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Water pump attachment structure of water-cooled internal combustion engine

A technology of installation structure and internal combustion engine, which is applied in the direction of engine cooling, mechanical equipment, engine components, etc., and can solve problems such as complicated maintenance work.

Active Publication Date: 2010-07-07
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When performing valve mechanism maintenance such as valve clearance adjustment, in order to remove the cylinder head cover, the water pump housing of the water pump must first be removed from the cylinder head and cylinder head cover, and the maintenance work can be performed from multiple sides of the engine. troublesome

Method used

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  • Water pump attachment structure of water-cooled internal combustion engine
  • Water pump attachment structure of water-cooled internal combustion engine
  • Water pump attachment structure of water-cooled internal combustion engine

Examples

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Embodiment Construction

[0043] Follow the Figure 1 to Figure 8 An example of the present invention will be described.

[0044] The water-cooled internal combustion engine 1 of this embodiment is an internal combustion engine installed in a small vehicle using a single-cylinder 4-stroke SOHC type valve system.

[0045] figure 1 A sectional view showing the vicinity of the cylinder head 3 of the internal combustion engine 1 .

[0046] The internal combustion engine 1 is attached to the vehicle body so that the crankshaft faces the vehicle body width direction and the cylinders are tilted forward.

[0047] which is figure 1 The cross-sectional view shown is a figure which shows right, left, up and down as it is.

[0048] The cylinder head 3 is superimposed on the cylinder body 2, and the two are fastened by fastening bolts 5.

[0049] The valve mechanism 10 arranged on the upper part of the cylinder head 3 is covered by the cylinder head cover 4 from above, and fastened to the cylinder head 3 by f...

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Abstract

A water pump attachment structure of a water-cooled internal combustion engine is provided that can facilitate the maintenance of a valve train. A water pump attachment structure of a water-cooled internal combustion engine is as below. A semicircular cut-away surface (20u) of a water pump holder (20) is opposed to a semicircular surface (3u) of a cylinder head (3) to form a water pump support circular hole (21). Screw members (39b) are passed through respective screw through-holes (3h) of the cylinder head (3) and threadedly engaged with internal thread holes (20h) of the water pump holder (20). Thus, the water pump holder (20) is fastened to the cylinder head (3). A water pump (30) is fitted into and secured to the water pump support circular hole (21). A cylinder head cover (4) is attached to the cylinder head (3) by allowing their mating surfaces to conform with each other with the water pump holder (20) liquid-tightly sandwiched therebetween.

Description

technical field [0001] The invention relates to a water pump installation structure of a water-cooled internal combustion engine. Background technique [0002] In a water-cooled internal combustion engine in which the valve mechanism of the cylinder head with the camshaft is covered by the cylinder head cover, the water pump housing of the water pump is installed across the cylinder head and the cylinder head cover, and is driven by the pump supported by the shaft freely rotatable in the water pump housing The shaft is arranged coaxially with the camshaft and rotates in conjunction with the rotation of the camshaft has been disclosed (for example, refer to Patent Document 1). [0003] Patent Document 1: (Japanese) Patent No. 3963532 [0004] In Patent Document 1, the water pump housing provided across the cylinder head and the cylinder head cover is attached to both the cylinder head and the cylinder head cover with bolts to be supported. [0005] When performing valve mec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01P5/12
CPCF02B75/16F02F7/006F01P5/10F02B67/06F02F1/24
Inventor 山西辉英土屋粒二大城健史三宅丰
Owner HONDA MOTOR CO LTD
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