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Automatic transmission, control method of automatic transmission, vehicle and control method of vehicle

  • US 10,330,192 B2
  • Filed: 02/27/2017
  • Issued: 06/25/2019
  • Est. Priority Date: 02/29/2016
  • Status: Active Grant
First Claim
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1. An automatic transmission comprising:

  • a first transmission mechanism to which a driving force of a driving source is input through a first clutch and which is configured to switch driving force transmission paths to an output member to establish a first set of gear ratios;

    a second transmission mechanism to which the driving force of the driving source is input through a second clutch and which is configured to switch driving force transmission paths to the output member to establish a second set of gear ratios; and

    a control unit,wherein a one-way clutch is provided in a driving force transmission path that establishes a first certain gear ratio in the first set,the first transmission mechanism comprises;

    an input shaft to which the driving force of the driving source is input through the first clutch;

    a first transmission gear provided on the input shaft and configured to establish the first certain gear ratio;

    a plurality of second transmission gears provided on the input shaft and configured to establish remaining gear ratios in the first set; and

    a switching mechanism configured to perform engagement and disengagement between the input shaft and the plurality of second transmission gears,a driving transmission direction of the one-way clutch is set such that a rotation inputted from a wheel side to the output member in a predetermined rotational direction is transmitted to the input shaft, the predetermined rotational direction corresponding to a backward movement of a vehicle, andwhen disengagement by the switching mechanism is impossible, the control unit can execute recovery control to enable the disengagement on condition that a driver performs a predetermined operation.

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