Hydraulic control device for starting device
AssigneeAisin Aw Co., Ltd.
InventorsKazuyuki Noda, Yuichiro Umemoto
Life of this patent
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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.
Claims4
A hydraulic control device for a starting device, the hydraulic control device comprising:
- a first oil path that inputs an internal pressure to the starting device that includes a clutch;
- a second oil path that discharges the internal pressure;
- a third oil path that inputs an engagement pressure of the clutch;
- an engagement pressure generation unit that outputs the engagement pressure of the clutch to the third oil path;
- a signal pressure generation unit that outputs a signal pressure when the engagement pressure is not inputted, and outputs no signal pressure when the engagement pressure is inputted;
- 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.
Dependencies are inferred from the claim text.