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Internal combustion engine provided with decompressing mechanisms

A decompression mechanism, internal combustion engine technology, applied in the direction of machines/engines, mechanical equipment, engine components, etc., can solve troubles and other problems, achieve the effect of preventing noise and improving convenience

Inactive Publication Date: 2003-10-22
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Installation of the relief lever and camshaft for the flyweight with the prior art relief mechanism requires pressing the pin into the hole in the camshaft, which is a hassle

Method used

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  • Internal combustion engine provided with decompressing mechanisms
  • Internal combustion engine provided with decompressing mechanisms
  • Internal combustion engine provided with decompressing mechanisms

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Comparison scheme
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Embodiment Construction

[0041] The following will refer to Figure 1- Figure 9 An internal combustion engine provided with a decompression mechanism in a preferred embodiment of the present invention will be described.

[0042]1 to 7 are views to help explain the first embodiment. Referring to Fig. 1, according to the present invention, the internal combustion engine E provided with the decompression mechanism D is a water-cooled, inline, two-cylinder, four-stroke cycle, vertical internal combustion engine, and this internal combustion engine is installed in an external motor, And make the axis of rotation of its crankshaft 8 extend in the vertical direction. This internal combustion engine E comprises: a cylinder block 2, which is provided with two cylinder holes 2a arranged vertically and in parallel, and the axis of the two cylinder holes extends horizontally along the longitudinal direction; a crankcase 3, connected with the front end of the cylinder block 2; A cylinder head 4 is connected to t...

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PUM

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Abstract

An internal combustion engine is provided with a decompressing mechanism (D) including: a pin (71) supported so as to be turnable on a camshaft (15); a flyweight (81) supported for turning relative to the camshaft (15) by the pin (71) on the camshaft (15); and a decompression cam (82) capable of operating together with the flyweight (81) to apply valve opening force to the engine valve(43). The pin (71) is inserted in holes (84) formed in the flyweight (81) so as to be turnable. A spring washer (72) restrains the pin (71)and the flyweight (81) from movement relative to each other, so that generation of rattling noise due to collision between the pin (71) and the flyweight (81) can be prevented or controlled.

Description

technical field [0001] The present invention relates to an internal combustion engine provided with a centrifugal decompression mechanism for reducing the compression pressure in order to boost the internal combustion engine by opening a valve in the internal combustion engine during the compression stroke during starting of the internal combustion engine. start. Background technique [0002] In JP2001-221023A there is disclosed an internal combustion engine provided with centrifugal decompression mechanisms, each of which has a flyweight. In this prior art, there is a relief lever integrally provided with a flyweight and a relief cam. A circular hole is provided, the diameter of which is larger than the diameter of a pin which is extruded into a camshaft perpendicular to the axis of the camshaft. The pressure relief lever is supported by the pin inserted in the circular hole for rotation on the camshaft. [0003] The mounting of the relief lever and camshaft to the flywe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L13/08F02B61/04F02B75/02F02B75/18F02B75/20
CPCF02B2275/20F02B61/045F01L13/085F01L2103/00F02B2075/1808F02B75/20F02B2075/027F01L1/024F01L2303/00
Inventor 高田秀昭铃木宣生吉田裕之
Owner HONDA MOTOR CO LTD