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:
Jul. 14, 1992
Filed:
Dec. 21, 1990
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A shift control system for use in an automatic transmission which comprises: a plurality of frictional engagement components; and a gear train adapted to set a plurality of speed stages having 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 comprises: a detector for detecting the engagement failure of the frictional engagement components; an engagement/release pattern selector for selecting a combination for releasing any one of the frictional engagement components as the combinations for engagement/release of the frictional engagement components for setting any one of the speed stages, if the engagement failure of any one of the frictional engagement components is detected; and an output device for outputting an instruction signal for setting the selected combination for engagement/release of the frictional engagement components.