Automatic transmission
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 22, 2015
Grant Date -
Oct 9, 2014
app pub date -
Apr 8, 2014
filing date -
Apr 9, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An automatic transmission includes an input member, a planetary gear set, a plurality of engagement mechanisms, an output member, a shift position detecting unit, an input rotational speed detecting unit, a control unit, and a switching mechanism. When a shift position is changed from a forward drive range to a reverse drive range, the control unit performs a reverse preparation mode in which a rotational speed of an element to be fixed by the switching mechanism is lower than or equal to a predetermined speed by setting an engagement mechanism in one of a connection mode and a fixed mode. Upon performing the reverse preparation mode, the control unit engages the engagement mechanism that connects the element fixed by the switching mechanism to the input member and, thereafter, engages the engagement mechanism that makes the rotational speed of the input member lower than or equal to the predetermined speed.
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