Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1991-08-28
1993-01-05
Wright, Dirk
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74844, F16H 6106
Patent
active
051760460
ABSTRACT:
A control system for an automatic transmission has a shift gear mechanism with a plurality of frictional elements, including a low reverse brake which is selectively actuated for switching a power transmitting path to establish a desired shift stage. A hydraulic control circuit controls supply of a hydraulic fluid to and relief of the fluid from an actuator for the frictional element. An accumulator is provided in a hydraulic passage communicated with the low reverse brake for obviating a shock as the low reverse brake is engaged. Back pressure of the accumulator is controlled when a first shift gear stage is established through the engagement of the low reverse brake. A torque shock can be suppressed when the first stage is established in an L-range.
REFERENCES:
patent: 4722250 (1988-02-01), Sumiya et al.
patent: 4930376 (1990-06-01), Van Selous
patent: 4955256 (1990-09-01), Kashihara et al.
patent: 4987982 (1991-01-01), Yamaguchi
patent: 5005443 (1991-04-01), Sugano
Baba Fumiaki
Fujiwara Takuji
Kamada Shinya
Kitada Masahito
Mizobe Tatsutoshi
Mazda Motor Corporation
Wright Dirk
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