Control device and method for automatic transmission

A control device for an automatic transmission having a control means for controlling an engine torque, a transmission control means for controlling an 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 means for increasing said engine torque for a specific period before the completion of shifting greater than normal engine torque, and for resetting to a normal output said engine torque after a specific period after the completion of shifting.

A control device for an automatic transmission having a control means for controlling an engine torque, a transmission control means for controlling an automatic transmission, and a means for reducing an engine torque during shifting, said control device utilizing a targeted engine torque as a function of a targeted driving torque and a torque converter characteristic, and comprising:

• a means for setting a driving torque immediately before the start of shifting an a driving torque immediately after the completion of shifting to a nearly equal value, and a means for increasing said engine torque for a specific period before the completion of shifting greater than a normal engine torque, and for resetting said engine torque after a specific period after the completion of shifting to a normal output.

A control method for controlling an engine torque and operation of an automatic transmission, comprising the steps of setting a driving torque immediately before the start of shifting and a driving torque immediately after the completion of shifting to a nearly equal value based on a targeted engine torque as a function of a targeted driving torque and a torque converter characteristic, and restraining torque variation during shifting.

A control method for an automatic transmission for reducing a shift shock comprising the steps of controlling an engine torque by utilizing a targeted engine torque as a function of targeted driving torque and a torque converter characteristic, controlling operation of said automatic transmission, and deceasing said engine torque during shifting, increasing said engine torque for specific period before the completion of shifting greater than a normal engine torque, and resetting said engine torque after a specific period after the completion of shifting to a normal output.

A control method for an automatic transmission, comprising the steps of controlling an engine torque utilizing a targeted engine torque as a function of targeted driving torque and a torque converter characteristic, controlling operation of said automatic transmission, and for decreasing said engine torque during shifting for the purpose of reducing a shift shock, setting a driving torque immediately before the start of shifting and a driving torque immediately after the completion of shifting, increasing said engine torque for a specific period before the completion of shifting greater than a normal engine torque, and resetting said engine torque after a specific period upon completion of shifting to a normal output.