Title:
CONTROL DEVICE FOR AUTOMATIC TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2020/031677
Kind Code:
A1
Abstract:
This control device for automatic transmission (3) comprises an AT control unit (10) which has a solenoid fault diagnosis unit (10a) and a failsafe control unit (10b). When 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 first fault mode if the actual current is at or below a clutch slip threshold value, and a diagnoses a second fault mode if the actual current exceeds the clutch slip threshold value. If the first fault mode is diagnosed the failsafe control unit (10b) shifts to a gear which does not use the abnormal clutch solenoid diagnosed to be faulty, and if the second fault mode is diagnosed, limits the input torque to the automatic transmission.
Inventors:
HAMANO MASAHIRO (JP)
OKUMURA KUNIHIKO (JP)
OKUMURA KUNIHIKO (JP)
Application Number:
PCT/JP2019/028735
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
Domestic Patent References:
| WO2016152329A1 | 2016-09-29 | |||
| WO2012133773A1 | 2012-10-04 |
Foreign References:
| JP2006300284A | 2006-11-02 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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