Engine speed controller for a marine propulsion engine
AssigneeYamaha Marine Kabushiki Kaisha
InventorsMasaru Suzuki, Sadato Yoshida
Life of this patent
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Abstract
An electronically controlled engine speed system for an outboard motor regulates the speed of the engine to ensure proper watercraft speed. A remote input device can program the preferred embodiments of the system. The preferred embodiments of the system recognize an engaged transmission and control engine speed by changing the ignition timing, fuel injection amount, and a throttle bypass valve.
Claims9
An engine speed adjustment system for an internal combustion engine of a small watercraft comprising:
- an automatic control unit coupled to said combustion engine,
- a portable terminal storing a desired computer program for automatically regulating the trolling speed of said engine, said portable terminal and said control unit adopted for inputting said desired computer program into said control unit so that said internal combustion engine is controlled and a target engine speed is achieved during trolling.
An outboard motor having an electronic control unit, a transmission unit, a shift mechanism, and a engine speed control arrangement, said motor including:
- an internal combustion engine having an engine block, a crankshaft, and a driveshaft communicating with the transmission unit,
- an engine speed control system including a clutch sensor to determine the engagement of forward and reverse gears.
The method of automatically changing the desired trolling speed of a marine engine comprising:
- programming a portable control unit storing the desired components program,
- inputting said desired computer program into the electronic control unit of said marine engine, and
- using said programmed electronic control unit to automatically activate an opening of a bypass passage for introducing atmospheric air into the combustion chamber of said marine engine.
The method of automatically changing the desired trolling speed of a marine engine comprising:
- programming a portable control unit storing the desired components program,
- inputting said desired computer program into the electronic control unit of said marine engine, and
- using said programmed electronic control unit to automatically advance or retard the ignition timing of said internal combustion engine.
The method of automatically changing the desired trolling speed of a marine engine comprising:
- programming a portable control unit storing the desired components program,
- inputting said desired computer program into the electronic control unit of said marine engine, and
- using said programmed electronic control unit to automatically increase or decrease the amount of fuel injected by the fuel injectors.
The method of automatically changing the desired trolling speed of a marine engine comprising:
- programming a portable control unit to store a desired computer program,
- inputting said desired computer program into the electronic control unit of said marine engine, and
- using said programmed electronic control unit to increase and decrease the engine controls step-by-step to achieve the desired trolling speed.
Dependencies are inferred from the claim text.