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US 2001/0027069 A1Published application
Induction system for 4-cycle engine of small watercraft
AssigneeYamaha Marine Kabushiki Kaisha
InventorsTetsuya Mashiko, Masaki Takegami
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AssigneeYamaha Marine Kabushiki Kaisha
InventorsTetsuya Mashiko, Masaki Takegami
Estimating the term…
An induction system for a 4-cycle engine of a small watercraft includes an improved construction which can accommodate a large plenum chamber notwithstanding being placed in an engine compartment limited in size. The induction system includes improved filtration, and accessibility characteristics. The air induction system can include a plenum chamber member defining the plenum chamber. The air induction system can also include one or more throttle bodies within the plenum chamber to allow the construction of a large plenum chamber. The plenum chamber member is can comprise at least three parts with at least one part being disposed substantially above the spark plugs and being removable. The air induction system can also include an air filter having a water repellent element and an oil-resistant element arranged such that a flow of air entering the combustion chambers passes through both the water repellent and oil-resistant elements.
A watercraft comprising a hull defining an engine compartment, an internal combustion engine disposed in the engine compartment, the engine including an engine body defining a combustion chamber, an air induction system configured to guide air into the combustion chamber, the air induction system comprising a plenum chamber, a throttle body, and an air filter, the plenum chamber having an air inlet port, the air filter positioned between the air inlet port and the throttle body along an air flow path through the induction system, the filter comprising a water repellent element and an oil-resistant element, wherein the airflow path through the induction system passes through both the water repellent element and the oil-resistant element.
A watercraft comprising a hull defining an engine compartment, an internal combustion engine disposed in the engine compartment, a propulsion device driven by the engine, the engine including an engine body defining at least one combustion chamber therein, an induction system configured to guide air into the combustion chamber for combustion therein, the induction system comprising at least one plenum chamber having an upper portion and a lower portion being engageable with each other, the lower portion including a removable wall.
A watercraft comprising a hull defining in engine compartment, an internal combustion engine disposed in the engine compartment, a propulsion device driven by the engine, the engine having an engine body defining at least one combustion chamber therein, an exhaust system for guiding exhaust gases from the combustion chamber to the atmosphere, an induction system configured to guide air along an induction airflow path to the combustion chamber for combustion therein, the induction system comprising a filter having at least a water repellent element, the filter being disposed along the airflow path so as to remove at least a portion of water or water vapor contained in air flowing along the airflow path, and an air supply device configured to guide air from a portion of the induction system downstream from the filter into the exhaust system.
A filter for an induction system of a marine-duty internal combustion engine, the filter comprising:
An internal combustion engine comprising an engine body defining at least one combustion chamber therein, an induction system configured to guide air into the combustion chamber for combustion therein, the induction system comprising at least one plenum chamber having an upper portion and a lower portion, each having a circumstantially extending seal configured to sealedly connect the upper and lower portion, the lower portion including a removable wall.
A marine-duty internal combustion engine comprising an engine body defining at least one combustion chamber therein, an exhaust system for guiding exhaust gases away from the combustion chamber, an induction system configured to guide air along an induction airflow path to the combustion chamber for combustion therein, the induction system comprising an air filter having at least a water repellent element, and an air supply device configured to guide air from a portion of the induction system downstream from the filter into the exhaust system.
Dependencies are inferred from the claim text.