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:
Nov. 08, 2005
Filed:
Jul. 31, 2002
Naoyuki Sakamoto, Toyota, JP;
Kazuyuki Watanabe, Anjou, JP;
Toshimitsu Sato, Toyota, JP;
Atsushi Ayabe, Toyota, JP;
Hiromichi Kimura, Okazaki, JP;
Hideaki Ogasawara, Anjo, JP;
Noboru Shibata, Anjo, JP;
Mitsuhiro Nakamura, Anjo, JP;
Naoyuki Sakamoto, Toyota, JP;
Kazuyuki Watanabe, Anjou, JP;
Toshimitsu Sato, Toyota, JP;
Atsushi Ayabe, Toyota, JP;
Hiromichi Kimura, Okazaki, JP;
Hideaki Ogasawara, Anjo, JP;
Noboru Shibata, Anjo, JP;
Mitsuhiro Nakamura, Anjo, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A duty ratio for controlling an engagement force of a friction engagement device on the side of upshift engagement is corrected by an amount corresponding to an intermediate correction control value in the course of the shift. In addition, on a prerequisite condition that learning correction of a constant standby pressure control value at the start of the shift is converged, learning correction is performed for the intermediate correction control value according to a gradient of a turbine speed. Thus, a shift shock is prevented from occurring due to abrupt engagement of the friction engagement device and the like at the completion of the shift.