Structure of an exhaust manifold branch collecting portion
First Claim
1. A structure of an exhaust manifold branch collecting portion including a collecting pipe for collecting a plurality of exhaust openings, wherein the collecting pipe is constructed as a double collecting pipe arrangement comprised of an inner pipe and an outer pipe, and wherein a noise absorption/heat insulating material to be expanded by heating is arranged between the inner pipe and the outer pipe.
1 Assignment
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Accused Products
Abstract
A structure of an exhaust manifold branch collecting portion includes a double collecting pipe 21 for collecting a plurality of exhaust openings 11A, 17A. The double collecting pipe 21 is comprised of an inner pipe 21-1 and an outer pipe 21-2, which are connected integrally to each other. In a space formed between the inner pipe 21-1, the outer pipe 21-2, and a ring-shaped stainless steel cushion member 22-2, a tubular cushion member 22-1, which is thermally expanded and foamed, is arranged as a restricted cushion structure.
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Citations
12 Claims
- 1. A structure of an exhaust manifold branch collecting portion including a collecting pipe for collecting a plurality of exhaust openings, wherein the collecting pipe is constructed as a double collecting pipe arrangement comprised of an inner pipe and an outer pipe, and wherein a noise absorption/heat insulating material to be expanded by heating is arranged between the inner pipe and the outer pipe.
Specification