Patents by Inventor Woulsun CHOI

Woulsun 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).

  • Power transmission system of hybrid electric vehicle
    Patent number: 8915815
    Abstract: A power transmission system may include: an input shaft receiving engine torque; a first planetary gear set disposed on the input shaft and including a first sun gear selectively connected to a transmission housing, a first ring gear directly connected to the input shaft, and a first planet carrier; a second planetary gear set disposed on the input shaft and including a second sun gear, a second ring gear selectively connected to the first ring gear and selectively connected to the transmission housing, and a second planet carrier directly connected to the first planet carrier and directly connected to an output gear; a first motor/generator directly connected to the first sun gear; and a second motor/generator directly connected to the second sun gear.
    Type: Grant
    Filed: December 2, 2013
    Date of Patent: December 23, 2014
    Assignee: Hyundai Motor Company
    Inventors: Woulsun Choi, Jae Young Choi, Seok Joon Kim
  • Power transmission system of hybrid electric vehicle
    Patent number: 8894527
    Abstract: A power transmission system of a hybrid electric vehicle may include an input shaft receiving engine torque, a first planetary gear set disposed on the input shaft, and including a first sun gear selectively connected to a transmission housing, a first ring gear, and a first planet carrier directly connected to the input shaft, a second planetary gear set disposed on the input shaft, and including a second sun gear, a second ring gear directly connected to the first ring gear and directly connected to an output gear, and a second planet carrier selectively connected to the first planet carrier and selectively connected to the transmission housing, a first motor/generator directly connected to the first sun gear, and a second motor/generator directly connected to the second sun gear.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: November 25, 2014
    Assignee: Hyundai Motor Company
    Inventors: Woulsun Choi, Jae Young Choi, Seok Joon Kim
  • POWER TRANSMISSION SYSTEM OF HYBRID ELECTRIC VEHICLE
    Publication number: 20140162823
    Abstract: A power transmission system of a hybrid electric vehicle may include an input shaft receiving engine torque, a first planetary gear set disposed on the input shaft, and including a first sun gear selectively connected to a transmission housing, a first ring gear, and a first planet carrier directly connected to the input shaft, a second planetary gear set disposed on the input shaft, and including a second sun gear, a second ring gear directly connected to the first ring gear and directly connected to an output gear, and a second planet carrier selectively connected to the first planet carrier and selectively connected to the transmission housing, a first motor/generator directly connected to the first sun gear, and a second motor/generator directly connected to the second sun gear.
    Type: Application
    Filed: November 25, 2013
    Publication date: June 12, 2014
    Applicant: Hyundai Motor Company
    Inventors: Woulsun CHOI, Jae Young Choi, Seok Joon Kim
  • POWER TRANSMISSION SYSTEM OF HYBRID ELECTRIC VEHICLE
    Publication number: 20140162824
    Abstract: A power transmission system may include: an input shaft receiving engine torque; a first planetary gear set disposed on the input shaft and including a first sun gear selectively connected to a transmission housing, a first ring gear directly connected to the input shaft, and a first planet carrier; a second planetary gear set disposed on the input shaft and including a second sun gear, a second ring gear selectively connected to the first ring gear and selectively connected to the transmission housing, and a second planet carrier directly connected to the first planet carrier and directly connected to an output gear; a first motor/generator directly connected to the first sun gear; and a second motor/generator directly connected to the second sun gear.
    Type: Application
    Filed: December 2, 2013
    Publication date: June 12, 2014
    Applicant: Hyundai Motor Company
    Inventors: Woulsun CHOI, Jae Young Choi, Seok Joon Kim