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Crankcase of a motorcycle engine and ventilation device thereof

A technology for engines and motorcycles, which is applied in crankcase ventilation, engine components, machines/engines, etc. It can solve problems such as manual cleaning of burrs and complex mold structures, and achieves the effects of low implementation cost, simple processing, and material saving

Active Publication Date: 2018-04-13
JIANGMEN DACHANGJIANG GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies in the prior art, the present invention provides a crankcase of a motorcycle engine and its ventilation device, which can solve the problems of complex mold structure caused by crossing molds on the left and right sides and manual cleaning of burrs after casting, and can save Material

Method used

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  • Crankcase of a motorcycle engine and ventilation device thereof
  • Crankcase of a motorcycle engine and ventilation device thereof
  • Crankcase of a motorcycle engine and ventilation device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] refer to Figure 4 with Image 6 , a crankcase of a motorcycle engine, comprising a casing 100, the casing 100 is provided with an air outlet hole 20 communicating with the inside of the casing 100, in order to facilitate the connection of the air outlet pipe, the air outlet hole 20 is pressurized with a trachea joint 3. The air outlet pipe is plugged into the part of the air pipe joint 3 where the air outlet hole 20 is exposed. The periphery of the box body 100 is provided with a number of closing bolt platforms 1 for installing another box body or a cover along the thickness direction of the box body 100. The box closing bolt platform 1 is provided with screw holes 21 or light Hole, here, both can be that screw hole 21 is set in all closing bolt platforms 1 on the box body 100, also can be that light hole is set in all closing bolt platforms 1 on the box body 100, can also be on the box body 100 Screw holes 21 are arranged in part of the closing bolt platform 1 , an...

Embodiment 2

[0037] refer to Figure 10 with Figure 11 , which is different from Embodiment 1 in that the box-fitting bolt table 1 provided with the air outlet 20 is provided with one screw hole 21 .

[0038] refer to Figure 12 , the present invention also discloses a ventilation device for a motorcycle engine, comprising an air filter 5 and the above-mentioned crankcase of a motorcycle engine, the air outlet hole 20 is internally pressurized with a trachea connector 3, and the trachea connector 3 It is connected to the air filter 5 through the air outlet pipe 4 . This structure introduces the mixed gas that has escaped into the box 100 into the air filter 5 through the air outlet pipe 4, and is sucked into the cylinder together with the air in the air filter 5 for combustion, so as to prevent the blow-by gas from being directly discharged into the atmosphere and pollute the environment.

[0039]The present invention makes full use of the existing closing bolt platform 1, and sets the...

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PUM

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Abstract

The invention discloses a crankcase of a motorcycle engine. The closing bolt platform of another box body or cover is installed, and screw holes or light holes are arranged in the closing bolt platform, and the air outlet is arranged on one of the closing bolt platforms. The invention also discloses a ventilation device for a motorcycle engine, which includes an air filter and the above-mentioned crankcase. The air outlet hole is press-fitted with an air pipe joint, and the air pipe joint is connected to the air filter through an air outlet pipe. The present invention does not need additional mounting bosses, which greatly saves materials, and does not need to set raised structures on the left mold, which solves the problem of complex mold structures caused by crossing left and right molds, and does not need to manually clean up flying spots on the cross raised parts. The edge is easy to process.

Description

technical field [0001] The invention relates to the field of motorcycles, in particular to a crankcase of a motorcycle engine and a ventilation device thereof. Background technique [0002] During the compression process and combustion process of the motorcycle engine, due to the gap between the piston and the cylinder, part of the mixed gas in the combustion chamber will escape into the crankcase, causing the pressure in the crankcase to rise. The atmosphere is balanced to avoid the oil from the sealing parts of each shaft system to be pressed outward due to the excessive rise of the internal pressure of the box, resulting in oil leakage, and even the serious problem that the oil seal is directly pressed out. For this reason, it is necessary to arrange the air pipe joint connected to the air outlet pipe on the crankcase, and connect the air outlet pipe to the atmosphere for pressure balance. At the same time, in order to avoid the pollution of the environment caused by the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02F7/00F01M13/00
Inventor 林健明
Owner JIANGMEN DACHANGJIANG GROUP CO LTD