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. 14, 2012
Filed:
Dec. 08, 2010
Shoichiro Araki, Anjo, JP;
Takafumi Hayashi, Anjo, JP;
Shoichiro Araki, Anjo, JP;
Takafumi Hayashi, Anjo, JP;
Aisin Aw Co., Ltd., Tokyo, JP;
Abstract
An automatic transmission control device for improving shift feel includes a pressure regulating device that regulates a friction engagement element, and transmits power to an output shaft, which is input to an input shaft through a change of a shift speed by controlling the pressure regulating device to switch an engagement state. When changing shift speed while applying torque to the input shaft, the transmission changes the shift speed via (1) a torque phase where torque is changed according to shift speed after shifting, and (2) an inertia phase where an input shaft rotation speed is changed according to the shift speed after shifting. During a shift speed change, the regulating device executes the torque phase by engaging the engagement element at a predetermined pressure with slip and standby, and executes the inertia phase by reducing an amount according to the shift speed so a shifting condition falls within a predetermined range regardless of changed shift speed, and reduces input shaft torque by a set amount, while standing by at the predetermined engagement pressure.