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:
Jul. 07, 2009
Filed:
Oct. 02, 2006
Tetsuya Izumi, Yokohama, JP;
Hironori Nihei, Zama, JP;
Seonjae Kim, Seoul, KR;
Takeshi Chibahara, Ichikawa, JP;
Toru Koga, Atsugi, JP;
Tetsuya Izumi, Yokohama, JP;
Hironori Nihei, Zama, JP;
Seonjae Kim, Seoul, KR;
Takeshi Chibahara, Ichikawa, JP;
Toru Koga, Atsugi, JP;
Jatco Ltd, Fuji-shi, JP;
Abstract
When a line pressure PL serving as a source pressure of a primary pulley () and a secondary pulley () is controlled on the basis of a control deviation ΔStep, which is the deviation between a step count StepMdl of a step motor () corresponding to a target speed ratio I (o) and a value obtained by adding a target deviation GTstep and a starting learned value Gstep to a step count Bstep of the step motor () corresponding to an actual speed ratio ip, the engine torque varies dramatically beyond the range of a predetermined value Tand a predetermined value Tduring a predetermined time period t, a learning error determination relating to the starting learned value Gstep is prohibited for a predetermined time period t