INTAKE MANIFOLD WITH IMPRESSIONS FOR IMPROVED NVH PERFORMANCE
First Claim
1. An intake manifold comprising:
- a plenum;
at least one intake runner fluidly attached to said plenum;
first ribs arranged in a first direction on at least one of said plenum and said runner;
second ribs arranged in a second direction on at least one of said plenum and said runner, said first and second ribs intersecting and forming spaces therebetween; and
recessed areas formed in said spaces, said areas being spaced apart from said ribs.
1 Assignment
0 Petitions
Accused Products
Abstract
The disclosed inventive concept provides an intake manifold for an internal combustion engine that demonstrates reduced NVH. The disclosed inventive concept provides an intake manifold having intersecting ribs that extend along both the plenum and the intake runners. Impressions or recessed areas are selectively disposed at critical locations between certain ones of the intersecting ribs. Flat areas are formed between each impression and the adjacent ribs. The shapes of the impressions may be polygonal, round or oval or mixture thereof. The thickness of the intake manifold wall may be constant or variable. The location, shape and depth of each of the impressions are selected to thereby optimize both NVH and flow performances. These impressions provide additional localized stiffness that improves high frequency noise without increasing wall thickness, weight, design complexity, or overall cost of tooling, material or manufacture. The disclosed inventive concept reduces intake manifold NVH particularly at higher frequencies.
-
Citations
20 Claims
-
1. An intake manifold comprising:
-
a plenum; at least one intake runner fluidly attached to said plenum; first ribs arranged in a first direction on at least one of said plenum and said runner; second ribs arranged in a second direction on at least one of said plenum and said runner, said first and second ribs intersecting and forming spaces therebetween; and recessed areas formed in said spaces, said areas being spaced apart from said ribs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. An intake manifold comprising:
-
a plenum; at least one intake runner fluidly attached to said plenum, said plenum and said runner having exterior surfaces; a plurality of ribs arranged on at least some of said exterior surfaces in a substantially cross-hatched manner; spaces formed between said ribs; and recessed areas formed in said spaces, at least some of said areas being surrounded by flat surfaces, said areas being isolated from said ribs by said surfaces. - View Dependent Claims (11, 12, 13, 14)
-
-
15. An intake manifold comprising:
-
a plenum; at least one intake runner fluidly attached to said plenum, said plenum and said runner having exterior surfaces; a plurality of intersecting ribs arranged on at least some of said exterior surfaces of said plenum and said runner; flat surfaces formed between at least some of said intersecting ribs; and recessed areas formed in said spaces, whereby said areas are isolated from said ribs by said flat surfaces. - View Dependent Claims (16, 17, 18, 19, 20)
-
Specification