Utilization of Advanced Three-Way Catalyst Formulations on Ceramic Ultra Thin Wall Substrates for Future Legislation DaimlerChrysler AG

Format:

Book

Conference/Event

Author/Creator:

Schmidt, J., author.

Conference Name:

SAE 2002 World Congress & Exhibition (2002-03-04 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2002

Summary:

The LEV II and SULEV/PZEV emission standards legislated by the US EPA and the Californian ARB will require continuous reduction in the vehicles' emission over the next several years. Similar requirements are under discussion in the European Union (EU) in the EU Stage V program. These future emission standards will require a more efficient after treatment device that exhibits high activity and excellent durabilty over an extended lifetime. The present study summarizes the findings of a joint development program targeting such demanding future emission challenges, which can only be met by a close and intensive co-operation of the individual expert teams. The use of active systems, e.g. HC-adsorber or electrically heated light-off catalysts, was not considered in this study. The following parameters were investigated in detail:The test data indicates that improvements can be made by switching from a 600 cpsi substrate to a 900 cpsi substrate, but further only small advantages can be realized for aged systems by changing from 900 cpsi to 1200 cpsi substrates. From the performance point of view, 900 cpsi substrates seem to be the optimum. For the studies described in this paper the influence of the precious metal (PGM) loading is different for the individual applications and generally more pronounced as compared to the effect of an increased cell density - in most cases a PGM increase beyond 200 g/ft3 does not lead to major changes in the test results

Notes:

Vendor supplied data

Publisher Number:

2002-01-0349

Access Restriction:

Restricted for use by site license