Control apparatus for automatic transmission
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United States of America Patent
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-
Nov 7, 2017
Issued Date -
N/A
app pub date -
Jul 13, 2015
filing date -
Jul 16, 2014
priority date (Note) -
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status (Latency Note)
Importance
Abstract
In an apparatus for controlling an automatic transmission connected to a prime mover mounted on a vehicle, having a torque converter equipped with a lock-up clutch, when predetermined operating conditions of the vehicle are satisfied at drive-off, a lock-up clutch engaging circuit is formed through a hydraulic supply circuit. Next it is determined whether engage-position sticking malfunction of the lock-up clutch has occurred based on a ratio of an input rotational speed of the automatic transmission relative to an output rotational speed of the prime mover and a change rate of the output rotational speed of the prime mover when the lock-up clutch engaging circuit has been formed, and fail-safe control is then implement when the sticking is determined.
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