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:
Nov. 04, 2008
Filed:
Oct. 05, 2005
Yoshihisa Kodama, Yokohama, JP;
Midori Yamaguchi, Yokohama, JP;
Hisao Nobu, Tokyo, JP;
Kouhei Wakida, Kanagawa, JP;
Yoshihisa Kodama, Yokohama, JP;
Midori Yamaguchi, Yokohama, JP;
Hisao Nobu, Tokyo, JP;
Kouhei Wakida, Kanagawa, JP;
JATCO Ltd, Shizuoka, JP;
Abstract
In hydraulic pressure control apparatus and method for a continuously variable transmission, a line pressure of the continuously variable transmission is developed with a working oil supplied from an oil pump as an original pressure, and a command pressure is set to develop a line pressure target value of the target value in such a manner that the command pressure is maintained at a predetermined small value for a constant time and, thereafter, the value of the command pressure is raised up to the target value when a shift range of the continuously variable transmission is switched from a neutral range to a running range, the command pressure being raised at a rate lower than a step input to suppress an overshoot developed in the actual line pressure.