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AssigneeToyota Jidosha Kabushiki Kaisha
InventorsMasato Watanabe, Masato Kaigawa, Ichiro Kitaori, Masakazu Owatari
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A control device for an automatic transmission is disclosed wherein a shift point depending on a variation in vehicle acceleration is modified on a real time basis in accordance with not only a corrected result on a shift point depending on piece-to-piece variations of automatic transmissions, but also actual acceleration for shortening a time required for learning with high precision with no need to be matched. Shift point real-time modifying means is provided for modifying the altered shift point based on a value of a ratio between a value of actual engine-rotation acceleration at an upshift-determining timing during a power-on running and a value of reference engine-rotation acceleration obtained by substituting a value of actual engine-rotation acceleration to a value for a reference running state having no impact on acceleration of a vehicle, and a target maximum engine rotation speed.
A control device for a vehicular automatic transmission of the type operative to initiate an upshifting output to allow a vehicle speed to pass across a predetermined shift point during a power on running, and to correct the shift point such that an estimated maximum engine rotation speed which is a maximum value of an engine rotation speed, increasing for a given time interval even after the upshifting output, approaches a target maximum engine rotation speed,
A control device for a vehicular automatic transmission of the type operative to initiate an upshifting output to allow a vehicle speed to pass across a predetermined shift point during a power on running, and to correct the shift point such that a maximum value of an engine rotation speed, increasing for a given time interval even after the upshifting output, approaches a target maximum engine rotation speed,
Dependencies are inferred from the claim text.