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US 5,580,331 AGranted
Control device and method for automatic transmission
AssigneeHitachi, Ltd.
InventorsTakashi Shiraishi, Naoyuki Ozaki, Toshimichi Minowa, Hiroshi Kimura
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AssigneeHitachi, Ltd.
InventorsTakashi Shiraishi, Naoyuki Ozaki, Toshimichi Minowa, Hiroshi Kimura
Estimating the term…
In an attempt to accomplish an object to absorb a driving torque difference caused by a difference in a change gear ratio between before and after shifting and to reduce a shift shock, adopted is such a constitution that target driving torque characteristics with which said driving torque before and after shifting will become nearly equal are stored, and engine torque control will be effected according to said characteristics. The control device is so constituted that, during shifting, the engine torque is decreased to suppress a driving torque variation resulting from inertia variation, and the engine torque before a specific period from the completion of shifting is outputted higher than the normal torque, and the engine torque before a specific period from the completion of shifting is outputted higher than the normal torque to reset to the normal engine torque after the specific period after the completion of shifting.
A control device for an automatic transmission of a vehicle having a control means for controlling an engine torque and a transmission control means for controlling said automatic transmission, said control device utilizing a targeted engine torque as a function of a targeted driving torque and a torque converter characteristic, and comprising:
A control device for an automatic transmission of a vehicle having a control means for controlling an engine torque, a transmission control means for controlling said automatic transmission, and a means for decreasing said engine torque during shifting to reduce a shift shock, said control device utilizing a targeted engine torque as a function of a targeted driving torque and a torque converter characteristic, and comprising:
A control device for an automatic transmission of a vehicle having a control means for controlling an engine torque, a transmission control means for controlling said automatic transmission, and a means for decreasing said engine torque during shifting to reduce a shift shock, said control device utilizing a targeted engine torque as a function of a targeted driving torque and a torque converter characteristic, and comprising:
Dependencies are inferred from the claim text.