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:
Jan. 31, 2006
Filed:
Sep. 27, 2002
Yuuji Saitou, Shizuoka, JP;
Kenichi Ooshima, Shizuoka, JP;
Ikuo Hirose, Shizuoka, JP;
Masato Tanaka, Shizuoka, JP;
Yuuji Saitou, Shizuoka, JP;
Kenichi Ooshima, Shizuoka, JP;
Ikuo Hirose, Shizuoka, JP;
Masato Tanaka, Shizuoka, JP;
Jatco LTD, Fuji, JP;
Abstract
A system for controlling a torque reduction at shifting for an automatic transmission is provided with actual gear-ratio detecting means for detecting an actual gear ratio out of input rotation and output rotation of the automatic transmission, and torque-reduction amount computing means for calculating a torque-reduction amount out of a torque-reduction set gain set previously, which is a rate of change of the torque-reduction amount with respect to a change in gear ratio, and the detected actual gear ratio. With this, the start and completion timings of torque-reduction control can be optimized to prevent elongation of shifting. This results in enhancement in the shift quality and in the endurance reliability of a friction material for shifting.