulated position corresponds to a regulated pressure in the lube circuit. A pressure switch is fluidly coupled to the lube regulator valve and configured to move between a first position and a second position, where the switch is disposed in electrical communication with the controller. A solenoid is disposed in electrical communication with the controller and is controllably coupled to the pump to alter the displacement of the pump.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: November 10, 2020
    Assignee: ALLISON TRANSMISSION, INC.
    Inventors: Charles F. Long, Charles T. Taylor
  • Patent number: 10780853
    Abstract: The present disclosure is related to a transmission for a powered vehicle. The transmission includes a housing defining an interior of the transmission and a fluid supply portion disposed in the housing. The fluid supply portion is configured to supply fluid throughout the transmission. The transmission also includes a first fluid circuit disposed within the housing and defining a first fluid path in fluid communication with the fluid supply portion. A second fluid circuit fluidly defines a second fluid path in fluid communication with the fluid supply portion. The transmission further includes a coupling mechanism for fluidly coupling the first fluid circuit and second fluid circuit, wherein the second fluid circuit is disposed outside the housing of the transmission.
    Type: Grant
    Filed: October 1, 2012
    Date of Patent: September 22, 2020
    Assignee: ALLISON TRANSMISSION, INC.
    Inventors: Charles F. Long, Richard H. Price
  • Patent number: 10718426
    Abstract: An electro-hydraulic control system for a multispeed transmission having a plurality of torque-transmitting mechanisms includes a controller for operably controlling the transmission, a fluid source for supplying hydraulic fluid, and a plurality of torque-transmitting mechanisms being operably selected between an applied and an unapplied state to achieve a plurality of ranges including at least one reverse, a neutral, and a plurality of forward ranges. The system includes a plurality of trim systems having pressure control solenoids and trim valves. The system may also include one or more shift valves disposed in fluid communication with the fluid source and being capable of moving between stroked and de-stroked positions. In any given range, only two of the plurality of torque-transmitting mechanisms may be applied. Moreover, three of the plurality of pressure control solenoids are normally high solenoids, and the remaining solenoids are normally low solenoids.
    Type: Grant
    Filed: June 20, 2018
    Date of Patent: July 21, 2020
    Assignee: ALLISON TRANSMISSION, INC.
    Inventors: Eric Tryon, Charles F. Long, Bryan Hagelskamp
  • Publication number: 20190323567
    Abstract: A transmission system includes a fluid-coupling device, an electro-hydraulic control system, and a clutch. The fluid-coupling device includes an input coupled to an impeller, an output coupled to a turbine, and a stator disposed between the impeller and the turbine. The electro-hydraulic control system includes a flow valve disposed in fluid communication with the input and the output of the fluid-coupling device that is movable between at least a first position and a second position, at least one trim valve system fluidly coupled to the flow valve, and a solenoid disposed in fluid communication with the flow valve that is electrically controllable between an energized state and a de-energized state. The clutch is disposable in fluid communication with the flow valve and controllable between an applied position and an unapplied position.
    Type: Application
    Filed: April 23, 2019
    Publication date: October 24, 2019
    Inventors: Michael Rietdorf, Charles F. Long
  • Patent number: 10451178
    Abstract: An auxiliary hydraulic pressurization system for use with a vehicle including a transmission having a hydraulic reservoir, a hydraulic circuit, and a main pump may include an auxiliary pump and a controller. The auxiliary pump has a low side adapted to be coupled to the hydraulic reservoir and a high side adapted to be coupled to the hydraulic circuit. The controller is electrically connectable to the auxiliary pump and is configured to turn on the auxiliary pump in response to receipt of a signal indicating that the vehicle is in a stop condition to maintain hydraulic pressurization of the hydraulic circuit of the transmission when the vehicle is in the stop condition.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: October 22, 2019
    Assignee: Allison Transmission, Inc.
    Inventors: Charles F. Long, Phillip McCauley, Charles Taylor
  • Patent number: 10337607
    Abstract: A hydraulic system of a transmission includes a controller, a pump, a fluid circuit fluidly coupled to the pump, a pressure regulator for regulating pressure in the fluid circuit, a cooler circuit fluidly coupled to the pressure regulator, a filter disposed in the fluid circuit downstream from the cooler circuit, and a bypass circuit disposed in the fluid circuit and fluidly coupled to the pressure regulator. The bypass circuit includes a valve movable between an open position and a closed position. In the open position, a first portion of fluid flowing from the pressure regulator flows through the bypass circuit and a second portion of the fluid flows through the cooler circuit and filter. In the closed position, the fluid flowing from the pressure regulator only flows through the cooler circuit and filter.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: July 2, 2019
    Assignee: ALLISON TRANSMISSION, INC.
