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, 2011
Filed:
Dec. 13, 2007
Takateru Kawaguchi, Shizuoka, JP;
Shinya Mochiyama, Shizuoka, JP;
Fumitaka Nagashima, Shizuoka, JP;
Yoshihide Shinso, Shizuoka, JP;
Takateru Kawaguchi, Shizuoka, JP;
Shinya Mochiyama, Shizuoka, JP;
Fumitaka Nagashima, Shizuoka, JP;
Yoshihide Shinso, Shizuoka, JP;
Jatco Ltd, Fuji-shi, JP;
Abstract
An automatic transmission includes a planetary gear mechanism, an engagement element group including a particular engagement element having first and second pressure chambers, a pressure control valve to regulate the fluid pressure for the particular engagement element, and a selector valve arranged to connect the second pressure chamber with the pressure control valve at a first valve position, and to disconnect the second pressure chamber from the pressure control valve at a second valve position. A shift control section is configured to command a shift operation from a first gear position, to a second gear position, by controlling the selector valve to the second valve position and to supply the fluid pressure to the first pressure chamber, and to judge the selector valve to be in an abnormal state, in accordance with a parameter in the shift operation.