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:
Jan. 03, 2012
Filed:
Jan. 29, 2008
Applicant:
Ryousuke Asaoka, Shizuoka, JP;
Inventor:
Ryousuke Asaoka, Shizuoka, JP;
Assignee:
Yamaha Hatsudoki Kabushiki Kaisha, Iwata-Shi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A transmission includes a gear ratio change mechanism, a driving circuit and an electronic control unit (ECU). The gear ratio change mechanism has a motor for continuously varying the gear ratio. The driving circuit applies a pulse voltage to the motor. The ECU outputs a control signal to the driving circuit. The duty ratio and/or the pulse height of the pulse voltage is changed according to the control signal. The ECU performs a low-pass filtering process on the control signal to output the low-pass filtered control signal to the driving circuit. Gear ratio change shocks are thereby suppressed.