Technical Paper
Durability Studies of Trap Oxidizer Systems
1990-02-01
900108
Trap oxidizer systems for the filtration and oxidation of diesel exhaust particulate have been built and tested for a number of heavy-duty diesel applications. System design has been focused on electrically heated bypassed regeneration using wall flow monolith filters, and microprocessor based control for real time determination of particle mass on the trap. The durability of such systems has been demonstrated in the laboratory, in the engine test cell, and on vehicle applications. An accelerated durability test bench was developed for the purpose of assessing the system's (and especially the ceramic core's) ability to withstand a lifetime of thermal regeneration cycles. The results confirm previous projections regarding ceramic core life. A complete trap oxidizer system was manufactured and installed on a generator set test cell designed specifically to expose trap oxidizer systems to actual exhaust conditions for long term durability studies.