Marine propulsion device
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United States of America Patent
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Apr 3, 2018
Issued Date -
N/A
app pub date -
Feb 22, 2016
filing date -
May 20, 2015
priority date (Note) -
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Abstract
A marine propulsion device includes an engine, a cylinder cooling pathway through which a cooling water passes, a water pump, an electromagnetic valve, a water pressure sensor, a water temperature sensor, and a controller. The engine includes a cylinder. The cylinder cooling pathway is disposed in an area surrounding the cylinder. The water pump supplies the cooling water to the cylinder cooling pathway from outside. The electromagnetic valve restricts a flow of the cooling pathway in the cylinder cooling pathway. The water pressure sensor detects a water pressure of the cooling water in the cylinder cooling pathway. The water temperature sensor detects a water temperature of the cooling water in the cylinder cooling pathway. The controller is configured or programmed to control an opening degree of the electromagnetic valve based on a detection value of the water pressure sensor and a detection value of the water temperature sensor.
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