Impact of Fuel Sulfur on OBD-II Catalyst Monitoring Using the Dual Oxygen Sensor Approach 941054
Three vehicle and dynamometer-aged converters were evaluated for performance using the warmed-up portion (termed the “hot-18” cycles) of the Federal Test Procedure (FTP) and during a steady-state cruise using low and high sulfur content fuel. During the steady-state tests the catalyst performance was also monitored using two oxygen sensors designed to satisfy Phase II On-Board Diagnostics (OBD-II) requirements for vehicles sold in California in MY 1994 and thereafter. The performance of two of the converters decreased significantly upon switching to the high sulfur content fuel, and one of the converters which was diagnosed as passing with low sulfur fuel was diagnosed as failing with high sulfur fuel.
Citation: Beck, D., Silvis, T., and Mahan, S., "Impact of Fuel Sulfur on OBD-II Catalyst Monitoring Using the Dual Oxygen Sensor Approach," SAE Technical Paper 941054, 1994, https://doi.org/10.4271/941054. Download Citation
Author(s):
Donald D. Beck, Thomas W. Silvis, Stephen T. Mahan
Affiliated:
AC Rochester
Pages: 13
Event:
International Congress & Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
On- and Off-Board Diagnostics-PT-81
Related Topics:
On-board diagnostics (OBD)
Test procedures
Sensors and actuators
Catalysts
Oxygen
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »
