System for and method of controlling watercraft
AssigneeYamaha Hatsudoki Kabushuki Kaisha
InventorsHiroshi Inoue, Norimitsu Nakatsugawa
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Abstract
A system to control a watercraft including an engine includes a first temperature sensor and a controller. The first temperature sensor is operable to detect a temperature of the engine. The controller is configured or programmed to obtain the temperature of the engine either upon an activation of the controller or a start of the engine. The controller is configured or programmed to estimate an environmental temperature of the watercraft based on the temperature of the engine obtained either upon the activation of the controller or the start of the engine.
Claims14
A system for controlling a watercraft including an engine, the system comprising:
- a first temperature sensor to detect an intake air temperature of the engine;
- a second temperature sensor to detect an engine wall temperature;
- a display to display information regarding the engine;
- and
- a controller configured or programmed to:
- obtain the air intake temperature of the engine either upon an activation of the controller or a start of the engine;
- obtain an engine wall temperature upon the activation of the controller or the start of the engine;
- estimate an external air temperature based on the intake air temperature obtained either upon the activation of the controller or the start of the engine when a difference between the engine wall temperature and the intake air temperature is less than or equal to a threshold;
- and
- determine an occurrence of malfunctioning or abnormality of the watercraft based on the estimated external air temperature;
- and
- display an alert on the display when it is determined that malfunctioning or abnormality of the engine occurs;
- wherein
- the system does not include a sensor to detect the external air temperature.
A system for controlling a watercraft including an engine and a water pump to draw in external water to supply the engine with the external water as a cooling water of the engine, the system comprising:
- a first temperature sensor to detect a cooling water temperature of the engine;
- a display to display information regarding the engine;
- and
- a controller configured or programmed to:
- obtain the cooling water temperature of the engine either upon an activation of the controller or a start of the engine;
- estimate a temperature of the external water based on the cooling water temperature obtained upon the activation of the controller or the start of the engine;
- determine an occurrence of malfunctioning or abnormality of the watercraft based on the estimated temperature of the external water;
- and
- display an alert on the display when it is determined that malfunctioning or abnormality of the engine occurs;
- wherein
- the system does not include a sensor to detect the external water temperature.
A method of controlling a watercraft including an engine and a controller to control the engine, the method comprising:
- obtaining an intake air temperature of the engine either upon an activation of the controller or a start of the engine;
- obtaining an engine wall temperature either upon the activation of the controller or the start of the engine;
- estimating an external air temperature based on the intake air temperature obtained either upon the activation of the controller or the start of the engine in response to a difference between the engine wall temperature and the intake air temperature being less than or equal to a threshold;
- determining an occurrence of malfunctioning or abnormality of the watercraft based on the estimated external air temperature;
- and
- displaying an alert on a display when it is determined that malfunctioning or abnormality of the engine occurs;
- wherein
- the watercraft does not include a sensor to detect the external air temperature.
A method of controlling a watercraft including an engine, a water pump to draw in external water to supply the engine with the external water as a cooling water of the engine, and a controller to control the engine, the method comprising:
- obtaining a cooling water temperature of the engine either upon an activation of the controller or a start of the engine;
- and
- estimating a temperature of the external water based on the cooling water temperature obtained upon the activation of the engine or the start of the engine;
- determining an occurrence of malfunctioning or abnormality of the watercraft based on the estimated temperature of the external water;
- and
- displaying an alert on a display when it is determined that malfunctioning or abnormality of the engine occurs;
- wherein
- the watercraft does not include a sensor to detect the temperature of the external water.
Dependencies are inferred from the claim text.