HYDRAULIC CONTROL DEVICE AND HYDRAULIC CONTROL METHOD
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United States of America Patent
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Issued Date -
Jan 7, 2016
app pub date -
Mar 27, 2014
filing date -
Mar 29, 2013
priority date (Note) -
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Abstract
A hydraulic control device that includes a pressure regulating valve capable of regulating a source pressure to generate a control pressure higher than the oil pressure in the circulation oil chamber and supplying the control pressure to the engagement port, wherein when disengaging the lockup clutch, the hydraulic oil is circulated in the circulation oil chamber via the circulation input port and the circulation output port, and part of the hydraulic oil circulated in the circulation oil chamber is supplied to the engagement port, and when engaging the lockup clutch, the supply of the hydraulic oil circulated in the circulation oil chamber to the engagement port is cut off, and the control pressure is supplied to the engagement port.
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