Toshiyuki Asada

TL;DR: In this article, a planetary gear device having a first and a second singlepinion planetary gear unit (1, 2) and a third double-pinion unit (3), which are coaxially disposed so as to provide different speed reduction ratios, is presented.

TL;DR: In this paper, a shift control system and method for use in an automatic transmission includes a plurality of frictional engagement elements and a gear train settable to a multiplicity of speed stages of different gear ratios according to the engagement/release states.

TL;DR: A planetary gear type speed change device has two simple planetary gear mechanisms positioned axially adjacent with one another with each carrier thereof being connected with each ring gear of the other, three clutches and three brakes assembled together between an input and an output rotational member so as to provide six monotonously changing gear ratios as discussed by the authors.

TL;DR: In this article, a speed changing gear device for an automatic transmission, comprising a main gear assembly for providing a plurality of operating positions, and an auxiliary gear assembly, is presented.

TL;DR: A shift control system for a vehicular automatic transmission including a gear train to be set to a plurality of gear stages in accordance with the engaged or released states of the friction devices is described in this article.