Patent ID: 7517501
Filing Date: 2009-04-14
Classification: F01N,Y02A,Y02T

Abstract:
1. A heat exchanger for an exhaust system of a vehicle provided with an internal combustion engine, including upstream and downstream exhaust line sections, comprising: an outer housing member; a first inner metallic housing member disposed within said outer housing member; a second inner metallic housing member disposed within said outer housing member; said first and second inner metallic housing members each comprising a half-shell in the form of a plurality of semicircular pipe sections, said pipe sections being mounted in parallel and joined together by connecting flanges; said second inner metallic housing member being disposed in an inverted relation to said first inner metallic housing member, with respective connecting flanges being disposed in alignment, to thereby define a plurality of aligned flange sections and a plurality of aligned pipe sections that define a plurality of passageways intercommunicating with said exhaust line sections; a single metallic plate member interposed between said first and second inner metallic housing members, said single metallic plate defining a plurality of first sections each disposed between and secured to a pair of connecting flanges of said aligned flange sections, and a plurality of second sections each disposed in one of said passageways defined by said aligned pipe sections, said second sections each having a wave or zigzag form and; means for securing at least one pair of connecting flanges of said aligned flange sections together, wherein one of said connecting flanges includes a portion projecting through an opening in said plate member, and said portion is welded to the other connecting flange of said pair.