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Engine

A technology of engine and installation part, applied in the direction of engine components, engine cooling, machine/engine, etc.

Inactive Publication Date: 2011-08-10
YAMAHA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] But, in the cooling system structure of above-mentioned patent document 1 and 2, usually, generally carry out putting in cold water from the lower side, then take out the cold water from the upper side. For the circulation of warm water, in the conventional structure, the water from the water pump is introduced into the lower side of the cylinder block, and then flows from the cylinder body to the upper side of the cylinder head for cooling. The piping from the water pump arranged on the upper side of the cylinder head to the lower side of the cylinder block has the problem of increasing the number of parts and assembly man-hours
[0013] In addition, even in the cooling system structure like the above-mentioned patent documents 3 and 4, there must be piping from the water pump to the cylinder head, and the number of parts and assembly man-hours more problems

Method used

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Embodiment Construction

[0038] Embodiments of this invention will be described below.

[0039] exist figure 1 as well as figure 2 In, the embodiment of this invention is shown.

[0040] First explain the composition, figure 1 Reference numeral 11 is a single-cylinder, 4-cycle, 4-valve engine mounted on a two-wheeled motor vehicle as a saddle-riding vehicle. On this engine 11, a crankshaft 12 is provided, and on this crankshaft 12 via a connecting rod 13 A piston 14 is connected.

[0041] The piston 14 is configured to rotate the crankshaft 12 via the connecting rod 13 when the piston 14 moves up and down in the cylinder block 15 .

[0042] A cylinder head 16 is fixed to the upper side of the cylinder block 15 . A camshaft 20 is rotatably disposed on the cylinder head 16 , and the camshaft 20 and the crankshaft 12 are connected via a cam chain 21 . When the crankshaft 12 is rotated, the camshaft 20 rotates via the cam chain 21 . Furthermore, the camshaft 20 is rotated to open and close the in...

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Abstract

The invention provides an engine, wherein a water pump (19) is arranged on a cylinder head (16), a pump side cooling water passage (28) formed in the water pump (19) is directly connected to a head side cooling water passage (32) formed in the cylinder head (16), and the pump-side mounting part (34) of the water pump (19) is fitted to the head side mounting part (35) of the cylinder head (16) to connect the pump side opening part (28b) of the pump side cooling water passage (28) to the head side opening part (32a) of the head side cooling water passage (32), thus piping from the water pump tothe cylinder head is not required.

Description

technical field [0001] The present invention relates to an engine in which a water pump is mounted on a cylinder head, and a pump-side cooling water passage of the water pump is connected to a head-side cooling water passage of the cylinder head. Background technique [0002] In engines conventionally used in vehicles, etc., fuel is exploded in a fuel chamber, and the energy is used to drive a piston, thereby obtaining driving force from a crankshaft in rotational motion. [0003] At this time, since the temperature of the engine rises due to the explosion of the fuel, the temperature rise of the engine is suppressed by circulating the cooling water in the engine. [0004] The circulation of the cooling water is to use the cooling water pump to guide the cooling water in the radiator to the cylinder block side, and then let it flow into the cylinder head side from the cylinder block to cool the engine (see Patent Document 1 and Patent Document 2). [0005] Also known is an ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01P3/02F01P5/10
CPCF01P2003/024F01P5/10F01P3/02F01P2050/16
Inventor 井上隆司增田辰哉铃木守田中章太郎
Owner YAMAHA MOTOR CO LTD