Control device and control method for automatic transmission, and non-transitory computer-readable medium
AssigneesJATCO Ltd, Nissan Motor Co., Ltd.
InventorTakuya Takamura
Life of this patent
Estimating the term…
Abstract
The control device is configured to supply an offset current value to disengagement solenoids of disengagement-side friction engaging elements among a plurality of shift solenoids that control respective shift oil pressures applied to the plurality of friction engaging elements, and when a current gear position is a first speed position or a reverse position, decrease a current value to be supplied to at least one of the disengagement solenoids that are supplied with the offset current value to be lower than the offset current value.
Claims9
A control device for an automatic transmission, the control device controlling an engagement/disengagement state of each of a plurality of friction engaging elements, so as to set a plurality of gear positions, wherein
- the control device is configured to:
- supply an offset current value to disengagement solenoids of disengagement-side friction engaging elements among a plurality of shift solenoids that control respective shift oil pressures applied to the plurality of friction engaging elements, and
- when a current gear position is a first speed position or a reverse position, decrease a current value to be supplied to at least one of the disengagement solenoids that are supplied with the offset current value to be lower than the offset current value.
A control method for an automatic transmission, the control method being for controlling an engagement/disengagement state of each of a plurality of friction engaging elements so as to set a plurality of gear positions, the control method comprising:
- supplying an offset current value to disengagement solenoids of disengagement-side friction engaging elements among a plurality of shift solenoids that control respective shift oil pressures applied to the plurality of friction engaging elements;
- and
- decreasing, when a current gear position is a first speed position or a reverse position, a current value to be supplied to at least one of the disengagement solenoids that are supplied with the offset current value to be lower than the offset current value.
A non-transitory computer-readable medium storing a program executable by a computer for an automatic transmission, the computer controlling an engagement/disengagement state of each of a plurality of friction engaging elements, so as to set a plurality of gear positions, the program causing the computer to execute:
- supplying an offset current value to disengagement solenoids of disengagement-side friction engaging elements among a plurality of shift solenoids that control respective shift oil pressures applied to the plurality of friction engaging elements, and
- when a current gear position is a first speed position or a reverse position, decreasing a current value to be supplied to at least one of the disengagement solenoids that are supplied with the offset current value to be lower than the offset current value.
Dependencies are inferred from the claim text.