To meet the European emission legislation limits at 80,000 Km, the catalytic converter must have, demonstrated thermal and mechanical durability, as well as excellent catalytic conversion efficiencies. As engine performance increases, and allowable tailpipe emission are reduced, the demand for thermal and mechanical durability is even greater especially for European driving conditions. The system under discussion is a ceramic substrate mounted in the converter with an expanding (intumescent) support mat (See Schematic below).
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