Controller of stepped automatic transmission
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United States of America Patent
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Oct 21, 2014
Grant Date -
Apr 17, 2014
app pub date -
Feb 16, 2012
filing date -
Jun 1, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Disclosed is a controller of a stepped automatic transmission. The stepped automatic transmission has a plurality of lock-up elements and performs downshift during coasting while an engine has a fuel cut-off state by changing over a pair of lock-up elements including an open side lock-up element and a lock-up side lock-up element. Downshift operation includes torque phase control and inertia phase control. The controller includes: a fuel cut-off recovery executing unit that is configured to perform recovery from the fuel cut-off state for an inertia phase control period; and a cylinder number restricting unit that is configured to restrict a count of cylinders recovered from the fuel cut-off state.
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