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The New Up-shift Control Technology has been developed for Automatic Transmissions, which uses integrated control of Engine and Automatic Transmissions. The control technology has improved shift shock and achieved shock less shifts. Additionally, the new Lexus LS460 is equipped with shift control technology, which contributes to the overall appeal of the vehicle. This paper describes the design method of the control sequence, which is based on the analysis of shift transition, result of applications to real cars, and its effect.

Toyota has developed a new sports shift control system introduced in the world's first eight-speed automatic transmission (AA80E), which is implemented in the “LS 460” and has been adopted in the “IS F” (upcoming 2008 model). This enables the IS F to be a vehicle that also permits the enjoyment of driving on circuits as well as achieving that “fun-to-drive” image. In sports driving, as achieved by the conventional torque converter-type automatic transmissions, shift response performance for shift operation and linearity performance for accelerator operations were challenges to tackle. On the contrary, the newly developed sports shift control system has resolved these challenges and enables the IS F to be capable of responding to a driver's intention quickly and accurately, letting the driver truly experience satisfaction.