Control apparatus for hydraulically operated vehicular transmiss

Details Control apparatus for hydraulically operated vehicular transmiss Control apparatus for hydraulically operated vehicular transmiss

1998-08-05

2000-02-15

Wright, Dirk

Planetary gear transmission systems or components

Fluid drive or control of planetary gearing

Fluid controlled mechanical clutch or brake

475128, F16H 6100

Patent

active

060246634

ABSTRACT:
Measurement is made of a time of lapse from the time at which the hydraulic pressure of the hydraulic engaging element on engaging side to be engaged at the time of speed changing has increased to a predetermined pressure. Even if an input and output speed ratio of the transmission does not fall within a predetermined range, i.e., a range between YG(N+1)L and YG(N+1)H, which serves as a basis for judging whether the speed changing has been completed or not, a processing of speed change completion is performed when the above-described value TMSTB-TM has reached a predetermined value YTMUP4, to boost the ON pressure to the line pressure.

REFERENCES:
patent: 4722247 (1988-02-01), Shindo et al.
patent: 5303614 (1994-04-01), Sakaki et al.
patent: 5390566 (1995-02-01), Kimura et al.
patent: 5547437 (1996-08-01), Kamada et al.
patent: 5551930 (1996-09-01), Creger et al.
patent: 5788603 (1998-08-01), Tsutsui et al.
patent: 5800308 (1998-09-01), Tsutsui et al.

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