Watercraft and exhaust structure of the watercraft
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorHaruo OKAMOTO
Life of this patent
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Abstract
An exhaust system for a watercraft with an engine includes an upstream exhaust pipe including an end portion with an outlet, a water lock including an inner space accommodating the end portion, a downstream exhaust pipe connected to the water lock, and a flow direction diverter, such as a baffle. The upstream exhaust pipe guides exhaust gas from the engine to the end portion. The inner space of the water lock receives the exhaust gas from the outlet of the end portion. The downstream exhaust pipe exhausts the exhaust gas from the inner space to an outside of the watercraft body. The flow direction diverter changes a flow direction of the exhaust gas at the outlet to a cross direction which intersects a pipe axis of the end portion.
Claims20
A watercraft comprising:
- a watercraft body;
- an engine in the watercraft body;
- an upstream exhaust pipe that includes an end portion with an outlet, and that guides exhaust gas from the engine to the end portion;
- a water lock that includes an inner space which houses the end portion and into which the exhaust gas flows from the outlet;
- a downstream exhaust pipe that is connected to the water lock, and that exhausts the exhaust gas from the inner space to an outside of the watercraft body;
- and
- a flow direction diverter that changes a flow direction of the exhaust gas at the outlet to a cross direction which intersects a pipe axis of the end portion;
- wherein
- a distance between an inner wall of the water lock and the flow direction diverter in a direction perpendicular to the pipe axis is not less than 10 mm and not more than 400 mm.
A watercraft comprising:
- a watercraft body;
- an engine in the watercraft body;
- an upstream exhaust pipe that includes an end portion with an outlet, and that guides exhaust gas from the engine to the end portion;
- a water lock that includes an inner space which houses the end portion and into which the exhaust gas flows from the outlet;
- a downstream exhaust pipe that is connected to the water lock, and that exhausts the exhaust gas from the inner space to an outside of the watercraft body;
- and
- a flow direction diverter that changes a flow direction of the exhaust gas at the outlet to a cross direction which intersects a pipe axis of the end portion;
- wherein
- a distance between an inner wall of the water lock and the flow direction diverter in a direction perpendicular to the pipe axis is not less than one-half of an outer dimension of the flow direction diverter and not more than ten times the outer dimension.
An exhaust system for a watercraft with an engine, the exhaust system comprising:
- an upstream exhaust pipe that includes an end portion with an outlet, and that guides exhaust gas from the engine to the end portion;
- a water lock that includes an inner space which houses the end portion and into which the exhaust gas flows from the outlet;
- a downstream exhaust pipe that is connected to the water lock, and that exhausts the exhaust gas from the inner space to an outside of the watercraft body;
- and
- a flow direction diverter that changes a flow direction of the exhaust gas at the outlet to a cross direction which intersects a pipe axis of the end portion;
- wherein
- a distance between an inner wall of the water lock and the flow direction diverter in a direction perpendicular to the pipe axis is not less than 10 mm and not more than 400 mm.
Dependencies are inferred from the claim text.