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US 12,091,145 B2Granted
Outboard machine
AssigneeHonda Motor Co., Ltd.
InventorsKazuhiro Ishizaka, Tatsuya Kuroda, Sohei Honda
Life of this patent
Estimating the term…
Abstract
An exhaust pipe has an upstream-side exhaust pipe extending downward from an engine to house a catalyst for exhaust gas purification, and a downstream-side exhaust pipe located downstream of the upstream-side exhaust pipe, and extending upward from the catalyst and then bending downward. Under a configuration in which an exhaust pipe is disposed below an engine, with a simple configuration, a catalyst is hardly exposed to water.
Claims16
An outboard machine comprising:
- an engine provided at a position higher than a water surface;
- and
- an exhaust pipe disposed in a space below the engine,
- wherein the outboard machine is configured to circulate oil in the engine by a dry sump method,
- the exhaust pipe comprises:
- an upstream-side exhaust pipe extending downward from the engine;
- a catalyst for exhaust gas purification located upstream of and above a lower end of the upstream-side exhaust pipe;
- and
- a downstream-side exhaust pipe located downstream of the upstream-side exhaust pipe, the downstream-side exhaust pipe extending upward from the catalyst and then bending downward, and
- the catalyst is disposed outside of an oil pan provided at a lower part of the engine and is disposed at a position of, in a horizontal direction, overlapping with the oil pan.
7 more elements
An outboard machine comprising:
- an engine provided at a position higher than a water surface;
- and
- an exhaust pipe disposed in a space below the engine,
- wherein the exhaust pipe comprises:
- an upstream-side exhaust pipe extending downward from the engine;
- a catalyst for exhaust gas purification located upstream of and above a lower end of the upstream-side exhaust pipe;
- and
- a downstream-side exhaust pipe located downstream of the upstream-side exhaust pipe, the downstream-side exhaust pipe extending upward from the catalyst and then bending downward, and
- the upstream-side exhaust pipe comprises, above the catalyst, a communication hole allowing communication between an inside of the upstream-side exhaust pipe and an outside of the upstream-side exhaust pipe.
6 more elements
An outboard machine comprising:
- an engine provided at a position higher than a water surface;
- and
- an exhaust pipe disposed in a space below the engine,
- wherein the exhaust pipe comprises:
- an upstream-side exhaust pipe extending downward from the engine;
- a catalyst for exhaust gas purification located upstream of and above a lower end of the upstream-side exhaust pipe;
- and
- a downstream-side exhaust pipe located downstream of the upstream-side exhaust pipe, the downstream-side exhaust pipe extending upward from the catalyst and then bending downward, and
- the downstream-side exhaust pipe comprises a rotary exhaust pipe part forming an exhaust path that rotates exhaust gas in an up-down direction once or more.
6 more elements
Dependencies are inferred from the claim text.