Control device of electric vehicle

A control system of an electric vehicle including a transmission provided on a driving power transmission path through which a driving power is transmitted from an electric motor to a drive wheel, the control system comprising:

• a control device configured to execute:
• a torque setting section for setting a target output torque of the electric motor based on a driving state including an accelerator operation amount;
• a non-transmission state determiner section for determining whether the driving power transmission path is in a non-transmission state in which the driving power is not permitted to be transmitted from the electric motor to the drive wheel or in a transmission state in which the driving power is permitted to be transmitted from the electric motor to the drive wheel;
• and
• a torque compensation section for compensating the target output torque set by the torque setting section, by using a slowness characteristic in which a change in a motor rotational speed which occurs with time is slower, in a state in which the driving power transmission path is in the non-transmission state, than in a state in which the driving power transmission path is in the transmission state, when the non-transmission state determiner section determines that the driving power transmission path is in the non-transmission state,
• wherein the torque setting section, the non-transmission state determiner section, and the torque compensation section are software programs executed by the control device, and
• wherein the torque compensation section compensates the target output torque in such a manner that a value is multiplied by a coefficient of a positive value which is smaller than 1.

A control system of an electric vehicle including a transmission provided on a driving power transmission path through which a driving power is transmitted from an electric motor to a drive wheel, the control system comprising:

• a control device configured to execute:
• a torque setting section capable of setting target output torque of the electric motor based on a driving state including an accelerator operation amount;
• a non-transmission state determiner section capable of determining whether the driving power transmission path is in a non-transmission state in which the driving power is not permitted to be transmitted from the electric motor to the drive wheel or in a transmission state in which the driving power is permitted to be transmitted from the electric motor to the drive wheel;
• and
• a torque compensation section capable of compensating the target output torque set by the torque setting section, by using a slowness characteristic in which a change in a motor rotational speed which occurs with time is slower, in a state in which the driving power transmission path is in the non-transmission state, than in a state in which the driving power transmission path is in the transmission state, when the non-transmission state determiner section determines that the driving power transmission path is in the non-transmission state,
• wherein the torque setting section, the non-transmission state determiner section, and the torque compensation section are software programs executed by the control device, and
• wherein the torque compensation section compensates the target output torque in such a manner that a degree of slowness is decreased with an increase in the motor rotational speed of the electric motor.

A method of controlling an electric vehicle including a transmission provided on a driving power transmission path through which a driving power is transmitted from an electric motor to a drive wheel, the method comprising:

• setting target output torque of the electric motor based on a driving state including an accelerator operation amount;
• determining whether the driving power transmission path is in a non-transmission state in which the driving power is not permitted to be transmitted from the electric motor to the drive wheel or in a transmission state in which the driving power is permitted to be transmitted from the electric motor to the drive wheel;
• and
• compensating the target output torque set in the setting of the target output torque, by using a slowness characteristic in which a change in a motor rotational speed which occurs with time is slower, in a state in which the driving power transmission path is in the non-transmission state, than in a state in which the driving power transmission path is in the transmission state, when it is determined that the driving power transmission path is in the non-transmission state,
• wherein the torque compensation section compensates the target output torque in such a manner that a degree of slowness is decreased with an increase in the motor rotational speed of the electric motor.

A method of controlling an electric vehicle including a transmission provided on a driving power transmission path through which a driving power is transmitted from an electric motor to a drive wheel, the method comprising:

• setting target output torque of the electric motor based on a driving state including an accelerator operation amount;
• determining whether the driving power transmission path is in a non-transmission state in which the driving power is not permitted to be transmitted from the electric motor to the drive wheel or in a transmission state in which the driving power is permitted to be transmitted from the electric motor to the drive wheel;
• and
• compensating the target output torque set in the setting of the target output torque, by using a slowness characteristic in which a change in a motor rotational speed which occurs with time is slower, in a state in which the driving power transmission path is in the non-transmission state, than in a state in which the driving power transmission path is in the transmission state, when it is determined that the driving power transmission path is in the non-transmission state,
• wherein in the compensating of the target output torque, the target output torque is compensated in such a manner that a value is multiplied by a coefficient of a positive value which is smaller than 1.