Hydraulic control device for starting device

Details Hydraulic control device for starting device Hydraulic control device for starting device

2009-03-17

2011-11-29

Wright, Dirk (Department: 3655)

Interrelated power delivery controls, including engine control

Clutch control

With fluid drive

C192S003300, C192S085630

Reexamination Certificate

active

08066618

ABSTRACT:
A hydraulic control device includes a first oil path; a second oil path; a third oil path; an engagement pressure generation unit; a signal pressure generation unit; and an internal pressure switching unit that switches between a non-reduced pressure state where locking occurs due to the signal pressure inputted and a source pressure is outputted unchanged as internal pressure to the first oil path, and a reduced pressure state where the signal pressure is not inputted and a hydraulic pressure is regulated to a constant pressure from the source pressure, based on a feedback pressure of the internal pressure and an urging force of a first urging unit, and outputted as the internal pressure to the first oil path.

REFERENCES:
patent: 6474456 (2002-11-01), Suzuki et al.
patent: 6662918 (2003-12-01), Takeuchi et al.
patent: 7611002 (2009-11-01), Gierer et al.
patent: 2006/0032720 (2006-02-01), Ando et al.
patent: A-2-261964 (1990-10-01), None
patent: A-8-338523 (1996-12-01), None
patent: A-2001-173764 (2001-06-01), None

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