Internal combustion engine and straddle-type vehicle equipped with the engine
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsAkitoshi Nakajima, Toshinori Inomori
Life of this patent
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Abstract
A single-cylinder internal combustion engine includes a knock sensor mounted thereto to suppress a temperature increase of the knock sensor and at the same time detect knocking with high accuracy. The engine includes a cylinder block having a cylinder provided therein, and a cylinder head connected to the cylinder block. On a surface of the cylinder block and the cylinder head, one or more fins protruding from the surface are provided. On the surface of the cylinder block, a sensor mounting boss protruding from the surface and being continuous with a portion of the one or more fins is provided. A knock sensor arranged to detect knocking is mounted to the sensor mounting boss.
Claims15
A single-cylinder internal combustion engine for a vehicle, the single-cylinder internal combustion engine comprising:
- a cylinder block including a cylinder provided therein;
- a cylinder head connected to the cylinder block;
- one or more air-cooled cooling fins protruding from an outside surface of at least one of the cylinder block and the cylinder head;
- a sensor mounting boss protruding from the outside surface of the at least one of the cylinder block and the cylinder head and being continuous with the one or more air-cooled cooling fins at the outside surface of the at least one of the cylinder block and the cylinder head such that no gap is provided between the sensor mounting boss and the one or more air-cooled cooling fins;
- and
- a sensor arranged to detect knocking of the single-cylinder internal combustion engine;
- wherein
- the sensor is mounted to the sensor mounting boss;
- and
- the sensor mounting boss and at least one of the one or more air-cooled cooling fins are integrally formed with each other.
Dependencies are inferred from the claim text.