Title:
DIAGNOSTIC DEVICE FOR AUTOMATIC TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2021/006086
Kind Code:
A1
Abstract:
In the present invention, a transmission control unit (10) comprises a selection operation time control unit (100) and a mis-coupling diagnosis control unit (101). The selection operation time control unit (100), when there is a selection operation from the D range or the R range to the N range, puts all friction elements into a released state and then, when vehicle speed (VSP) falls below a prescribed level, puts one of three friction elements that are coupled when transitioning to a prescribed gear stage into a released state and puts the other two friction elements into a coupled state. The mis-coupling diagnosis control unit (101), before all of the friction elements are put into a released state, outputs a release instruction to one friction element, confirms a change in the rotational rate of a transmission input shaft after the release instruction has been output, and, if there is no change in a turbine rotational rate (Nt), reaches a diagnosis that the friction element instructed for release is in a mis-coupled state where the friction element cannot be released.
Inventors:
AMANO NORIHIRA (JP)
HAMANO MASAHIRO (JP)
HAMANO MASAHIRO (JP)
Application Number:
PCT/JP2020/025450
Publication Date:
January 14, 2021
Filing Date:
June 29, 2020
Export Citation:
Assignee:
JATCO LTD (JP)
NISSAN MOTOR (JP)
NISSAN MOTOR (JP)
International Classes:
F16H59/08; B60W10/04; B60W10/06; B60W10/11; F16H59/40; F16H59/42; F16H59/68; F16H61/12; F16H61/686; F16H63/50
Foreign References:
| JP2018204728A | 2018-12-27 | |||
| JP2016031093A | 2016-03-07 | |||
| JP2005273805A | 2005-10-06 | |||
| JP2013071499A | 2013-04-22 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
Download PDF:
Previous Patent: PHENOLIC RESIN COMPOSITION, METHOD FOR PRODUCING PHENOLIC RESIN COMPOSITION, AND RUBBER PRODUCT
Next Patent: SHOCK ABSORBER
Next Patent: SHOCK ABSORBER