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:
May. 03, 2005
Filed:
Sep. 27, 2002
Yuuji Saitou, Shizuoka, JP;
Takashi Murasugi, Shizuoka, JP;
Takashi Sano, Shizuoka, JP;
Ikuo Hirose, Shizuoka, JP;
Yuuji Saitou, Shizuoka, JP;
Takashi Murasugi, Shizuoka, JP;
Takashi Sano, Shizuoka, JP;
Ikuo Hirose, Shizuoka, JP;
Jatco Ltd, Fuji, JP;
Abstract
In a shift control system for an automatic transmission, shelf-pressure control means include means for increasing the engagement pressure of the friction elements at a first gradient as previously set after output of the shift command, wherein after output of the shift command and when start of the inertia phase is detected, a torque-reduction command is output to the torque-reduction control means, the engagement pressure at detection of the inertia phase is set as an initial shelf pressure to increase the shelf pressure at a second gradient set for each speed, and a torque variation part oil pressure is added only when detecting a variation in throttle opening, and wherein after start of the inertia phase and when completion of the inertia phase is detected, a torque-reduction completion command is output to the torque-reduction control means. With this, the shelf pressure can be set appropriately during inertia phase without needing an enormous data amount even if a variation in throttle opening is present.