Marine vessel propulsion device and marine vessel including...

Details Marine vessel propulsion device and marine vessel including... Marine vessel propulsion device and marine vessel including...

2009-08-28

2011-12-13

Venne, Daniel (Department: 3617)

Marine propulsion

Engine, motor, or transmission control means

For transmission

Reexamination Certificate

active

08075356

ABSTRACT:
A marine vessel propulsion device includes an engine arranged to generate a driving force by combustion of a fuel by an ignition unit, a thrust generating unit arranged to be driven by the driving force of the engine to generate thrust underwater, a shift mechanism unit arranged to switch between a transmitting state of transmitting the driving force of the engine to the thrust generating unit and a cut-off state of cutting off the driving force of the engine from the thrust generating unit, a shift drive unit arranged to drive the shift mechanism unit, and a control unit arranged to electrically control the shift drive unit based on a position of a shift operational unit that is arranged to be operated by a user to perform a shifting operation to a first shift position corresponding to the transmitting state, and a second shift position corresponding to the cut-off state. When changing from the first shift position to the second shift position, the control unit temporarily lowers an engine speed by starting misfire control of the ignition unit. After the start of the misfire control, the control unit controls the shift drive unit such that the shift mechanism unit starts the switching from the transmitting state to the cut-off state after a delay time period corresponding to a time from the start of misfire control to a point in time when the ignition unit actually starts to misfire.

REFERENCES:
patent: 5827150 (1998-10-01), Mukumoto
patent: 6102755 (2000-08-01), Hoshiba
patent: 6587765 (2003-07-01), Graham et al.
patent: 6679740 (2004-01-01), Imanaka et al.
patent: 2004/0142611 (2004-07-01), Itoi
patent: 2004-218477 (2004-08-01), None
patent: 2005-113904 (2005-04-01), None

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