Title:
AUTOMATIC TRANSMISSION AND CONTROL METHOD OF AUTOMATIC TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2020/217577
Kind Code:
A1
Abstract:
This automatic transmission comprises a controller which executes a smooth-off control for gradually reducing the engagement pressure Pc of a lockup clutch, when the output torque τ of an engine is a predetermined value τ1 or more, and a drive slip control for gradually increasing the engagement pressure Pc of the lock-up clutch after the smooth-off control is executed to bring the lock-up clutch into a predetermined slip state, and when a difference between the rotation speed Ntin on the input shaft side of the torque converter and the rotation speed Ntout on the output shaft side of the torque converter becomes a predetermined value D1 or more, the controller increases stepwise the instruction pressure Pt of the engagement pressure Pc of the lockup clutch by a predetermined amount P1 to shift from the smooth-off control to the drive slip control.
Inventors:
LIU PENG (JP)
SUWABE MASASHI (JP)
YAMADA TAKAHIRO (JP)
KOGUCHI TAKASHI (JP)
KIMURA KAZUNORI (JP)
SUWABE MASASHI (JP)
YAMADA TAKAHIRO (JP)
KOGUCHI TAKASHI (JP)
KIMURA KAZUNORI (JP)
Application Number:
PCT/JP2019/047894
Publication Date:
October 29, 2020
Filing Date:
December 06, 2019
Export Citation:
Assignee:
JATCO LTD (JP)
International Classes:
F16H61/02; F16H61/14
Domestic Patent References:
| WO2016158076A1 | 2016-10-06 |
Foreign References:
| JP2016048100A | 2016-04-07 | |||
| JPH08233098A | 1996-09-10 | |||
| JP2011213252A | 2011-10-27 |
Attorney, Agent or Firm:
GOTOH & PARTNERS (JP)
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