Title:
【発明の名称】自動変速機の変速制御装置
Document Type and Number:
Japanese Patent JP2850615
Kind Code:
B2
Abstract:
A shift control system in an automatic transmission controls a shifting which necessitates redeployment of friction elements so that one friction element is engaged while the other friction element is released. In reply to a shift command, the shift control system starts to control one of the engagement pressure of the friction element to be engaged or the disengagement pressure of the friction element to be disengaged. Next, the shift control system starts to control the other one of the engagement pressure or the disengagement pressure at a moment at which a preset time has elapsed from the start of the shift command. The preset time is corrected so as to decrease a physical quantity indicative of discord of the timing between the engagement and the disengagement. Accordingly, the preset time firmly takes a proper time so as to carry out the deployment of both friction elements at a synchronized point due to such a learning control. This enables the shift feeling to always be kept good.
Inventors:
WAKAHARA TATSUO
YAMAMOTO MASAHIRO
YAMAMOTO MASAHIRO
Application Number:
JP77892A
Publication Date:
January 27, 1999
Filing Date:
January 07, 1992
Export Citation:
Assignee:
NITSUSAN JIDOSHA KK
International Classes:
F16H61/06; F16H61/08; F16H61/10; F16H61/18; F16H59/16; F16H59/36; F16H59/46; F16H59/72; F16H61/00; (IPC1-7): F16H61/08
Domestic Patent References:
| JP3186651A | ||||
| JP6396345A | ||||
| JP6288858A |
Attorney, Agent or Firm:
Akihide Sugimura (5 outside)