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:
Sep. 23, 2014
Filed:
Apr. 30, 2009
Katsumi Doihara, Fuji, JP;
Yoshihisa Kodama, Fuji, JP;
Yasuaki Yoshikawa, Fuji, JP;
Masahiro Nishi, Fuji, JP;
Keisuke Koyama, Fuji, JP;
Kenta Nakamura, Fuji, JP;
Kiyotaka Sawano, Fuji, JP;
Hidemasa Kawaguchi, Fuji, JP;
Katsumi Doihara, Fuji, JP;
Yoshihisa Kodama, Fuji, JP;
Yasuaki Yoshikawa, Fuji, JP;
Masahiro Nishi, Fuji, JP;
Keisuke Koyama, Fuji, JP;
Kenta Nakamura, Fuji, JP;
Kiyotaka Sawano, Fuji, JP;
Hidemasa Kawaguchi, Fuji, JP;
Jatco Ltd, Fuji-shi, JP;
Nissan Motor Co., Ltd., Yokohama-shi, JP;
Abstract
A belt type continuously variable transmission mechanism has a primary pulley, a secondary pulley, and a belt, and a secondary hydraulic pressure controller to determine command secondary hydraulic pressure by feedback control based on the deviation between target secondary hydraulic pressure and actual hydraulic pressure, and control the secondary hydraulic pressure to the secondary pulley. The belt type continuously variable transmission mechanism further includes a belt slip control device to estimate a belt slip condition by monitoring the phase difference between an oscillation component included in the actual secondary hydraulic pressure and an oscillation component included in the actual transmission gear ratio and control the actual secondary hydraulic pressure to decrease based on the estimation so that a predetermined belt slip condition is maintained. The secondary hydraulic pressure control unit aborts feedback control of the secondary hydraulic pressure during belt slip control and controls the secondary hydraulic pressure by open control.