Shift shock reducing apparatus for power train
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United States of America Patent
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Apr 13, 2010
Grant Date -
Feb 28, 2008
app pub date -
Aug 8, 2007
filing date -
Aug 28, 2006
priority date (Note) -
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Abstract
A shift shock reducing apparatus for a power train having an engine and an automatic transmission having a frictional element that is to be engaged at upshift, comprising a control section that executes, during upshift, a torque down of the engine that starts before the start of an inertia phase in which a gear ratio of the transmission is changing from a before-shift gear ratio to an after-shift gear ratio, and a control section that makes larger a rising gradient of working oil pressure that is supplied to the frictional element to be engaged at upshift when the torque down that starts before the start of the inertia phase is executed than that when the torque down is not executed.
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