Hydraulic control apparatus for automatic transmission, and...

Details Hydraulic control apparatus for automatic transmission, and... Hydraulic control apparatus for automatic transmission, and...

2011-03-15

2011-03-15

Ho, Ha D. (Department: 3655)

Planetary gear transmission systems or components

Input from independent power sources

Including electric motor input

C475S120000, C475S122000

Reexamination Certificate

active

07905807

ABSTRACT:
A hydraulic control apparatus includes a switching device that switches between a hydraulic servo of the plurality of hydraulic servos of the first friction engaging element and a hydraulic servo of the plurality of hydraulic servos of the second friction engaging element so as to supply a control pressure from the one pressure regulating solenoid valve to each of the plurality of hydraulic servos, wherein the switching enables a control of an engagement and disengagement of the first friction engaging element and the second friction engagement element using the one pressure regulating solenoid valve.

REFERENCES:
patent: 4616531 (1986-10-01), Ogasawara et al.
patent: 5027676 (1991-07-01), Fujiwara et al.
patent: 5038637 (1991-08-01), Sugano
patent: 5311795 (1994-05-01), Yoshimura et al.
patent: 5803866 (1998-09-01), Tsukamoto et al.
patent: 7261659 (2007-08-01), Raghavan et al.
patent: 2002/0025886 (2002-02-01), Itou et al.
patent: A-2001-343067 (2001-12-01), None

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