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Intake duct for internal combustion engine

A technology for an intake pipe and an internal combustion engine, applied in the field of intake pipes, can solve the problems of increasing the intake air flow resistance of the pipe and the like

Inactive Publication Date: 2019-11-26
TOYOTA BOSHOKU KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, this burr increases the airflow resistance of the intake air through the duct

Method used

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  • Intake duct for internal combustion engine
  • Intake duct for internal combustion engine
  • Intake duct for internal combustion engine

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0019] will now refer to Figures 1 to 6C An intake pipe for an internal combustion engine (hereinafter referred to as intake pipe 10 ) according to an embodiment will be described. In the following description, the upstream side and the downstream side in the flow direction of the intake air in the intake pipe 10 are simply referred to as the upstream side and the downstream side, respectively.

[0020] Such as figure 1 As shown, the intake duct 10 includes a tubular fiber portion 20 , a tubular inlet 12 and a tubular connecting portion 14 . The inlet 12 is located upstream of the fiber section 20 . The connecting portion 14 is located downstream of the fiber portion 20 .

[0021] The inlet 12 constitutes the upstream end of the intake pipe 10 and is made of a hard plastic material. The inlet 12 has a funnel shape in which the inner and outer diameters increase toward the upstream side. The inner diameter of the downstream end of the inlet 12 is substantially the same as...

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PUM

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Abstract

An intake duct for an internal combustion engine includes a tubular side wall made of a fibrous molded body. The side wall includes split bodies that are separate from one another in a circumferentialdirection of the side wall. Flanges respectively protrude outward from opposite ends in the circumferential direction of each of the split bodies. Each of the flanges includes a low-compression portion and a high-compression portion that is located inward from the low-compression portion. Each of the flanges of each of the split bodies is paired with and in contact with one of the flanges of a corresponding one of the split bodies. A joining portion made of a plastic material is arranged on parts of each pair of the flanges in contact with each other, the parts being located outward from thehigh-compression portions, the joining portion surrounding and joining the parts to each other.

Description

technical field [0001] The following description relates to an intake manifold for an internal combustion engine comprising a tubular side wall constructed from a compression-molded fiber molding. Background technique [0002] A typical intake pipe for an internal combustion engine is constructed of a fiber molded body subjected to compression molding (for example, refer to Japanese Patent No. 5350982). The air intake duct described in this document comprises a tubular side wall constructed from two halves, which are produced from a nonwoven molded body. Each half includes outwardly projecting edges from circumferentially opposite ends. The edges of the halves touch each other. A cover made of plastic material is formed by injection molding to surround the edges that touch each other. The covers integrate the halves with each other. [0003] In the intake duct of the above-mentioned document, when the cover is formed, the injected molten plastic may leak toward the inner...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M35/104
CPCF02M35/10091F02M35/10275F02M35/104F02M35/10032F24F13/15F24F2110/40G01F1/6842
Inventor 木村龙介大野知世
Owner TOYOTA BOSHOKU KK