    Inventors: Lawrence E. Dewey, Randall R. Kirk, Charles F. Long
  • Publication number: 20190195353
    Abstract: A hydraulic system of a transmission having a controller and a variable displacement pump. The pump includes an inlet and outlet and is adapted to be driven by a torque-generating mechanism. The system also includes a lube circuit fluidly coupled to the pump. A lube regulator valve is disposed in the lube circuit, such that the lube regulator valve is configured to move between at least a regulated position and an unregulated position. The regulated position corresponds to a regulated pressure in the lube circuit. A pressure switch is fluidly coupled to the lube regulator valve and configured to move between a first position and a second position, where the switch is disposed in electrical communication with the controller. A solenoid is disposed in electrical communication with the controller and is controllably coupled to the pump to alter the displacement of the pump.
    Type: Application
    Filed: March 5, 2019
    Publication date: June 27, 2019
    Inventors: Charles F. Long, Charles T. Taylor
  • Patent number: 10253874
    Abstract: A hydraulic system of a transmission having a controller and a variable displacement pump. The pump includes an inlet and outlet and is adapted to be driven by a torque-generating mechanism. The system also includes a lube circuit fluidly coupled to the pump. A lube regulator valve is disposed in the lube circuit, such that the lube regulator valve is configured to move between at least a regulated position and an unregulated position. The regulated position corresponds to a regulated pressure in the lube circuit. A pressure switch is fluidly coupled to the lube regulator valve and configured to move between a first position and a second position, where the switch is disposed in electrical communication with the controller. A solenoid is disposed in electrical communication with the controller and is controllably coupled to the pump to alter the displacement of the pump.
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: April 9, 2019
    Assignee: ALLISON TRANSMISSION, INC.
    Inventors: Charles F. Long, Charles T. Taylor
  • Patent number: 10253875
    Abstract: An apparatus for multiplexing gear engagement control in an automatic transmission is provided. At least two friction engagement devices are configured to selectively engage and disengage a different gear ratio of the transmission. A trim system is configured to selectively supply engagement and disengagement pressures to at least one fluid passageway. A first control valve is fluidly coupled directly to the at least one fluid passageway and directly to each of the at least two friction engagement devices. The first control valve is configured to selectively route the engagement and disengagement pressures through the first control valve directly to the at least two friction devices.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: April 9, 2019
    Assignee: Allison Transmission, Inc.
    Inventors: Charles F. Long, Darren J. Weber, John William Edward Fuller
  • Publication number: 20190003578
    Abstract: An electro-hydraulic control system for a multispeed transmission having a plurality of torque-transmitting mechanisms includes a controller for operably controlling the transmission, a fluid source for supplying hydraulic fluid, and a plurality of torque-transmitting mechanisms being operably selected between an applied and an unapplied state to achieve a plurality of ranges including at least one reverse, a neutral, and a plurality of forward ranges. The system includes a plurality of trim systems having pressure control solenoids and trim valves. The system may also include one or more shift valves disposed in fluid communication with the fluid source and being capable of moving between stroked and de-stroked positions. In any given range, only two of the plurality of torque-transmitting mechanisms may be applied. Moreover, three of the plurality of pressure control solenoids are normally high solenoids, and the remaining solenoids are normally low solenoids.
    Type: Application
    Filed: June 20, 2018
    Publication date: January 3, 2019
    Inventors: Eric Tryon, Charles F. Long, Bryan Hagelskamp
  • Publication number: 20190003580
    Abstract: An electro-hydraulic control system for a multispeed transmission having a plurality of torque-transmitting mechanisms includes a controller for operably controlling the transmission, a fluid source for supplying hydraulic fluid, and a plurality of torque-transmitting mechanisms being operably selected between an applied and an unapplied state to achieve a plurality of ranges including at least one reverse, a neutral, and a plurality of forward ranges. The system includes a plurality of trim systems having pressure control solenoids and trim valves. The system may also include one or more shift valves disposed in fluid communication with the fluid source and being capable of moving between stroked and de-stroked positions. In any given range, only two of the plurality of torque-transmitting mechanisms may be applied. Moreover, three of the plurality of pressure control solenoids are normally high solenoids, and the remaining solenoids are normally low solenoids.
    Type: Application
    Filed: June 20, 2018
    Publication date: January 3, 2019
    Inventors: Eric Tryon, Charles F. Long, Bryan Hagelskamp