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. 11, 2006
Filed:
Apr. 12, 2004
Kazuyuki Watanabe, Anjou, JP;
Toshimitsu Sato, Toyota, JP;
Atsushi Ayabe, Toyota, JP;
Shinji Kato, Auderghem, BE;
Naoyuki Sakamoto, Toyota, JP;
Hiromichi Kimura, Okazaki, JP;
Noboru Shibata, Anjo, JP;
Mitsuhiro Nakamura, Anjo, JP;
Hideaki Ogasawara, Anjo, JP;
Kazuyuki Watanabe, Anjou, JP;
Toshimitsu Sato, Toyota, JP;
Atsushi Ayabe, Toyota, JP;
Shinji Kato, Auderghem, BE;
Naoyuki Sakamoto, Toyota, JP;
Hiromichi Kimura, Okazaki, JP;
Noboru Shibata, Anjo, JP;
Mitsuhiro Nakamura, Anjo, JP;
Hideaki Ogasawara, Anjo, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Aisin AW Co., Ltd., Anjo, JP;
Abstract
A shift control apparatus of an automatic transmission of a motor vehicle to which torque is transmitted from an engine via a fluid coupling device is provided. In the automatic transmission including a plurality of hydraulically operated friction elements, a clutch-to-clutch downshift is carried out during coasting of the vehicle by releasing one of the friction elements and engaging another friction element. A controller of the shift control apparatus detects a difference between input and output rotation speeds of the fluid coupling device, and increases an engine speed by a controlled amount based on the difference between the input and output rotation speeds when the clutch-to-clutch downshift is carried out during coasting of the vehicle, so that the vehicle is brought into a minimal driving state in which the engine speed is slightly higher than the output rotation speed of the fluid coupling device.