Intake manifold and intake device
AssigneeMikuni Corporation
InventorsNatthavud Songprasert, Hiroyuki Yanazawa
Life of this patent
Estimating the term…
Abstract
An intake manifold M1 includes: a surge tank 10, formed in an elongated tubular shape in a direction of a predetermined axis S; branch pipes 20, extending from the surge tank; an upstream tubular part 50, continuous on an upstream side of the surge tank; an opening part 60, open at an upstream end of the upstream tubular part; a flange part 70, formed around the opening part; an annular seal groove 80, formed at the flange part around the opening part; and fastening parts 90, formed at the flange part around the annular seal groove to fasten a throttle unit. A groove width of the annular seal groove 80 is formed to decrease in the vicinity of the fastening part.
Claims14
An intake manifold, comprising:
- a surge tank, formed in an elongated tubular shape in a direction of a predetermined axis;
- a plurality of branch pipes, extending from the surge tank;
- and
- an upstream tubular part, continuous on an upstream side of the surge tank,
- wherein the upstream tubular part comprises:
- an opening part, open at an upstream end of the upstream tubular part;
- and a flange part, formed around the opening part,
- wherein the flange part comprises:
- an annular seal groove, formed at the flange part around the opening part;
- and a plurality of fastening parts, formed at the flange part around the annular seal groove to fasten a throttle unit, and
- wherein a groove width of the annular seal groove is formed to decrease in a vicinity of the fastening part, the annular seal groove comprises a width-invariant region having a constant groove width and a width-gradually-variant region having a groove width that gradually and continuously varies so as to gradually decrease toward the fastening part and gradually increase away from the fastening part.
Dependencies are inferred from the claim text.