Title:
流体伝動装置の油圧制御装置
Document Type and Number:
Japanese Patent JP5233884
Kind Code:
B2
Abstract:
A hydraulic pressure control apparatus for a torque converter includes a relay valve switching levels of a hydraulic pressure in the hydraulic power transmission chamber and establishing selective connections between a cooler and the hydraulic power transmission chamber or between the cooler and a hydraulic pressure supply source of which a flow amount of the operational fluid is regulated by a first orifice, an electronic control unit controlling operations of the relay valve, a hydraulic pressure declination determining portion judging whether the hydraulic pressure of the hydraulic pressure supply source is lower than a threshold value based on a predetermined vehicle state, and a switching command outputting portion outputting a command to connect the cooler and the hydraulic pressure supply source by the relay valve when the hydraulic pressure declination determining portion determines that the hydraulic pressure of the hydraulic pressure supply source is lower than the threshold value.
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Inventors:
Osamu Sakamoto
Application Number:
JP2009167805A
Publication Date:
July 10, 2013
Filing Date:
July 16, 2009
Export Citation:
Assignee:
Aisin Seiki Co., Ltd.
International Classes:
F16H61/02; F16H61/00; F16H61/14
Domestic Patent References:
| JP5118424A | ||||
| JP8014381A | ||||
| JP1208233A | ||||
| JP2003287124A | ||||
| JP63246560A | ||||
| JP3204472A | ||||
| JP2002266993A | ||||
| JP2007155081A |
Attorney, Agent or Firm:
Kato Asamichi