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US 7,461,623 B2Granted
Outboard engine unit
AssigneeHonda Motor Co., Ltd.
InventorsMasanori Tsubouchi, Kazuhiro Ishizaka
Life of this patent
Estimating the term…
Abstract
An outboard engine unit has an intake manifold extending in a front-and-rear direction along one side of an engine block and comprised of a surge tank and a plurality of intake tubes communicating with the surge tank. Each of the intake tubes is arranged so as to be separated in a vertical direction. The shape of the channel cross section of each of the intake tubes is a flat shape in which the dimension in the vertical direction is less than the dimension in a crosswise direction.
Claims4
An outboard engine unit comprising:
- an engine including an engine block, the engine block being comprised of a cylinder block, a cylinder head disposed in a rear portion of the cylinder block, and a crankcase disposed in a front portion of the cylinder block;
- an engine cover defining an engine compartment for accommodating the engine;
- and
- an intake manifold comprised of a single surge tank and a plurality of intake tubes communicating with the surge tank,
- wherein the intake manifold extends in a front-and-rear direction along one side of the engine block, each of the intake tubes is arrayed so as to have a space between each other in a vertical direction, and the shape of a channel cross section of each of the intake tubes is a flat shape having a vertical dimension which is less than a dimension in a crosswise direction.
2 more elements
An outboard engine unit comprising:
- an engine comprised of a cylinder block, a cylinder head disposed in a rear portion of the cylinder block, and a crankcase disposed in a front portion of the cylinder block;
- an engine cover defining an engine compartment for accommodating the engine;
- and
- an intake manifold comprised of a surge tank and a plurality of intake tubes having upstream portions being in communication with the surge tank,
- wherein the intake tubes are arrayed in a vertical direction and have downstream portions being in communication with combustion chambers formed in such a manner as to be aligned in a vertical direction in the cylinder head,
- each of the intake tubes has substantially a same cross-sectional area, and
- the cross-sectional shape of a channel in a highest one of the intake tubes is long in a longitudinal direction, and the cross-sectional shape of a channel in a lowest one of the intake tubes is long in a transverse direction.
4 more elements
Dependencies are inferred from the claim text.