Patents Assigned to Toyota Jidosha Kabushiski Kaisha
  • Tire state judging device
    Patent number: 9409453
    Abstract: A tire state judging device includes wheel speed sensors configured to detect rotational speeds of tires, and a control unit configured to perform frequency-analysis of detection results of the wheel speed sensors to detect a frequency of a valley part of an output, and calculate an air pressure of the tire from the detected frequency of the valley part. According to this, the tire state judging device has an effect that this can detect a state of the tire irrespective of a state of a road surface.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: August 9, 2016
    Assignee: TOYOTA JIDOSHA KABUSHISKI KAISHA
    Inventor: Daigo Fujii
  • Planetary gear transmission for motor vehicle
    Patent number: 4963124
    Abstract: A vehicle transmission including a first, a second and a third planetary gear unit coaxially disposed between an input and an output member. The three units have respective first, second and third sun gears, respective first, second and third planetary gears, respective first, second and third carriers, and respective first, second and third ring gears. The first carrier, second ring gear, third sun gear and output members are connected to each other, while the second carrier and the third ring gear are connected to each other.
    Type: Grant
    Filed: October 6, 1989
    Date of Patent: October 16, 1990
    Assignee: Toyota Jidosha Kabushiski Kaisha
    Inventors: Tokuyuki Takahashi, Seitoku Kubo, Hiroshi Itoh, Masayuki Fukai