Exhaust manifold with catalytic wall for internal-combustion engines

U.S. Patent Number: 5386696

Abstract: Exhaust manifold for catalytic treatment of the exhaust gases of an internal-combustion engine comprising a metallic outer tube (1) including a catalyst layer (4) in direct contact with the exhaust gases. According to the invention, the manifold also comprises at least one inner tubular element (2), substantially coaxial to said outer tube (1) and providing with the latter at least one space (3), the inner surface of said inner tube (2) being coated by said catalyst layer (4).

Inventors: Prigent; Michel (Rueil Malmaison, FR), Durand; Daniel (Rueil Malmaison, FR), Favennec; Jean (Elancourt, FR)

Assignee: Institut Francais du Petrole (Rueil Malmaison, FR)

Application Number: 08/018,151

Issued: 1995-02-07

Expired: 2007-02-07

Classes: 60/300 ; 422/174; 422/180

Field of search: 60/299,300 422/179,180,174

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