Outboard motor
AssigneeHonda Motor Co., Ltd.
InventorYoshihiko Fukuda
Life of this patent
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Abstract
Constraints on arrangement of catalysts are reduced, and early activation and long-term performance maintenance of the catalysts are both achieved. An exhaust pipe includes a first catalyst provided in a first exhaust pipe extending upward on the side of an exhaust manifold, and a second catalyst provided in a second exhaust pipe that extends downward from a bent pipe extending from the first exhaust pipe and that is adjacent to the first exhaust pipe. The second catalyst is disposed at a position offset to a higher location from an up-down middle position of the first exhaust pipe.
Claims12
An outboard motor comprising an engine at a position higher than a water surface, the outboard motor comprising:
- an exhaust manifold provided in the engine to collect exhaust gas from the engine;
- and
- an exhaust pipe extending from the exhaust manifold,
- wherein the exhaust pipe comprises:
- a first exhaust pipe extending upward on a side of the exhaust manifold;
- a bent pipe extending from the first exhaust pipe and bending downward;
- and
- a second exhaust pipe extending downward from the bent pipe and adjacent to the first exhaust pipe,
- a first catalyst for exhaust purification is provided in the first exhaust pipe, and a second catalyst for exhaust purification is provided in the second exhaust pipe, and
- the second catalyst is disposed at a position offset to a higher location from an up-down middle position of the first exhaust pipe.
Dependencies are inferred from the claim text.