Control apparatus for automatic transmission and control method for automatic transmission
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United States of America Patent
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Aug 27, 2019
Grant Date -
Jan 25, 2018
app pub date -
Jan 12, 2016
filing date -
Feb 5, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A control apparatus includes a select lever, an inhibitor switch, a manual valve, a first SOL, a second SOL, and a controller. The controller controls the first SOL and the second SOL such that a hydraulic pressure is supplied to a first friction element and a second friction element when the inhibitor switch detects a D range. The controller determines that an operation position is at an intermediate position when operations of the first friction element and the second friction element are not detected. The controller determines that the first SOL has a failure when the operation of the first friction element is not detected.
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