Automatic transmission, control method for automatic transmission, and non-transitory computer-readable medium
AssigneesJATCO Ltd, Nissan Motor Co., Ltd.
InventorKazue Shimokawara
Life of this patent
Estimating the term…
Abstract
[PROBLEMS] To reduce a sense of discomfort given to a driver due to vehicle deceleration caused by a downshift that is not intended by the driver, which is caused by a failure of a rotation speed sensor or the like. [SOLUTIONS] An automatic transmission includes: a transmission mechanism configured to shift rotation of a driving source and transmit the rotation to a driving wheel; and a clutch configured to control transmission of a torque from the driving source to the driving wheel, wherein when a change rate of a rotation speed of the driving source is equal to or higher than a predetermined change rate, a torque transmission capacity of the clutch is reduced.
Claims8
An automatic transmission, comprising:
- a transmission mechanism configured to shift rotation of a driving source and transmit the rotation to a driving wheel;
- and
- a clutch configured to control transmission of a torque from the driving source to the driving wheel, wherein
- when a selected operation mode is a forward mode and a change rate at which a rotation speed of the driving source increases is equal to or higher than a predetermined change rate, a torque transmission capacity of the clutch is reduced, and a braking force transmitted from the driving source to the driving wheel is reduced.
A control method for an automatic transmission including a transmission mechanism configured to shift rotation of a driving source and transmit the rotation to a driving wheel, and a clutch configured to control transmission of a torque from the driving source to the driving wheel, the control method comprising:
- reducing a torque transmission capacity of the clutch to reduce a braking force transmitted from the driving source to the driving wheel when a selected operation mode is a forward mode and a change rate at which a rotation speed of the driving source increases is equal to or higher than a predetermined rate.
A non-transitory computer-readable medium storing program executable by a computer of an automatic transmission including a transmission mechanism configured to shift rotation of a driving source and transmit the rotation to a driving wheel, and a clutch configured to control transmission of a torque from the driving source to the driving wheel, wherein
- the program causes the computer to execute instructions for:
- reducing a torque transmission capacity of the clutch to reduce a braking force transmitted from the driving source to the driving wheel when a selected operation mode is a forward mode and a change rate at which a rotation speed of the driving source increases is equal to or higher than a predetermined rate.
Dependencies are inferred from the claim text.