Automobile and control method for automobile
AssigneesToyota Jidosha Kabushiki Kaisha, Aisin Aw Co., Ltd.
InventorsYukimasa Nishimura, Yoshizo Akita, Tadaaki Watanabe
Life of this patent
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Abstract
An electronic control unit controls a motor so that a torque applied to an input shaft does not exceed an upper limit torque. The electronic control unit sets so as to restrict the upper limit torque from a first torque to a second torque smaller than the first torque, and then return the upper limit torque to the first torque more gradually when a first condition that a driver is assumed to have felt a decrease in driving force output to driving wheels is met before the upper limit torque is returned than when the first condition is not met.
Claims12
An automobile, comprising:
- a motor;
- a transmission including an input shaft connected to the motor and an output shaft coupled to driving wheels, the transmission being configured to transmit power, and the transmission being configured to change shift gears between the input shaft and the output shaft;
- and
- an electronic control unit being configured to control the motor and the transmission,
- the electronic control unit being configured to control the motor such that a torque applied to the input shaft does not exceed an upper limit torque,
- the electronic control unit being configured to set so as to restrict the upper limit torque from a first torque to a second torque smaller than the first torque, and
- the electronic control unit being configured to set so as to return the upper limit torque from the second torque to the first torque at a relatively slower rate of increase of the upper limit torque when a first condition is met before the upper limit torque is returned to the first torque as compared to a relatively higher rate of increase of the upper limit torque when the first condition is not met before the upper limit torque is returned to the first torque, the first condition being a condition that a driver is assumed to have felt a decrease in driving force output to the driving wheels.
A control method for an automobile,
- the automobile including:
- a motor;
- a transmission including an input shaft connected to the motor and an output shaft coupled to driving wheels, the transmission being configured to transmit power, and the transmission being configured to change shift gears between the input shaft and the output shaft;
- and
- an electronic control unit is configured to control the motor and the transmission, the electronic control unit is configured to control the motor such that a torque applied to the input shaft does not exceed an upper limit torque,
- the control method comprising:
- setting, by the electronic control unit, so as to restrict the upper limit torque from a first torque to a second torque smaller than the first torque;
- and
- setting, by the electronic control unit, so as to return the upper limit torque from the second torque to the first torque at a relatively slower rate of increase of the upper limit torque when a first condition is met before the upper limit torque is returned to the first torque as compared to a relatively higher rate of increase of the upper limit torque when the first condition is not met before the upper limit torque is returned to the first torque, the first condition being a condition that a driver is assumed to have felt a decrease in driving force output to the driving wheels.
Dependencies are inferred from the claim text.