US 11,808,349 B2
Control device and control method for automatic transmission, and non-transitory computer-readable medium
Takuya Takamura, Fuji (JP)
Assigned to JATCO LTD, Fuji (JP); and NISSAN MOTOR CO., LTD., Yokohama (JP)
Appl. No. 17/639,216
Filed by JATCO Ltd, Fuji (JP); and NISSAN MOTOR CO., LTD., Yokohama (JP)
PCT Filed Oct. 2, 2020, PCT No. PCT/JP2020/037630
§ 371(c)(1), (2) Date Feb. 28, 2022,
PCT Pub. No. WO2021/070759, PCT Pub. Date Apr. 15, 2021.
Claims priority of application No. 2019-185706 (JP), filed on Oct. 9, 2019.
Prior Publication US 2022/0299109 A1, Sep. 22, 2022
Int. Cl. F16H 59/70 (2006.01); F16H 61/30 (2006.01); F16H 61/686 (2006.01); F16H 61/28 (2006.01)
CPC F16H 61/30 (2013.01) [F16H 59/70 (2013.01); F16H 61/686 (2013.01); F16H 2059/706 (2013.01); F16H 2061/2853 (2013.01)] 9 Claims
OG exemplary drawing
 
1. 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.