Jet-propulsion personal watercraft

Details Jet-propulsion personal watercraft Jet-propulsion personal watercraft

2008-05-08

2010-06-29

Avila, Stephen (Department: 3617)

Marine propulsion

Means to control the supply of energy responsive to a sensed...

Reexamination Certificate

active

07744433

ABSTRACT:
A jet-propulsion personal watercraft includes an engine configured to generate a driving power for generating a propulsion force to propel the watercraft, an engine speed changing system configured to be able to change an engine speed of the engine, a determiner configured to determine whether or not to execute control for effectively steering the watercraft at start of deceleration, and an engine controller configured to control the engine speed changing system based on information received from the determiner. The engine controller is configured to, when the determiner determines that the control for effectively steering the watercraft should not be executed, control the engine speed changing system so that a decrease rate of the engine speed immediately after the determination is smaller than a decrease rate of the engine speed in a case where the determiner determines that the control for effectively steering the watercraft should not be executed.

REFERENCES:
patent: 6231410 (2001-05-01), Bernier et al.
patent: 6709302 (2004-03-01), Yanagihara
patent: 7160158 (2007-01-01), Kinoshita

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