Patents by Inventor Yuji Kikuyama

Yuji Kikuyama 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: 20170341915
    Abstract: A method of controlling a work vehicle including a steering cylinder operating a steering wheel by hydraulic oil supplied thereto, a steering member receiving an input for operating the steering wheel, and a steering valve unit which is connected to the steering member and supplies the hydraulic oil to the steering cylinder, the method includes: obtaining a speed of the work vehicle and a steering angle of the steering wheel; and decreasing a correction factor for correcting a deviation amount of actual steering angle information of the steering wheel with respect to target information as information on a target steering angle of the steering wheel with respect to an operation amount of the steering member when the speed of the work vehicle increases in a case where the steering angle of the steering wheel obtained based on the steering angle is in a predetermined range from a neutral position.
    Type: Application
    Filed: May 31, 2016
    Publication date: November 30, 2017
    Inventors: Shinji Kaneko, Jun Hashimoto, Yuji Kikuyama
  • Patent number: 9637126
    Abstract: A work vehicle has a running motor and includes a first controller generating a speed command value to control the motor and adding an actual running speed of the work vehicle to a relationship between a torque command value for a torque in the motor and a running speed of the work vehicle to generate a first torque command value and a second controller generating a second torque command value based on the speed command value and the actual running speed, controls the motor using a smaller one of the first and second torque command values when the work vehicle moves forward, and controls the motor using a greater one of them when the work vehicle moves backward. The first controller determines the speed command value based on an accelerator opening used to regulate the running speed, the actual running speed, and an actual movement direction of the work vehicle.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: May 2, 2017
    Assignee: Komatsu Ltd.
    Inventors: Yuji Kikuyama, Yoshitaka Onodera
  • Patent number: 9045045
    Abstract: A work vehicle is provided with a traveling motor, and includes a first control unit generating a speed command value for controlling the motor and changing the speed command value according to passage of time when an opening of an accelerator that adjusts a traveling speed is larger than 0, and assigning an actual traveling speed of the work vehicle to a relationship between a torque command value that is a command value of torque to be generated by the motor and the traveling speed of the work vehicle to generate a first torque command value; and a second control unit generating a second torque command value based on the speed command value generated by the first control unit and the actual traveling speed, and controlling the motor based on the first torque command value or the second torque command value.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: June 2, 2015
    Assignee: Komatsu Ltd.
    Inventors: Yoshitaka Onodera, Yuji Kikuyama, Yoshiaki Nagashima, Hiroyuki Kijima
  • Publication number: 20150039164
    Abstract: A work vehicle is provided with a traveling motor, and includes a first control unit generating a speed command value for controlling the motor and changing the speed command value according to passage of time when an opening of an accelerator that adjusts a traveling speed is larger than 0, and assigning an actual traveling speed of the work vehicle to a relationship between a torque command value that is a command value of torque to be generated by the motor and the traveling speed of the work vehicle to generate a first torque command value; and a second control unit generating a second torque command value based on the speed command value generated by the first control unit and the actual traveling speed, and controlling the motor based on the first torque command value or the second torque command value.
    Type: Application
    Filed: February 28, 2013
    Publication date: February 5, 2015
    Inventors: Yoshitaka Onodera, Yuji Kikuyama, Yoshiaki Nagashima, Hiroyuki Kijima
  • Publication number: 20140350799
    Abstract: A work vehicle has a running motor and includes a first controller generating a speed command value to control the motor and adding an actual running speed of the work vehicle to a relationship between a torque command value for a torque in the motor and a running speed of the work vehicle to generate a first torque command value and a second controller generating a second torque command value based on the speed command value and the actual running speed, controls the motor using a smaller one of the first and second torque command values when the work vehicle moves forward, and controls the motor using a greater one of them when the work vehicle moves backward. The first controller determines the speed command value based on an accelerator opening used to regulate the running speed, the actual running speed, and an actual movement direction of the work vehicle.
    Type: Application
    Filed: February 28, 2013
    Publication date: November 27, 2014
    Inventors: Yuji Kikuyama, Yoshitaka Onodera