Air intake duct for internal combustion engine
AssigneeToyota Boshoku Kabushiki Kaisha
InventorRyusuke Kimura
Life of this patent
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Abstract
An air intake duct includes a peripheral wall, which is formed by a compressed fiber portion made of a compression molded fiber material. The compressed fiber portion includes high-compression portions having a high compression ratio and low-compression portions having a relatively low compression ratio. The high-compression portions include circumferentially extending sections. Each circumferentially extending section is located in a plane that is perpendicular to an extension direction of the peripheral wall with part of the circumferentially extending section disposed between the low-compression portions. Each circumferentially extending section extends continuously over the entire circumference of the peripheral wall.
Claims5
An air intake duct for an internal combustion engine, comprising a peripheral wall having an annular cross-sectional shape, wherein
- at least part of the peripheral wall is formed by a compressed fiber portion that is made of a compression molded fiber material,
- the compressed fiber portion includes high-compression portions and low-compression portions, the low-compression portions being formed through compression molding at a compression ratio lower than that of the high-compression portions,
- the high-compression portions include a circumferentially extending section,
- the circumferentially extending section is located in a plane that is perpendicular to an extension direction of the peripheral wall with at least part of the circumferentially extending section disposed between the low-compression portions, and
- the circumferentially extending section extends continuously over an entire length of the compressed fiber portion in a circumferential direction of the peripheral wall.
Dependencies are inferred from the claim text.