The Effect of MMT on the OBD-11 Catalyst Efficiency Monitor 932855
The effect of MMT on the OBD-II catalyst efficiency monitor has been investigated. The results conclusively show that manganese which is deposited onto the catalyst during the combustion of MMT- containing fuel provides for an increased level of catalyst oxygen storage capacity. This added oxygen storage was found to result in a reduced rear EGO sensor response and caused malfunctioning catalysts to be incorrectly diagnosed by the OBD-II catalyst efficiency monitor.
Citation: Hubbard, C., Hepburn, J., and Gandhi, H., "The Effect of MMT on the OBD-11 Catalyst Efficiency Monitor," SAE Technical Paper 932855, 1993, https://doi.org/10.4271/932855. Download Citation
Author(s):
Carolyn P. Hubbard, Jeffrey S. Hepburn, Haren S. Gandhi
Affiliated:
Ford Motor Co.
Pages: 10
Event:
International Fuels & Lubricants Meeting & Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Catalysts
Combustion and combustion processes
Storage
Manganese
On-board diagnostics (OBD)
Oxygen
Sensors and actuators
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