Title:
CONTROL DEVICE FOR AUTOMATIC TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2020/031678
Kind Code:
A1
Abstract:
This control device for automatic transmission (3) comprises an AT control unit (10) having a solenoid fault diagnosis unit (10a), a drive force calculation unit (10b) and a failsafe control unit (10c). If the current differential obtained by subtracting the actual current from the command current to a clutch solenoid (20) is equal to or greater than a predetermined current, the solenoid fault diagnosis unit (10a) diagnoses a fault mode. If the fault mode is diagnosed, the drive force calculation unit (10b) calculates a first drive force (A) obtained when an input torque limit is assumed, and a second drive force (B) obtained when a transmission restriction is assumed. If the first drive force (A) is equal to or greater than the second drive force (B), the failsafe control unit (10c) selects an input torque limit, and if the first drive force (A) is less than the second drive force (B), selects transmission restriction.
Inventors:
HAMANO MASAHIRO (JP)
OKUMURA KUNIHIKO (JP)
OKUMURA KUNIHIKO (JP)
Application Number:
PCT/JP2019/028736
Publication Date:
February 13, 2020
Filing Date:
July 23, 2019
Export Citation:
Assignee:
JATCO LTD (JP)
NISSAN MOTOR (JP)
NISSAN MOTOR (JP)
International Classes:
F16H61/12; F16H61/68; F16H63/50
Foreign References:
| JP2013053732A | 2013-03-21 | |||
| JP2008038998A | 2008-02-21 | |||
| JPH094707A | 1997-01-07 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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