| 主权项 |
1. A gear ratio control device comprising:
a controller configured to control a gear ratio in a vehicle including a continuously variable transmission having a four-bar linkage mechanism, the continuously variable transmission including
an input shaft to rotate on an input center axial line by receiving rotational force from a power source,eccentric discs each having a first supporting point of which eccentricity as to the input center axial line is changeable as a center of the eccentric disc, each of the eccentric discs being rotatable around the input center axial line while maintaining the eccentricity,a one-way clutch including
an output member to rotate around an output center axial line which is distanced from the input center axial line,an input member to oscillate around the output center axial line by receiving external rotational force, andan engaging member to place the input member and the output member into a mutually locked state or unlocked state,the one-way clutch being configured so that, in the event that a positive rotational speed of the input member exceeds a positive rotational speed of the output member, the rotational force input to the input member is transmitted to the output member, to convert oscillating motion of the input member into a rotational motion of the output member,linking members each including
a first end rotatably linked to a perimeter of the eccentric disc centered on the first supporting point, anda second end rotatably linked to a second supporting point provided on the input member of the one-way clutch at a position distanced from the output center axial line, so that rotational motion provided from the input shaft to the eccentric discs is transmitted to the input member of the one-way clutch as oscillating motion of the input member, anda variable gear ratio mechanism including
an actuator to change an oscillation angle of oscillating motion transmitted from the eccentric discs to the input member of the one-way clutch by adjusting the eccentricity of the first supporting points as to the input center axial line, the continuously variable transmission being provided to change the gear ratio at the time of the rotational force input to the input shaft being transmitted as rotational force to the output member of the one-way clutch via the eccentric discs and the linking members, the variable gear ratio mechanism being configured so that the eccentricity can be set to zero, to enable the gear ratio to be set to approach infinity, the controller being configured to start to adjust the eccentricity so that, in the event of starting the power source in a state in which the power source is stopped and the vehicle is traveling, the gear ratio at the continuously variable transmission is at a target value at the same time as performing start control of the power source, and the controller adjusts the eccentricity so that the gear ratio reaches the target value before revolutions of the power source reach target revolutions according to a requested output to the power source. |
