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internal combustion engine

A technology for internal combustion engines and valve trains, applied in mechanical equipment, engine components, machines/engines, etc., can solve problems such as late oil return, block miniaturization of cylinder blocks, and large oil capacity, reduce silt residues, and ensure air tightness , the effect of ensuring strength

Active Publication Date: 2022-03-25
HONDA MOTOR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in the above-mentioned Japanese Patent Application Laid-Open No. 2007-002747, the oil return passage is provided separately from the camshaft transmission chain chamber. Therefore, it is necessary to provide a space for the return passage in the cylinder block, thereby making the cylinder block small. hindering factors
[0004] In addition, in the above-mentioned Japanese Patent Application Laid-Open No. 2007-002747, the camshaft transmission chain chamber itself is used as the oil return passage, so the size of the cylinder block becomes easy, and on the other hand, the return of oil tends to be delayed. , but it is necessary to make the oil capacity more in advance

Method used

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Embodiment Construction

[0030] Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the directions such as front, rear, left, right, etc. in the following description are the same as the directions for the vehicle described below, unless otherwise specified. In addition, the arrow FR which shows the front of the vehicle, the arrow LH which shows the left side of the vehicle, and the arrow UP which shows the upper direction of the vehicle are shown in the figure used for the following description at appropriate parts.

[0031] exist figure 1 In the illustrated motorcycle (straddle-type vehicle) 101, the frame 102 thereof is formed by integrally joining various steel materials by welding or the like. The frame 102 has a single main pipe 108 extending rearward and downward from a head pipe 103 that steerably supports the front wheel suspension system, and has a low portion between the head pipe 103 and a seat 109 for occupant seatin...

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Abstract

An internal combustion engine that can reduce the size of the cylinder block and return oil smoothly. The internal combustion engine is provided with a camshaft chain chamber which is formed in the cylinder block to accommodate the camshaft chain and also functions as a return passage for returning the oil supplied into the cylinder head to the crankcase (2). function, wherein the crankcase (2) has an oil reservoir (51) on the bottom surface side, and the crankcase (2) has a crankcase-side camshaft chain chamber ( 52), an oil drop hole (54) communicating with the oil storage portion (51) is formed on the bottom wall (53) of the crankcase side camshaft transmission chain chamber (52).

Description

technical field [0001] The present invention relates to internal combustion engines. Background technique [0002] Conventionally, as a structure for returning the oil supplied to the valve chamber of the cylinder head to the oil chamber of the crankcase, for example, as disclosed in Japanese Patent Laid-Open No. 2007-002747, there is a case where the oil return is provided separately from the camshaft transmission chain chamber. The structure of the pathway. In addition, as disclosed in Japanese Patent Application Laid-Open No. 2004-218507, there is a structure in which the camshaft drive chain chamber itself is used as an oil return passage. [0003] However, in the above-mentioned Japanese Patent Application Laid-Open No. 2007-002747, the oil return passage is provided separately from the camshaft drive chain chamber, so the space for the return passage needs to be provided in the cylinder block, and the cylinder block is made smaller hindering factors. [0004] In add...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01M11/00F01M11/03F01M9/10
CPCF01M11/0004F01M11/03F01M9/10F01M2011/0029
Inventor 原田诚上村拓真北田芳宏铃木达阳
Owner HONDA MOTOR CO LTD
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