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:
Aug. 16, 2011
Filed:
Oct. 02, 2006
Hironori Nihei, Zama, JP;
Tetsuya Izumi, Yokohama, JP;
Seonjae Kim, Seoul, KR;
Fumito Shinohara, Atsugi, JP;
Kiyotaka Sawano, Hiratsuka, JP;
Takuya Numata, Fuji, JP;
Hironori Nihei, Zama, JP;
Tetsuya Izumi, Yokohama, JP;
Seonjae Kim, Seoul, KR;
Fumito Shinohara, Atsugi, JP;
Kiyotaka Sawano, Hiratsuka, JP;
Takuya Numata, Fuji, JP;
Jatco Ltd, Fuji-shi, JP;
Abstract
In a speed ratio control device for a belt continuously variable transmission according to this invention, when a speed ratio is subjected to feedback control on the basis of a difference between an actual speed ratio and a target speed ratio, pressure supplied to a primary pulley is corrected through feedforward (S, S) in order to suppress variation in the groove width of the primary pulley caused by a rapid variation in an input torque into the primary pulley (S) while traveling in a fixed speed ratio mode (S) in which the target speed ratio is held at a fixed value.