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:
Jun. 23, 1992
Filed:
Aug. 10, 1990
Setsuo Tokoro, Susono, JP;
Mitsuru Takada, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An apparatus for controlling a vehicle automatic transmission having a plurality of operating positions, including a determining device for determining satisfaction degress of at least one basic fuzzy set theory rule corresponding to the respective operating positions of the transmission, based on a predetermined shift pattern, a first calculating device for calculating satisfaction degrees of fuzzy set control rules, corresponding to the respective operating positions of the transmission, depending upon a detected vehicle running condition, a second calculating device for calculating overall satisfaction degrees for selecting the respective operating positions, based on the calculated satisfaction degress of the basic fuzzy set theory rule or rules and the calculated satisfaction degrees of the fuzzy set control rules, and a selector for selecting one of the positions of the transmission, based on the calculated overall satisfaction degrees, so that the automatic transmission is shifted to the selected position.