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. 17, 1993
Filed:
Feb. 28, 1992
Tokuyuki Takahashi, Owariasahi, JP;
Yasunari Nakamura, Nagoya, JP;
Kagenori Fukumura, Toyota, JP;
Kohjiroh Kuramochi, Okazaki, JP;
Seitoku Kubo, Toyota, JP;
Takashi Ohta, Toyota, JP;
Yoshihiro Iijima, Toyota, JP;
Daisuke Inoue, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A shift control apparatus for an automatic transmission including a gear train having a plurality of one-way clutches having their engagement states switched in accordance with torque applying directions and a plurality of frictional engagement units adapted to be engaged by oil pressures. The apparatus comprises a controller for engaging a first one of the frictional engagement units so as to maintain a predetermined gear stage after any of the one-way clutches has been engaged or released, if a predetermined condition is satisfied after the one-way clutch has been engaged or released to start a shift to the predetermined gear stage.