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:
Feb. 08, 2011
Filed:
Feb. 23, 2006
Kensuke Kamichi, Aichi-gun, JP;
Kiyoshiro Ueoka, Nisshin, JP;
Masaya Yamamoto, Kasugai, JP;
Kazuomi Okasaka, Nagoya, JP;
Yoichi Tajima, Anjo, JP;
Kensuke Kamichi, Aichi-gun, JP;
Kiyoshiro Ueoka, Nisshin, JP;
Masaya Yamamoto, Kasugai, JP;
Kazuomi Okasaka, Nagoya, JP;
Yoichi Tajima, Anjo, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Aisin AW Co., Ltd., Anjo, JP;
Abstract
In a drive system, where power from a motor is transmitted to a drive shaft and a transmission ratio is changed by a transmission, if the absolute value of the difference between the reference torque Tmr, which is the drive shaft side torque Tmr at the onset of a change in the shift speed of the transmission, and the driving shaft side torque Tmr during the change is less than the threshold value α until the end of the change (S), the application state of a brake in the transmission during the change and the state of the hydraulic pressure supplied to the brake are learned (S). During the change, and actuator of the transmission is controlled using those learned results. Accordingly, any deviations that may have occurred due to changes over time in the transmission, etc. are corrected and the shift speed of the transmission is changed more appropriately.