Method for speed stage shifting of automatic transmission with i

Details Method for speed stage shifting of automatic transmission with i Method for speed stage shifting of automatic transmission with i

1991-10-18

1992-06-30

Wright, Dirk

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

F16H 6106

Patent

active

051252953

ABSTRACT:
In a speed stage shifting of an automatic transmission in a vehicle by engagement of a hydraulically operated friction engaging means through supply of a hydraulic fluid to the friction engaging means via a passage means including an accumulator operative with support by a back pressure, the back pressure is first maintained at an incipient pressure level, and is increased from the incipient pressure level toward a regular pressure level upon the lapse of a delay time from the detection of a transition phase when the transition phase starts before the lapse of a guard time or upon the lapse of the guard time when the guard time lapses before the start of the transition phase.

REFERENCES:
patent: 4882952 (1989-11-01), Kashihara et al.
patent: 4889016 (1989-12-01), Kuwayama et al.
patent: 4930375 (1990-06-01), Yamamoto et al.
patent: 4942787 (1990-07-01), Aoki et al.
patent: 4944202 (1990-07-01), Gierer
patent: 4955256 (1990-09-01), Kashihara et al.

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