Hydraulic control device for automatic transmission
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United States of America Patent
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Nov 8, 2016
Grant Date -
Aug 20, 2015
app pub date -
Jan 21, 2015
filing date -
Feb 18, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A hydraulic control device for an automatic transmission includes a cut-off valve and a line pressure detector. The cut-off valve has a valve element located at one of a first position and a second position. The first position disables supply of a hydraulic fluid to a frictional engagement mechanism of the automatic transmission. The second position enables supply of the hydraulic fluid to the frictional engagement mechanism. The line pressure detector is configured to detect a line pressure. The cut-off valve is to control a hydraulic fluid passage so that the line pressure is supplied to the line pressure detector in a case where the valve element is at the first position and so that the line pressure is not supplied to the line pressure detector in a case where the valve element is at the second position.
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