Propulsion system for boat
US7762858B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2009 |
| Grant date | Jul 27, 2010 |
| Priority date | — |
| Expiry date | Apr 4, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H23/30
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A propulsion system for a boat includes propellers rotated by an engine, a transmission mechanism arranged to transmit a driving force of the engine to the propellers in a state that the driving force of the engine is changed to at least one of a gear reduction ratio for low speed and a gear reduction ratio for high speed, and a control unit arranged to output a signal to control a gear shift in the transmission mechanism on the basis of a throttle valve opening of the engine and a speed of the engine and 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 the output of a signal to the transmission mechanism to change the high speed reduction gear ratio when cavitation is detected. The propulsion system achieves both acceleration and maximum speed at performance levels desired by an operator of a boat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.