Engine and personal watercraft equipped with engine
AssigneeKawasaki Jukogyo Kabushiki Kaisha
InventorsYoshinobu Tanaka, Yoshimoto Matsuda
Life of this patent
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Abstract
Disclosed is a personal watercraft capable of efficiently placing a dry-sump engine in a narrow engine room and of efficiently using a dead space in the engine room. The small dry-sump engine comprises: a plurality of cylinders; at least one cylinder head provided as corresponding to the cylinders; a crankcase chamber; an oil tank chamber independent of the crankcase chamber, the oil tank chamber being located lower than the cylinder head; and an oil return passage configured such that its upper end communicates with the cylinder heads and its lower end communicates with the oil tank chamber.
Claims24
A small dry-sump engine comprising:
- a plurality of cylinders;
- at least one cylinder head provided as corresponding to the cylinders;
- a crankcase chamber;
- an oil tank chamber independent of the crankcase chamber, the oil tank chamber being located lower than the cylinder head;
- and
- an oil return passage configured such that its upper end communicates with the cylinder head and its lower end communicates with the oil tank chamber.
A small dry-sump engine comprising:
- a crankcase chamber;
- an oil tank chamber adjacent to and independent of the crankcase chamber;
- and
- a communicating passage for allowing an inside of the crankcase chamber to communicate with an inside of the oil tank chamber, the communicating passage having at least one expansion chamber.
A small dry-sump engine comprising:
- a crankcase chamber;
- an oil tank chamber adjacent to and independent of the crankcase chamber;
- a scavenging pump provided between the crankcase chamber and the oil tank chamber for returning an oil inside the crankcase chamber into the oil tank chamber;
- a feed pump provided inside the oil tank chamber, for feeding the oil to a desired position of the engine;
- a common drive shaft for driving the scavenging pump and the feed pump;
- and
- a crankshaft for driving the drive shaft.
The small dry-sump engine according to 16, wherein an outer peripheral wall of the oil tank chamber is formed to cover at least a lower portion of the crankcase chamber, and part of the crankcase chamber constitutes part of a peripheral wall of the oil tank chamber.
A personal watercraft comprising:
- a body constituted by a hull and a deck;
- and
- a small dry-sump engine, the small dry-sump engine including
- a plurality of cylinders;
- at least one cylinder head provided as corresponding to the cylinders;
- a crankcase chamber;
- an oil tank chamber independent of the crankcase chamber, the oil tank chamber being located lower than the cylinder head;
- and
- an oil return passage configured such that its upper end communicates with the cylinder head and its lower end communicates with the oil tank chamber, wherein
- the oil tank chamber is provided between the crankcase chamber of the engine and the hull.
A personal watercraft comprising:
- a body constituted by a hull and a deck;
- and
- a small dry-sump engine including:
- a crankcase chamber;
- an oil tank chamber adjacent to and independent of the crankcase chamber;
- and
- a communicating passage for allowing an inside of the crankcase chamber to communicate with an inside of the oil tank chamber, the communicating passage having at least one expansion chamber, wherein
- the oil tank chamber is provided between the crankcase chamber of the engine and the hull.
A personal watercraft comprising:
- a body constituted by a hull and a deck;
- and
- a small dry-sump engine including:
- a crankcase chamber;
- an oil tank chamber adjacent to and independent of the crankcase chamber;
- a scavenging pump provided between the crankcase chamber and the oil tank chamber for returning oil inside the crankcase chamber into the oil tank chamber;
- a feed pump provided inside the oil tank chamber, for feeding the oil to a desired position of the engine;
- a common drive shaft for driving the scavenging pump and the feed pump;
- and
- a crankshaft for driving the drive shaft, wherein
- the oil tank chamber is provided between the crankcase chamber of the engine and the hull.
Dependencies are inferred from the claim text.