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. 13, 2011
Filed:
Feb. 27, 2009
Takayoshi Suzuki, Shizuoka, JP;
Mitsuhiro Ryuman, Shizuoka, JP;
Daisuke Nakamura, Shizuoka, JP;
Yamaha Hatsudoki Kabushiki Kaisha, Shizuoka, JP;
Abstract
A marine propulsion system that achieves both an acceleration performance and top speed closer to the performance desired by a boat driver includes an engine, propellers rotated by the driving force of the engine, a transmission mechanism arranged to convey the driving force of the engine to the propellers at least after shifting into a low speed reduction gear ratio and into a high speed reduction gear ratio, an acceleration sensor arranged to detect the acceleration of a hull propelled by the rotation of the propellers, and a control section and an ECU arranged to carry out the control for changing the reduction gear ratio of the transmission mechanism. The control section and the ECU are configured to control the transmission mechanism to shift from the low speed reduction gear ratio into the high speed reduction gear ratio based on the acceleration of the hull.