CONTROL DEVICE OF AUTOMATIC TRANSMISSION WHICH EXECUTES SHIFT-BY-WIRE CONTROL
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United States of America Patent
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N/A
Issued Date -
Mar 8, 2018
app pub date -
Aug 15, 2017
filing date -
Sep 6, 2016
priority date (Note) -
Published
status (Latency Note)
Importance
Abstract
A shift position determination portion determines that operation of shifting a shift position from other range than a parking range to the parking range is conducted. A parking lock command portion causes a piston to maintain a state of being mechanically locked at a second position when the shift position is shifted to the parking range. An actuator drive command portion commands an actuator to drive the piston from the second position to a first position in a state where the position of the piston is mechanically locked at the second position. A parking lock failure determination portion determines that the locking mechanism portion is in a failure in an unlocked state when the position of the piston goes out of the second position within a predetermined time after a command is issued.
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