Vehicle driving apparatus, and control methods thereof

A driving apparatus driving a drive shaft comprising:

• a motor configured to input and output power;
• a change speed transmission mechanism connected with a rotating shaft of the motor and with the drive shaft, and configured to change speed and transmit power between the rotating shaft and the drive shaft with a changeover of a change speed step by changing an engagement state of a plurality of hydraulic-driven clutches;
• and
• a controller configured to control the change speed transmission mechanism so as to change the change speed step into an instructed change speed step in response to an instruction to change the change speed step of the change speed transmission mechanism, the controller controlling the motor so as to output torque equivalent to sum of a drive torque based on a driving force demand required for the drive shaft and a suppressing vibration torque applied in a direction for suppressing rotational fluctuation contributing to vibration in the drive shaft at or before preset timing at or after a completion of an engagement preparation of at least one of the plurality of clutches that is to be changed from a release state to an engagement state during changing the change speed step to the instructed change speed step, the controller controlling the motor so as to output the drive torque based on the set driving force demand without the suppressing vibration torque after the preset timing.

A control method of a vehicle including a motor configured to input and output power, and a change speed transmission mechanism connected with a rotating shaft of the motor and with a drive shaft connected with an axle, and configured to change speed and transmit power between the rotating shaft and the drive shaft with a changeover of a change speed step by changing an engagement state of a plurality of hydraulic-driven clutches, the method comprising the steps of:

• setting a driving force demand required for driving the vehicle;
• and
• controlling the change speed transmission mechanism so as to change the change speed step into an instructed change speed step in response to an instruction to change the change speed step of the change speed transmission mechanism, controlling the motor so as to output torque equivalent to sum of a drive torque based on the set driving force demand and a suppressing vibration torque applied in a direction for suppressing rotational fluctuation contributing to vibration in the drive shaft at or before preset timing at or after a completion of an engagement preparation of at least one of the plurality of clutches that is to be changed from a release state to an engagement state during changing the change speed step to the instructed change speed step, and controlling the motor so as to output the drive torque based on the set driving force demand without the suppressing vibration torque after the preset timing.

A control method of a driving apparatus mounted on a vehicle and driving a drive shaft including a motor configured to input and output power, and a change speed transmission mechanism connected with a rotating shaft of the motor and with the drive shaft, and configured to change speed and transmit power between the rotating shaft and the drive shaft with a changeover of a change speed step by changing an engagement state of a plurality of hydraulic-driven clutches, the method comprising the step of:

• controlling the change speed transmission mechanism so as to change the change speed step into an instructed change speed step in response to an instruction to change the change speed step of the change speed transmission mechanism, controlling the motor so as to output torque equivalent to sum of a drive torque based on a driving force demand required for the drive shaft and a suppressing vibration torque applied in a direction for suppressing rotational fluctuation contributing to vibration in the drive shaft at or before preset timing at or after a completion of an engagement preparation of at least one of the plurality of clutches that is to be changed from a release state to an engagement state during changing the change speed step to the instructed change speed step, and controlling the motor so as to output the drive torque based on the set driving force demand without the suppressing vibration torque after the preset timing.