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:
Nov. 08, 2011
Filed:
Apr. 23, 2008
Toshio Unno, Shizuoka, JP;
Toshio Unno, Shizuoka, JP;
Yamaha Hatsudoki Kabushiki Kaisha, Shizuoka, JP;
Abstract
The preferred embodiments of the present invention allow for easy shift-down and adjustment of a shift-down amount. According to some examples, a transmission () includes an electronically controlled transmission mechanism (), and a control unit () that controls the transmission mechanism (). The control unit () includes a transmission ratio control portion (), a shift mode selection portion () that can select an AT mode and that shifts to a shift-down permission mode when a shift-down permission signal () is output in the AT mode, and a shift-down operation amount computation portion () that computes a shift-down operation amount based on a vehicle state of a motorcycle (). The transmission ratio control portion () shifts down the transmission ratio of the transmission () based on the shift-down operation amount when a throttle () is operated in the shift-down permission mode.