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Forced air-cooled internal combustion engine and saddle-riding vehicle equipped with same

A technology of forced air cooling and internal combustion engine

Active Publication Date: 2017-04-12
YAMAHA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, if the thin-walled cooling fins are arranged at narrow intervals, the cooling efficiency will increase. However, when the cylinder head and the cylinder block are molded by casting, the fluidity around the cooling fins may decrease, resulting in casting problems. bad

Method used

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  • Forced air-cooled internal combustion engine and saddle-riding vehicle equipped with same
  • Forced air-cooled internal combustion engine and saddle-riding vehicle equipped with same
  • Forced air-cooled internal combustion engine and saddle-riding vehicle equipped with same

Examples

Experimental program
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Embodiment Construction

[0056] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited to the content of the following embodiment.

[0057] exist figure 1 The saddle type vehicle 1 of this embodiment is shown in . figure 1 The saddle type vehicle 1 shown is a scooter-type motorcycle. In addition, the saddle type vehicle according to the present invention is not limited to the scooter type motorcycle 1 . The saddled vehicle according to the present invention may also be a so-called moped type, off-road type, road type, and other types of automatic two-wheeled vehicles. In addition, the saddled vehicle according to the present invention means any vehicle in which a rider straddles, and is not limited to a two-wheeled vehicle. The saddle type vehicle according to the present invention may be a tricycle whose traveling direction is changed by tilting the vehicle body, or other saddle type vehicles such as ATV (All ...

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PUM

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Abstract

There is provided a forced air-cooling type internal combustion engine which excels in both castability and cooling efficiency of a cylinder head and / or a cylinder block. A forced air-cooling type internal combustion engine (101) includes: a cylinder block (103) molded by casting; a cylinder head (100) molded by casting and overlaid on the cylinder block; a shroud (130) covering at least a portion of the cylinder block and at least a portion of the cylinder head; and a fan (121) for rotating to introduce air to the inside of the shroud. At least one of the cylinder block and the cylinder head includes a cooling fin (10) formed at least in a portion covered by the shroud and a cross fin (20) provided so as to cross the cooling fin, the cross fin being connected to the cooling fin. A thickness ( t' ) of the cross fin at a leading edge ( 20a ) thereof is greater than a thickness ( t ) of the cooling fin at a leading edge thereof.

Description

technical field [0001] The invention relates to an internal combustion engine, in particular to a forced air-cooled internal combustion engine. In addition, the present invention relates to a saddled vehicle including a forced air-cooled internal combustion engine. Background technique [0002] Internal combustion engines for saddle-riding vehicles are broadly classified into water-cooled and air-cooled types. The water-cooled type uses cooling fluid such as water as the medium for cooling, and the air-cooled type uses air for cooling. In an air-cooled internal combustion engine, in order to improve cooling efficiency, a plurality of cooling fins are provided on the surface of the internal combustion engine (for example, refer to Patent Document 1). [0003] In addition, as an air-cooled internal combustion engine, a natural air-cooled internal combustion engine and a forced air-cooled internal combustion engine are known. In the natural air cooling type, cooling is perfo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02F1/00F02F1/06
CPCF02F1/06F02F1/32
Inventor 熊谷聪
Owner YAMAHA MOTOR CO LTD