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US 8,298,026 B2Granted
Outboard motor
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorKatsumi Ochiai
Life of this patent
Estimating the term…
Abstract
An outboard motor includes an engine, an exhaust guide, and a catalyst. The engine includes a cylinder and crankshaft. The crankshaft is disposed along a vertical direction. The exhaust guide is arranged to support the engine from below. The catalyst is disposed in an interior of the engine. The engine includes a cylinder body. The cylinder body includes a housing portion arranged to house the catalyst. The cylinder body includes a first exhaust passage that includes an interior of the housing portion. The catalyst is inserted into the housing portion from below and is sandwiched from above and below by the housing portion and the exhaust guide.
Claims11
An outboard motor comprising:
- an engine including a cylinder, and a crankshaft disposed along a vertical direction;
- an exhaust guide arranged to support the engine from below;
- and
- a catalyst disposed in an interior of the engine;
- wherein
- the engine includes a cylinder body including a housing portion unitary with the cylinder body and arranged to house the catalyst;
- the cylinder body includes a first exhaust passage that includes an interior of the housing portion;
- the housing portion includes, at a lower end portion of the cylinder body, an opening that is not smaller than an outer shape of the catalyst such that the catalyst fits through the opening when inserted from below;
- the catalyst is sandwiched from above and below by the housing portion and the exhaust guide, respectively, when the catalyst is inserted into the housing portion;
- and
- the catalyst is disposed at a side of the cylinder, and the cylinder body includes a first cooling water passage disposed in a periphery of the cylinder and a second cooling water passage disposed in a periphery of the catalyst, the second cooling water passage is connected to the first cooling water passage at a location between the cylinder and the catalyst.
8 more elements
An outboard motor comprising:
- an engine including a cylinder, and a crankshaft disposed along a vertical direction;
- an exhaust guide arranged to support the engine from below;
- and
- a catalyst disposed in an interior of the engine;
- wherein
- the engine includes a cylinder body including a housing portion arranged to house the catalyst;
- the cylinder body includes a first exhaust passage that includes an interior of the housing portion;
- and
- the catalyst is inserted into the housing portion from below, and is sandwiched from above and below by the housing portion and the exhaust guide;
- wherein
- the engine includes a cylinder head coupled to the cylinder body, the cylinder head includes a second exhaust passage arranged to connect the cylinder and the first exhaust passage;
- the cylinder body includes a first mating surface, and a first end surface disposed on a same plane as the first mating surface;
- the cylinder head includes a second mating surface in contact with the first mating surface, and a second end surface disposed on a same plane as the second mating surface;
- the first exhaust passage includes an exhaust entrance arranged to open at the first end surface;
- and
- the second exhaust passage includes an exhaust exit arranged to open at the second end surface, the exhaust exit connected to the exhaust entrance.
13 more elements
An outboard motor comprising:
- an engine including a cylinder, and a crankshaft disposed along a vertical direction;
- an exhaust guide arranged to support the engine from below;
- and
- a catalyst disposed in an interior of the engine;
- wherein
- the engine includes a cylinder body including a housing portion arranged to house the catalyst;
- the cylinder body includes a first exhaust passage that includes an interior of the housing portion;
- the catalyst is inserted into the housing portion from below, and is sandwiched from above and below by the housing portion and the exhaust guide;
- the engine includes a cylinder head coupled to the cylinder body, the cylinder head including a second exhaust passage arranged to connect the cylinder and the first exhaust passage;
- the catalyst is disposed such that an upper end of the catalyst is positioned above a lower end of the cylinder;
- the outboard motor includes a drain passage connected to at least one of the first exhaust passage and the second exhaust passage at an upstream side of the catalyst;
- and
- the drain passage includes a first end portion connected to at least one of the first exhaust passage and the second exhaust passage at the upstream side of the catalyst, and a second end portion connected to the first exhaust passage at a downstream side of the catalyst.
10 more elements
An outboard motor comprising:
- an engine including a cylinder, and a crankshaft disposed along a vertical direction;
- an exhaust guide arranged to support the engine from below;
- and
- a catalyst disposed in an interior of the engine;
- wherein
- the engine includes a cylinder body including a housing portion arranged to house the catalyst;
- the cylinder body includes a first exhaust passage that includes an interior of the housing portion;
- the catalyst is inserted into the housing portion from below, and is sandwiched from above and below by the housing portion and the exhaust guide;
- the engine includes a cylinder head coupled to the cylinder body, the cylinder head including a second exhaust passage arranged to connect the cylinder and the first exhaust passage;
- the catalyst is disposed such that an upper end of the catalyst is positioned above a lower end of the cylinder;
- the outboard motor includes a drain passage connected to at least one of the first exhaust passage and the second exhaust passage at an upstream side of the catalyst;
- the second exhaust passage includes an exhaust exit connected to the first exhaust passage;
- the exhaust exit is disposed above a lowermost end of the second exhaust passage at a downstream side relative to the lowermost end of the second exhaust passage;
- and
- the drain passage is connected to the lowermost end of the second exhaust passage, and is arranged such that water is discharged from the lowermost end of the second exhaust passage to the drain passage.
12 more elements
An outboard motor comprising:
- an engine including a cylinder, and a crankshaft disposed along a vertical direction;
- an exhaust guide arranged to support the engine from below;
- and
- a catalyst disposed in an interior of the engine;
- wherein
- the engine includes a cylinder body including a housing portion arranged to house the catalyst;
- the cylinder body includes a first exhaust passage that includes an interior of the housing portion;
- the catalyst is inserted into the housing portion from below, and is sandwiched from above and below by the housing portion and the exhaust guide;
- the engine includes a cylinder head coupled to the cylinder body, the cylinder head including a second exhaust passage arranged to connect the cylinder and the first exhaust passage;
- the catalyst is disposed such that an upper end of the catalyst is positioned above a lower end of the cylinder;
- the outboard motor includes a drain passage connected to at least one of the first exhaust passage and the second exhaust passage at an upstream side of the catalyst;
- and
- the engine includes a valve connected to the drain passage, the valve arranged to control a flow of a fluid in the drain passage.
10 more elements
Dependencies are inferred from the claim text.