Speed change control unit of automatic transmission for automobi

Details Speed change control unit of automatic transmission for automobi Speed change control unit of automatic transmission for automobi

1982-10-18

1985-02-26

Braun, Leslie A.

Machine element or mechanism

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

Preselected indexed position

74752A, 74867, B60K 4122

Patent

active

045011753

ABSTRACT:
The present invention relates to an automatic transmission for automobiles wherein a plurality of transmission ratios are achieved through selective operations of a plurality of hydraulic servo means, and consists in a speed change control unit of an automatic transmission for automobiles wherein hydraulic transfer valves which are operated by oil pressures are arranged between a hydraulic source and hydraulic servos, and the hydraulic transfer valves as desired are operated by combinations of a plurality of oil chambers to be supplied with the pressure oil, thereby to selectively operate the predetermined servo means.

REFERENCES:
patent: 3570328 (1971-03-01), Kogaki
patent: 3650161 (1972-03-01), Ito et al.
patent: 3709064 (1973-01-01), Schaefer et al.
patent: 3797330 (1974-03-01), Ushijima
patent: 3823621 (1974-07-01), Kubo et al.
patent: 4076210 (1978-02-01), Spielvogel
patent: 4094211 (1978-06-01), Espenschied
patent: 4252148 (1981-02-01), Fochtman et al.
patent: 4308764 (1982-01-01), Kawamoto et al.
patent: 4331046 (1982-05-01), Leonard et al.
patent: 4349088 (1982-09-01), Ito et al.
patent: 4385531 (1983-05-01), Kobayashi et al.

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