Patents by Inventor Chin Chul CHOI

Chin Chul CHOI 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).

  • Apparatus for reducing noise of gear pump through uneven pitch-simulated control and method thereof
    Patent number: 11578718
    Abstract: An apparatus for reducing noise of a gear pump through uneven pitch-simulated control includes a calculation unit to calculate different control current values for each tooth of a teeth order by applying a teeth number, the teeth order, and a teeth angle of the gear pump in which a plurality of teeth are evenly formed, a storage unit to map and store the teeth order and the different control current values corresponding to the teeth order for each tooth, and a current controller to variably generate the control current value mapped corresponding to the teeth order when each tooth reaches a reference position when the gear pump rotates by a motor, wherein the control current value is added to a reference current value of a motor control signal and applied to the motor.
    Type: Grant
    Filed: June 7, 2021
    Date of Patent: February 14, 2023
    Assignees: Hyundai Motor Company, Kia Corporation, Myunghwa Ind. Co., Ltd.
    Inventors: Sung Wook Jang, Dong Kuk Han, MinSu Kim, Chin Chul Choi, Byung Jun Hwang, Hyung Suk Kim
  • Apparatus for Reducing Noise of Gear Pump Through Uneven Pitch-Simulated Control and Method Thereof
    Publication number: 20220049696
    Abstract: An apparatus for reducing noise of a gear pump through uneven pitch-simulated control includes a calculation unit to calculate different control current values for each tooth of a teeth order by applying a teeth number, the teeth order, and a teeth angle of the gear pump in which a plurality of teeth are evenly formed, a storage unit to map and store the teeth order and the different control current values corresponding to the teeth order for each tooth, and a current controller to variably generate the control current value mapped corresponding to the teeth order when each tooth reaches a reference position when the gear pump rotates by a motor, wherein the control current value is added to a reference current value of a motor control signal and applied to the motor.
    Type: Application
    Filed: June 7, 2021
    Publication date: February 17, 2022
    Inventors: Sung Wook Jang, Dong Kuk Han, MinSu Kim, Chin Chul Choi, Byung Jun Hwang, Hyung Suk Kim
  • METHOD FOR CONTROLLING ELECTRIC OIL PUMP
    Publication number: 20190331216
    Abstract: The present disclosure provides a method for controlling the electric oil pump for a vehicle having an idle stop and go system. The system includes a control device for controlling the operation of the electric oil pump when the vehicle is stopped and restarted again. In the system, the operation of the electric oil pump is performed by an actual RPM control applying a target RPM of the electric oil pump and a torque or a current value of the electric oil pump.
    Type: Application
    Filed: March 4, 2019
    Publication date: October 31, 2019
    Inventors: Geon Oh DONG, Chin Chul CHOI, Byung Jun HWANG, Dong-Kuk HAN, Chul-Wan PARK