Planetary gear transmission systems or components – Fluid drive or control of planetary gearing – Fluid controlled mechanical clutch or brake
Patent
1993-01-07
1994-12-27
Wright, Dirk
Planetary gear transmission systems or components
Fluid drive or control of planetary gearing
Fluid controlled mechanical clutch or brake
F16H 5942
Patent
active
053760565
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.
REFERENCES:
patent: 4790418 (1988-12-01), Brown et al.
patent: 4967385 (1990-10-01), Brekkestran et al.
patent: 4981053 (1991-01-01), Yamaguchi
patent: 4982621 (1991-01-01), Sano
patent: 5047936 (1991-09-01), Ishii et al.
patent: 5063814 (1991-11-01), Baba et al.
patent: 5123302 (1992-06-01), Brown et al.
patent: 5151858 (1992-09-01), Milunas et al.
patent: 5179875 (1993-01-01), Brown
patent: 5188005 (1993-02-01), Sankpal et al.
patent: 5213013 (1993-05-01), Fujiwara et al.
patent: 5231898 (1993-08-01), Okura
patent: 5241477 (1993-08-01), Narita
Maintenance Manual for NISSAN RE4F02A type Automatic, 1988.
Wakahara Tatsuo
Yamamoto Masahiro
Nissan Motor Co,. Ltd.
Wright Dirk
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