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HISTORICAL APPLICATIONS Support mesh has been used since catalytic converters were introduced for the 1975 model year. Initially, support mesh was used in round or oval, stuffed underbody converters. Support mesh was phased out in the early 1980’s as exhaust manufactures began using intumescent mats instead. The switch was not

2005-01-3508

Support for Diesel Particulate Filters - 50188 Wire Mesh Support Systems for Low-Temperature Gasoline and Diesel Catalytic Converters

INTRODUCTION Sivanandi Rajadurai, Chad Serrell, Shiju Jacob, Rob Morin, Zlatomir Kircanski, and Mike McCarthy Securely mounting catalytic converters within the space designated by automotive designers has been problematic since their introduction in 1975 [1-4]. The low exhaust temperatures produced by diesel engines also affect converter mounting [5, 6]. Low temperature, underbody catalytic converters require some sort of support material to provide constant mounting pressure independent of vermiculite expansion characteristics [7, 8]. This can be achieved by using a non-intumescent mat, a pre-expanded vermiculite mat or a wire mesh support.
ACS Industries Inc. Copyright © 2005 Society of Automotive Engineers, Inc. ABSTRACT Knitted wire mesh supports used in conjunction with radial seals to prevent out-gassing and blow-by, provide a reliable mounting system for low-temperature, underbody catalytic converters. Variables affecting the compression characteristics of the mesh include its wire type, diameter, geometry and density as well as the mesh’s crimp height, courses per inch, needle count, number of strands, temper, surface profile and surface characteristics. The mesh can be tailored to match required radial mounting pressures from conventional to ultra thin wall substrates. Support mesh has also proven durable, without any failures in more that 25 million light-duty vehicle underbody applications. C
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P k studies have also proven the manufacturing process’ capability. All told, wire mesh support systems provide viable alternatives for low temperature gasoline and diesel applications.