Marine propulsion – Engine – motor – or transmission control means – For transmission
Reexamination Certificate
2009-02-18
2011-11-29
Venne, Daniel (Department: 3617)
Marine propulsion
Engine, motor, or transmission control means
For transmission
Reexamination Certificate
active
08066539
ABSTRACT:
A marine propulsion system includes a transmission mechanism arranged to transmit a driving force generated by an engine to propellers with a speed thereof changed to a low speed reduction ratio and a high speed reduction ratio; a control lever section operated by a user in controlling drive of the engine; and a control portion and an ECU controlling a shift between reduction ratios of the transmission mechanism based on operation of the control lever section by the user. The control portion and the ECU control a shift between reduction ratios of the transmission mechanism based on a transmission control map providing a reference for a shift between reduction ratios of the transmission mechanism taking into consideration an engine speed of the engine and a lever opening of the control lever section. This arrangement provides a marine propulsion system in which both acceleration performance and maximum speed can approach levels that a user desires.
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Nakamura Daisuke
Suzuki Takayoshi
Keating & Bennett LLP
Venne Daniel
Yamaha Hatsudoki Kabushiki Kaisha
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