Engine control device for water vehicle
AssigneeYamaha Marine Kabushiki Kaisha
InventorsAkitaka Suzuki, Shigeharu Mineo, Hitoshi Motose
Life of this patent
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Abstract
A watercraft includes an engine output control device that can adjust the maximum output of the engine. The output device can be constructed of mechanical devices for adjusting the relationship between the movement of a throttle lever and a throttle valve, an electronic device for proportionally controlling the position of throttle valves in relation to the movement of the throttle lever, are other devices for controlling engine speeds in other ways.
Claims18
A watercraft comprising a hull, the hull defining an operator's area, an engine output request device disposed in the operator's area being movable between a minimum position and a maximum position, an engine supported by the hull, the engine including an engine body defining at least one combustion chamber therein, an air amount control device configured to control an amount of air flowing into the combustion chamber, the air amount control device being operable in at least first and second modes, the air amount control device being configured to, in the first mode, allow a maximum amount of air to flow into the combustion chamber when the engine output request device is positioned in the maximum position, and being configured to, in the second mode, allow an amount of air less than the maximum amount, when the engine output request device is positioned in the maximum position.
A method of regulating the output of an engine comprising receiving engine output requests between minimum and maximum magnitudes, controlling a flow of air into a combustion chamber of the engine in accordance with the engine output requests and, in a first mode, allowing a maximum amount of air to flow to the combustion chamber in response to a maximum magnitude engine output request, and in a second mode, preventing the maximum amount of air from flowing to the combustion chamber in response to a maximum magnitude engine output request.
An internal combustion engine comprising an engine body defining at least one combustion chamber therein, an engine output request device, a control device configured to control an amount of air flowing into the combustion chamber based on a signal from the engine output request device, and means for changing the relationship between at least a maximum signal from the engine output request device and a maximum amount of air flowing into the combustion chamber.
Dependencies are inferred from the claim text.