The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 25, 1992
Filed:
Dec. 21, 1990
Toshiyuki Asada, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A shift control system for use in an automatic transmission which includes a plurality of frictional engagement components, and a gear train adapted to set a plurality of speed stage having (Tables 1 and 3) different gear ratios in accordance with the combination for engagement/release of the frictional engagement components and enabled to select a combination for engaging and releasing any of the frictional engagement components as that for engagement/release of the frictional engagement components for setting any of the speed stages. The shift control system includes a decider for deciding a shift to be executed; an engagement/release pattern selector for selecting a combination for engaging the frictional engagement components in a first combination (Table 3) for setting a predetermined one of the speed stages, before the shift is decided, and a second combination (Table 3) for the predetermined one of gear stages if the shift is decided; and an output device for outputting both an instruction signal for executing the shift and an instruction signal for setting the second combination (Table 1) of the frictional engagement components.