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By upcoming new global two wheelers emission legislation, it is expected that it will become more and more challenging to control exhaust emissions. Therefore, not only optimized catalyst specifications to meet OBDII or RDE, but also new components will be required for future applications in two-wheeler exhaust systems. In such applications, beneath applying new components, it is necessary to ensure mountability while maintaining vehicle design but improving function of the exhaust system at the same time. As exhaust system layout of two wheelers is generally strongly limited by many factors, such as steeply bended exhaust pipes and catalysts which are hard to resize, one of the most challenging tasks is the positioning of sensor behind the catalyst, due to two wheelers unique exhaust design.

Future emission legislation for 2 and 3 wheelers in EU and many other Countries will introduce durability of pollution control devices. Along with a durable coating technology, the mechanical durability of the substrate must be ensured to guarantee the requested conversion efficiency for the entire life of the motorcycle. A traditional approach consisting in engine bench and vehicle testing is no more competitive considering the very short time to market needed in the motorcycle market and the relevant cost related to this kind of tests. For this reason a new time and cost efficient accelerated component durability test was developed, which can account for the combined effects of critical load at a metallic catalytic converter. This paper shows the methodology used to determine the critical stressors and their levels in real operating conditions by measuring and analyzing a broad range of vehicle test information.