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:
Dec. 16, 2014
Filed:
Apr. 30, 2009
Katsumi Doihara, Fuji, JP;
Yoshihisa Kodama, Fuji, JP;
Yasuaki Yoshikawa, Fuji, JP;
Kenta Nakamura, Fuji, JP;
Kiyotaka Sawano, Fuji, JP;
Masahiro Nishi, Fuji, JP;
Hidemasa Kawaguchi, Fuji, JP;
Keisuke Koyama, Fuji, JP;
Katsumi Doihara, Fuji, JP;
Yoshihisa Kodama, Fuji, JP;
Yasuaki Yoshikawa, Fuji, JP;
Kenta Nakamura, Fuji, JP;
Kiyotaka Sawano, Fuji, JP;
Masahiro Nishi, Fuji, JP;
Hidemasa Kawaguchi, Fuji, JP;
Keisuke Koyama, Fuji, JP;
Nissan Motor Co., Ltd., Yokohama-shi, JP;
Jatco Ltd, Fuji-shi, JP;
Abstract
A control device for a belt type continuously variable transmission device includes primary And secondary pulleys and a belt and controls gear ratio based on a running radius of the belt on a pulley by controlling primary and secondary oil pressures. The transmission includes a belt slip control unit and a belt slip control permission determining unit. The belt slip control unit performs such control as to oscillate the secondary oil pressure, estimates a belt slip condition by monitoring the phase difference between an oscillation component included in an actual secondary oil pressure and an oscillation component included in an actual gear ration, and then reduces the actual secondary oil pressure to maintain a predetermined belt slip condition. The belt slip control permission determining unit permits belt slip control when a transmission rate as a change rate of the gear ratio is less than a predetermined value.