Propulsion system for boat
US7762859B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2009 |
| Grant date | Jul 27, 2010 |
| Priority date | — |
| Expiry date | Apr 5, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H23/08
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A propulsion system for a boat includes propellers arranged to be rotated by an engine, a transmission mechanism arranged to transmit driving force of the engine to the propellers such that a speed of the driving force of the engine is changed at least with a gear reduction ratio for low speed and high speed, and a control unit arranged to output a signal to control a gear shift in the transmission mechanism on the basis of an amount of lever opening, which is based on operation of a control lever section, and speed of the engine, and the control unit being arranged to detect cavitation generated in conjunction with rotation of the propellers on the basis of a gear shift control map. The control unit is arranged to control output of a signal to the transmission mechanism for changing a reduction gear to that for high speed when cavitation is detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.