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. 19, 2008
Filed:
Sep. 21, 2005
Hideki Oshita, Yokohama, JP;
Hiroyasu Tanaka, Kanagawa, JP;
Takuichiro Inoue, Kanagawa, JP;
Youhei Ishikawa, Kanagawa, JP;
Kousuke Abe, Yokohama, JP;
Hideki Oshita, Yokohama, JP;
Hiroyasu Tanaka, Kanagawa, JP;
Takuichiro Inoue, Kanagawa, JP;
Youhei Ishikawa, Kanagawa, JP;
Kousuke Abe, Yokohama, JP;
Jatco Ltd, Shizuoka, JP;
Abstract
The shift control apparatus for a continuously-variable transmission includes a primary pulley; a secondary pulley connected with the primary pulley by a belt; a shift actuator that varies a speed ratio; a line pressure adjusting that adjusts a line pressure; a secondary-pressure adjusting section that adjusts a secondary pressure; and a control section that controls the shift actuator, the line pressure adjusting section, and the secondary-pressure adjusting section. Moreover, the control section includes a fail determining section that determines whether the shift actuator is under a failed condition. The control section carries out a fail-safe shift-actuator fixing control to fix the shift actuator, when the fail determining section determines that the shift actuator is under the failed condition, and carries out a fail-safe hydraulic control to bring the line pressure to its upper limit pressure and bring the secondary pressure to its maximum pressure, when a control-start criterion predetermined to secure driving performance of the vehicle is satisfied under the failed condition.